CN209658984U

CN209658984U - EFI engine hand pull starting-up low energy consumption automatic power system

Info

Publication number: CN209658984U
Application number: CN201920715632.4U
Authority: CN
Inventors: 辜礼勇
Original assignee: Chongqing Zongshen General Power Machine Co Ltd
Current assignee: Chongqing Zongshen General Power Machine Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2019-11-19
Anticipated expiration: 2029-05-16

Abstract

The utility model relates to EFI engine hand pull starting-up low energy consumption automatic power systems, including generator charging power circuit and battery.The first electronic switch and control the first biasing circuit for constituting first electronic switch that one is made of switch power triode or field-effect tube are in series in charging power source circuit, the charge and discharge delay circuit for controlling the control electrode level of the switch power triode or field-effect tube is additionally provided in first biasing circuit, first biasing circuit is battery powered, and first bias circuit controls constitute the switch power triode of first electronic switch or the control electrode of field-effect tube.By above-mentioned setting, it can reach and manually boot battery power supply, and maintain the time of setting, avoid since battery is powered for a long time in existing power supply system, electric energy excessive consumption leads to the problem of the routed electricity of battery.

Description

EFI engine hand pull starting-up low energy consumption automatic power system

Technical field

The utility model relates to a kind of EFI engine power supply system, especially a kind of EFI engine hand pull starting-up low energy Consume automatic power system.

Background technique

EFI engine is using electronic control unit, by various sensors by the temperature, air-fuel ratio, throttle of engine The signals such as situation, the revolving speed of engine, load, crank position situation input electronic control unit, electronic control unit (ECU) root According to these signal parameters, calculates and control distributive value and oil injection time required for each cylinder of engine, by gasoline in a level pressure It is injected in air inlet pipe and is atomized by fuel injector under power, and mixed with the air draught of entrance, into combustion chambers burn, burning is more Add thoroughly, black smoke it is less, fuel efficiency is higher, so that it is guaranteed that engine and catalytic converter always work in optimum state, because This electronic control unit gradually replaces traditional mechanical system (such as carburetor) to control the Fuel injection system of engine, leads to machine at present Also electric jet technology is gradually used.The advantages that general small-size gasoline engine is small in size, light-weight, cheap, easy to use due to its, It is used widely in various plants are mating.As agricultural equipment for plant protection, small farm machine, graden machine, generating set, Building machinery, outboard machinery etc..But existing common EFI engine needs to keep the power supply of ECU and fuel feeding pumping system for a long time, Lead to battery power excessive consumption, and cause the problem of the routed electricity of battery, shortens the service life of battery.

Summary of the invention

The purpose of this utility model is that in order to overcome the deficiencies of the prior art and provide it is a kind of can on demand the short time be ECU and The EFI engine electric power supply control system of oil feed pump system power supply, to extend the service life of battery.

In order to achieve the above object, the utility model discloses a kind of EFI engine hand pull starting-up low energy consumption automatic powers System, it is characterised in that: including generator charging power circuit and battery, the positive and negative both ends of the battery and generator charging electricity The positive and negative both ends of source circuit output are separately connected to form cathode output end and cathode output end in parallel, the cathode output end structure At power supply cathode output end, it is in series with one on the cathode output end and is made of switch power triode or field-effect tube The first electronic switch, for the other end of first electronic switch as power supply cathode output end, the ECU is connected to institute It states on power supply cathode output end and power supply cathode output end；The automatic power system is additionally provided with described in control composition The switch power triode of first electronic switch or the first biasing circuit of field-effect tube conduction and cut-off, first biased electrical The charge and discharge delay circuit for controlling the control electrode level of the switch power triode or field-effect tube, generator are additionally provided in road Output provides charge power supply for charge and discharge delay circuit, and first biasing circuit is battery powered, first biasing circuit Control constitutes the switch power triode of first electronic switch or the control electrode of field-effect tube.

The utility model is in series with one in power supply access and is made of switch power triode or field-effect tube First electronic switch, and the switch power triode equipped with control composition first electronic switch or field-effect tube are connected/cut The first biasing circuit only is additionally provided with the control switch power triode or field-effect tube in first biasing circuit The charge and discharge delay circuit of control electrode level, first biasing circuit are battery powered, the first bias circuit controls structure At the switch power triode of first electronic switch or the control electrode of field-effect tube.By above-mentioned setting, can reach manually Start battery power supply, and maintain the time of setting, avoids since battery is powered for a long time in existing power supply system, electric energy is excessive Consumption leads to the problem of the routed electricity of battery.

As the further setting of the utility model, the generator charging power circuit includes that sequentially connected decompression is whole It flows unit and direct-flow voltage regulation unit, the step-down rectifier unit includes sequentially connected charge coil, the first rectifier diode D1 And the half-wave rectifying circuit that filter capacitor is constituted, the direct-flow voltage regulation unit are made of switching power source chip U1 and its peripheral circuit DC-DC step-down switching power supply circuit constitute, the cathode output end of the direct-flow voltage regulation unit constitutes the output of power supply anode End；First electronic switch is made of N-channel MOS switching tube Q8, the cathode output of the DC-DC step-down switching power supply circuit End is connect with the source electrode of MOS switch pipe Q8, and the drain electrode of the MOS switch pipe Q8 constitutes the power supply cathode output end；Institute Stating the first biasing circuit includes that the first amplifying triode Q9 and the second amplifying triode Q10, the first amplifying triode Q9 is Positive-negative-positive switching transistor, the second amplifying triode Q10 are NPN type switching transistor, the first amplifying triode Q9's Emitter is connect with power supply cathode output end, and the collector of the first amplifying triode Q9 passes through the first current-limiting resistance R32 and the second current-limiting resistance R31 are connect with the gate pole of the MOS switch pipe Q8, the base stage of the first amplifying triode Q9 with Biasing resistor R33 on first, the collector warp of the second amplifying triode Q10 are connected between power supply cathode output end It crosses the first below-center offset resistance R34 to connect with the base stage of the first amplifying triode Q9, the emitter of the second amplifying triode Q10 It is connect with the source electrode for the MOS switch pipe Q8 for constituting first electronic switch, the charge and discharge delay circuit is by delay capacitor C10 It is constituted with the parallel branch of discharge resistance R37, the cathode output end of charge and discharge delay circuit one end and direct-flow voltage regulation unit Connection, the other end are connect by the first base resistance R36 with the base stage of the second amplifying triode Q10, the charge coil Output end connect with the other end of the charge and discharge delay circuit by the second isolating diode D7 and provides charge power supply.

As the further setting of the utility model, the automatic power system is additionally provided with charging overvoltage protection circuit, The charging overvoltage protection circuit includes being connected on direct-flow voltage regulation unit cathode output end and power supply cathode output end access In the second electronic switch and the second biasing circuit, second electronic switch is by switch power triode or field-effect tube structure At；It include that control constitutes second electronic switch by switch power triode or field-effect tube in second biasing circuit First zener diode DZ2 of conduction and cut-off, second biasing circuit are supplied by the out-put supply of generator charging power circuit Electricity, the second biasing circuit output control constitute the switch power triode of second electronic switch or the control of field-effect tube The turning-on voltage of pole processed, the first zener diode DZ2 limits conducting voltage upper limit threshold.

As the further setting of the utility model, second electronic switch is made of P-channel MOS switch pipe Q7, The drain electrode of the MOS switch pipe Q7 constitutes the power supply cathode output end；Second biasing circuit includes the 5th amplification Triode Q3 and the 6th amplifying triode Q2, the 5th amplifying triode Q3 and the 6th amplifying triode Q2 are NPN type switch The collector of triode, the 5th amplifying triode Q3 by the 4th current-limiting resistance R24 and constitutes second electronic switch P-channel MOS switch pipe Q7 gate pole connection, the collector of the 6th amplifying triode Q2 passes through third base resistance R22 It is connect with the base stage of the 5th amplifying triode Q3, the collector of the 6th amplifying triode Q2 passes through the 5th partial pressure simultaneously The cathode output end of resistance R20 and direct-flow voltage regulation unit connects and composes biasing, the collector of the 6th amplifying triode Q2 Below-center offset is connected and composed by the source electrode of the 6th divider resistance R23 and the MOS switch pipe Q8 for constituting first electronic switch, institute The emitter of the emitter and the 6th amplifying triode Q2 of stating the 5th amplifying triode Q3, which is connected to, constitutes first electronic cutting On the source electrode of the MOS switch pipe Q8 of pass, the base stage of the 6th amplifying triode Q2 by the first zener diode DZ2 and 4th current-limiting resistance R19 is connect with the cathode output end of the direct-flow voltage regulation unit, the anode output of the direct-flow voltage regulation unit End is connect by third isolating diode D2 with the source electrode for the P-channel MOS switch pipe Q7 for constituting second electronic switch.

After charging overvoltage protection circuit further is arranged in the automatic power system, when the pressure stabilizing of direct-flow voltage regulation unit Disabler and cause overtension be more than preset value when, charging overvoltage protection circuit can disconnect in time to battery charging charging Circuit avoids cell damage.

As the further setting of the utility model, the automatic power system is additionally provided with battery low-voltage protection circuit, The battery low-voltage protection circuit includes third biasing circuit, includes the control third biasing in the third biasing circuit Circuit conducting the second zener diode DZ3, the third biasing circuit and the first biasing circuit formation line or relationship it is common Control constitutes the switch power triode of first electronic switch or the control electrode of field-effect tube, second zener diode The turning-on voltage of DZ3 limits lower battery voltage threshold value.

As the further setting of the utility model, the third biasing circuit includes third amplifying triode Q5 and Four amplifying triode Q4, the third amplifying triode Q5 and the 4th amplifying triode Q4 are NPN type switching transistor, described the The collector and emitter of three amplifying triode Q5 is connected to the company of the first current-limiting resistance R32 and the second current-limiting resistance R31 On the source electrode of the MOS switch pipe Q8 of contact and composition first electronic switch, the collector of the 4th amplifying triode Q4 It is connect by the second base resistance R29 with the base stage of the third amplifying triode Q5, the hair of the 4th amplifying triode Q4 Emitter-base bandgap grading is connected on the source electrode for constituting the MOS switch pipe Q8 of first electronic switch, the collection of the 4th amplifying triode Q4 The first divider resistance R28 is parallel between electrode and emitter, the ac charging power supply of the generator charging power circuit is defeated It is connect out by the second rectifier diode D5 and the second divider resistance R27 with the second base resistance R29, the power supply anode Third divider resistance R25 and two pole of the second pressure stabilizing are connected between output end and the base stage of the 4th amplifying triode Q4 The upper biasing branch that the series arm of pipe DZ3 is constituted, the base stage and composition first electronics of the 4th amplifying triode Q4 The below-center offset branch of the 4th divider resistance R26 composition is connected between the source electrode of the MOS switch pipe Q8 of switch；The battery is just Cathode both ends are connected to the power supply cathode output end and constitute the MOS switch pipe Q8's of first electronic switch On source electrode.

After battery low-voltage protection circuit is further arranged in the automatic power system, when to cross baselap excessively pre- for cell voltage If battery low-voltage protection circuit can disconnect power supply of the battery to ECU in time when value, to prevent battery long-time overdischarge from damaging Battery.

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Detailed description of the invention

Attached drawing 1 is 1 circuit diagram of the utility model specific embodiment；

Attached drawing 2 is 2 circuit diagram of the utility model specific embodiment；

Attached drawing 3 is 3 circuit diagram of the utility model specific embodiment；

Attached drawing 4 is 4 circuit diagram of the utility model specific embodiment.

Specific embodiment

The utility model EFI engine hand pull starting-up low energy consumption automatic power system include generator charging power circuit, Battery, the first electronic switch and control constitute the switch power triode or field-effect tube conduction and cut-off of the first electronic switch First biasing circuit.The positive and negative both ends of the battery are separately connected to be formed with the positive and negative both ends that generator charging power circuit exports Cathode output end and cathode output end in parallel, the cathode output end constitute power supply cathode output end, and the cathode is defeated The first electronic switch being made of described in connecting in outlet switch power triode or field-effect tube, first electronic switch The other end is as power supply cathode output end, the ECU(electronic control unit) it is connected to the power supply anode output On end and power supply cathode output end.

The control electrode level for controlling the switch power triode or field-effect tube is additionally provided in first biasing circuit Charge and discharge delay circuit, first biasing circuit is battery powered, and generator output provides for charge and discharge delay circuit fills Power supply, first biasing circuit are battery powered, and first bias circuit controls constitute first electronic switch The control electrode of switch power triode or field-effect tube.The effect of first biasing circuit is required after engine start, Charge coil has electricity output, and the first biasing circuit exports three pole of switch power that corresponding level controls first electronic switch The control electrode (gate pole) of pipe or field-effect tube, so that the conducting of the first electronic switch reaches to the ECU(electronic control unit) it supplies Electricity.

First biasing circuit and the engine output detection circuit, can be according to specifically setting there is no specific limitation Meter requires setting, as long as can satisfy above-mentioned requirements.As shown in Figure 1, in this specific embodiment, the generator charging electricity Source circuit includes sequentially connected step-down rectifier unit and direct-flow voltage regulation unit, what the step-down rectifier unit issued engine Alternating voltage is down to suitable amplitude and is rectified into direct current, then exports stable DC source by direct-flow voltage regulation unit.Its In, the step-down rectifier unit includes sequentially connected charge coil, the first rectifier diode D1 and filter capacitor C1 and C2 structure At half-wave rectifying circuit；The direct-flow voltage regulation unit is depressured by the DC-DC that switching power source chip U1 and its peripheral circuit form Switching power circuit is constituted, and the mature prior art specifically can be used, commercial product can be selected in switching power source chip U1, described straight The cathode output end for flowing voltage regulation unit constitutes power supply cathode output end；In this specific embodiment, the direct-flow voltage regulation unit Output end be equipped with the partial pressure being made of divider resistance R1 and R2 and sample branch, divider resistance R1 and R2 is by direct-flow voltage regulation unit Sampled signal FB after output voltage partial pressure feeds back to switching power source chip U1, sets when the output voltage of direct-flow voltage regulation unit is higher than When definite value (13V), signal SW is to reduce PWM duty cycle for switching power source chip U1 output control, to reduce voltage；Conversely, working as When the output voltage of direct-flow voltage regulation unit is lower than setting value (13V), signal SW is to increase PWM for switching power source chip U1 output control Duty ratio achievees the purpose that burning voltage exports to improve voltage.

In this specific embodiment, first electronic switch is made of N-channel MOS switching tube Q8, and the DC-DC decompression is opened The cathode output end of powered-down source circuit (direct-flow voltage regulation unit) is connect with the source electrode of MOS switch pipe Q8, the MOS switch pipe Q8's Drain electrode constitutes the power supply cathode output end；First biasing circuit includes the amplification of the first amplifying triode Q9 and second Triode Q10, the first amplifying triode Q9 are positive-negative-positive switching transistor, and the second amplifying triode Q10 is NPN type The switching transistor that switching transistor, preferably pressure drop are small, switching speed is fast.The emitter of the first amplifying triode Q9 and confession Electric positive pole output end connection, the collector of the first amplifying triode Q9 is by the limit of the first current-limiting resistance R32 and second Leakage resistance R31 connect with the gate pole (i.e. the control electrode of the first electronic switch) of the MOS switch pipe Q8 and opens to control the MOS The level for closing the gate pole of pipe Q8 is connected with the between the base stage and power supply cathode output end of the first amplifying triode Q9 Biasing resistor R33 constitutes the upper biasing of the first amplifying triode Q9, the collector of the second amplifying triode Q10 on one It is connected and composed under the first amplifying triode Q9 by the base stage of the first below-center offset resistance R34 and the first amplifying triode Q9 The source electrode of biasing, the MOS switch pipe Q8 of the emitter and composition first electronic switch of the second amplifying triode Q10 connects It connects, the charge and discharge delay circuit is made of delay capacitor C10 and the parallel branch of discharge resistance R37, and delay time is by described Delay capacitor C10 and the first base resistance R36, the time constant of discharge resistance R37 are determining；Charge and discharge delay circuit one end It is connect with the cathode output end of direct-flow voltage regulation unit, the other end is by the first base resistance R36 and second amplifying triode The base stage of Q10 connects, and the charge coil output end is by this of the second isolating diode D7 and the charge and discharge delay circuit Other end connection provides charge power supply, i.e. generator output is described by charge coil output end and the second isolating diode D7 Charge and discharge delay circuit provides charge power supply.

The working principle of this EFI engine hand pull starting-up low energy consumption automatic power system is as follows:

After EFI engine hand pull starting-up low energy consumption automatic power system, when engine work has voltage output When (i.e. charge coil has electricity), generator charging coil can generate alternating current, and charge coil output end exports electric current and passes through second Isolating diode D7 charges to delay capacitor C10, and delay capacitor C10 both end voltage is charged to and the both ends discharge resistance R37 after about 1s Voltage is equal, and after delay capacitor C10 both end voltage is higher than 0.7V, the second amplifying triode Q10 conducting, described second is put Big triode Q10 is connected so that the base stage of the first amplifying triode Q9 has electric current to flow through, then the first amplifying triode Q9 is connected, because And the MOS switch pipe Q8 conducting of the first electronic switch is constituted, battery powers to ECU by MOS switch pipe Q8.(EFI engine Hand pull starting-up low energy consumption automatic power system start when, directly manually pull pulling plate, if for the first time pull pulling plate when starting not at Function needs within delay time, and second of pulling pulling plate pulls the time not exceed maximum duration, Zhi Daofa twice Until motivation starts successfully.

When engine is without revolving speed, generator charging coil does not generate alternating current, and charge coil output end no current is defeated Out, delay capacitor C10 is discharged by discharge resistance R37, the first base resistance R36 and triode Q10, delay capacitor C10 electric discharge It is set as about needing 16s to 0.7V, when delay capacitor C10 both end voltage is lower than 0.7V and engine does not have voltage output (i.e. Charge coil is without electricity) when, the second amplifying triode Q10 cut-off, the base stage no current of the first amplifying triode Q9 flows through, the One amplifying triode Q9 cut-off, thus the MOS switch pipe Q8 stopping of the first electronic switch is constituted, power supply circuit is disconnected, Stop powering to ECU.

Charging voltage is excessively high in order to prevent, causes to damage battery, on the basis of above-mentioned specific embodiment, as The further setting of the utility model, the automatic power system are preferably also provided with charging overvoltage protection circuit.As shown in Fig. 2, In the specific embodiment being further arranged, the charging overvoltage protection circuit includes being connected on direct-flow voltage regulation unit cathode output end With the second electronic switch and the second biasing circuit in power supply cathode output end access, second electronic switch is by switching Pliotron or field-effect tube are constituted；It include that control constitutes second electronic switch by opening in second biasing circuit The first zener diode DZ2 of pliotron or field-effect tube conduction and cut-off is closed, second biasing circuit is filled by generator The out-put supply of electric power circuit is powered, and the second biasing circuit output control constitutes the switch function of second electronic switch The turning-on voltage of the control electrode of rate triode or field-effect tube, the first zener diode DZ2 limits conducting voltage upper limit threshold Value.

In this specific embodiment, second electronic switch is made of P-channel MOS switch pipe Q7, the MOS switch pipe Q7 Drain electrode constitute the power supply cathode output end.Second biasing circuit includes that the 5th amplifying triode Q3 and the 6th is put Big triode Q2, the 5th amplifying triode Q3 and the 6th amplifying triode Q2 is NPN type switching transistor, and the described 5th puts The collector of big triode Q3 is by the 4th current-limiting resistance R24 and P-channel MOS switch pipe Q7 for constituting second electronic switch Gate pole connection to control the on or off of MOS switch pipe Q7, the collector of the 6th amplifying triode Q2 passes through third Base resistance R22 is connect with the base stage of the 5th amplifying triode Q3, and the collector of the 6th amplifying triode Q2 is simultaneously Upper biasing, three poles of the 6th amplification are connected and composed by the cathode output end of the 5th divider resistance R20 and direct-flow voltage regulation unit The collector of pipe Q2 is connect by the 6th divider resistance R23 with the source electrode for the MOS switch pipe Q8 for constituting first electronic switch Below-center offset is constituted, the emitter of the 5th amplifying triode Q3 and the emitter of the 6th amplifying triode Q2, which are connected to, constitutes institute It states on the source electrode of MOS switch pipe Q8 of the first electronic switch, the base stage of the 6th amplifying triode Q2 is steady by described first Pressure diode DZ2 and the 4th current-limiting resistance R19 is connect with the cathode output end of the direct-flow voltage regulation unit, the DC voltage-stabilizing list The cathode output end of member is by the third isolating diode D2's and P-channel MOS switch pipe Q7 for constituting second electronic switch Source electrode connection.

When reduction voltage circuit fails, the output voltage of the DC-DC step-down switching power supply circuit (direct-flow voltage regulation unit) is higher than When setting value (such as 15V passes through the first zener diode DZ2 of the different pressure stabilizing values of selection, the adjustable setting value), described the One zener diode DZ2 is by electric current, the 6th amplifying triode Q2 conducting, thus the 5th amplifying triode Q3 ends, structure At the MOS switch pipe Q7 stopping of the second electronic switch, to not charge to battery when guaranteeing overtension.When voltage is lower than When setting value, the obstructed overcurrent of the first zener diode DZ2, the 6th amplifying triode Q2 cut-off, and the 5th three poles of amplification Pipe Q3 conducting constitutes the MOS switch pipe Q7 conducting of the second electronic switch, to normally charge the battery.

It still powers to ECU when cell voltage is too low in order to prevent, causes to damage battery, in any of the above-described specific reality On the basis of applying example, as the further setting of the utility model, the automatic power system is additionally provided with battery low-voltage variation electricity Road.It is equipped with battery low-voltage protection circuit on the basis of specific embodiment 1, may be constructed the hand with battery low-voltage variation function Starting low energy consumption automatic power system is drawn, as shown in Figure 3；Battery low-voltage protection circuit is equipped on the basis of specific embodiment 2, It may be constructed while having the hand pull starting-up low energy consumption automatic power system of battery low-voltage variation and charging overvoltage protection function.

The battery low-voltage protection circuit includes third biasing circuit, includes described in control in the third biasing circuit Third biasing circuit conducting the second zener diode DZ3, the third biasing circuit and the first biasing circuit formation line or Relationship co- controlling constitutes the switch power triode of first electronic switch or the control electrode of field-effect tube, and described second is steady The turning-on voltage of diode DZ3 is pressed to limit lower battery voltage threshold value.

As shown in Figure 3,4, as in the specific embodiment being further arranged, the third biasing circuit includes third amplification Triode Q5 and the 4th amplifying triode Q4, the third amplifying triode Q5 and the 4th amplifying triode Q4 are NPN type switch Triode, the collector and emitter of the third amplifying triode Q5 are connected to the limit of the first current-limiting resistance R32 and second On the source electrode of the MOS switch pipe Q8 of the tie point and composition first electronic switch of leakage resistance R31, three poles of the 4th amplification The collector of pipe Q4 is connect by the second base resistance R29 with the base stage of the third amplifying triode Q5, the 4th amplification The emitter of triode Q4 is connected on the source electrode for constituting the MOS switch pipe Q8 of first electronic switch, the 4th amplification The first divider resistance R28, the friendship of the generator charging power circuit are parallel between the collector and emitter of triode Q4 The output of current charge power supply is connect by the second rectifier diode D5 and the second divider resistance R27 with the second base resistance R29, described Third divider resistance R25 and described is connected between power supply cathode output end and the base stage of the 4th amplifying triode Q4 The upper biasing branch that the series arm of second zener diode DZ3 is constituted, the base stage and composition of the 4th amplifying triode Q4 The below-center offset branch of the 4th divider resistance R26 composition is connected between the source electrode of the MOS switch pipe Q8 of first electronic switch； The positive and negative end of the battery is connected to the power supply cathode output end and constitutes first electronic switch On the source electrode of MOS switch pipe Q8.

When cell voltage is lower than setting value (such as 7v), the second zener diode DZ3 cannot be connected and no current, and described the Four amplifying triode Q4 cut-off, on the third amplifying triode Q5 without influence.When engine work has voltage output (i.e. Charge coil has electricity) when, the DC-DC step-down switching power supply circuit (direct-flow voltage regulation unit) exports direct voltage of voltage regulation, direct current Electricity passes through the second rectifier diode D5, the second divider resistance R27 and the second base resistance R29, third amplifying triode Q5 base stage There are electric current inflow, third amplifying triode Q5 conducting, thus constitute the MOS switch pipe Q8 stopping of the first electronic switch, supplies Circuit is disconnected, and battery cannot power to ECU, to prevent battery long-time overdischarge from damaging battery；When cell voltage height When 7V, the second zener diode DZ3 has electric current, the 4th amplifying triode Q4 conducting, and third amplifying triode Q5 ends, At this point, when engine work has voltage output (i.e. charge coil has electricity), the DC-DC step-down switching power supply circuit (direct-flow voltage regulation unit) exports direct voltage of voltage regulation, constitutes the MOS switch pipe Q8 conducting of the first electronic switch, and battery is normally right ECU power supply.

The above embodiments are only the preferred embodiment of the utility model, and the right of the utility model cannot be limited with this Range, therefore, equivalent variations made according to the patent scope of the utility model are still fallen within the scope of the utility model.

Claims

1. a kind of EFI engine hand pull starting-up low energy consumption automatic power system, it is characterised in that: including generator charging power supply The positive and negative both ends of circuit and battery, the positive and negative both ends of the battery and the output of generator charging power circuit are separately connected to be formed simultaneously The cathode output end and cathode output end of connection, the cathode output end constitute power supply cathode output end, the cathode output First electronic switch being made of switch power triode or field-effect tube is in series on end, first electronic switch The other end is as power supply cathode output end, and ECU is connected to the power supply cathode output end and power supply cathode is defeated In outlet；The automatic power system is additionally provided with switch power triode or the field-effect that control constitutes first electronic switch First biasing circuit of pipe conduction and cut-off is additionally provided with the control switch power triode or field in first biasing circuit The charge and discharge delay circuit of the control electrode level of effect pipe, generator output provide charge power supply for charge and discharge delay circuit, institute It states the first biasing circuit to be battery powered, first bias circuit controls constitute the switch power three of first electronic switch The control electrode of pole pipe or field-effect tube.

2. EFI engine hand pull starting-up low energy consumption automatic power system according to claim 1, it is characterised in that: described Generator charging power circuit includes sequentially connected step-down rectifier unit and direct-flow voltage regulation unit, the step-down rectifier unit packet Include the half-wave rectifying circuit that sequentially connected charge coil, the first rectifier diode and filter capacitor are constituted, the DC voltage-stabilizing The DC-DC step-down switching power supply circuit that unit is made of switching power source chip and its peripheral circuit is constituted, the DC voltage-stabilizing list The cathode output end of member constitutes power supply cathode output end；First electronic switch is made of N-channel MOS switching tube, institute The source electrode of the cathode output end and MOS switch pipe of stating DC-DC step-down switching power supply circuit connects, the drain electrode of the MOS switch pipe Constitute the power supply cathode output end；First biasing circuit includes the first amplifying triode and the second three poles of amplification Pipe, first amplifying triode are positive-negative-positive switching transistor, and second amplifying triode is NPN type switching transistor, institute The emitter for stating the first amplifying triode is connect with power supply cathode output end, the collector warp of first amplifying triode It crosses the first current-limiting resistance and the second current-limiting resistance is connect with the gate pole of the MOS switch pipe, the base of first amplifying triode Biasing resistor on first is connected between pole and power supply cathode output end, the collector of second amplifying triode passes through First below-center offset resistance is connect with the base stage of the first amplifying triode, described in the emitter and composition of second amplifying triode The source electrode of the MOS switch pipe of first electronic switch connects, the charge and discharge delay circuit by delay capacitor and discharge resistance and Join branch to constitute, the cathode output end of charge and discharge delay circuit one end and direct-flow voltage regulation unit connects, and the other end is by the One base resistance is connect with the base stage of second amplifying triode, and the charge coil output end passes through the second isolating diode It is connect with the other end of the charge and discharge delay circuit and charge power supply is provided.

3. EFI engine hand pull starting-up low energy consumption automatic power system according to claim 2, it is characterised in that: described Automatic power system is additionally provided with charging overvoltage protection circuit, and the charging overvoltage protection circuit includes being connected on direct-flow voltage regulation unit Cathode output end and the second electronic switch and the second biasing circuit in power supply cathode output end access, second electronics Switch is made of switch power triode or field-effect tube；It include that control constitutes second electricity in second biasing circuit Sub switch by switch power triode or the first zener diode of field-effect tube conduction and cut-off, second biasing circuit by The out-put supply of generator charging power circuit is powered, and the second biasing circuit output control constitutes second electronic switch Switch power triode or field-effect tube control electrode, the turning-on voltage of first zener diode limits in conducting voltage Limit threshold value.

4. EFI engine hand pull starting-up low energy consumption automatic power system according to claim 3, it is characterised in that: described Second electronic switch is made of P-channel MOS switch pipe, and the drain electrode of the MOS switch pipe constitutes the power supply anode output End；Second biasing circuit includes the 5th amplifying triode and the 6th amplifying triode, the 5th amplifying triode and the Six amplifying triodes are NPN type switching transistor, and the collector of the 5th amplifying triode passes through the 4th current-limiting resistance and structure At the gate pole connection of the P-channel MOS switch pipe of second electronic switch, the collector of the 6th amplifying triode is by the Three base resistances are connect with the base stage of the 5th amplifying triode, and the collector of the 6th amplifying triode passes through the simultaneously The cathode output end of five divider resistances and direct-flow voltage regulation unit connects and composes biasing, the collector of the 6th amplifying triode Below-center offset is connected and composed by the source electrode of the 6th divider resistance and the MOS switch pipe for constituting first electronic switch, described the The emitter of the emitter of five amplifying triodes and the 6th amplifying triode, which is connected to, to be constituted the MOS of first electronic switch and opens On the source electrode for closing pipe, the base stage of the 6th amplifying triode is by first zener diode and the 4th current-limiting resistance and institute The cathode output end connection of direct-flow voltage regulation unit is stated, the cathode output end of the direct-flow voltage regulation unit passes through third isolating diode It is connect with the source electrode for the P-channel MOS switch pipe for constituting second electronic switch.

5. EFI engine hand pull starting-up low energy consumption automatic power system according to claim 1, it is characterised in that: described Automatic power system is additionally provided with battery low-voltage protection circuit,

The battery low-voltage protection circuit includes third biasing circuit, includes the control third in the third biasing circuit Biasing circuit conducting the second zener diode, the third biasing circuit and the first biasing circuit formation line or relationship it is common Control constitutes the switch power triode of first electronic switch or the control electrode of field-effect tube, second zener diode Turning-on voltage limit lower battery voltage threshold value.

6. EFI engine hand pull starting-up low energy consumption automatic power system according to claim 5, it is characterised in that: described Third biasing circuit includes third amplifying triode and the 4th amplifying triode, and the third amplifying triode and the 4th amplify three Pole pipe is NPN type switching transistor, and the collector and emitter of the third amplifying triode is connected to the first current limliting electricity On the source electrode of the MOS switch pipe of the tie point and composition first electronic switch of resistance and the second current-limiting resistance, the described 4th is put The collector of big triode is connect by the second base resistance with the base stage of the third amplifying triode, the 4th amplification three The emitter of pole pipe is connected on the source electrode for the MOS switch pipe for constituting first electronic switch, the 4th amplifying triode Collector and emitter between be parallel with the first divider resistance, the ac charging power supply of the generator charging power circuit is defeated Connect out by the second rectifier diode and the second divider resistance with the second base resistance, the power supply cathode output end and The series arm of third divider resistance and second zener diode is connected between the base stage of 4th amplifying triode The upper biasing branch constituted, the MOS switch pipe of the base stage and composition first electronic switch of the 4th amplifying triode The below-center offset branch of the 4th divider resistance composition is connected between source electrode；The positive and negative end of the battery is connected to described On the source electrode of the MOS switch pipe of power supply cathode output end and composition first electronic switch.