CN101377154B - Running control device of internal combustion engine - Google Patents
Running control device of internal combustion engine Download PDFInfo
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- CN101377154B CN101377154B CN2008102142514A CN200810214251A CN101377154B CN 101377154 B CN101377154 B CN 101377154B CN 2008102142514 A CN2008102142514 A CN 2008102142514A CN 200810214251 A CN200810214251 A CN 200810214251A CN 101377154 B CN101377154 B CN 101377154B
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Abstract
The invention provides an internal combustion engine operation control apparatus for reducing the cost of internal combustion engine operation control apparatus and performing a high precision air fuel ratio control even in the situation that the internal-combustion engine condition detecting mechanism for setting the fuel quantity supplied from the fuel injection valve can not detect the internal-combustion engine condition normally. While the air fuel ratio controlling mechanism (40) of the operation control apparatus of the internal combustion engine E is preheated and throttle valve opening sensor (26) and O2 sensor (27) works normally, the controlling mechanism (40) sets the basic quantity of the fuel quantity Q from the fuel injection valve (20) according to the opening value alpha, and corrects the basic quantity and sets the fuel quantity Q according to the air fuel ratio value detected by the O2 sensor (27); while the preheating is not finished or the throttle valve opening sensor (26) and the O2 sensor (27) works abnormally, the controlling mechanism (40) sets the fuel quantity Q according to the variation quantity delta omega of the angular speed omega of the crank shaft (7).
Description
Technical field
The present invention relates to possess the internal combustion engine operation control gear of internal-combustion engine state detection mechanism and air fuel ratio control mechanism, said internal-combustion engine state detection mechanism detects the state of internal-combustion engine; Said air fuel ratio control mechanism forms the fuel quantity that mechanism supplies with according to the setting state of the internal-combustion engine that the internal-combustion engine state detection mechanism detects from mixed gas.
Background technique
For internal-combustion engine, comprise and installing on the vehicle that improving under the situation that oil consumption and the requirement that improves emission performance further improve, then to reduce cost also be important in order to seek to popularize the internal-combustion engine that satisfies this requirement.
For example know that the internal combustion engine operation control gear that has possesses: detect throttle valve opening throttle valve opening sensor, detect the required time of crank angle of crankshaft rotating regulation time detecting mechanism, set mixed gas and form the air fuel ratio control mechanism that mechanism is the fuel quantity supplied with of fuel injection valve; This air fuel ratio control mechanism carries out the switching of following said control according to the operation range of internal-combustion engine: set the control of fuel quantity according to the aperture of throttle valve, set the control (for example with reference to patent documentation 1) of fuel quantity according to the suction air quantity that time calculated that detects from time detecting mechanism.Utilize this operation controller to be used to set fuel feed and calculate the suction air quantity from the time that time detecting mechanism is detected, so do not need Air flow meter and pressure of inspiration(Pi) sensor, the cost of operation controller is lowered.
Know such internal combustion engine operation control gear is arranged: in order to seek to improve oil consumption and improve emission performance; Set the fundamental quantity that mixed gas forms the fuel feed that mechanism supplies with according to the internal-combustion engine state that is detected by the internal-combustion engine state detection mechanism that detects the internal-combustion engine state, and proofread and correct this fundamental quantity and setting fuel quantity according to the air fuel ratio that is detected by the air-fuel ratio sensor (for example oxygen concentration sensor) that detects air fuel ratio from exhaust gas composition.
Patent documentation 1: TOHKEMY 2004-108289 communique
In internal-combustion engine, the running that comprises air fuel ratio control is controlled under the situation about controlling according to the internal-combustion engine state detection mechanism that detects the internal-combustion engine state, and correctly detecting the internal-combustion engine state with this feeler mechanism is prerequisite.
But detect the air-fuel ratio sensor of exhaust gas composition if just not do not produce normal signal becoming more than the temperature of state of activation.Because internal-combustion engine is in cold machine state when being the state before preheating is accomplished etc., air-fuel ratio sensor is not to be in state of activation, so be stopped according to the air fuel ratio control of air-fuel ratio sensor, is difficult to carry out during this period high-precision air fuel ratio control.For example carrying out according to the aperture of throttle valve under the situation of air fuel ratio control, owing to be when sucking the big running of the variable quantity of air quantity, during the low aperture of throttle valve when idle running and during low load operation etc. so be difficult to improve the precision of air fuel ratio control.
So in order to shorten air-fuel ratio sensor to the time that is activated, if with heater heat air-fuel ratio sensor just can, but be provided with this heater then cost increase.
Likewise,, the internal-combustion engine state detection mechanism that comprises air-fuel ratio sensor when breaking down, also is difficult to carry out the high running control of precision when being in abnormal state.
Summary of the invention
The present invention develops in light of this situation; The purpose of the invention of content 1～3 record of the present invention is to provide a kind of operation controller; Seek to reduce the cost of internal combustion engine operation control gear; Even in the time can not normally detecting the internal-combustion engine state, also can carry out the running control of highi degree of accuracy air fuel ratio control for the needed internal-combustion engine state detection mechanism of fuel quantity of setting the supply of mixed gas formation mechanism.The precision of control from switching time of control to air-fuel ratio sensor conventional when the purpose of the invention of content of the present invention 2 records is further to improve specific before the preheating of air fuel ratio control mechanism is accomplished.
The internal combustion engine operation control gear of content of the present invention 1 record invention possesses: detect the internal-combustion engine state the internal-combustion engine state detection mechanism, form mechanism, set the air fuel ratio control mechanism that said mixed gas forms the fuel quantity that mechanism supplies with to the mixed gas that sucks the air fueling; Wherein, Said internal-combustion engine state detection mechanism possesses: detect said internal-combustion engine throttle valve aperture throttle valve opening sensor, from the exhaust gas composition of said internal-combustion engine detect air fuel ratio air-fuel ratio sensor, detect the angular velocity variation of said I. C. engine crankshaft variation feeler mechanism, detect the preheat mode feeler mechanism of said internal-combustion engine preheat mode; Control and specific time control when said air fuel ratio control mechanism carries out routine, the said said aperture that control detects according to said throttle valve opening sensor when conventional is set the fundamental quantity of said fuel quantity and is proofreaied and correct said fundamental quantity and set said fuel quantity according to the said air fuel ratio of said air-fuel ratio sensor detection; The said variation that said specific time control detects according to said variation feeler mechanism is set said fuel quantity; Said air fuel ratio control mechanism said preheat mode feeler mechanism detect said internal-combustion engine be in preheating and accomplish before the time; Carry out said specific time control, detect said internal-combustion engine when being in preheating and accomplishing, carry out said control when conventional in said preheat mode feeler mechanism.
The invention of content 2 records of the present invention is in the internal combustion engine operation control gear of content 1 record invention of the present invention; Said preheat mode detects according to the testing signal of said air-fuel ratio sensor in said preheat mode feeler mechanism; When said air-fuel ratio sensor becomes state of activation, detect the preheating of said internal-combustion engine state and accomplish.
The internal combustion engine operation control gear of content of the present invention 3 record inventions possesses: detect the internal-combustion engine state the internal-combustion engine state detection mechanism, form mechanism, set the air fuel ratio control mechanism that said mixed gas forms the fuel quantity that mechanism supplies with to the mixed gas that sucks the air fueling; Wherein, Said internal-combustion engine state detection mechanism possesses: detect said internal-combustion engine throttle valve aperture throttle valve opening sensor, from the exhaust gas composition of said internal-combustion engine detect air fuel ratio air-fuel ratio sensor, detect the angular velocity variation of said I. C. engine crankshaft variation feeler mechanism, detect said throttle valve opening sensor and said air-fuel ratio sensor is respectively unusual abnormality detection mechanism; Control and specific time control when said air fuel ratio control mechanism carries out routine, the said said aperture that control detects according to said throttle valve opening sensor when conventional is set the fundamental quantity of said fuel quantity and is proofreaied and correct said fundamental quantity and set said fuel quantity according to the said air fuel ratio of said air-fuel ratio sensor detection; The said variation that said specific time control detects according to said variation feeler mechanism is set said fuel quantity; Detecting said throttle valve opening sensor or said air-fuel ratio sensor in said abnormality detection mechanism has when unusual; Said air fuel ratio control mechanism carries out said specific time control; Not detecting said throttle valve opening sensor and said air-fuel ratio sensor in said abnormality detection mechanism has when unusual, controls when carrying out routine.
Invention based on content 1 record of the present invention; Because the air-fuel ratio controlling organization is after the internal combustion engine preheating is accomplished; Utilize the fundamental quantity of setting based on the aperture of choke valve by the detection signal of air-fuel ratio sensor proofread and correct conventional the time control and set the fuel quantity that forms mechanism's supply from gaseous mixture; So can carry out the running control of the high accuracy air-fuel ratio control of air-fuel ratio sensor, improve discharge performance or improve oil consumption.Before the internal-combustion engine preheating is accomplished; Because air-fuel ratio sensor might not be a state of activation; So the air fuel ratio control mechanism does not carry out the air fuel ratio control of this air-fuel ratio sensor, but sets the fuel quantity that forms mechanism's supply from mixed gas according to the variation of the angular velocity of crankshaft of equal value with sucking air quantity.Consequently; Even under the situation when air-fuel ratio sensor can not normally detect the air fuel ratio as the internal-combustion engine state; In order to set Air flow meter or the pressure of inspiration(Pi) sensor that fuel quantity need not detect necessary suction air quantity yet; So can reduce the cost of operation controller, and before the internal-combustion engine preheating is accomplished, also can carry out being of value to and improving emission performance and improve oil consumption according to the high-precision air fuel ratio control that sucks air quantity.
The item of content 2 records according to the present invention; Since preheat mode feeler mechanism according to the testing signal of air-fuel ratio sensor when air-fuel ratio sensor becomes state of activation; The detection preheating is accomplished; So the conversion precision constantly of control when the testing signal according to air-fuel ratio sensor of control after preheating is accomplished set fuel quantity conventional when having improved specific before preheating is accomplished can improve the emission performance that the air fuel ratio of carrying out according to air-fuel ratio sensor controls or improve oil consumption.
The item of content 3 records according to the present invention; Since the air fuel ratio control mechanism throttle valve opening sensor and air-fuel ratio sensor just often utilizes according to the fundamental quantity of the aperture setting of throttle valve by the testing signal of air-fuel ratio sensor proofread and correct conventional the time control and set the fuel quantity that forms mechanism's supply from mixed gas; So can carry out the running control of the highi degree of accuracy air fuel ratio control of air-fuel ratio sensor, improve emission performance or improve oil consumption.Because the air fuel ratio control of controlling in the time of when throttle valve opening sensor or air-fuel ratio sensor are unusual, routine can not being carried out,, the variation of the air fuel ratio control mechanism basis angular velocity of crankshaft of equal value with sucking air quantity forms the fuel quantity that mechanism supplies with so setting from mixed gas.Consequently; Even when utilizing throttle valve opening sensor and air-fuel ratio sensor can not normally detect respectively as the aperture of the throttle valve of internal-combustion engine state and air fuel ratio; Also can reduce the cost of operation controller with the same reason of invention of content 1 record of the present invention; And when throttle valve opening sensor or air-fuel ratio sensor are unusual, also can carry out according to the high-precision air fuel ratio control that sucks air quantity, for improving emission performance and to improve oil consumption beneficial.
Description of drawings
Fig. 1 is the figure that expression is suitable for internal combustion engine operation control gear structure of the present invention;
Fig. 2 be presentation graphs 1 internal-combustion engine stroke, trigger the figure of the relation of bag, pulse and angular velocity of crankshaft;
Fig. 3 representes the absolute value of angular velocity variation and the curve of suction air relation to the internal-combustion engine rotational speed as parameter in the internal-combustion engine of Fig. 1;
Fig. 4 is that the running of the state before presentation graphs 1 internal-combustion engine is accomplished from preheating begins back O
2The curve of the change in detection signal of sensor;
The flow chart of Fig. 5 control sequence that to be expression undertaken by the air fuel ratio control mechanism of Fig. 1 operation controller.
Symbol description
3 pistons, 7 bent axles, 11 throttle valve, 20 fuel injection valves
34 abnormality detection mechanisms of 33 preheat mode feeler mechanisies, 40 air fuel ratio control mechanisms
41 IGNITION CONTROL mechanisms, 42 exhaust gas recirculation control mechanisms, 43 moving valve control devices
E internal-combustion engine Ne internal-combustion engine rotational speed △ ω variation α aperture
Sa, So, St, Sw testing signal
Embodiment
Followingly embodiments of the invention are described with reference to Fig. 1～Fig. 5.
With reference to Fig. 1, possessing the internal-combustion engine E that is suitable for operation controller of the present invention (being called " operation controller " to place an order) is the internal-combustion engine of single cylinder 4 strokes, is installed in as the vehicle of machinery for example on motor bike or the riding type vehicle.
Internal-combustion engine E comprises: internal combustion engine main body, and it has cylinder body 1 that can to-and-fro motion cooperates with piston 3 and the cylinder cap 2 that combines with this cylinder body 1; Suction means 5, it forms sucking air to the air suction way 5a that is formed on firing chamber 4 guiding between piston 3 and the cylinder cap 2 in internal combustion engine main body; Operation controller, it possesses the fuel injection valve 20 that forms fuel to the supply of suction air and as the mixed gas that forms mixed gas mechanism; Venting gas appliance 6, its be formed with exhaust passageway 6a and the combustion gas that produced the mixed gass in the firing chamber 4 by spark plug 21a ignition as the exterior guiding of exhaust to internal-combustion engine E.
Driven bent axle 7 rotations that are bearing in revolvably in the internal combustion engine main body by the piston that pressure drove 3 of the combustion gas of mixture combustion generation in the firing chamber 4.The power that internal-combustion engine E produces via the actuating unit that comprises speed changer that links with bent axle 7 to the driving wheel transmission.
Suction means 5 comprises: filter the outside inhaled air from internal-combustion engine E clean air-strainer 10, be configured in the throttle valve 11 of the flow of controlling the suction air through air-strainer 10 in the air suction way 5a, be connected with cylinder cap 2 and controlled the suction air that the sucks air quantity sucking pipe 12 to firing chamber 4 guiding by throttle valve 11.Driven Aspirating valves 13 that the intakeport 2i that is arranged on cylinder cap 2 opens and closes by active valve mechanism 23 when driving valve, the suction air that flow at sucking pipe 12 flow into to firing chamber 4 through this intakeport 2i.
The operation controller of controlling combustion engine E operating condition also comprises except the fuel injection valve 20 that is installed in sucking pipe 12: possess spark plug 21a ignition mechanism 21, make exhaust a part to exhaust gas recirculation device 22 that air suction way 5a refluxes, possess the active valve mechanism 23, the internal-combustion engine state detection mechanism (being called " internal-combustion engine state detection mechanism " to place an order) that detects internal-combustion engine E state that are driven in rotation and make the camshaft that Aspirating valves 13 and outlet valve 14 open and close with bent axle 7 synchronously, possess the electronic control unit that the internal-combustion engine state that detects according to the internal-combustion engine state detection mechanism to control respectively the control mechanism 40～43 of fuel injection valve 20, ignition mechanism 21, exhaust gas recirculation device 22 and active valve mechanism 23 (below be called " ECU ") 24.
ECU24 is made up of the computer that possesses input/output interface, central processing unit (CPU) (CPU) and storage device 24a, and this storage device 24a has the RAM of ROM and the interim store various kinds of data of storage various control programs and various chart Mb, Mo, Ms, Mi, Me, Mv etc. etc.
The internal-combustion engine state detection mechanism comprises: as the CKP 25 of the angular sensor that detects bent axle 7 rotational position (below be called " crank position "); Detect the rotational speed feeler mechanism 31 of the internal-combustion engine rotational speed Ne of internal-combustion engine E; Detect the variation feeler mechanism 32 of the variation △ ω of bent axle 7 angular velocity omegas (with reference to Fig. 2); Detect the throttle valve opening sensor 26 of throttle valve 11 aperture α; The oxygen concentration sensor as air-fuel ratio sensor that detects air fuel ratio from the oxygen as exhaust gas composition is O
2Sensor 27, the preheat mode feeler mechanism 33 of detecting internal-combustion engine E preheat mode, detection throttle valve opening sensor 26 and O
2The engine temperature sensor of engine temperature such as the unusual abnormality detection mechanism 34 of sensor 27, the cooling water that detects internal-combustion engine E and lubricating oil temperature, when internal-combustion engine E start, detect when quickening respectively and the feeler mechanism during deceleration etc.
Merging is with reference to Fig. 2; CKP 25 comprises: be arranged on bent axle 7 the triggering bag as detected portion (リ ラ Network タ) 25a and the pick-up 25b as detection unit that is arranged on internal combustion engine main body on the all-in-one-piece rotor 8 are set, and import this testing signal to ECU24.Trigger the scope that bag 25a is set at the crank position of piston 3 before top dead center and is in regulation crankshaft angles θ.Pick-up 25b is taken in when detecting the front-end and back-end of triggering bag 25a respectively at the sense of rotation R of bent axle 7, output rising edge pulse and trailing edge pulse (with reference to Fig. 2).
Therefore, the mean angular velocity ω a of the bent axle 7 between said two pulses can be calculated by ECU24 from following formula.
ωa＝θ/τ
At this, τ is the time between two pulses.
With reference to Fig. 1, internal-combustion engine rotational speed Ne is that bent axle 7 revolves the mean angular velocity when turning around, and is calculated by ECU24 according to the testing signal of CKP 25.
The variation △ ω of the angular velocity omega of bent axle 7 is also according to the testing signal of CKP 25 and calculated by ECU24.Be exactly that the bent axle 7 that variation △ ω detects as CKP 25 is poor the angular velocity omega of specific crank position and internal-combustion engine rotational speed Ne's, goes out from computes specifically.
△ω＝ωa-Ne
Like this, this ECU24 possesses: the part of the internal-combustion engine state detection mechanism preheat mode feeler mechanism 33 that to be rotational speed feeler mechanism 31 detail with variation feeler mechanism 32 and back and abnormality detection mechanism 34 are respectively as the function of ECU24.
With reference to Fig. 2, the angular velocity omega of bent axle 7 changes by each stroke that constitutes these four strokes of circuit suction stroke, compression stroke, burning-expansion stroke and exhaust stroke of internal-combustion engine E.Be exactly that angular velocity omega reduces because the suction of generation suction resistance etc. is done work (Port Application プ bodyguard thing) in suction stroke specifically.Owing to rising, the pressure in the firing chamber 4 causes resistance to compression pression in compression stroke, so angular velocity omega greatly reduces.Pressure in the firing chamber 4 rises owing to the burning produce power at burning-expansion stroke, so angular velocity omega greatly increases.Because burning ends after angular velocity omega reaches peak value, resistance is discharged in the exhaust that is produced by surface friction drag and exhaust makes the angular velocity omega minimizing in exhaust stroke.
Under the identical situation of internal-combustion engine rotational speed Ne (among Fig. 2 shown in the double dot dash line); Angular velocity omega when low suction air quantity or low moment of torsion is such variation shown in solid line among Fig. 2; Angular velocity omega when high suction air quantity or high moment of torsion is such variation shown in dotted line among Fig. 2; Therefore, suction air quantity moment of torsion more or that internal-combustion engine E produces is big more, and then the change of angular velocity omega is just big more.
As shown in Figure 3; Under the certain situation of internal-combustion engine rotational speed Ne; Owing to have strong linear relationship between the variation △ ω of angular velocity omega and the suction air quantity, so can infer the suction air quantity according to variation △ ω for each internal-combustion engine rotational speed Ne.This variation △ ω sucks air quantity owing to can utilize the CKP 25 that detects uses such as internal-combustion engine rotational speed Ne to detect so can not use Air flow meter, pressure of inspiration(Pi) sensor just can detect.
Depend on the position of the triggering bag 25a of CKP 25 at the variation △ of specific crank position ω by the bent axle 7 of variation feeler mechanism 32 detections; Present embodiment is the crank position of piston 3 before top dead center, and to be set at be as the variation △ ω of the angular velocity omega of the compression stroke of specific stroke in these four strokes of suction stroke, compression stroke, burning-expansion stroke and exhaust stroke.Like this, through the variation △ ω before the variation feeler mechanism 32 detection compression top dead center, be that the big crank position of earthquake amount △ ω detects variation △ ω owing to compare, so can detect more accurate variation △ ω with other crank positions.The mean angular velocity ω a that calculates according to CKP 25 is because littler than exhaust top dead center in compression top dead center, so specific for being the mean angular velocity ω a before the compression top dead center.
With reference to Fig. 1, Fig. 4, O
2It is the Detecting element 27a that the solid electrolyte body material of main body is constituted that sensor 27 has by zirconium oxide; Through detecting the oxygen concentration in the exhaust and being that distinguish switch ground and exports on the boundary with the chemically correct fuel: air fuel ratio is at dense proportions of ingredients signal, the rare proportions of ingredients signal of air fuel ratio when bigger than chemically correct fuel than chemically correct fuel hour, and So imports to ECU24 these testing signals.
O
2 Sensor 27 is a unactivated state when Detecting element 27a is low-temperature condition, does not produce the testing signal So of correct reflection oxygen concentration, and it is undesired to move.Therefore, the testing signal So that exports in the time of be according to the state of activation of Detecting element 27a more than becoming set point of temperature controls from fuel injection valve 20 injected fuel amount Q.This O
2Sensor 27 is not provided for heating Detecting element 27a and shortens to the heater of reaching for the state of activation time, and this point has just reduced cost.
As shown in Figure 4, be in cold machine state at internal-combustion engine E, that is, during the running of the state before being in preheating and accomplishing etc., O
2When sensor 27 was unactivated state, the amplitude of dense proportions of ingredients signal and rare proportions of ingredients signal was little, can not detect correct air fuel ratio.So internal-combustion engine E gets into preheating; Amplitude along with the temperature rising of Detecting element 27a between dense proportions of ingredients signal and the rare proportions of ingredients signal becomes big; Moment point in internal-combustion engine E preheating completion; Detecting element 27a reaches the temperature of regulation, reflects that correctly the dense proportions of ingredients signal of air fuel ratio and rare proportions of ingredients signal become the roughly output of certain value respectively.
Therefore, utilize O
2The testing signal So of sensor 27 outputs just can detect the preheat mode of internal-combustion engine E.Be exactly that ECU24 compares according to testing signal So and the reference value of this testing signal So and storage device 24a storage specifically, in the time of in testing signal So is the scope of stipulating, the specified value S that for example dense proportions of ingredients signal is dense proportions of ingredients side
OHMore than and rare proportions of ingredients signal be specified value S than dense proportions of ingredients side
OHThe specified value S of little rare proportions of ingredients side
OLWhen following, O
2Sensor 27 is states of activation, and being judged as is that internal-combustion engine E preheating is accomplished, and is beyond the said predetermined range time at testing signal So, O
2Sensor 27 is unactivated states, judges that internal-combustion engine E is before preheating is accomplished.The function of this judgement preheat mode of ECU24 then constitutes the preheat mode feeler mechanism 33 of detecting internal-combustion engine E preheat mode.
With reference to Fig. 1; ECU24 is according to the testing signal St of throttle valve opening sensor 26 and below during described situation; Judge that throttle valve opening sensor 26 has fault or unusual; These situation are: though this testing signal St not the state continuance in normal range (NR) stipulated time when above, testing signal St in said normal range (NR); But recognize aperture α under situation about changing according to the internal-combustion engine state beyond the throttle valve 11 aperture α such as throttle operation amount or internal-combustion engine rotational speed Ne, certain detecting signal St has still continued the situation of stipulated time when above etc.
Equally, ECU24 is according to O
2When the testing signal So of sensor 27 and described below situation, judge O
2 Sensor 27 has fault or unusual; These situation are: testing signal So not the state continuance in normal range (NR) stipulated time when above, cooling water, the engine temperature such as temperature of lubricant oil, running time according to internal-combustion engine E judge; And the preheating of recognizing internal-combustion engine E is when accomplishing, and certain detecting signal So has still continued stipulated time situation such as when above.This judgement throttle valve opening sensor 26 and the O of ECU24
2Fault is arranged sensor 27 or unusual function constitutes detection throttle valve opening sensor 26 and O
2Sensor 27 is unusual abnormality detection mechanisms 34.
Air fuel ratio control mechanism 40 bases are by throttle valve opening sensor 26, rotational speed feeler mechanism 31, O
2The aperture α that sensor 27, variation feeler mechanism 32, preheat mode feeler mechanism 33 and abnormality detection mechanism 34 are detected respectively, internal-combustion engine rotational speed Ne, the testing signal So of expression air fuel ratio, preheat mode, variation △ ω and throttle valve opening sensor 26 and the O of internal-combustion engine E
2Separately unusual, normal of sensor 27 set from fuel injection valve 20 to the fuel quantity Q (for example fuel injection time) that sucks air jet.
Employed control diagram is stored among the storage device 24a in the setting of fuel quantity Q.This control diagram comprises: aperture α and internal-combustion engine rotational speed Ne decide the fundamental quantity chart Mb of the fundamental quantity Qb of fuel quantity Q as parameter, O
2The testing signal So of sensor 27 decides the correction factor that is used to proofread and correct fundamental quantity Qb or correcting value as parameter correction with chart Mo, fuel chart Ms when deciding fuel quantity Qs when specific specific to variation △ ω and internal-combustion engine rotational speed Ne as parameter, after the igniting chart Mi, exhaust gas recirculation chart Me and the moving valve chart Mv that state.
With reference to Fig. 5, the control of the fuel quantity Q that air fuel ratio control mechanism 40 is carried out in required time is described.
Step S1 judges throttle valve opening sensor 26 or O according to the testing signal Sa (with reference to Fig. 1) of abnormality detection mechanism 34
2Whether sensor 27 is unusual, judges when this and negated and throttle valve opening sensor 26 and O
2All for just often, S2's sensor 27 advances to step, judges O according to the testing signal Sw (with reference to Fig. 1) of preheat mode feeler mechanism 33
2Whether sensor 27 is in state of activation (preheating that is internal-combustion engine E is accomplished).When the judgement of step S2 is affirmed; S3 advances to step; The aperture α of the throttle valve 11 that is detected by throttle valve opening sensor 26 and the internal-combustion engine rotational speed Ne that is detected by rotational speed feeler mechanism 31 retrieve fundamental quantity chart Mb; From fuel injection valve 20 injected fuel amount Q, set and aperture α and the corresponding fundamental quantity Qb of internal-combustion engine rotational speed Ne.Step S4 is according to O then
2The testing signal So of sensor 27 retrieves to proofread and correct and uses chart Mo, proofreaies and correct fundamental quantity Qb and sets fuel quantity Q according to this testing signal So.Then step S5 the drive signal that is used for amount of fuel injected Q to fuel injection valve 20 outputs, fuel injection valve 20 the fuel of fuel quantity Q to suction air jet.
Like this, do not detect throttle valve opening sensor 26 and O in abnormality detection mechanism 34
2 Sensor 27 unusual and O
2When sensor 27 was in state of activation, internal-combustion engine E turned round with the internal-combustion engine state of routine.The processing of steps performed S3, S4 during this routine running, air fuel ratio control mechanism 40 is according to the O of state of activation
2The testing signal So of sensor 27 is dense proportions of ingredients signal and rare proportions of ingredients signal, is used to control control when promptly conventional of the feedback control of air fuel ratio, to form the mixed gas as the chemically correct fuel of target air-fuel ratio.
Step S1 ought detect throttle valve opening sensor 26 or Q according to the testing signal Sa of abnormality detection mechanism 34
2 Sensor 27 is unusual, when the judgement of step S1 is affirmed, and in step S2, according to the testing signal Sw judgement O of preheat mode feeler mechanism 33
2 Sensor 27 is not a state of activation, so internal-combustion engine E is the state before preheating is accomplished, and when the judgement of step S2 was negated, then internal-combustion engine E turned round with specific internal-combustion engine state.And advance to step S6 during this specific running; The internal-combustion engine rotational speed Ne of variation △ ω that is detected by variation feeler mechanism 32 and rotational speed feeler mechanism 31 detections retrieves fuel chart Ms when specific, and corresponding fuel quantity Qs when specific of setting and variation △ ω and internal-combustion engine rotational speed Ne.At this, fuel quantity Qs is set at fuel quantity Q when specific, in step S5, the drive signal that is used for amount of fuel injected Q to fuel injection valve 20 outputs, fuel injection valve 20 the fuel of fuel quantity Q to suction air jet.
Like this, detect throttle valve opening sensor 26 or O by abnormality detection mechanism 34
2When sensor 27 is unusual, or O
2When sensor 27 is not in state of activation, the processing of steps performed S6, air fuel ratio control mechanism 40 carries out and O
2Control when the open loop control that the testing signal So of sensor 27 irrespectively is used to control air fuel ratio is specific.Therefore, when this specific control, do not carry out according to O
2The correction of the fuel quantity Q of the testing signal So of sensor 27.
Said when conventional in the control, as correction, except by O for fundamental quantity Qb
2Outside the testing signal So of sensor 27 proofreaies and correct, in the time of also can carrying out according to the correction of the engine temperature such as temperature of cooling water, lubricant oil or starting, when acceleration or the correction when slowing down.Likewise, in said specific time control, in the time of also can carrying out according to the correction of engine temperature or starting as the correction of fuel quantity Qs when specific, when acceleration or the correction when slowing down.
With reference to Fig. 1, IGNITION CONTROL mechanism 41 is a benchmark with the crank position that CKP 25 detects, according to deciding variation △ ω and internal-combustion engine rotational speed Ne the igniting chart Mi of time of ignition to come control ignition constantly as parameter.Exhaust gas recirculation control mechanism 42 is controlled exhaust gas recirculation amount according to deciding the exhaust gas recirculation chart Me of recycle control valve 22a aperture to control recycle control valve 22a as parameter to variation △ ω and internal-combustion engine rotational speed Ne.Moving valve control device 43 is controlled this driver according to moving valve chart Mv; Should moving valve chart Mv be: variation △ ω and internal-combustion engine rotational speed Ne as parameter; And with the valve ascending amount or open and close constantly correspondingly, decide the driver operating position of valve characteristic changeable mechanism 23a.
Thus, internal-combustion engine E does not possess Air flow meter and pressure of inspiration(Pi) sensor, according to carrying out the running control of internal-combustion engine E with the corresponding time of ignition of suction air quantity, exhaust gas recirculation amount and valve events characteristic.
Said structure embodiment's effect and effect are described below.
When the preheating that detects internal-combustion engine E in preheat mode feeler mechanism 33 is accomplished and abnormality detection mechanism 34 do not detect throttle valve opening sensor 26 or O
2Sensor 27 has when unusual; Carry out following control when conventional: the internal-combustion engine rotational speed Ne of the aperture α of the throttle valve 11 that air fuel ratio control mechanism 40 detects according to throttle valve opening sensor 26 and rotational speed feeler mechanism 31 detections sets the fundamental quantity Qb of fuel quantity Q, and according to O
2The testing signal So of the expression air fuel ratio that sensor 27 detects proofreaies and correct fundamental quantity Qb and sets fuel quantity Q; To detect internal-combustion engine E be before preheating is accomplished the time and abnormality detection mechanism 34 detects throttle valve opening sensor 26 or O in preheat mode feeler mechanism 33
2 Sensor 27 has when unusual, carries out following control when specific: variation △ ω that detects according to variation feeler mechanism 32 and internal-combustion engine rotational speed Ne set fuel quantity Qs when specific.
Thus, air fuel ratio control mechanism 40 is controlled when the fuel quantity Q that the back supplies with fuel injection valve 20 is accomplished in preheating by routine and is set, and controlling during this routine is that handle is according to O
2The feedback control of the fundamental quantity Qb that the testing signal So of sensor 27 proofreaies and correct, so, can carry out O
2The running control of sensor 27 highi degree of accuracy air fuel ratios control, emission performance is enhanced or oil consumption is enhanced.
Because might O before preheating is accomplished
2 Sensor 27 is not a state of activation, so air fuel ratio control mechanism 40 does not carry out O
2The air fuel ratio control of sensor 27, and at throttle valve opening sensor 26 or O
2Sensor 27 when unusual owing to can not carry out the air fuel ratio control of said control when conventional, so set fuel quantity Q according to the variation △ ω of equal value with sucking air quantity.Consequently, even O
2When sensor 27 can not normally detect as the air fuel ratio of internal-combustion engine state, and throttle valve opening sensor 26 and O
2When sensor 27 can not normally detect as the aperture α of internal-combustion engine state and air fuel ratio respectively; Need not detect the Air flow meter or the pressure of inspiration(Pi) sensor of necessary suction air quantity in order to set fuel quantity Q yet; Therefore can reduce the cost of operation controller, and before the preheating of internal-combustion engine E is accomplished and throttle valve opening sensor 26 or O
2When sensor 27 is unusual, also can carry out, be of value to and improve emission performance and improve oil consumption according to the highi degree of accuracy air fuel ratio control that sucks air quantity.
Preheat mode feeler mechanism 33 is according to O
2The testing signal So of sensor 27 detects preheat mode, at O
2When sensor 27 becomes state of activation, detect and be that internal-combustion engine E preheating accomplishes, thus preheat mode feeler mechanism 33 according to testing signal So at O
2When sensor 27 becomes state of activation; Detect and be the preheating completion; So control in the time of improving said specific before preheating is accomplished, after preheating is accomplished set fuel quantity Q said conventional according to testing signal So the time control the switching instant precision, can improve according to O
2The emission performance of the air fuel ratio of sensor 27 control or improve oil consumption.
Owing to set the control of fuel quantity Qs, time of ignition, exhaust gas recirculation amount and valve events characteristic when specific to variation △ ω and internal-combustion engine rotational speed Ne as chart Ms, Mi, Me, the Mv of parameter through retrieval respectively, so set the controlled quentity controlled variable of each control mechanism 40～43 easily.
Below for the embodiment that changes a part of structure of the foregoing description the structure that has changed is described.
The variation △ ω of bent axle 7 angular velocity omegas obtains according to the checkout value that directly detects the angular velocity omega of bent axle 7; But also can be through detecting and bent axle 7 angular velocity omega of the running shafts (the for example live axle of the subsidiary engine of the camshaft of active valve mechanism 23 or internal-combustion engine E) of rotation synchronously, and according to the angular velocity omega of indirect detection bent axle 7.
Oxygen concentration sensor also can be the LAF sensor of oxygen concentration in the linearity test exhaust (being air fuel ratio).At this moment, then can improve oil consumption through setting target air-fuel ratio for lean air fuel ratio.
Variation △ ω also can be the variation △ ω in the stroke beyond the circuit compression stroke.
Internal-combustion engine E also can be installed in vehicle in addition mechanically.
Claims (3)
1. the operation controller of an internal-combustion engine; Possess: detect the internal-combustion engine state the internal-combustion engine state detection mechanism, form mechanism, set the air fuel ratio control mechanism that forms the fuel quantity of mechanism's supply by said mixed gas to the mixed gas that sucks the air fueling; It is characterized in that
Said internal-combustion engine state detection mechanism possesses: detect said internal-combustion engine throttle valve aperture throttle valve opening sensor, from the exhaust gas composition of said internal-combustion engine detect air fuel ratio air-fuel ratio sensor, detect the angular velocity variation of said I. C. engine crankshaft variation feeler mechanism, detect the preheat mode feeler mechanism of said internal-combustion engine preheat mode
Control and specific time control when said air fuel ratio control mechanism carries out routine, the said said aperture that control detects according to said throttle valve opening sensor when conventional is set the fundamental quantity of said fuel quantity and is proofreaied and correct said fundamental quantity and set said fuel quantity according to the said air fuel ratio of said air-fuel ratio sensor detection; The said variation that said specific time control detects according to said variation feeler mechanism is set said fuel quantity,
Said air fuel ratio control mechanism said preheat mode feeler mechanism detect said internal-combustion engine be in preheating and accomplish before the time, carry out saidly controlling when specific; Detect said internal-combustion engine when being in preheating and accomplishing in said preheat mode feeler mechanism, carry out said control when conventional.
2. internal combustion engine operation control gear as claimed in claim 1; It is characterized in that; Said preheat mode detects according to the testing signal of said air-fuel ratio sensor in said preheat mode feeler mechanism; When said air-fuel ratio sensor becomes state of activation, detect the preheating of said internal-combustion engine state and accomplish.
3. the operation controller of an internal-combustion engine; Possess: detect the internal-combustion engine state the internal-combustion engine state detection mechanism, form mechanism, set the air fuel ratio control mechanism that said mixed gas forms the fuel quantity that mechanism supplies with to the mixed gas that sucks the air fueling; It is characterized in that
Said internal-combustion engine state detection mechanism possesses: detect said internal-combustion engine throttle valve aperture throttle valve opening sensor, from the exhaust gas composition of said internal-combustion engine detect air fuel ratio air-fuel ratio sensor, detect the angular velocity variation of said I. C. engine crankshaft variation feeler mechanism, detect said throttle valve opening sensor and said air-fuel ratio sensor is respectively unusual abnormality detection mechanism
Control and specific time control when said air fuel ratio control mechanism carries out routine, the said said aperture that control detects according to said throttle valve opening sensor when conventional is set the fundamental quantity of said fuel quantity and is proofreaied and correct said fundamental quantity and set said fuel quantity according to the said air fuel ratio of said air-fuel ratio sensor detection; The said variation that said specific time control detects according to said variation feeler mechanism is set said fuel quantity,
Detecting said throttle valve opening sensor or said air-fuel ratio sensor in said abnormality detection mechanism has when unusual; Said air fuel ratio control mechanism carries out said specific time control; Not detecting said throttle valve opening sensor and said air-fuel ratio sensor in said abnormality detection mechanism has when unusual, controls when then carrying out routine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007226220A JP4815407B2 (en) | 2007-08-31 | 2007-08-31 | Operation control device for internal combustion engine |
| JP226220/07 | 2007-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101377154A CN101377154A (en) | 2009-03-04 |
| CN101377154B true CN101377154B (en) | 2012-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102142514A Active CN101377154B (en) | 2007-08-31 | 2008-08-29 | Running control device of internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4815407B2 (en) |
| CN (1) | CN101377154B (en) |
| TW (1) | TW200916647A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5158977B2 (en) * | 2009-07-28 | 2013-03-06 | 本田技研工業株式会社 | Air-fuel ratio estimation detection device |
| JP5337065B2 (en) * | 2010-01-22 | 2013-11-06 | 本田技研工業株式会社 | EGR rate estimation detection device |
| JP5581154B2 (en) * | 2010-09-08 | 2014-08-27 | 本田技研工業株式会社 | General-purpose engine control device |
| JP5759142B2 (en) * | 2010-11-04 | 2015-08-05 | 日立オートモティブシステムズ株式会社 | Control device for internal combustion engine |
| DE102011087199A1 (en) * | 2011-05-16 | 2012-11-22 | Robert Bosch Gmbh | Method for operating an internal combustion engine |
| DE102013210178A1 (en) * | 2013-05-31 | 2014-12-04 | Robert Bosch Gmbh | Method for driving a camshaft |
| TWI593875B (en) * | 2016-01-21 | 2017-08-01 | Rong-Bin Liao | Engine control |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5626120A (en) * | 1995-06-05 | 1997-05-06 | Yamaha Hatsudoki Kabushiki Kaisha | Engine control system and method |
| JP2813239B2 (en) * | 1990-06-29 | 1998-10-22 | ヤマハ発動機株式会社 | Engine control device |
-
2007
- 2007-08-31 JP JP2007226220A patent/JP4815407B2/en not_active Expired - Fee Related
-
2008
- 2008-06-17 TW TW97122557A patent/TW200916647A/en not_active IP Right Cessation
- 2008-08-29 CN CN2008102142514A patent/CN101377154B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2813239B2 (en) * | 1990-06-29 | 1998-10-22 | ヤマハ発動機株式会社 | Engine control device |
| US5626120A (en) * | 1995-06-05 | 1997-05-06 | Yamaha Hatsudoki Kabushiki Kaisha | Engine control system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI368688B (en) | 2012-07-21 |
| JP2009057900A (en) | 2009-03-19 |
| TW200916647A (en) | 2009-04-16 |
| JP4815407B2 (en) | 2011-11-16 |
| CN101377154A (en) | 2009-03-04 |
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