CN102536583A

CN102536583A - Isobaric constant-voltage and multi-factor compensation firing circuit of gasoline engine

Info

Publication number: CN102536583A
Application number: CN2012100335646A
Authority: CN
Inventors: 曹杨庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-07
Filing date: 2012-02-15
Publication date: 2012-07-04
Also published as: CN105736209A; CN105781848A

Abstract

The invention discloses an isobaric constant-voltage and multi-factor compensation firing circuit of a gasoline engine. Working parameters of a direct current igniter circuit of the existing motorcycle are not convenient to regulate, the firing voltage is affected by rotation speed and fluctuates greatly. Aiming at the shortage of the prior art, a new firing circuit scheme is as follows: an isobaric boosting firing circuit is provided and seen in a figure in the specification; the circuit has high efficiency; the voltage is rapidly boosted to the highest value in a period, so that the output of the energy storing voltage is not affected by the rotation speed; a singlechip performs boosting conversion on a rapid-boosting circuit through a driving circuit, so as to form the isobaric boosted circuit in which the energy storing voltage is independent of the rotation speed; a battery voltage detection is added to compensate the influence of the battery voltage which is used as an independent factor different from the prior art on boosting and energy storage, so as to form the isobaric firing circuit. Aiming at the other working condition factors of the circuit, a novel and excellent practical constant-voltage and multi-factor compensation firing circuit is generated by adopting detection and compensation technologies, and the firing circuit accurately provides a firing voltage as required according to the working conditions of the engine.

Description

Isobaric constant voltage of petrol engine and multifactor compensation point ignition circuit

Technical field

This programme belongs to the internal-combustion engine ignition technical field, relates in particular to a kind of motorcycle or automobile direct current ignitor circuit.

Background technique

Be convenient meter, below narration is many is background with the motorcycle, but limits the application area of invention with this unintentionally.

Igniter has important control action to motorcycle engine, from power to motorcycle, and the pursuit of efficient and emission performance, traditional interchange igniter is substituted by the dc point firearm more and more.Indication dc point firearm is a CDI dc point firearm.

The multiple dc point firearm that is constituted or be combined with single-chip microcomputer by the conditional electronic circuit has appearred at present.The dc point firearm needs the DC low-voltage of battery is dc high voltage through the DC voltage booster circuit rising, and to accumulator or storage capacitor charging, makes it to obtain ignition energy.Ignition energy or ignition voltage are too high or too low all can to influence ignition performance, makes the vehicle performance variation.Engine speed change during the motorcycle operation, booster circuit is to accumulator charge cycle respective change, and ignition voltage is higher when causing dc point firearm low speed, and ignition voltage is on the low side during high speed.And the state of battery more can directly influence ignition voltage.

Motorcycle engine is an ignition voltage appropriateness and balanced to the basic requirement of lighting a fire, and higher requirement then is can cooperate engine operating condition and reduce discharging requirement.The appropriateness of ignition energy or voltage has become a technological points of motorcycle with balanced and to the following of the motor motion state and the factor of reduction of discharging.Existing technology makes ignition voltage balanced for reaching basic demand, detects cell voltage and engine speed, and is in service with certain model compensation.But owing to be multifactor adjusting; Its medium speed is confirmed the influence of ignition voltage is often difficult; Main cause is that the energy storage of boosting of existing DC voltage booster circuit is influenced by rotating speed, and the discreteness of running parameter is big between individuality, comes compensation effect limited with a fixed model.On mean of calculating, do not sum up the DC voltage booster circuit that a cover is convenient to regulate as yet yet.And the latter complicated adjusting is needed especially.In the existing technology, how the igniter DC voltage booster circuit is participated in constituting by an oscillator of being participated in by transformer, and the booster circuit of this structure, running parameter are not easy to output and regulate, and performance is also discrete.Some booster circuits by dutycycle control are closely arranged, fully do not develop as yet yet its possible perseverance (etc.) voltage rise presses transfer characteristic and utilizes its controllability to realize equipressure boost energy storage and constant voltage igniting and ignition energy cooperation engine condition and energy-saving and emission-reduction requirement.

Summary of the invention

Problem and target: existing dc point firearm DC voltage booster circuit is influenced by rotating speed because of ignition voltage or ignition energy, and two kinds influence that independent exists and running parameter disperses, and both has been difficult to Compensation Regulation, lacks effective condition means again.The needs that the higher performance of incompatibility constant voltage igniting and motorcycle and energy-saving and emission-reduction are regulated igniting, the constructional shortcoming of circuit in addition, it is low that activation is imitated, and ignition voltage fluctuates and reaches more than the 60V.Complicated circuit again, it is higher to make debugging cost, and reliability is low.And up-to-date DC voltage booster circuit, function and performance also still are short of to some extent.In general, current C DI firing technique still belongs to extensive, does not catch up with the raising of engine technology and other control techniques of motor.

A kind of storage capacitor voltage climbing speed of intention design is high, can boost to certain transformer, cell voltage rapidly; Peak under the configuration such as drive circuit and computer control waveform makes ignition voltage not influenced by rotating speed, boost in voltage energy storage such as formation; And the performance parameter high conformity, the DC voltage booster circuit of quick booster circuit Operational Limits adjustable (subsequent use) wherein adds other circuit; Be called the isopiestic point ignition circuit, tool constant voltage firing characteristic under certain cell voltage.Add battery voltage detection circuit, utilization booster circuit parameter or the adjustable characteristic of start and stop are done the cell voltage correction to ignition voltage, constitute the constant pressure point ignition circuit.This circuit point ignition voltage is constant, not influenced by rotating speed and cell voltage or the latter's influence is greatly reduced.Constant voltage igniting and the controlled characteristics of boost conversion Operational Limits also are beneficial to and adopt various ignition energy demand factor compensation techniques, after increasing various auxiliary detection circuit, form constant voltage and multifactor compensation point ignition circuit.

Technological scheme: the energy storage cycle of the boosting variation that engine speed change causes makes ignition voltage unstable.It is simple that this programme has designed a kind of hardware configuration, and storage capacitor voltage can be raised to peak fast makes ignition voltage not influenced by rotating speed, and the DC voltage booster circuit that output power is adjustable is claimed the isopiestic point ignition circuit, and block diagram is seen Fig. 1.Scheme comprises some circuit and the function that belongs to existing technology.By the power supply that meets the single-chip microcomputer requirement to single-chip microcomputer and relevant circuit supply (summary).Comprise control circuit (2), firing circuit (3), accumulator (5) is characterized in that: also have drive circuit (7), quick booster circuit (8), this quick booster circuit comprises electronic switch (K1), transformer (B1), diode (D1).Said electronic switch is a bipolar transistor, field effect transistor, IGBT (insulated gate bipolar transistor), intelligent switch or its combination but be not limited to the institute give an example.Said circuit is configured under the certain frequency and duty cycle signals that control circuit sends, booster circuit output electric energy, on accumulator (electric capacity), set up tank voltage and weekly the ceiling voltage of phase have nothing to do with motor or magnetogenerator rotating speed.Wherein quick booster circuit also is the voltage up converting circuit of adjustable power simultaneously.

Single-chip microcomputer is accepted compatible ignition pulse signal; Therefrom analyze the motion state of motor and magnetogenerator, according to optimum advance angle principle, in good time drive ignition circuit; The control end of firing circuit connects control circuit; Its output termination accumulator makes the accumulator discharge, to the elementary output current of high pressure packet, discharges to spark plug through high pressure packet.Quick booster circuit is arranged, and this booster circuit comprises transformer, each one of electronic switch and diode.The input end of drive circuit connects said single-chip microcomputer, and its output terminal connects the control end as the electronic switch of the input end of quick booster circuit, and the power input end of this electronic switch connects the elementary of boosting transformer, another termination battery of this primary.The power take-off of electronic switch is through the sample resistance ground connection or the direct ground connection of drive circuit.The anode of boosting transformer secondary high output terminating diode, the other end of diode connects accumulator as the output terminal of quick booster circuit.Through drive circuit, control electronic switch by control circuit or single-chip microcomputer, make transformer elementary connect battery intermittently and go out high-tension electricity at secondary induction charge to accumulator through diode.Transformer converts elementary low pressure into secondary high pressure output by this control, and its output voltage of while, power also can be according to changing with the start and stop of control and the change in duty cycle of control waveform.

To the preferred various drive circuits in the existing technology of the driving of electronic switch.Selecting principle for use is that appropriateness strengthen to drive, alleviate device heating and raise the efficiency, and under certain frequency and duty cycle signals that control circuit sends, accumulator weekly the ceiling voltage of phase reach 180-200V or more than, and high conformity.As when adopting bipolar device to make electronic switch; Can select for use triode+diode to drive Darlington transistor; And resistance+diode series connection also has stronger driving effect; When not needing to drive very by force, can use single resistance to drive or adopt certain current limiting technique, the latter is a purpose to improve circuit efficiency often also.Is example with Darlington transistor TIP122 as electronic switch; This case design also records triode and diode has tangible acceleration and humidification in driving; This acceleration and humidification strengthen transformer output, and efficient improves, and show as the storage capacitor rate of pressure rise and raise more than 40%; Can up to 100V/ms or more than, ceiling voltage improves more than 30%.The no-load voltage ratio of transformer, the number of turn, and running parameter is all relevant with the output performance that boosts.The transformer current frequency can be higher than 3K.Dutycycle is as the power adjustments factor; Also relevant with rate of pressure rise, but dutycycle should be less than 0.2, and power frequency raises; Output voltage is raise; But device heat loss meeting increases, and needs to reduce duty balance recently, makes load and the temperature rise of transformer and drive circuit unlikely too high and can obtain high rate of pressure rise simultaneously.With certain control frequency and primary current, under motorcycle 12V cell voltage, 2-2.5ms or can rise to ceiling voltage sooner, and under certain cell voltage, keep weekly the peak that the phase equates, promptly tank voltage value and rotating speed have nothing to do.And consider that power consumption appropriateness, general motorcycle engine igniting charging tank voltage should be controlled at 180-200V, automobile and special requirement be meter in addition.

When needs restriction rate of pressure rise and circuit power consumption, drive circuit can be provided with current-limiting circuit, in the primary loop sample resistance is set, and sampling voltage feeds back to driving through triode.Its Cycle by Cycle current limliting drives function and forms the primary maximum current limit.Current-limiting resistance is 0-1 ohm, preferred 0.15-0.3 ohm.Under preferred value, the maximum current when the primary maximum current drives design less than no current limliting, the general optional 30-40% of the range of decrease.Current limliting drives and to have improved quick booster circuit voltage transitions and to the charge efficiency of storage capacitor, to have reduced the temperature rise of electronic switch.Current limliting is the restraining factors of rate of pressure rise, needs to make a choice with the temperature rise balance.Be to practice thrift power consumption, reduce the device temperature rise, can also limit quick booster circuit is to move duration in the cycle at the operation angle of light-off period, power consumption is reduced and ignition voltage still can reach peak.The big I of primary maximum current border factually needs design.Aforesaid various factors combination is in conjunction with primary current size, dutycycle; Power frequency, the elevation rate of the control signal that transformer voltage ratio and computer produce is to possess one of which to produce high rate of pressure rise; Its two in needed time such as 2.5ms (design as required), reach boost conversion (charging energy storage) voltage peak key; The latter particularly, the two makes weekly, and the tank voltage peak is that ignition voltage can be independent of rotating speed in the phase, makes firing circuit have the equipressure energy-storage property that boosts.So-called equipressure is meant that under certain cell voltage constant boost energy storage peak or ignition voltage are all arranged in the different light-off periods, not influenced by rotating speed.Above allocation plan is claimed the isopiestic point ignition circuit.Can constitute the constant voltage ignitor circuit under the certain voltage based on this.

The square wave generation circuit that drive circuit also can adopt 555 circuit to form, its 3 pin can design dutycycle and frequency to the control end output square wave of electronic switch, the analogue computer control waveform, but dutycycle and frequency are difficult for regulating.Control circuit (single-chip microcomputer) is done start and stop control to 555 circuit, or its output is controlled, with the boost start and stop of energy storage of control.Except that equipressure was boosted, if the tank voltage curve that its tool straight line is risen, its phase operation duration weekly of start and stop control capable of using was made required Compensation Regulation, the cell voltage and the multifactor compensation of seeing after and stating.

Utilize the single-chip microcomputer function; Increase battery voltage detection circuit, obtain the cell voltage influence of ignition voltage and the relational model that changes with Control Parameter, and design wherein fast that the parameter of booster circuit comprises that certain power is rich with experiment; Make when cell voltage reduces; By the dutycycle that single-chip microcomputer is regulated the electronic switch operation through drive circuit, circuit has the ability ignition voltage is made the compensation that cell voltage changes, and becomes lower at cell voltage; So that fast under the constant situation of the unable maintenance ignition voltage of energy that provides of booster circuit, still can reduce the deviation of ignition voltage.By contrast,, do not receive the restriction that energy is supplied with to the correction of the higher ignition voltage deviation that causes of cell voltage, just easier.Too high when surpassing 15V (motorcycle) to cell voltage, for avoiding, then can take to stop measures such as igniting than major break down.More than the circuit of configuration is claimed the constant pressure point ignition circuit.Existing technology also considers ignition voltage is done the compensation of rotating speed and cell voltage variation, but under existing technology, the two is the independent factor each other, and existing technology more has the shortcoming of conformity difference between the booster circuit individuality.And the constant pressure point ignition circuit makes cell voltage become independent factor to ignition voltage influence, and its compensation model is simple, high conformity between individuality, and compensation effect is good, approaches the closed loop correction, and novel circuit scheme technique effect is compared the raising that existing technology has matter.

Utilize the single-chip microcomputer function, can increase the more detection more.Fuel injection quantity, air fuel ratio, temperature cylinder, exhaust gas composition concentration etc.These parameters more or less to the increase in demand modifying factor of ignition voltage, belong to the changes in demand factor to ignition voltage.Can increase wherein one or more factor of compensation.Correlation detecting circuit is referred to as the auxiliary detection circuit.The compensation of these factors is superpositions on existing ignition voltage, and prerequisite is the notice current actual ignition voltage in road or energy and and the state of equilibrium of current reality between required thereof.Even, experiment just needs this condition when obtaining relevant compensation model.As previously mentioned,, formed the constant pressure point ignition circuit, just can draw and implement the demand factor compensation model exactly owing to overcome the forming factors influence of rotating speed and cell voltage two big ignition energies.Through experiment obtain correlative factor required to ignition voltage compensation and and controlling element such as dutycycle between relational model, adding backoff algorithm in service, point of adjustment ignition voltage.This circuit arrangement is claimed constant voltage and multifactor compensation point ignition circuit.

Beneficial effect: isobaric booster circuit is the constant voltage booster circuit under certain cell voltage, constitutes the constant voltage ignitor circuit under the normal conditions.Solved existing CDI igniter, a great problem that ignition voltage is influenced by rotating speed.Circuit structure is simple, and reliability significantly improves, and performance is excellent.The igniter of being formed, it is simple to make debugging, and cost reduces, and normal temperature low temperature starts fast down,, senior middle school's low speed is stable, quickens strong.Control circuit can be accepted prime firing pulse and other signal of one to multiple road through shaping is provided.

The constant pressure point ignition circuit keeps these effects to a greater extent when cell voltage is on the low side.

Constant voltage and multifactor compensation point ignition circuit, each light-off period of control circuit (computer) all provides ignition voltage accurately according to engine operating condition, and degree of accuracy is higher than 7%.The size of existing direct current CDI ignition voltage is determined by igniter or seriously is limited by the technological critical defect of igniter to be able to eliminate basically.Ignition energy becomes according to engine operating condition provides definite amount as required, and motor becomes the active decision side of ignition voltage, makes the engine technology of continuous progress obtain corresponding firing technique cooperation.

It is good to start acceleration performance, and cold and hot startup is triggered at any moment, and senior middle school's low speed quickens fast down, cooperate with correct ignition advance angle, and powerful, engine sound is soft, and wear and tear in machines reduces, and average fuel-economizing 5% reduces discharging, more meets the new work engine technical requirements.

Because of ignition energy becomes according to engine operating condition definite amount is provided as required, is engine efficiency, emission performance provides highly effective technological means with the research of other roadabilitys and firing technique relation, helps the progress of motor and control technique thereof.

This case circuit is all applicable to all kinds of petrol engine or internal-combustion engine, adds can constitute automobile or motor cycle ignitor behind the required circuit or combine to constitute the ignition function circuit and obtain the described beneficial effect of this case with the automobile ECU circuit.

Description of drawings

Fig. 1, isopiestic point ignition circuit block diagram.

Fig. 2, equipressure and constant pressure point ignition circuit figure.

Fig. 3, constant voltage and multifactor compensation point ignition circuit figure that the band current limliting drives.

Fig. 4, fet switch constant voltage and multifactor compensation point ignition circuit figure.

Fig. 5, multiple cylinder engine constant voltage and multifactor compensation point ignition circuit figure.

Embodiment

Several instances are described with reference to the accompanying drawings:

Instance 1: see Fig. 2, a routine motorcycle isopiestic point ignition circuit and a routine constant pressure point ignition circuit.Single-chip microcomputer adopts PIC12F615, and its I/O mouth is that input/output port line function of use is flexible.Control circuit can be accepted compatible with single-chip microcomputer one to multiple road pulse signal or other signals, and shaping circuit before can be with reference to subsequent instance.GP2 accepts motorcycle shaping afterpulse signal among the figure, and GP0 is subsequent use, also can accept more engine signal or accept another habitual road pulse signal of existing technology.GP1 connects drive circuit, the output control signal.The energy output of the start and stop of this signal and the quick booster circuit of duty cycle adjustment.GP5 control ignition circuit.Single-chip microcomputer obtains motor and magnetogenerator movable information through GP2 from ignition pulse signal, except that obtaining fire signal, therefrom analyzes rotating speed and advance angle information.Make advance angle processing back single-chip microcomputer GP5 mouth and send fire signal, make the accumulator discharge,, implement igniting to high pressure packet joint output current through firing circuit.Booster circuit then charges to accumulator in good time fast.The formation and the working principle of booster circuit are fast: single-chip microcomputer GP1 mouth output control signal; Via drive circuit control electronic switch, this example is the break-make of TIP122, and the controlled end of TIP122 or base stage connect the output of drive circuit; Be diode D2; Power input end or the collector electrode of TIP122 connect primary, another elementary termination anode, and the power take-off of TIP122 is through sample resistance ground connection or direct ground connection.The high pressure terminating diode of transformer secondary output, ground end ground connection.The variation of GP1 output level through drive circuit make transformer B1 elementary connect battery intermittently and go out high-tension electricity at secondary induction charge to accumulator through diode D1.Accumulator savings electric energy or release electric energy.

Single-chip microcomputer is controlled the parameters such as start and stop and dutycycle of quick booster circuit boost conversion through drive circuit, through start and stop control and change the dutycycle of single-chip microcomputer to drive circuit output control signal, can regulate quick booster circuit output power on a large scale.In addition, single-chip microcomputer also can change the frequency of drive circuit output control signal, and changing frequency in case of necessity also can influence its power and improve operational efficiency.

Booster circuit has been given full play to the conversion efficiency of transformer fast; The transformer output voltage is high; Make charge rate and tank voltage high; Accumulator or storage capacitor voltage ascend curve are stable and can in 2-2.5ms, reach the 200V peak rapidly, and this peak and rise time can be through design adjustment up and down as required.Because storage capacitor rate of pressure rise enough height no longer rises after also reaching peak rapidly; The charge cycle length that causes because of rotation speed change is able to eliminate to the influence of storage capacitor voltage; Make ignition voltage and rotating speed irrelevant; Solved existing technology alternating direct-current igniter, a great problem that ignition voltage is influenced by rotating speed.The firing circuit of being formed under different rotating speeds and certain cell voltage, has constant ignition voltage, is called the isopiestic point ignition circuit, can form the constant pressure point firearm under the certain condition.But this firing circuit is when the cell voltage change is big, and tank voltage still has fluctuation.

Because tank voltage rises to the actual ignition cycle of peak needed time value less than engine producing, be energy-conservation and reduce device temperature rise meter, the opening time value of phase of can setting quick booster circuit weekly.If tank voltage reaches peak and needs 2.5ms, the then quick booster circuit opening time value of phase weekly can be decided to be 2.5ms or big slightly.Promptly the beginning and the end to this time value adjust control constantly, when this opening time is interpreted as corresponding engine revolution angle, control opening angle exactly, are similar to the angle of attachment in the inductance igniting.

The GP4 mouth is set to analog input; Battery detection circuit 4 is set detects the cell voltage partial pressure value; Regulate the dutycycle of GP1 output level or the operation duration of interior booster circuit of cycle according to the prior compensation model of confirming through experiment; Proofread and correct cell voltage and change influence, form motorcycle constant pressure point ignition circuit and can under different rotating speeds and cell voltage, keep the constant voltage igniting ignition voltage.Especially, this case changes the check point ignition voltage with cell voltage, and is different with the correction of existing technology.The influence factor of latter's cell voltage is not independently; Cell voltage influences the rule very big influence of rotating speed of originally experiencing to what accumulator voltage rose; And for being non-linear factor; Circuit performance is the bigger discreteness of tool again, make proofread and correct tool more greatly can not certainty, also be the jejune partly cause of existing technology ignition voltage correction technique.And this constant pressure point ignition circuit, according to before argumentation, cell voltage be independent and the influence factor of confirming, proofreaies and correct simply and accurate, just can accomplish with the computer method for correcting of tabling look-up.

Distinguishingly, when inadequate resource used, Battery check also can be used other circuit such as analog comparator etc., and analog comparator can be integrated in control circuit (single-chip microcomputer) or be individual devices.Be set to the analog comparator input end like Fig. 2 GP4, when cell voltage is lower than 10V, ignition voltage reduces more for a long time; Regulate dutycycle,, make ignition voltage improve 20-30% according to the correction data that obtain before; But compensation point ignition voltage deviation, the constant voltage performance of this method circuit decreases, but can be practical.

The constant pressure point ignition circuit, the igniter of making according to this, it is constant that 10-15V keeps ignition voltage in the rational mobility scale of cell voltage, then can significantly reduce fluctuation when being lower than 10V.Under low voltage, keep ignition voltage not reduce, when requiring under the battery nominal voltage, to work, quick booster circuit output power has more than needed, the cell voltage lower bound that the surplus capacity decision-making circuit keeps the constant voltage ignition energy to touch.

Instance 2: see Fig. 3, constant voltage and multifactor compensation point ignition circuit.The constant pressure point of this case non-indication ignition voltage of fighting is fixing immutable, and the basis of constant voltage igniting has been arranged just, can accomplish that ignition voltage follows engine operating condition exactly and change.As before discuss the principle of cell voltage compensation because the basic influence factor that ignition voltage is formed reduces and be independent, the compensation of influencing factors for demand is become easily, can be more accurate.With different factors such as fuel injection quantity, air fuel ratio, cylinder temperature, engine power or throttle position etc. combines, and can have better ignition voltage to regulate control, makes ignition energy be more suitable for operating mode.

Drive circuit adopts resistance and diode to drive; And resistance R 1 and the elementary maximum current of triode T1 limiting transformer have been increased; To reduce the tank voltage climbing speed and to reduce the device temperature rise, be applicable to different motor needs, also can exchange with the drive circuit of example 1.Distinguishingly, stronger current limliting reaches peak after can making voltage curve become the lower straight line of slope, also can further utilize in the cycle charging duration control to realize the constant voltage control of boosting to this.TIP122 with routine 1 changes TIP41 into and also has this effect, and its tank voltage ascend curve slope reduces, and becomes straight line until peak.When the tank voltage ascend curve becomes the mild slightly straight line of slope, can adopt the duration control of boosting in the light-off period to reach the effect that equipressure is boosted.This be because with ignition voltage as by the control aim parameter, become simple linear relation with controlled quentity controlled variable booster circuit operation duration, and it is fine respectively to make the conformity of part.

The auxiliary detection circuit is the summary of various influence factor testing circuits, can on a kind of circuit, dispose multiple.This example is made as cylinder (cylinder body) temperature sensing circuit.If this temperature cylinder sensor is a resistance type, its size to fixed voltage dividing potential drop output value is relevant with the temperature height, has reflected engine behavior, is one and requires the ignition energy of igniter that the operating mode of reacting factor is provided.The auxiliary detection circuit is connected with single-chip microcomputer Gp0 among each figure, and Gp0 need be set to the analog input mouth, utilizes the AD conversion function of single-chip microcomputer to detect the voltage analog value.Single-chip microcomputer detects temperature cylinder when higher or on the low side, all can make response.Because constant pressure point ignition circuit self can produce constant ignition voltage; When temperature cylinder higher; In the time of can suitably reducing ignition voltage; Can be exactly by before the compensation model that obtains make compensation, reduce ignition energy through reducing in control circuit signal dutyfactor or the light-off period booster circuit duration of boosting.Vice versa.Compensation under this compensation is disturbed than the non-independently a plurality of separately factors that influence tank voltage formation of existing technology more is of practical significance, and existing technology remakes multifactor correction on the big ignition voltage basis of deviation interrogatory shows.Above-mentioned compensation technique can reduce nitrogen oxide and unburning material and carbon monoxide emission effectively, and according to throttle position or acceleration point of adjustment ignition voltage, the energy-saving and emission-reduction meaning is arranged also.

Pulse shaping nework 1 in the example, is single channel input single channel output structure, and this be preferred, but the also pulse shaping nework exported of adapted two-way.Shaping triode among the figure also can be a phototriode..Multifactor target compensation detects, and the control circuit input mode should be decided according to the output signal of detecting sensor, or can be a formula signal port, I ²C mouth etc.Each example after all the other explanations are seen before.

Instance 3: Fig. 4, constant voltage and multifactor compensation point ignition circuit adopt the driving field effect transistor of low pressure (5V) to make switching tube, and be higher because of required switching frequency, needs to adopt diode and the switch motion of triode accelerating circuit, reduces the switching tube power consumption.The diode pair field effect transistor has been opened acceleration, and the shutoff of PNP triode ability acceleration switch pipe.Should adopt low-voltage driving type field effect transistor, consider that diode can reduce driving voltage, also can adopt germanium tube.If driving voltage is not enough, can inserts one-level and drive the raising driving voltage, each example after all the other explanations are seen before.

Instance 4: Fig. 5, motorcycle and automobile multiple cylinder engine constant voltage and multifactor compensation point ignition circuit.This example has adopted distributor, and has considered that the possible cylinder signal of declaring detects, and has increased pulse shaping nework 11.Auxiliary detection can have multichannel, also can adopt the stronger single-chip microcomputer of configuration.High power transistor (GTR); Darlington transistor, field effect transistor, IGBT switching tube all can adopt and make electronic switch; Can adopt or increase the circuit of acceleration switch pipe break-make when the IGBT heating is big among the figure; With the driving IGBT of low pressure (5V), this switching tube can exchange with the field effect transistor of Fig. 4, and drive circuit and Fig. 4 also can exchange.Each each local circuit of example of this case all can be used for reference each other.All the other explanations each example of seing before.

Claims

1. a petrol engine isopiestic point ignition circuit comprises control circuit (2), firing circuit (3); Accumulator (5) is characterized in that: also have drive circuit (7), fast booster circuit (8); This quick booster circuit comprises electronic switch (K1), transformer (B1), diode (D1); Said control circuit connects the control end and the said drive circuit of said firing circuit respectively, and the output terminal of said drive circuit connects the control end of said electronic switch, and said firing circuit also connects said accumulator; Said primary connects the power input end of battery and said electronic switch respectively;, the power take-off of this electronic switch is through the sample resistance ground connection or the direct ground connection of said drive circuit, an end ground connection of said transformer secondary output; The said diode of the other end termination, the other end of this diode connects said accumulator.

2. a petrol engine constant pressure point ignition circuit comprises control circuit (2), firing circuit (3); Accumulator (5) is characterized in that: also have battery detection circuit (4), drive circuit (7); Quick booster circuit (8), this quick booster circuit comprises electronic switch (K1), transformer (B1); Diode (D1), said control circuit connect control end and the said battery detection circuit and the said drive circuit of said firing circuit respectively, and the output terminal of said drive circuit connects the control end of said electronic switch; Said firing circuit also connects said accumulator, and said primary connects the power input end of battery and said electronic switch respectively; The power take-off of this electronic switch is through the sample resistance ground connection or the direct ground connection of said drive circuit; The ground end ground connection of said transformer secondary output, its high-voltage output end connects said diode, and the other end of this diode connects said accumulator.

3. a petrol engine constant voltage and multifactor compensation point ignition circuit comprise control circuit (2), firing circuit (3), accumulator (5); It is characterized in that: also have battery detection circuit (4), auxiliary detection circuit (9), drive circuit (7); Quick booster circuit (8), this quick booster circuit comprises electronic switch (K1), transformer (B1); Diode (D1), said control circuit connects the control end of said firing circuit respectively, said battery detection circuit; Said auxiliary detection circuit and said drive circuit, the output terminal of said drive circuit connects the control end of said electronic switch, and said firing circuit also connects said accumulator; Said primary connects the power input end of battery and said electronic switch respectively,, the power take-off of this electronic switch is through the sample resistance ground connection or the direct ground connection of said drive circuit; The ground end ground connection of said transformer secondary output, its high-voltage output end connects said diode, and the other end of this diode connects said accumulator.