CN103821625B - A kind of engine fuel injection control circuit and control method - Google Patents
A kind of engine fuel injection control circuit and control method Download PDFInfo
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- CN103821625B CN103821625B CN201410045788.8A CN201410045788A CN103821625B CN 103821625 B CN103821625 B CN 103821625B CN 201410045788 A CN201410045788 A CN 201410045788A CN 103821625 B CN103821625 B CN 103821625B
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Abstract
The invention provides a kind of engine fuel injection control circuit and control method: flow-limiting voltage-stabilizing circuit, one-way conduction circuit, accumulator and control circuit are connected successively, in the time of T15 switch open, T15 signal is high level, supply voltage exports accumulator to by one-way conduction circuit after flow-limiting voltage-stabilizing circuit is stabilized to predeterminated voltage scope, give the capacitor charging in accumulator, when the output voltage values of accumulator is during higher than conducting voltage, control circuit control oil spout master switch is opened; In the time that T15 switch cuts out, T15 signal is low level, the capacitor discharge in accumulator, the voltage of output declines gradually, when the output voltage values of accumulator is during lower than conducting voltage, control circuit control oil spout master switch cuts out, and realizes the control to engine oil spout. When single-chip microcomputer operation irregularity, cannot normally control ECU in the time that T15 switch cuts out and close time, circuit provided by the present invention can be closed oil spout master switch, makes engine stop work.
Description
Technical field
The present invention relates to automation field, particularly relate to a kind of engine fuel injection control circuit and controlMethod processed.
Background technology
In the engine of electric-control system, electronic control unit (ElectronicControlUnit, ECU)The core component that control engine runs well, the normal operation of control engine and closing. T15For controlling the enable signal of ECU work, T15 signal is detected by the single-chip microcomputer on ECU.
When T15 closes, the single-chip microcomputer on ECU detects that T15 is low level, controls ECU numberAccording to preservation and backup after quit work, after ECU quits work, engine also shuts down. Work as T15When unlatching, the single-chip microcomputer on ECU detects that T15 is high level, controls ECU and starts working, ECUAfter starting working, control engine runs well.
But in the time of single-chip microcomputer operation irregularity on ECU, single-chip microcomputer cannot detect T15 signal,Or even T15 signal detected, and cannot normally control ECU and quit work, will cause promptlyBraking causes braking abnormal while needing shutting theengine down, cause security incident.
Summary of the invention
In view of this, the invention provides a kind of engine fuel injection control circuit and control method, at T15When switch cuts out, accumulator is discharged to the conducting voltage of output voltage lower than control circuit, controls electricityRoad is controlled oil spout master switch and is closed, and realizes the braking to engine in the time of single-chip microcomputer operation irregularity.
A kind of engine fuel injection control circuit, described circuit comprises:
Flow-limiting voltage-stabilizing circuit, one-way conduction circuit, accumulator and control circuit are connected successively;
Described flow-limiting voltage-stabilizing circuit, in the time that T15 signal is high level, is stabilized to supply voltage defaultVoltage range output, to accumulator power supply, and by the electricity of output voltage range control energy-storage moduleCan;
Described one-way conduction circuit, by unidirectional the exporting to of electric current of voltage regulation of described flow-limiting voltage-stabilizing circuit outputAccumulator, and reverse cut-off current;
Described accumulator, in the time that T15 signal is high level, the capacitor charging in accumulator, fillsAfter full, electric energy is stabilized in default energy value, and the magnitude of voltage of output is stabilized in predeterminated voltage value; Work as T15When signal is low level, the electric capacity in accumulator discharges by discharge loop, the output of accumulatorVoltage declines gradually;
Described control circuit, for detection of the magnitude of voltage of accumulator output, when accumulator outputMagnitude of voltage during higher than conducting voltage, is controlled oil spout master switch and is opened; When the magnitude of voltage of accumulator outputDuring lower than conducting voltage, control oil spout master switch and close, accumulator is discharged to output voltage lower than leadingThe time delay that energising is pressed is greater than the time delay that Single-chip Controlling ECU closes.
Optionally, described circuit also comprises:
RC filter circuit, RC filter circuit enters supply voltage before being arranged on flow-limiting voltage-stabilizing circuitRow filtering, reduces the interference of supply voltage.
Optionally, described circuit also comprises:
Temperature-compensation circuit, temperature-compensation circuit is connected with control circuit with flow-limiting voltage-stabilizing circuit, compensationThe impact of variations in temperature on switching tube in electric capacity in accumulator and control circuit.
Optionally, described flow-limiting voltage-stabilizing circuit comprises:
Zener diode or voltage stabilizing chip.
Optionally, described accumulator comprises:
Storage capacitor and two discharge resistances, in the time that T15 signal is low level, storage capacitor andTwo discharge resistance composition discharge loops.
Optionally, described control circuit comprises:
Switching tube and not gate chip;
Switching tube detects the magnitude of voltage of accumulator output, when the magnitude of voltage of accumulator output is higher than leadingWhen energising is pressed, to not gate chip output high level, not gate chip output low level control oil spout master switchOpen; When the magnitude of voltage of accumulator output is during lower than conducting voltage, to not gate chip output low level,Not gate chip output high level control oil spout master switch cuts out.
A kind of engine fuel injection control method, described method comprises:
In the time that T15 switch is closed, it is defeated that supply voltage is stabilized to predeterminated voltage scope by flow-limiting voltage-stabilizing circuitGo out to one-way conduction circuit;
One-way conduction circuit is by the unidirectional electric current of voltage regulation accumulator that exports to, to the electric capacity in accumulatorCharging, the magnitude of voltage of described accumulator output constantly increases, until the electric energy in accumulator is stableIn default energy value, output voltage stabilization is in predeterminated voltage value;
The magnitude of voltage that control circuit detects accumulator output during higher than conducting voltage, is controlled oil spout totalSwitch open;
In the time that T15 switch cuts out, the electric capacity in accumulator discharges by discharge loop, accumulatorOutput voltage decline gradually;
The magnitude of voltage that control circuit detects accumulator output during lower than conducting voltage, is controlled oil spout totalSwitch cuts out, and accumulator is discharged to output voltage and is greater than Single-chip Controlling lower than the time delay of conducting voltageThe time delay that ECU closes.
Optionally, described method also comprises:
RC filter circuit carries out filtering to supply voltage, exports filtered supply voltage to current limliting steadyVolt circuit.
Optionally, described method also comprises:
Temperature-compensation circuit compensates is to the switch in electric capacity and control circuit in accumulatorThe impact of pipe.
As shown in the above, the present invention has following beneficial effect:
The invention provides a kind of engine fuel injection control circuit and control method, described circuit comprises:Flow-limiting voltage-stabilizing circuit, one-way conduction circuit, accumulator and control circuit are connected successively, work as T15When switch open, T15 signal is high level, and supply voltage is stabilized to default through flow-limiting voltage-stabilizing circuitAfter voltage range, export accumulator to by one-way conduction circuit, give the capacitor charging in accumulator,And by the electric energy of output voltage range control energy-storage module, the output voltage values of accumulator increases graduallyGreatly, when the output voltage values of accumulator is during higher than conducting voltage, control circuit control oil spout master switchOpen, the electric energy being full of in rear accumulator is stabilized in default energy value, and the voltage stabilization of output is in advanceIf magnitude of voltage; In the time that T15 switch cuts out, T15 signal is low level, and the electric capacity in accumulator is putElectricity, the voltage of output declines gradually, when the output voltage values of accumulator is during lower than conducting voltage, controlCircuit control oil spout master switch processed cuts out, and realizes the control to engine oil spout. Wherein, accumulatorElectric capacity start to discharge into and be discharged to accumulator output voltage lower than the time delays between conducting voltageBe greater than the time delay that Single-chip Controlling ECU closes, that is to say, as single-chip microcomputer operation irregularity, Wu FaWhen T15 switch cuts out, normal control ECU closes, circuit provided by the present invention can be closed oil spoutMaster switch, makes engine stop work.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will be to implementingIn example or description of the Prior Art, the accompanying drawing of required use is briefly described, and apparently, the following describesIn accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not payingGo out under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of engine fuel injection control circuit of the present invention embodiment mono-structural representation;
Fig. 2 is a kind of engine fuel injection control circuit of the present invention embodiment mono-specific implementation circuit diagram;
Fig. 3 is a kind of engine fuel injection control circuit of the present invention filtering compensation structural representation;
Fig. 4 is a kind of engine fuel injection control circuit of the present invention filtering compensation specific implementation circuit diagram;
Fig. 5 is a kind of engine fuel injection control method of the present invention embodiment bis-flow charts.
Detailed description of the invention
The invention provides a kind of engine fuel injection control circuit and control method, close at T15 switchTime, accumulator is discharged to the conducting voltage of output voltage lower than control circuit, control circuit control sprayOil master switch cuts out, and in the time of single-chip microcomputer operation irregularity, realizes and killing engine.
Below in conjunction with accompanying drawing, the embodiment of the present invention is specifically described.
Embodiment mono-
Fig. 1 is a kind of engine fuel injection control circuit of the present invention embodiment mono-structural representation, described electricityRoad comprises:
Flow-limiting voltage-stabilizing circuit 101, one-way conduction circuit 102, accumulator 103 and control circuit104 are connected successively.
Described flow-limiting voltage-stabilizing circuit 101, in the time that T15 signal is high level, is stabilized to supply voltageThe output of predeterminated voltage scope, to accumulator power supply, and by output voltage range control energy-storage moduleElectric energy.
Described flow-limiting voltage-stabilizing circuit 101 is connected with T15 switch, and T15 switch is connected with power supply, works as T15When switch is closed, T15 signal is high level, exports supply voltage to flow-limiting voltage-stabilizing circuit 101. LimitStream mu balanced circuit 101 is stabilized in supply voltage in preset range and exports. Supply voltage generally existsBetween 9V～32V, fluctuate, flow-limiting voltage-stabilizing circuit 101 can be stabilized in supply voltage between 8V～9V,Eliminate the unstable impact to the set delay time of accumulator of supply voltage. Flow-limiting voltage-stabilizing circuit 101The predeterminated voltage scope of output determines the electric energy that accumulator can be stored.
Wherein, flow-limiting voltage-stabilizing circuit 101 comprises Zener diode or voltage stabilizing chip. As shown in Figure 2,What in the embodiment of the present invention, flow-limiting voltage-stabilizing circuit 101 adopted is Zener diode 201.
Described one-way conduction circuit 102, the electric current of voltage regulation list that described flow-limiting voltage-stabilizing circuit 101 is exportedTo exporting accumulator 103 to, and reverse cut-off current, guarantee that accumulator is according to set electric dischargeLoop electric discharge.
The electric current of voltage regulation that one-way conduction circuit 102 is exported flow-limiting voltage-stabilizing circuit 101 exports energy storage electricity toRoad 103, and realize reverse cut-off current. The function of the reverse cut-off current of one-way conduction circuit 102Be mainly the discharge current that oppositely ends accumulator 103, realize accumulator 103 by setDischarge loop electric discharge, discharge current can not oppositely export flow-limiting voltage-stabilizing circuit 101 to, ensures to discharge backThe uniqueness on road, accurately controlled discharge time.
What as shown in Figure 2, in the embodiment of the present invention, one-way conduction circuit 102 adopted is diode 202.
Described accumulator 103, in the time that T15 signal is high level, the electric capacity in accumulator 103Charging, is full of rear electric energy and is stabilized in default energy value, and the magnitude of voltage of output is stabilized in predeterminated voltage value; WhenWhen T15 signal is low level, the electric capacity in accumulator 103 discharges by discharge loop, energy storage electricityThe output voltage on road 103 declines gradually.
In the time that T15 switch is closed, T15 signal is high level, and the electric capacity in accumulator 103 startsCharging, the voltage at accumulator 103 two ends increases gradually, when the electric capacity in accumulator 103 is full ofAfter, the electric energy in electric capacity is stabilized in default energy value, and the output voltage stabilization of accumulator 103 is in advanceIf magnitude of voltage.
The electric energy that in accumulator 103, electric capacity is stored can be set voluntarily according to actual conditions, with electricityThe relating to parameters holding, the electric energy of capacitance stores is more, is discharged to prolonging of conducting voltage from starting to discharge intoShi Yuechang, that is to say, by the parameter of the electric capacity in accumulator 103 is set, can control storageThe discharge lag of energy circuit 103.
As shown in Figure 2, accumulator 103 comprises storage capacitor 203 and two discharge resistances 204With 205, in the time that T15 signal is low level, storage capacitor 203 and two discharge resistance 204 Hes205 composition discharge loops.
In the time that T15 switch cuts out, T15 signal is low level, the storage capacitor in accumulator 103203 start electric discharge, and storage capacitor 203 and two discharge resistances 204 and 205 are connected to form successivelyDischarge loop, two discharge resistances 204 are connected with storage capacitor 203 with 205 one end, another terminationGround. In storage capacitor 203, the electric energy of storage is by 204 and 205 electric discharges of two discharge resistances, energy storageCircuit 103 output voltages decline gradually.
In the time that T15 switch disconnects, T15 signal is low level, and the electric capacity in accumulator 103 passes throughDischarge loop electric discharge, the output voltage of accumulator 103 declines gradually. Discharge loop one end ground connection,One end is connected with the electric capacity of accumulator 103.
Described control circuit 104, the magnitude of voltage of exporting for detection of accumulator 103, when energy storage electricityThe magnitude of voltage that export on road 103 during higher than conducting voltage, is controlled oil spout master switch and is opened; Work as accumulatorThe magnitudes of voltage of 103 outputs during lower than conducting voltage, are controlled oil spout master switch and are closed, accumulator 103Be discharged to output voltage and be greater than lower than the time delay of conducting voltage the time delay that Single-chip Controlling ECU closes.
Control circuit 104 is for controlling the opening and closing of oil spout master switch, and control circuit 104 detectsThe output voltage of accumulator 103, in the time that T15 switch is closed, accumulator 103 charges, outputVoltage constantly increases, when the output voltage of accumulator 103 is higher than the conducting voltage of control circuit 104Time, control circuit 104 is controlled oil spout master switch and is opened, engine commencement of fuel injection; When T15 switch breaksWhile opening, accumulator 103 starts electric discharge, and output voltage constantly reduces, defeated when accumulator 103While going out voltage lower than the conducting voltage of control circuit 104, control circuit 104 is controlled oil spout master switch and is closedClose engine stop oil spout.
In the time that T15 switch cuts out, T15 signal is low level, the capacitor discharge of accumulator 103,The voltage of accumulator output reduces gradually, accumulator 103 from start to be discharged to output voltage lower thanThe time delay of the conducting voltage of control circuit 104 is greater than the time delay that Single-chip Controlling ECU closes.
When single-chip microcomputer operation irregularity, uncontrollable ECU closes, and then uncontrollable engine stop workWhile work, because accumulator 103 is from starting to be discharged to the conducting of output voltage lower than control circuit 104The time delay of voltage is greater than the time delay that Single-chip Controlling ECU closes, a kind of engine provided by the present inventionFuel injection control circuit can be controlled oil spout master switch and close, thus engine stop oil spout, and control is startedMachine quits work. For control engine is when the brake hard, control engine quits work to be provided into oneStep ensures, the security that improves automatically controlled locomotive.
Wherein, as shown in Figure 2, described control circuit 104 comprises switching tube 206 and not gate chip 207.
Switching tube 206 detects the magnitude of voltage that accumulator 103 is exported, when accumulator 103 is exportedMagnitude of voltage during higher than conducting voltage, is exported high level to not gate chip 207, and not gate chip 207 is exportedLow level control oil spout master switch is opened; The magnitude of voltage of exporting when accumulator 103 is lower than conducting voltageTime, to not gate chip 207 output low levels, not gate chip 207 is exported high level control oil spout and is always openedPass is closed. Wherein, switching tube 206 adopts triode.
In practical application of the present invention, as shown in Figure 3, engine fuel injection control circuit also comprises RCFilter circuit 301. Before RC filter circuit 301 is arranged on flow-limiting voltage-stabilizing circuit 101, to power supply electricityCompress into row filtering, reduce the interference of supply voltage.
In practical application of the present invention, as shown in Figure 3, engine fuel injection control circuit also comprises temperatureCompensating circuit 302, temperature-compensation circuit 302 and flow-limiting voltage-stabilizing circuit 101 and control circuit 104 phasesConnect the impact of compensates on switching tube in electric capacity in accumulator and control circuit. Temperature is mendedRepay the voltage model that circuit control flow-limiting voltage-stabilizing voltage adapts according to variations in temperature output and variations in temperatureEnclose, ensure the not temperature influence of electric energy stored of accumulator, guarantee accumulator discharge lagAccurately controlled.
Fig. 4 is the physical circuit schematic diagram that comprises RC filter circuit 301 and temperature-compensation circuit 302.Wherein, temperature-compensation circuit 302 is the conventional temperature-compensating being made up of multiple triodes or CMOSNetwork.
As shown in the above, the present invention has following beneficial effect:
The invention provides a kind of engine fuel injection control circuit and control method, described circuit comprises:Flow-limiting voltage-stabilizing circuit, one-way conduction circuit, accumulator and control circuit are connected successively, work as T15When switch open, T15 signal is high level, and supply voltage is stabilized to default through flow-limiting voltage-stabilizing circuitAfter voltage range, export accumulator to by one-way conduction circuit, the capacitor charging in accumulator,The output voltage values of accumulator increases gradually, when the output voltage values of accumulator is higher than conducting voltageTime, control circuit control oil spout master switch is opened, and the electric energy being full of in rear accumulator is stabilized in defaultEnergy value, the voltage stabilization of output is in predeterminated voltage value; In the time that T15 switch cuts out, T15 signal isLow level, the capacitor discharge in accumulator, the voltage of output declines gradually, defeated when accumulatorWhile going out magnitude of voltage lower than conducting voltage, control circuit control oil spout master switch cuts out, and realizes engineThe control of oil spout. Wherein, the electric capacity of accumulator starts to discharge into and is discharged to accumulator output voltageBe greater than lower than the time delays between conducting voltage the time delay that Single-chip Controlling ECU closes, that is to say,When single-chip microcomputer operation irregularity, cannot normally control ECU in the time that T15 switch cuts out and close time, the present inventionThe circuit providing can be closed oil spout master switch, makes engine stop work.
Embodiment bis-
Fig. 5 is a kind of engine fuel injection control method of the present invention embodiment bis-flow charts, is and described electricityThe corresponding method in road, described method comprises:
Step 501: in the time that T15 switch is closed, flow-limiting voltage-stabilizing circuit is stabilized to supply voltage defaultVoltage range exports one-way conduction circuit to.
T15 switch closure, supply voltage is stabilized in output valve list between 8V～9V by flow-limiting voltage-stabilizing circuitTo turning circuit.
Step 502: one-way conduction circuit is by the unidirectional electric current of voltage regulation accumulator that exports to, to energy storage electricityCapacitor charging in road, the magnitude of voltage of described accumulator output constantly increases, until in accumulatorElectric energy be stabilized in default energy value, output voltage stabilization is in predeterminated voltage value.
When T15 switch is closed, one-way conduction circuit is by single-phase the electric current of voltage regulation of flow-limiting voltage-stabilizing circuit outputExport accumulator to, give the capacitor charging of accumulator, output voltage constantly increases. AccumulatorElectric capacity while being full of electricity, electric energy is stabilized in default energy value, output voltage stabilization is in predeterminated voltage value.The storable electric energy of electric capacity in accumulator and the relating to parameters of electric capacity, the electric energy that electric capacity is stored moreMany, the time delay of capacitor discharge is longer, thereby the parameter control energy storage electricity of electric capacity can be set as requiredThe discharge lag on road.
Step 503: the magnitude of voltage that control circuit detects accumulator output is during higher than conducting voltage,Controlling oil spout master switch opens.
When the output voltage of accumulator is during higher than conducting voltage, the switching tube of control circuit is opened, controlThe not gate chip output low level of circuit processed, controls oil spout master switch and opens, and engine is started working.
Step 504: in the time that T15 switch cuts out, the electric capacity in accumulator discharges by discharge loop,The output voltage of accumulator declines gradually.
In the time that T15 switch cuts out, the electric capacity of accumulator starts to discharge by discharge loop, unidirectionalCircuit passband prevents that discharge current from oppositely flowing into flow-limiting voltage-stabilizing circuit, the output voltage of accumulator gradually underFall.
Step 505: the magnitude of voltage that control circuit detects accumulator output is during lower than conducting voltage,Control oil spout master switch and close, accumulator is discharged to output voltage and is greater than lower than the time delay of conducting voltageThe time delay that Single-chip Controlling ECU closes.
When the output voltage of accumulator is during lower than the conducting voltage of the switching tube of control circuit, not gate coreSheet output high level, controls oil spout master switch and closes, and engine stop oil spout, realizes control engineQuit work.
In actual applications, described method also comprises that RC filter circuit carries out filtering to supply voltage,Export filtered supply voltage to flow-limiting voltage-stabilizing circuit.
Described method also comprises that employing temperature-compensation circuit compensates is to the electric capacity in accumulatorImpact with the switching tube in control circuit.
The conducting voltage of the switching tube in electric energy and control circuit that the electric capacity in accumulator is storedTemperature influence is larger, and the temperature-compensation circuit of setting and accumulator and switching tube is used for compensatingThe impact of the electric energy that variations in temperature is stored electric capacity and the conducting voltage of switching tube. Improve a kind of sending outThe control accuracy of motivation fuel injection control circuit, reduces the impact of environment temperature on control accuracy.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, allWithin the spirit and principles in the present invention, any amendment of doing, be equal to replacement, improvement etc., all should wrapWithin being contained in protection scope of the present invention.
Claims (9)
1. an engine fuel injection control circuit, is characterized in that, described circuit comprises:
Flow-limiting voltage-stabilizing circuit, one-way conduction circuit, accumulator and control circuit are connected successively;
Described flow-limiting voltage-stabilizing circuit, in the time that T15 signal is high level, is stabilized to supply voltage defaultVoltage range output, to accumulator power supply, and by the electricity of output voltage range control energy-storage moduleCan;
Described one-way conduction circuit, by unidirectional the exporting to of electric current of voltage regulation of described flow-limiting voltage-stabilizing circuit outputAccumulator, and reverse cut-off current;
Described accumulator, in the time that T15 signal is high level, the capacitor charging in accumulator, fillsAfter full, electric energy is stabilized in default energy value, and the magnitude of voltage of output is stabilized in predeterminated voltage value; Work as T15When signal is low level, the electric capacity in accumulator discharges by discharge loop, the output of accumulatorVoltage declines gradually;
Described control circuit, for detection of the magnitude of voltage of accumulator output, when accumulator outputMagnitude of voltage during higher than conducting voltage, is controlled oil spout master switch and is opened; When the magnitude of voltage of accumulator outputDuring lower than conducting voltage, control oil spout master switch and close, accumulator is discharged to output voltage lower than leadingThe time delay that energising is pressed is greater than the time delay that Single-chip Controlling ECU closes.
2. circuit according to claim 1, is characterized in that, described circuit also comprises:
RC filter circuit, RC filter circuit enters supply voltage before being arranged on flow-limiting voltage-stabilizing circuitRow filtering, reduces the interference of supply voltage.
3. circuit according to claim 1, is characterized in that, described circuit also comprises:
Temperature-compensation circuit, temperature-compensation circuit is connected with control circuit with flow-limiting voltage-stabilizing circuit, compensationThe impact of variations in temperature on switching tube in electric capacity in accumulator and control circuit.
4. according to the circuit described in claim 1-3 any one, it is characterized in that, described current limliting is steadyVolt circuit comprises:
Zener diode or voltage stabilizing chip.
5. according to the circuit described in claim 1-3 any one, it is characterized in that described energy storage electricityRoad comprises:
Storage capacitor and two discharge resistances, in the time that T15 signal is low level, storage capacitor andTwo discharge resistance composition discharge loops.
6. according to the circuit described in claim 1-3 any one, it is characterized in that described control electricityRoad comprises:
Switching tube and not gate chip;
Switching tube detects the magnitude of voltage of accumulator output, when the magnitude of voltage of accumulator output is higher than leadingWhen energising is pressed, to not gate chip output high level, not gate chip output low level control oil spout master switchOpen; When the magnitude of voltage of accumulator output is during lower than conducting voltage, to not gate chip output low level,Not gate chip output high level control oil spout master switch cuts out.
7. an engine fuel injection control method, is characterized in that, described method comprises:
In the time that T15 switch is closed, it is defeated that supply voltage is stabilized to predeterminated voltage scope by flow-limiting voltage-stabilizing circuitGo out to one-way conduction circuit;
One-way conduction circuit is by the unidirectional electric current of voltage regulation accumulator that exports to, to the electric capacity in accumulatorCharging, the magnitude of voltage of described accumulator output constantly increases, until the electric energy in accumulator is stableIn default energy value, output voltage stabilization is in predeterminated voltage value;
The magnitude of voltage that control circuit detects accumulator output during higher than conducting voltage, is controlled oil spout totalSwitch open;
In the time that T15 switch cuts out, the electric capacity in accumulator discharges by discharge loop, accumulatorOutput voltage decline gradually;
The magnitude of voltage that control circuit detects accumulator output during lower than conducting voltage, is controlled oil spout totalSwitch cuts out, and accumulator is discharged to output voltage and is greater than Single-chip Controlling lower than the time delay of conducting voltageThe time delay that ECU closes.
8. method according to claim 7, is characterized in that, described method also comprises:
RC filter circuit carries out filtering to supply voltage, exports filtered supply voltage to current limliting steadyVolt circuit.
9. method according to claim 8, is characterized in that, described method also comprises:
Temperature-compensation circuit compensates is to the switch in electric capacity and control circuit in accumulatorThe impact of pipe.
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| CN201410045788.8A CN103821625B (en) | 2014-02-08 | 2014-02-08 | A kind of engine fuel injection control circuit and control method |
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| CN201410045788.8A CN103821625B (en) | 2014-02-08 | 2014-02-08 | A kind of engine fuel injection control circuit and control method |
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| CN103821625B true CN103821625B (en) | 2016-05-11 |
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| CN110243606B (en) * | 2019-06-28 | 2021-04-16 | 潍柴动力股份有限公司 | Control device of oil quantity metering unit |
| CN111142502A (en) * | 2019-12-30 | 2020-05-12 | 潍柴动力股份有限公司 | Processing method, device and equipment for ECU detection and storage medium |
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| CN103180588A (en) * | 2010-11-03 | 2013-06-26 | 罗伯特·博世有限公司 | Method for operating a magnetic switching element |
| CN103016227A (en) * | 2012-12-04 | 2013-04-03 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Electromagnetic valve driving device capable of carrying out online regulation |
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