WO2009139250A1 - シフト切換機構の異常判定装置および異常判定方法 - Google Patents
シフト切換機構の異常判定装置および異常判定方法 Download PDFInfo
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- WO2009139250A1 WO2009139250A1 PCT/JP2009/057437 JP2009057437W WO2009139250A1 WO 2009139250 A1 WO2009139250 A1 WO 2009139250A1 JP 2009057437 W JP2009057437 W JP 2009057437W WO 2009139250 A1 WO2009139250 A1 WO 2009139250A1
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- Prior art keywords
- shift
- shift position
- switching mechanism
- actuator
- switching
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/32—Electric motors actuators or related electrical control means therefor
- F16H2061/326—Actuators for range selection, i.e. actuators for controlling the range selector or the manual range valve in the transmission
Definitions
- the present invention relates to an abnormality determination of a shift switching mechanism for switching a shift position by an actuator, and more particularly to a technique for detecting a failure of the shift switching mechanism at an early stage.
- a shift switching mechanism in which a shift position is switched by an actuator in accordance with an operation of a shift lever by a driver.
- an electric motor for example, a DC motor
- a shift switching mechanism for example, an electric motor (for example, a DC motor) is used as an actuator that is a power source for shift position switching.
- an electric motor for example, a DC motor
- Patent Document 1 discloses a control device for an automatic transmission that can effectively prevent the behavior of a vehicle against the driver's intention.
- This control device for an automatic transmission has a plurality of shift range positions corresponding to a plurality of shift ranges of the automatic transmission, and one of the plurality of shift range positions is set as a target range position by a driver's switching operation.
- a target range position command means for selecting and converting the target range position into an electrical signal and outputting it as a target range position signal; an actual range switching means for switching the actual range of the automatic transmission according to the target range position signal; An actual range position detecting means for converting the actual range position of the transmission into an electrical signal and detecting it as an actual range position signal; a shift abnormality determining means for determining that an abnormality occurs when the target range position signal and the actual range position signal are different; The power transmission path for cutting the power transmission path from the output shaft of the engine to the drive wheels via the automatic transmission when the shift abnormality determining means determines that there is an abnormality Characterized in that it comprises a cross section.
- An object of the present invention is to provide an abnormality determination device and an abnormality determination method for a shift switching mechanism that detects an abnormality of the shift switching mechanism at an earlier stage.
- An abnormality determination device for a shift switching mechanism is an abnormality determination device for a shift switching mechanism mounted on a vehicle.
- the shift switching mechanism switches the shift position corresponding to the running state of the vehicle to any one of the plurality of shift positions by driving the actuator in response to the switching signal.
- This abnormality determination device is the first drive after the time when the actuator is ready to be driven at the earliest when the first shift position is released among the plurality of shift positions based on the switching signal.
- a determination unit that determines whether or not there is a first shift position other than the first shift position among the plurality of shift positions before switching to the second shift position of the switching destination based on the switching signal in the case of the first drive. Fail to determine whether or not a failure has occurred due to the shift position after the actuator being driven differs from the shift position of the switching destination in the shift switching mechanism by driving the actuator so that it is switched via another shift position.
- a determination unit that determines whether or not a failure has occurred due to the shift position after the actuator being driven differs from the
- the actuator can be driven by the start operation of the vehicle when the driver starts driving the vehicle. That is, it can be said that the first driving after the time when the actuator can be driven at the earliest is a state in which the driver is performing an operation for starting the vehicle while the vehicle is stopped.
- the actuator before switching from the first shift position (for example, parking position) to the switching destination shift position, the actuator is driven to switch via another shift position, and the actuator is driven in the shift switching mechanism. It is determined whether or not a failure has occurred due to a difference between the later shift position and the shift destination shift position. Thereby, the failure of the shift switching mechanism can be detected at an early stage before the vehicle starts traveling.
- the plurality of shift positions are switched in a predetermined order starting from the first shift position in the case of the first drive.
- the fail determination unit determines whether or not a failure has occurred between the first shift position and the slowest shift position in the first drive.
- the abnormality of the shift switching mechanism is detected for all shift positions by determining whether or not a failure has occurred between the first shift position and the slowest shift position. Can do.
- the fail determination unit determines whether or not a failure has occurred by driving the actuator to switch the shift position to the slowest shift position when the second shift position is not the slowest shift position. Determine.
- the actuator when the second shift position is not the slowest shift position, the actuator is driven so as to switch the shift position to the slowest shift position to determine whether or not a failure has occurred in the shift switching mechanism.
- an abnormality of the shift switching mechanism can be detected for all shift positions.
- the vehicle has an engine.
- the fail determination unit determines whether or not a failure has occurred in the shift switching mechanism when it is determined that the first actuator has been driven after the engine is started.
- the engine in a vehicle on which an engine is mounted, the engine is started after the actuator is driven from a stopped state (for example, IG is turned on), and then automatically or automatically by the driver's operation.
- the shift position is switched.
- the actuator is driven to switch to another shift position other than the shift position to be switched to determine whether or not a failure has occurred in the shift switching mechanism, so that an early stage before the vehicle starts running Thus, the failure of the shift switching mechanism can be detected.
- the other shift positions include a forward travel position. Switching from the first shift position to the forward travel position is performed via a shift position other than the first shift position and the forward travel position.
- the fail determination unit determines whether or not a failure has occurred in the shift switching mechanism by driving the actuator to switch to the forward travel position before switching to the second shift position in the case of the first drive.
- the failure of the shift switching mechanism can be detected for all the shift positions by driving the actuator so that the first shift position is switched to the forward travel position.
- the first shift position is a parking position.
- the parking position is released and the shift position is switched to the shift position to be switched, it is determined whether or not a failure has occurred in the shift switching mechanism by driving the actuator to switch to another shift position. By doing so, it is possible to detect a failure of the shift switching mechanism at an early stage before the vehicle starts traveling.
- the abnormality determination device stores the second shift position when it is determined that no failure has occurred in the shift switching mechanism and the shift switching mechanism when switching to another shift position. And an actuator control unit that controls the actuator to switch to the shift position of 2.
- the shift position when the occurrence of a failure is not detected in the shift switching mechanism, the shift position can be switched according to the switching signal by switching to the stored shift position.
- the vehicle is provided with a limiting device for limiting the movement of the vehicle.
- the fail determination unit determines whether or not a failure has occurred in the shift switching mechanism when the movement of the vehicle is restricted by the operation of the restriction device.
- the shift switching mechanism for example, by determining whether or not a failure has occurred in the shift switching mechanism when the movement of the vehicle is restricted in advance by cutting off power transmission to the drive wheels, the shift switching mechanism When the occurrence of a failure is detected, it is possible to prevent a vehicle behavior not intended by the driver from occurring.
- FIG. 3 is a functional block diagram of an SBW-ECU that is an abnormality determination device for a shift switching mechanism according to the present embodiment.
- FIG. 6 is a timing chart showing an operation of the SBW-ECU that is the abnormality determination device for the shift switching mechanism according to the embodiment.
- FIG. 1 shows a configuration of a shift control system 10 including an abnormality determination device for a shift switching mechanism according to the present embodiment.
- the shift control system 10 according to the present embodiment is used for switching the shift position of the vehicle.
- the shift control system 10 includes a shift operation unit 20, an actuator unit 40, a shift switching mechanism 48, an automatic transmission 30, an SBW (Shift By Wire) -ECU (Electronic ControlECUUnit) 50, and an ECT (Electronic Controlled Automatic).
- a transmission (ECU) 52, an EFI (Electronic Fuel Injection) -ECU 54, a VSC (Vehicle Stability Control) -ECU 56, a meter 58, an IG switch 62, an engine 70, and a starter 72 are included.
- the shift operation unit 20 includes a P switch 22 and a shift switch 24.
- the actuator unit 40 includes an actuator 42, an output shaft sensor 44, and an encoder 46.
- the shift control system 10 functions as a shift-by-wire system that switches the shift position by energization control on the actuator. Specifically, the shift switching mechanism 48 is driven by the actuator 42 to switch the shift position.
- the abnormality determination device for the shift switching mechanism according to the present embodiment is realized by the SBW-ECU 50.
- the P switch 22 is a switch for switching the shift position between a parking position (hereinafter referred to as “P position”) and a position other than parking (hereinafter referred to as “non-P position”). And an input unit for receiving an instruction from the driver (both not shown). The driver inputs an instruction to put the shift position into the P position through the input unit.
- the input unit may be a momentary switch.
- a P command signal indicating an instruction from the driver received by the input unit is transmitted to the SBW-ECU 50.
- the shift position may be switched from the non-P position to the P position by using a device other than the P switch 22.
- the switching between the P position and the non-P position may be performed automatically in accordance with, for example, an operation on an accelerator pedal or a brake pedal.
- the SBW-ECU 50 controls the operation of the actuator 42 that drives the shift switching mechanism 48 in order to switch the shift position between the P position and the non-P position, and indicates the current shift position state with an indicator (see FIG. (Not shown).
- the SBW-ECU 50 switches the shift position to the P position and presents the indicator that the current shift position is the P position. To do.
- Actuator 42 is constituted by a switched reluctance motor (hereinafter referred to as “SR motor”), and receives an actuator control signal from SBW-ECU 50 to drive shift switching mechanism 48.
- the encoder 46 rotates integrally with the actuator 42 and detects the rotation state of the SR motor.
- the encoder 46 of this embodiment is a rotary encoder that outputs A-phase, B-phase, and Z-phase signals.
- the SBW-ECU 50 obtains a signal output from the encoder 46, grasps the rotation state of the SR motor, and controls energization for driving the SR motor.
- the shift switch 24 describes the shift position as a forward travel position (hereinafter referred to as “D position”), a reverse travel position (hereinafter referred to as “R position”), and a neutral position (hereinafter referred to as “N position”). ), Or a switch for releasing the P position when the position is switched to the P position.
- a switching signal hereinafter also referred to as a shift signal
- shift switch 24 transmits to SBW-ECU 50 a shift signal indicating a shift position corresponding to the position of an operating member (for example, shift lever) operated by the driver.
- the SBW-ECU 50 controls the shift position in the automatic transmission 30 by the actuator 42 based on a shift signal indicating an instruction from the driver, and presents the current shift position state to the meter 58.
- the SBW-ECU 50 includes a shift position corresponding to the position of the shift lever based on the shift signal received from the shift switch 24, and a shift position based on the rotation amount of the actuator 42 detected by the encoder 46 and the like. If they are different, the actuator 42 is driven so as to switch to a shift position corresponding to the position of the shift lever.
- the automatic transmission 30 is described as being a stepped automatic transmission, but is not particularly limited thereto, and may be, for example, a continuously variable automatic transmission.
- the automatic transmission 30 is provided with a hydraulic circuit including various valves such as a manual valve, for example, and the shift position and the power transmission state change due to a change in hydraulic pressure in the hydraulic circuit. More specifically, the automatic transmission 30 includes a planetary gear mechanism and friction such as a brake element and a clutch element that change a rotation mode of each rotation element (that is, a sun gear, a carrier, a ring gear, and the like) of the planetary gear mechanism. An engagement element is provided.
- the manual valve is provided with a spool valve to slide inside.
- the spool valve moves to a position corresponding to each shift position, the hydraulic pressure in the hydraulic circuit changes according to the moved position.
- the engagement force in the friction engagement element changes according to the change in the hydraulic pressure in the hydraulic circuit, and the automatic transmission 30 changes to a state corresponding to each shift position. That is, the power transmission state from the engine to the drive wheels in the automatic transmission 30 (for example, any one of forward, reverse, and power cut states or a gear ratio) changes.
- the engagement force in these friction engagement elements is controlled by the ECT-ECU 52 using various solenoid valves provided in the hydraulic circuit.
- the automatic transmission 30 has a start clutch 32.
- the start clutch 32 is a friction engagement element that is always engaged when the vehicle starts.
- the start clutch 32 is engaged or released according to a hydraulic control signal from the ECT-ECU 52.
- When the start clutch 32 is engaged power transmission from the engine 70 to the drive wheels is interrupted. Note that the friction engagement element that always engages when the vehicle starts to the front side and the friction engagement element that always engages when the vehicle starts to the rear side may be different.
- the shift switching mechanism 48 includes a shaft connected to the actuator 42.
- the shaft is provided with a detent plate which will be described later.
- the detent plate is connected to a spool valve of a manual valve of the automatic transmission 30 with a rod or the like interposed.
- the spool valve of the manual valve may be directly connected to the shaft.
- the shaft is rotated by the actuator 42. Further, the rotation of the shaft enables the spool valve to move to a position corresponding to each shift position (that is, D position, R position, and N position).
- the spool valve moves to the position corresponding to the D position. Further, when the actuator 42 reaches the rotational position corresponding to the R position, the spool valve is moved to a position corresponding to the R position. Further, when the actuator 42 reaches the rotational position corresponding to the N position, the spool valve moves to a position corresponding to the N position.
- the actuator 42 is described as being an electric motor that is rotationally driven.
- the actuator 42 is not particularly limited to rotational driving, and may be, for example, linearly driven.
- the actuator 42 may be operated by hydraulic pressure, and is not particularly limited to that operated by an electric motor.
- the output shaft sensor 44 detects the rotational position of the shaft 102. Specifically, it is connected to the SBW-ECU 50 and transmits a signal (rotational position signal) indicating the rotation angle of the shaft 102 to the SBW-ECU 50.
- the SBW-ECU 50 detects the shift position based on the received signal indicating the rotational position.
- the memory of the SBW-ECU 50 stores a predetermined output value range corresponding to each shift position.
- the SBW-ECU 50 determines the currently selected shift position by determining which of the ranges corresponding to the respective shift positions corresponds to the received signal indicating the rotation angle of the shaft 102.
- the change in the output value of the output shaft sensor 44 is assumed to have a linear relationship with the change in the rotational position (angle) of the shaft 102.
- the output shaft sensor 44 detects the rotation angle of the shaft 102 that is a physical quantity corresponding to the operation amount of the actuator 42.
- the ECT-ECU 60 is based on the oil temperature detected by an oil temperature sensor (not shown) and physical quantities related to the state of the automatic transmission 30 (for example, the turbine speed, the output shaft speed, and the engine speed). Thus, the shift state of the automatic transmission 30 is controlled.
- the EFI-ECU 54 determines whether the engine, which is an internal combustion engine, is based on an accelerator opening detected by an accelerator opening sensor (not shown) or a physical quantity related to the state of the engine (for example, water temperature, intake air amount, etc.). Control the output.
- the VSC-ECU 56 controls the brake hydraulic pressure based on a physical quantity (for example, wheel speed) related to the behavior of the vehicle, in addition to the brake hydraulic pressure detected by a brake pressure sensor (not shown).
- a physical quantity for example, wheel speed
- a brake pressure sensor not shown
- the meter 58 presents the state of the vehicle equipment, the state of the shift position, and the like.
- the meter 58 is provided with a display unit (not shown) for displaying instructions, warnings, and the like for the driver issued by the SBW-ECU 50.
- the engine 70 is connected to the input shaft of the automatic transmission 30.
- the engine 70 is provided with a starter 72 that is driven when the engine 70 is started.
- the starter 72 When the starter 72 receives the starter drive signal from the EFI-ECU 54, the starter 72 starts driving and cranks the engine 70 (rotates the output shaft of the engine 70). As the starter 72 is driven, the EFI-ECU 54 transmits an engine control signal to the engine 70 so that fuel is supplied to the engine 70 and ignited. In the cranking state, the engine 70 is supplied with fuel, and is started by igniting an air-fuel mixture of the supplied fuel and air.
- the power relay (not shown) is turned on when the driver turns on the IG switch 62.
- the power relay When the power relay is turned on, electric power is supplied to the electric device mounted on the vehicle, and each electric device is activated.
- the IG switch 62 when the IG switch 62 is turned on, power can be supplied to the actuator 42 and the actuator 42 can be driven.
- FIG. 2 shows the configuration of the shift switching mechanism 48.
- the shift position includes a P position and a non-P position (including R, N, and D positions, and in addition to the D position, the D1 position fixed at the first speed and the D2 position fixed at the second speed). including.
- Actuator 42 is connected to shaft 102 with deceleration mechanism 68 interposed. That is, the rotation speed of the actuator 42 is reduced by the reduction mechanism 68 and transmitted to the shaft 102.
- the speed reduction mechanism 68 is configured by combining a plurality of gears, for example.
- the shift switching mechanism 48 is fixed to the shaft 102 that is rotated by the actuator 42, the detent plate 100 that rotates as the shaft 102 rotates, the rod 104 that operates as the detent plate 100 rotates, and the output shaft of the automatic transmission 30.
- the detent plate 100 is driven by the actuator 42 to switch the shift position.
- the actuator 42 is provided with an encoder 46.
- the encoder 46 functions as a counting unit that acquires a count value corresponding to the rotation amount of the actuator 42.
- the encoder 46 is a sensor that detects a rotor rotation angle by generating a pulse signal at the time of a rotation operation by a magnet and a Hall IC arranged at equal intervals on a rotor of an electric motor.
- the encoder 46 increases the counter value as the amount of rotation of the actuator 42 increases (or decreases the counter value if the rotating direction is the negative direction).
- a signal indicating the counter value in the encoder 46 (hereinafter also referred to as a count signal) is transmitted to the SBW-ECU 50.
- the SBW-ECU 50 detects the rotation amount of the actuator 42 based on the increment or decrement of the counter value.
- the SBW-ECU 50 may detect the rotation amount of the shaft 102 based on the increment or decrement of the counter value and the reduction ratio in the reduction mechanism 68.
- FIG. 2 shows a state when the shift position is a non-P position.
- the parking lock pole 106 does not lock the parking lock gear 108, the rotation of the drive shaft of the vehicle is not hindered.
- the shaft 42 is rotated clockwise by the actuator 42 from this state, the rod 104 is pushed in the direction of the arrow A shown in FIG. 2 via the detent plate 100, and parking is performed by the taper portion provided at the tip of the rod 104.
- the lock pole 106 is pushed up in the direction of arrow B shown in FIG.
- the detent plate 100 As the detent plate 100 rotates, one of the two valleys provided at the top of the detent plate 100, that is, the roller 112 of the detent spring 110 in the non-P position position 120, climbs over the mountain 122 and goes to the other valley. That is, the process moves to the P position position 124.
- the roller 112 is provided on the detent spring 110 so as to be rotatable in its axial direction.
- the detent plate 100 rotates until the roller 112 reaches the P position position 124, the parking lock pole 106 is pushed up to a position where the protruding portion of the parking lock pole 106 is fitted between the teeth of the parking lock gear 108. Thereby, the drive shaft of the vehicle is mechanically fixed, and the shift position is switched to the P position.
- the SBW-ECU 50 is operated by the detent spring in order to reduce the load on the components of the shift switching mechanism 48 such as the detent plate 100, the detent spring 110, and the shaft 102 when the shift position is switched.
- the amount of rotation of the actuator 42 is controlled so as to reduce the impact when the 110 roller 112 falls over the mountain 122.
- the SBW-ECU 50 Is in the P position.
- the rotational position of actuator 42 is within a predetermined range corresponding to a non-P position (for example, any one of D, R, and N). Sometimes, it is determined that the shift position is a non-P position.
- the SBW-ECU 50 detects the rotation amount of the actuator 42 based on the counter value detected by the encoder 46.
- SBW-ECU 50 sets the position of at least one shift position among a plurality of shift positions based on the rotational position of the actuator regulated by the regulating member. Therefore, SBW-ECU 50 determines which of the P position, R position, N position, and D position the shift position is based on the counter value detected by encoder 46.
- the SBW-ECU 50 may determine the position of the shift position based on the output value of the output shaft sensor 44 instead of or in addition to the encoder 46, or may determine the position of the shift position using a neutral start switch. You may make it do.
- the present invention allows the SBW-ECU 50 to drive the actuator 42 at the time of releasing the shift position (1) among the plurality of shift positions based on the switching signal at the earliest.
- the shift position (1) of the plurality of shift positions is set before switching to the shift position (2) of the switching destination based on the switching signal.
- the shift position (1) is described as being the P position, but is not particularly limited to the P position, and may be a non-traveling position such as an N position, for example.
- the plurality of shift positions are switched in a predetermined order starting from the shift position (1) in the case of the first drive described above.
- the SBW-ECU 50 determines whether or not a failure has occurred between the shift position (1) and the shift position with the latest order in the case of the first drive described above.
- the SBW-ECU 50 determines whether or not a failure has occurred by driving the actuator 42 to switch the shift position to the slowest shift position when the shift destination shift position (2) is not the slowest shift position. Determine.
- the “latest shift position” is the D position.
- “Fail” means that the shift position is normally switched due to mechanical failure of the rotor inside the actuator 42, the gear of the speed reduction mechanism 68, the manual shaft inside the automatic transmission 30, the detent plate 100 and the spool of the manual valve. The state that cannot be done.
- FIG. 3 is a functional block diagram of the SBW-ECU 50 that is an abnormality determination device for the shift switching mechanism according to the present embodiment.
- the SBW-ECU 50 includes an input interface (hereinafter referred to as an input I / F) 300, an arithmetic processing unit 400, a storage unit 500, and an output interface (hereinafter referred to as an output I / F) 600.
- the input I / F 300 includes an IG signal from the IG switch 62, an encoder (count) signal from the encoder 46, a rotational position signal from the output shaft sensor 44, a shift signal from the shift switch 24, and a P switch 22.
- the P command signal is received and transmitted to the arithmetic processing unit 400.
- the arithmetic processing unit 400 includes a switching request determination unit 402, an initial switching determination unit 404, a target position determination unit 406, a position storage unit 408, a target setting unit 410, a clutch release instruction unit 412, and an actuator control unit ( 1) 414, actual position determination unit (1) 416, abnormality notification unit 418, target resetting unit 420, actuator control unit (2) 422, actual position determination unit (2) 424, and clutch control instruction Part 426.
- the arithmetic processing unit 400 is realized by a CPU (Central Processing Unit), for example.
- the switching request determination unit 402 determines whether there is a request for switching to another shift position other than the P position based on the shift signal. Note that the switching request determination unit 402 may turn on the switching request flag when determining that there is a switching request from the P position to another shift position, for example.
- the initial switching determination unit 404 determines whether or not the switching from the determined P position to another shift position is the first switching after the engine 70 is started. For example, the initial switching determination unit 404 is turned on every time the engine 70 is started, and when a flag that is turned off when the shift position is switched is on, the determined P position is shifted to another shift position. It may be determined that the switching is the first switching.
- the initial switching determination unit 404 determines the first switching after the engine 70 is started.
- the switching is not particularly limited after the engine 70 is started, and the IG switch 62 is turned on at the earliest. What is necessary is just to determine whether it is the first switching request after the time when the actuator 42 can be driven.
- the first time switching determination unit 404 determines whether or not the switching is the first time after the ACC is turned on. Good.
- the initial switching determination unit 404 may determine whether it is the first switching after the start of the engine 70 and the first switching of the day.
- the first time switching determination unit 404 may turn on the first time switching determination flag when determining that the switching is the first time after the engine 70 is started, for example.
- the target position determination unit 406 determines whether or not the shift destination shift position based on the shift signal (hereinafter referred to as a target shift position) is the D position. For example, when the target position determination unit 406 determines that the target shift position is the D position, the target position determination unit 406 may turn on the D position determination flag.
- the position storage unit 408 stores the target shift position in the storage unit 500 when switching from the first P position after the engine is started and the target shift position is not the D position. Note that the position storage unit 408 may store the target shift position in the storage unit 500 when, for example, the switching request flag and the initial switching determination flag are on and the D position determination flag is off. .
- the target setting unit 410 sets the D position as the target shift position when the target shift position is stored in the storage unit 500.
- the clutch release instruction unit 412 generates a clutch release instruction signal so that the starting clutch 32 of the automatic transmission 30 is released, and transmits the clutch release instruction signal to the ECT-ECU 52 via the output I / F 600.
- the ECT-ECU 52 receives the clutch release instruction signal
- the ECT-ECU 52 generates a hydraulic control signal so that the start clutch 32 is released, and transmits the hydraulic control signal to a solenoid that changes the engagement force of the start clutch 32.
- the clutch release instructing unit 412 is configured such that, for example, when the friction engagement element that is always engaged when starting the vehicle on the front side is different from the friction engagement element that is always engaged when starting the rear side, Instruct to release the frictional engagement element.
- the actuator control unit (1) 414 is set to the target shift position in which the target shift position is set and the actual shift position detected based on the encoder signal and / or the rotational position signal when the starting clutch is released is set. Thus, the actuator 42 is controlled.
- the actuator control unit (1) 414 generates an actuator control signal and transmits it to the actuator 42 via the output I / F 600.
- Real position determination unit (1) 416 determines whether or not the actual shift position corresponds to the target shift position. More specifically, the actual position determination unit (1) 416 determines the count value of the encoder 46 that changes as the actuator 42 is driven by the actuator control unit (1) 414 or the shaft 102 detected by the output shaft sensor 44. Based on the rotational position, it is determined whether or not the actual shift position corresponds to the target shift position.
- the actual position determination unit (1) 416 sets the actual shift position to the target after a predetermined time that is predicted to have been moved to the target shift position after the driving of the actuator 42 is started. It may be determined whether or not it corresponds to the shift position, and it is determined whether or not the actual shift position corresponds to the target shift position when the rotation speed of the shaft 102 becomes a predetermined value or less. You may make it do. Further, when the actual position determination unit (1) 416 determines that the actual shift position does not correspond to the target shift position, the abnormality determination flag may be turned on.
- the abnormality notification unit 418 notifies the driver of the occurrence of a failure by giving a warning display or an alarm indicating that a failure has occurred in the shift switching mechanism 48 to the meter 58 or the like. For example, when the abnormality determination flag is on, the abnormality notification unit 418 generates a warning display signal and transmits the warning display signal to the meter 58 via the output I / F 600.
- the target resetting unit 420 resets the shift position stored in the storage unit 500 as the target shift position when it is determined that the actual shift position corresponds to the target shift position. Note that the target resetting unit 420 may reset the stored shift position as the target shift position, for example, when the abnormality determination flag is off.
- Actuator control unit (2) 422 controls actuator 42 so that the actual shift position becomes the target shift position reset by target resetting unit 420.
- the actuator control unit (2) 422 generates an actuator control signal and transmits it to the actuator 42 via the output I / F 600.
- Real position determination unit (2) 424 determines whether or not the actual shift position corresponds to the target shift position. Note that the actual position determination unit (2) 424 may turn on the actual position determination flag when determining that the actual shift position corresponds to the target shift position, for example.
- the clutch control instruction unit 426 instructs clutch control in accordance with the actual shift position after determining that the actual shift position corresponds to the target shift position.
- the clutch control instruction unit 426 For example, if the actual shift position is the D position or the R position, the clutch control instruction unit 426 generates a clutch engagement instruction signal so as to engage the start clutch 32, and performs ECT via the output I / F 600. -Send to ECU52.
- the ECT-ECU 52 When the ECT-ECU 52 receives the clutch engagement instruction signal, the ECT-ECU 52 generates a hydraulic control signal so that the starting clutch 32 or the starting clutch on the reverse side is engaged, and transmits it to the solenoid.
- the clutch control instruction unit 426 does not instruct the engagement of the start clutch 32 when the actual shift position is the N position.
- the clutch control instruction unit 426 may transmit a clutch engagement instruction signal corresponding to the actual shift position to the ECT-ECU 52, for example, when the actual position determination flag is on.
- the instruction unit 426 will be described as functioning as software realized by a CPU (Central Processing Unit) that is the arithmetic processing unit 400 executing a program stored in the storage unit 500. It may be realized by. Such a program is recorded on a storage medium and mounted on the vehicle.
- a CPU Central Processing Unit
- the storage unit 500 stores various information, programs, threshold values, maps, and the like, and data is read or stored from the arithmetic processing unit 400 as necessary.
- step (hereinafter step is referred to as S) 100 SBW-ECU 50 determines whether or not there is a request for switching from the P position to another shift position. If there is a switching request (YES in S100), the process proceeds to S102. If not (NO in S100), the process returns to S100.
- SBW-ECU 50 determines whether or not switching from the P position to another shift position is the first switching after engine 70 is started. If it is determined that it is the first switching after the engine is started (YES in S102), the process proceeds to S104. If not (NO in S102), the process proceeds to S124.
- SBW-ECU 50 determines whether or not the target shift position is the D position based on the shift signal. If the target shift position is the D position (YES in S104), the process proceeds to S124. If not (NO in S104), the process proceeds to S106.
- the SBW-ECU 50 stores the target shift position. In S108, SBW-ECU 50 sets the D position as the target shift position. In S110, the SBW-ECU 50 instructs the start clutch 32 to be released.
- the SBW-ECU 50 controls the actuator 42 so that the actual shift position is set to the target shift position.
- SBW-ECU 50 determines whether or not the actual shift position corresponds to the target shift position. If it is determined that the actual shift position corresponds to the target shift position (YES in S114), the process proceeds to S116. If not (NO in S114), the process proceeds to S126.
- the SBW-ECU 50 resets the shift position stored in S106 as the target shift position.
- the SBW-ECU 50 controls the actuator 42 so as to reach the reset target shift position.
- the SBW-ECU 50 determines whether or not the actual shift position corresponds to the target shift position. If it is determined that the actual shift position corresponds to the target shift position (YES in S120), the process proceeds to S122. If not (NO in S120), the process returns to S118.
- the SBW-ECU 50 instructs clutch control according to the actual shift position.
- SBW-ECU 50 performs normal processing. That is, when the target shift position based on the shift signal and the actual shift position are different, the SBW-ECU 50 controls the actuator 42 so that the target shift position is reached.
- the SBW-ECU 50 notifies the driver of the abnormality detection of the shift switching mechanism 48.
- SBW-ECU 50 which is an abnormality determination device for the shift switching mechanism according to the present embodiment based on the above-described structure and flowchart, will be described with reference to FIG.
- the vehicle is stopped, the engine 70 is stopped, and the shift position is the P position.
- the driver turns on the IG switch 62 and the vehicle power is turned on, power can be supplied to the actuator 42. That is, the actuator 42 can be driven. Further, when the driver performs an operation to drive the starter 72, the engine 70 is started.
- the rotation angle of the shaft 102 changes to the D position side as time passes, and corresponds to the D position at time T (2) as shown by the broken line in FIG.
- the rotation angle is A (1).
- the stored N position is reset as the target shift position (S116).
- the rotation angle of the shaft 102 changes to the N position side, and corresponds to the N position at time T (3).
- the actual shift position corresponds to the target shift position (YES in S120), and since the actual shift position is the N position, the engagement of the start clutch 32 is not instructed (S122).
- the rotation angle of the shaft 102 changes to the D position side as time passes. If the rotation of the shaft 102 is restricted at time T (1) due to, for example, a stick generated in the manual valve of the automatic transmission 30, the state of the rotation angle A (0) continues. Therefore, since the actual shift position does not correspond to the target shift position (NO in S114), the driver is notified of the detection of an abnormality in shift switching mechanism 48 (S126). Since the clutch related to the movement of the vehicle is in a released state, the behavior of the vehicle unintended by the driver due to the abnormality of the shift switching mechanism 48 is prevented.
- the abnormality determination device for the shift switching mechanism at the first switching after the engine is started, before switching from the P position to the switching destination shift position, the other shift positions are used.
- the shift switching mechanism fails when the movement of the vehicle is restricted by releasing the frictional engagement element that engages at the time of starting and shutting off the power transmission to the drive wheels. By detecting this, it is possible to prevent the behavior of the vehicle not intended by the driver from occurring. Therefore, it is possible to provide an abnormality determination device and an abnormality determination method for a shift switching mechanism that detect an abnormality of the shift switching mechanism at an early stage.
- the actuator is driven so as to switch the shift position to the D position, and it is determined whether or not a failure has occurred in the shift switching mechanism.
- an abnormality of the shift switching mechanism can be detected.
- the present invention is applied to a vehicle equipped with an automatic transmission has been described.
- the present invention may be applied to a hybrid vehicle, for example.
- the actuator when the actuator is driven when the P position is released is the first drive after the actuator is ready to be driven, before switching to the shift destination shift position, It may be determined whether or not a failure has occurred in the shift switching mechanism by driving the actuator to switch to a shift position other than the P position. Even if it does in this way, the effect similar to the effect which appears when this invention is applied to the vehicle by which an automatic transmission is mounted is expressed.
- 10 shift control system 20 shift operation section, 22 switch, 24 shift switch, 30 automatic transmission, 32 start clutch, 40 actuator section, 42 actuator, 44 output shaft sensor, 46 encoder, 48 shift switching mechanism, 58 meter, 62 Switch, 68 deceleration mechanism, 70 engine, 72 starter, 100 detent plate, 102 shaft, 104 rod, 106 parking lock pole, 108 parking lock gear, 110 detent spring, 120 position position, 122 mountains, 124 position position, 300 input I / F, 400 arithmetic processing unit, 402 switching request determination unit, 404 initial switching determination unit, 406 target position determination unit, 408 position storage unit, 10 target setting unit, 412 a clutch release instruction section, 418 abnormality notification unit, 420 target resetting unit, 426 a clutch control instruction unit, 500 storage unit, 600 output I / F.
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Abstract
Description
この発明によると、パーキングポジションが解除されて、切換先のシフトポジションにシフトポジションを切り換える前に、他のシフトポジションに切り換えるようにアクチュエータを駆動させてシフト切換機構にフェールが生じたか否かを判定することにより、車両が走行を開始する前の早期の段階でシフト切換機構のフェールを検出することができる。
時間T(0)にて、アクチュエータ42の駆動が開始されると、図5に示すように、シャフト102(ディテントプレート100)の回転角度が増加していく。なお、図5において横軸は時間を示し、縦軸はシャフト102の回転角度を示す。
時間T(0)にて、アクチュエータ42の駆動が開始されると、図5に示すように、シャフト102の回転角度が増加していく。
Claims (16)
- 車両に搭載されたシフト切換機構(48)の異常判定装置であって、前記シフト切換機構(48)は、切換信号に応じて前記車両の走行状態に対応するシフトポジションを、アクチュエータ(42)の駆動により複数のシフトポジションのうちのいずれかのシフトポジションに切換え、
前記切換信号に基づく前記複数のシフトポジションのうちの第1のシフトポジションの解除時の前記アクチュエータ(42)の駆動が、早くとも前記アクチュエータ(42)が駆動可能な状態となった時点の後の最初の駆動であるか否かを判定する判定部(404)と、
前記最初の駆動である場合に、前記切換信号に基づく切換先の第2のシフトポジションに切換える前に、前記複数のシフトポジションのうちの前記第1のシフトポジション以外の他のシフトポジションを経由して切換えるように前記アクチュエータ(42)を駆動させることにより、前記シフト切換機構(48)において前記アクチュエータ(42)の駆動後のシフトポジションと切換先のシフトポジションとが異なることによるフェールが生じたか否かを判定するフェール判定部(416)とを含む、シフト切換機構の異常判定装置。 - 前記複数のシフトポジションは、前記最初の駆動である場合に、前記第1のシフトポジションを起点として予め定められた順序で切り換えられ、
前記フェール判定部(416)は、前記最初の駆動である場合に、前記第1のシフトポジションと、最も順序の遅いシフトポジションとの間において前記フェールが生じたか否かを判定する、請求の範囲第1項に記載のシフト切換機構の異常判定装置。 - 前記フェール判定部(416)は、前記第2のシフトポジションが前記最も順序の遅いシフトポジションでない場合に、シフトポジションを前記最も順序の遅いシフトポジションに切り換えるように前記アクチュエータ(42)を駆動させることにより前記フェールが生じたか否かを判定する、請求の範囲第2項に記載のシフト切換機構の異常判定装置。
- 前記車両は、エンジン(70)を有し、
前記フェール判定部(416)は、前記エンジン(70)の始動後の最初の前記アクチュエータ(42)の駆動が行なわれたことが判定される場合に、前記シフト切換機構(48)に前記フェールが生じたか否かを判定する、請求の範囲第1項に記載のシフト切換機構の異常判定装置。 - 前記他のシフトポジションは、前進走行ポジションを含み、
前記第1のシフトポジションから前記前進走行ポジションへは、前記第1のシフトポジションおよび前記前進走行ポジション以外のシフトポジションをそれぞれ経由して切り換えられ、
前記フェール判定部(416)は、前記最初の駆動である場合に、前記第2のシフトポジションに切り換える前に、前記前進走行ポジションに切り換えるように前記アクチュエータ(42)を駆動させることにより前記シフト切換機構(48)に前記フェールが生じたか否かを判定する、請求の範囲第1項に記載のシフト切換機構の異常判定装置。 - 前記第1のシフトポジションは、パーキングポジションである、請求の範囲第1項に記載のシフト切換機構の異常判定装置。
- 前記異常判定装置は、
前記第2のシフトポジションを記憶する記憶部(500)と、
前記他のシフトポジションへの切換時に前記シフト切換機構(48)にフェールが生じていないことが判定される場合に、前記記憶された第2のシフトポジションに切換えるように前記アクチュエータ(42)を制御するアクチュエータ制御部(422)とをさらに含む、請求の範囲第1項に記載のシフト切換機構の異常判定装置。 - 前記車両には、前記車両の移動を制限するための制限装置(32)が設けられ、
前記フェール判定部(416)は、前記制限装置の作動により前記車両の移動が制限されているときに前記シフト切換機構(48)に前記フェールが生じたか否かを判定する、請求の範囲第1項~第7項のいずれかに記載のシフト切換機構の異常判定装置。 - 車両に搭載されたシフト切換機構(48)の異常判定方法であって、前記シフト切換機構(48)は、切換信号に応じて前記車両の走行状態に対応するシフトポジションを、アクチュエータ(42)の駆動により複数のシフトポジションのうちのいずれかのシフトポジションに切換え、
前記切換信号に基づく前記複数のシフトポジションのうちの第1のシフトポジションの解除時の前記アクチュエータ(42)の駆動が、早くとも前記アクチュエータ(42)が駆動可能な状態となった時点の後の最初の駆動であるか否かを判定するステップと、
前記最初の駆動である場合に、前記切換信号に基づく切換先の第2のシフトポジションに切換える前に、前記複数のシフトポジションのうちの前記第1のシフトポジション以外の他のシフトポジションを経由して切換えるように前記アクチュエータ(42)を駆動させることにより、前記シフト切換機構(48)において前記アクチュエータ(42)の駆動後のシフトポジションと切換先のシフトポジションとが異なることによるフェールが生じたか否かを判定するステップとを含む、シフト切換機構の異常判定方法。 - 前記複数のシフトポジションは、前記最初の駆動である場合に、前記第1のシフトポジションを起点として予め定められた順序で切り換えられ、
前記フェールが生じたか否かを判定するステップは、前記最初の駆動である場合に、前記第1のシフトポジションと、最も順序の遅いシフトポジションとの間において前記フェールが生じたか否かを判定する、請求の範囲第9項に記載のシフト切換機構の異常判定方法。 - 前記フェールが生じたか否かを判定するステップは、前記第2のシフトポジションが前記最も順序の遅いシフトポジションでない場合に、シフトポジションを前記最も順序の遅いシフトポジションに切り換えるように前記アクチュエータ(42)を駆動させることにより前記フェールが生じたか否かを判定する、請求の範囲第10項に記載のシフト切換機構の異常判定方法。
- 前記車両は、エンジン(70)を有し、
前記フェールが生じたか否かを判定するステップは、前記エンジン(70)の始動後の最初の前記アクチュエータ(42)の駆動が行なわれたことが判定される場合に、前記シフト切換機構(48)に前記フェールが生じたか否かを判定する、請求の範囲第9項に記載のシフト切換機構の異常判定方法。 - 前記他のシフトポジションは、前進走行ポジションを含み、
前記第1のシフトポジションから前記前進走行ポジションへは、前記第1のシフトポジションおよび前記前進走行ポジション以外のシフトポジションをそれぞれ経由して切り換えられ、
前記フェールが生じたか否かを判定するステップは、前記最初の駆動である場合に、前記第2のシフトポジションに切り換える前に、前記前進走行ポジションに切り換えるように前記アクチュエータ(42)を駆動させることにより前記シフト切換機構(48)に前記フェールが生じたか否かを判定する、請求の範囲第9項に記載のシフト切換機構の異常判定方法。 - 前記第1のシフトポジションは、パーキングポジションである、請求の範囲第9項に記載のシフト切換機構の異常判定方法。
- 前記異常判定方法は、
前記第2のシフトポジションを記憶する記憶ステップと、
前記他のシフトポジションへの切換時に前記シフト切換機構(48)に前記フェールが生じていないことが判定される場合に、前記記憶された第2のシフトポジションに切換えるように前記アクチュエータ(42)を制御するステップとをさらに含む、請求の範囲第9項に記載のシフト切換機構の異常判定方法。 - 前記車両には、前記車両の移動を制限するための制限装置(32)が設けられ、
前記フェールが生じたか否かを判定するステップは、前記制限装置の作動により前記車両の移動が制限されているときに前記シフト切換機構(48)に前記フェールが生じたか否かを判定する、請求の範囲第9項~第15項のいずれかに記載のシフト切換機構の異常判定方法。
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2008
- 2008-05-13 JP JP2008126252A patent/JP4450093B2/ja not_active Expired - Fee Related
-
2009
- 2009-04-13 CN CN200980116936.8A patent/CN102027270B/zh not_active Expired - Fee Related
- 2009-04-13 WO PCT/JP2009/057437 patent/WO2009139250A1/ja active Application Filing
- 2009-04-13 US US12/991,773 patent/US20110066323A1/en not_active Abandoned
- 2009-04-13 DE DE112009001157T patent/DE112009001157T5/de not_active Ceased
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Also Published As
Publication number | Publication date |
---|---|
US20110066323A1 (en) | 2011-03-17 |
CN102027270A (zh) | 2011-04-20 |
DE112009001157T5 (de) | 2011-03-31 |
CN102027270B (zh) | 2014-11-26 |
JP4450093B2 (ja) | 2010-04-14 |
JP2009275778A (ja) | 2009-11-26 |
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