CN108223164A - A kind of high-pressure common rail bavin engine fuel injector driving circuit and control method - Google Patents
A kind of high-pressure common rail bavin engine fuel injector driving circuit and control method Download PDFInfo
- Publication number
- CN108223164A CN108223164A CN201611154110.9A CN201611154110A CN108223164A CN 108223164 A CN108223164 A CN 108223164A CN 201611154110 A CN201611154110 A CN 201611154110A CN 108223164 A CN108223164 A CN 108223164A
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- Prior art keywords
- circuit
- fuel injector
- driving circuit
- flash
- control
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- 239000000446 fuel Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 15
- 239000000295 fuel oil Substances 0.000 claims description 9
- 230000001052 transient effect Effects 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2051—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit using voltage control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2068—Output circuits, e.g. for controlling currents in command coils characterised by the circuit design or special circuit elements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A kind of composition of high-pressure common rail bavin engine fuel injector driving circuit includes lightning protection circuit, high-frequency filter circuit, flash driving circuit, low side driving circuit, current acquisition feedback circuit.Fuel injector control is the core of high pressure co-rail diesel engine management system, and the response speed of the opening and closing of fuel injector directly determines the precision of oil spout, and the precision of oil spout directly affects engine power, stability and service life.Proposed by the present invention is a kind of design method of fuel injector device driving circuit, according to solenoid valve inherent characteristic to swashing electric current by force and being kept for the intensity of electric current or duration are adjusted, while realizing that fuel flow accurately controls, power consumption, the service life for extending solenoid valve can be also reduced.It has the characteristics that precision is high, stability is good, control signal is simple.Wherein output circuit is mainly made of floating grid driver, MOSFET pipes, and feedback circuit is made of sampling resistor, operational amplifier and bleeder circuit, and the present invention employs the control of fuel injector magnetic system a kind of closed loop thought.
Description
Technical field
The technical field of the invention is controlled for fuel injector magnetic system.
Background technology
In order to meet increasingly strict emission regulation demands, the high pressure as the 3rd leap during diesel engine development is total to
Rail fuel injection technology has made modern diesel engine enter new high-tech product field.High-pressure common rail technology can not only promote direct-injection
Engine power performance and fuel economy, while improve emission performance.This requires spy of the common-rail injector with high-speed response
Sign, and its high-speed response characteristic is realized by the special designing of solenoid valve.
Invention content
The purpose of the invention is to realize the accurate control to fuel injector.According to solenoid valve inherent characteristic to swashing electric current by force
And kept for the intensity of electric current or duration are adjusted, while realizing that fuel flow accurately controls, it can also reduce work(
Consumption, the service life for extending solenoid valve.
To achieve these goals, technical scheme is as follows：
1st, a kind of control method of high-pressure common rail bavin engine fuel injector driving circuit, includes the following steps：
Step 1：The ETPU units of CPU, which generate, provides initial fuel injection signal pwm control signal, is decoded by fuel oil chip,
The high pressure fuel injector pulse of generation and normal voltage fuel injection pulse signal, by floating grid driver, for controlling flash metal-oxide-semiconductor
V3 and V4 conductings, the output terminal of V3 are connected by a diode with V4 output terminals, ensure that 24V power supplys and the output of 50V power supplys
It is independent of each other, floating grid driver ensures that the voltage of metal-oxide-semiconductor grid and source electrode is more than cut-in voltage；Resistance R3, R4 to 24V and
The electric current of 50V power supplys is acquired, and whether monitoring power supply output services are normal；R5, R6 and V7 realization export back flash
Around acquisition, it is compared with control output signal and realizes high side switches driving circuit self-checking function；The anode of V6 is connected to the ground,
Cathode is connected with high side switches output, realizes afterflow protective effect.
Step 2:High pressure co-rail diesel engine fuel injector flash exports and the input of low side is connected to high-frequency filter circuit, passes through
The high frequency filter of L1, C1 and C2 composition is crossed, the high radiation field in input signal can be resisted, realizes and inside chip is protected
Shield.
Step 3：The input/output terminal connection electrostatic discharge protection circuit of fuel injector, when there is transient state in the input signal of fuel injector end
During high-pressure electrostatic interference signal, transient state inhibits pipe V10 conductings, realizes the lightning protection function to late-class circuit.
Step 4：The negative loop of fuel injector passes through metal-oxide-semiconductor V8, and half-bridge drive circuit is formed with flash driving Collaborative Control,
It is only opened simultaneously in flash driving circuit and low side driving circuit, fuel injector could work；The circuit ensures that fuel injector will not
There is accidentally opening action, damage engine, wherein V9 anodes are connected to metal-oxide-semiconductor drain electrode, and cathode is connected to 50V, in order to avoid in fuel injector
Induced electromotive force breakdown metal-oxide-semiconductor is generated when closed, plays afterflow protective effect.
Step 5：Sampling resistor is connected between fuel injector loop control circuit metal-oxide-semiconductor and ground, by acquiring sampling resistor
Electric current, filtered amplification, will treated that result is divided into 2 tunnels is connected to fuel oil chip, it is to realize that oil spout circuit is strong
It hits electric current and maintains current control in defined range.
2nd, a kind of high-pressure common rail bavin engine fuel injector driving circuit, the engine fuel injector driving circuit composition include
Lightning protection circuit, high-frequency filter circuit, flash driving circuit, low side driving circuit, current acquisition feedback circuit；The thunder and lightning
Protection circuit is made of transient state suppression circuit, realizes the lightning protection to circuit；The high-frequency filter circuit and lightning protection
Circuit connects, and can carry out High frequency filter to the signal of input, inhibiting effect is played to high high radiation field；The flash driving circuit
Ensure to ensure fuel injector normal power supply in the case where 50V and 24V power supplys are connected；The low side driving circuit cooperation flash driving circuit is total to
It is opened with control fuel injector；The current acquisition feedback circuit is passed through the fuel injector electric current of acquisition by acquiring fuel injector electric current
Filter and amplification is crossed, is sent into fuel oil chip.
The effect of the present invention can pass through following 5 points of explanations：
Pipe is inhibited to realize quiet protection using transient state, High frequency filter is realized using inductance and capacitor combination, can inhibit engine
The interference signal of upper complex work environment.
Using high side switches driving circuit and the control fuel injector work of low side driving switch driving circuit, it can be ensured that fuel injector
It only opens correct at the time of, ensures that engine is not damaged.
It employs and source current is acquired, output acquisition of unrolling guarantees whether to work normally circuit progress effectively
Monitoring.
Using when being opened to oil spout with higher voltage, when maintaining using normal working voltage simultaneously using than relatively low
Electric current, it can be ensured that fuel injector opens and closes rapidly.
Increase diode in the output terminal of fuel injector and circuit, it can be ensured that high pressure sensitivity is generated when fuel injector opens and closes
Electromotive force is answered to play afterflow clamper, inside chip is protected not to be damaged.
Description of the drawings
Fig. 1 is the current waveform of quick electromagnetic valve control signal；
Fig. 2 is fuel injector flash driving circuit figure；
Fig. 3 is designing circuitry diagram；
Fig. 4 is the low side driving circuit figure of fuel injector；
Fig. 5 is current acquisition feedback circuit figure；
Fig. 6 is lightning protection circuit hardware schematic diagram；
Fig. 7 is high-frequency filter circuit hardware elementary diagram.
Fig. 8 is control oscillogram
Specific embodiment
With reference to practical application of the circuit in certain high-pressure electronic controller project, the reality of this circuit is specifically explained
Apply mode and using effect.
Certain type electronic controller has delivered user's use, and control fast electromagnetic valve circuit meets the operation is stable, reliable, can
To realize the accurate control of current waveform.
CYD_IJ is that ETPU modules provide initial fuel injection control signal in CPU, is generated after fuel oil chip processing
BOOST_IJ (high pressure fuel injector pulse) and POW_IJ (normal voltage fuel injection pulse) signal, for controlling flash metal-oxide-semiconductor V3 and V4.
Flash metal-oxide-semiconductor is used for controlling the oil spout electric current of fuel injector.CYD_RT is generated by fuel oil chip and returns line control signal, for controlling
Low side metal-oxide-semiconductor V3.High pressure fuel injector controls signal and normal fuel injector control signal to control the anode of solenoid valve after diode.
In solenoid valve opening procedure, high pressure fuel injector signal is first begin to work, high after line solenoid valve loop current rises to certain value
Pressure fuel injection signal is stopped, while normal fuel injection signal is started to work, until end of injection.In the process, corresponding time
Line control signal CYD_RT continuously effectives during oil spout.During solenoid valve is opened, electricity is sampled in loop line control circuit
The electric current of certain value is flowed through in resistance, when the electric current is more than the threshold value of internal hysteresis loop comparator, internal hysteresis loop comparator turns over
Turn, when the circuital current is less than the threshold value of internal hysteresis loop comparator, internal hysteresis loop comparator is overturn, and finally generates PWM
The high speed of wave control solenoid valve opens and closes, and solenoid valve is allowed to keep smaller and constant electric current, reduces the power consumption of circuit, simultaneously
Protection device will not overheat.
Control waveform as shown in Figure 8, CYD_IJ is the initial fuel injection signal that CPU is provided, and is produced after fuel oil chip processing
Raw high-pressure injection BOOST_IJ and normal injection POW_IJ main control signals.IJ_VOL is high pressure pilot injection and main injection signal
Line or, the as voltage of solenoid valve upper end, when two signals are simultaneously high, IJ_VOL is high-voltage signal 50V；It is quick to open
Afterwards, IJ_VOL is normal power voltage 24V.IJ_CUR is electric current of the solenoid valve in course of injection, is sprayed in initial high pressure
The electric current rises very rapidly up to peak point current I_PULL in journey, and the electric current is in the variation of pwm pulse after high-pressure injection
The process of existing charging and discharging, is maintained near I_HOLD, the electric current of solenoid valve is made to maintain than in relatively low range.
Claims (2)
1. a kind of control method of high-pressure common rail bavin engine fuel injector driving circuit：It is characterized in that：Include the following steps：
Step 1：The ETPU units of CPU, which generate, provides initial fuel injection signal pwm control signal, decodes, generates by fuel oil chip
High pressure fuel injector pulse and normal voltage fuel injection pulse signal, by floating grid driver, for control flash metal-oxide-semiconductor V3 and
V4 is connected, and the output terminal of V3 is connected by a diode with V4 output terminals, ensure that 24V power supplys and the output of 50V power supplys mutually not
It influences, floating grid driver ensures that the voltage of metal-oxide-semiconductor grid and source electrode is more than cut-in voltage；Resistance R3, R4 is to 24V and 50V
The electric current of power supply is acquired, and whether monitoring power supply output services are normal；R5, R6 and V7 are realized unroll adopting to flash output
Collection is compared with control output signal and realizes high side switches driving circuit self-checking function；The anode of V6 is connected to the ground, cathode
It is connected with high side switches output, realizes afterflow protective effect；
Step 2:High pressure co-rail diesel engine fuel injector flash exports and the input of low side is connected to high-frequency filter circuit, passes through
The high frequency filter of L1, C1 and C2 composition, can resist the high radiation field in input signal, realize and inside chip is protected
Shield；
Step 3：The input/output terminal connection electrostatic discharge protection circuit of fuel injector, when there is high voltage transient in the input signal of fuel injector end
During electrostatic interference signal, transient state inhibits pipe V10 conductings, realizes the lightning protection function to late-class circuit；
Step 4：The negative loop of fuel injector passes through metal-oxide-semiconductor V8, forms half-bridge drive circuit with flash driving Collaborative Control, only
It is opened simultaneously in flash driving circuit and low side driving circuit, fuel injector could work；The circuit ensures that fuel injector is not in
Accidentally opening action damages engine, and wherein V9 anodes are connected to metal-oxide-semiconductor drain electrode, and cathode is connected to 50V, in order to avoid closed in fuel injector
Induced electromotive force breakdown metal-oxide-semiconductor is generated when closing, plays afterflow protective effect；
Step 5：Sampling resistor is connected between fuel injector loop control circuit metal-oxide-semiconductor and ground, by the electricity for acquiring sampling resistor
Stream, filtered amplification, will treated that result is divided into 2 tunnels is connected to fuel oil chip, to realize oil spout circuit attack electricity
Stream and maintenance current control are in defined range.
2. a kind of high-pressure common rail bavin engine fuel injector driving circuit, it is characterised in that：The engine fuel injector driving circuit
Composition includes lightning protection circuit, high-frequency filter circuit, flash driving circuit, low side driving circuit, current acquisition feedback circuit；
The lightning protection circuit is made of transient state suppression circuit, realizes the lightning protection to circuit；The high-frequency filter circuit with
Lightning protection circuit connects, and can carry out High frequency filter to the signal of input, inhibiting effect is played to high high radiation field；The flash
Driving circuit ensures to ensure fuel injector normal power supply in the case where 50V and 24V power supplys are connected；The low side driving circuit cooperation flash drives
Dynamic circuit co- controlling fuel injector is opened；The current acquisition feedback circuit is by acquiring fuel injector electric current, by the oil spout of acquisition
The filtered amplification of device electric current is sent into fuel oil chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154110.9A CN108223164A (en) | 2016-12-14 | 2016-12-14 | A kind of high-pressure common rail bavin engine fuel injector driving circuit and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611154110.9A CN108223164A (en) | 2016-12-14 | 2016-12-14 | A kind of high-pressure common rail bavin engine fuel injector driving circuit and control method |
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| Publication Number | Publication Date |
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| CN108223164A true CN108223164A (en) | 2018-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611154110.9A Pending CN108223164A (en) | 2016-12-14 | 2016-12-14 | A kind of high-pressure common rail bavin engine fuel injector driving circuit and control method |
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| CN (1) | CN108223164A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236533A (en) * | 2018-07-13 | 2019-01-18 | 天津理工大学 | A kind of adaptive multi-purpose vehicle(MPV) fuel injector drive system |
| CN110219758A (en) * | 2019-06-03 | 2019-09-10 | 柳州源创电喷技术有限公司 | Electromagnetic type injector drive circuit system |
| CN110748428A (en) * | 2019-11-22 | 2020-02-04 | 无锡职业技术学院 | Oil sprayer driving circuit |
| CN111075608A (en) * | 2019-10-15 | 2020-04-28 | 陈其安 | Electric control carburetor for small fuel engine |
| CN113565661A (en) * | 2021-07-23 | 2021-10-29 | 武汉天富海科技发展有限公司 | Electromagnetic valve drive control device of intelligent electric control booster pump |
| CN113848858A (en) * | 2021-09-29 | 2021-12-28 | 广西玉柴机器股份有限公司 | High-precision low-delay MEUN valve current acquisition method |
| CN113882948A (en) * | 2021-11-04 | 2022-01-04 | 上海海能汽车电子有限公司 | Controller for multi-cylinder diesel engine |
| CN114087080A (en) * | 2021-11-18 | 2022-02-25 | 镇江昌宏测控技术有限公司 | Piezoelectric crystal/electromagnetic type high-pressure common rail oil injector universal control circuit |
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| CN105571710A (en) * | 2015-12-11 | 2016-05-11 | 中国航空工业集团公司西安航空计算技术研究所 | Acquisition circuit of airborne vibration signals of engine |
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| DE102013101918A1 (en) * | 2012-02-28 | 2013-08-29 | Denso Corporation | Fuel injection system for injecting fuel in machine , particularly internal combustion engine, of vehicle, has multiple sensors which are received in injectors and are electrically connected with controller over multiple circuits |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109236533A (en) * | 2018-07-13 | 2019-01-18 | 天津理工大学 | A kind of adaptive multi-purpose vehicle(MPV) fuel injector drive system |
| CN109236533B (en) * | 2018-07-13 | 2021-02-26 | 天津理工大学 | An Adaptive Multifunctional Vehicle Fuel Injector Drive System |
| CN110219758A (en) * | 2019-06-03 | 2019-09-10 | 柳州源创电喷技术有限公司 | Electromagnetic type injector drive circuit system |
| CN110219758B (en) * | 2019-06-03 | 2024-01-23 | 柳州源创电喷技术有限公司 | Solenoid valve type injector drive circuit system |
| CN111075608A (en) * | 2019-10-15 | 2020-04-28 | 陈其安 | Electric control carburetor for small fuel engine |
| CN110748428A (en) * | 2019-11-22 | 2020-02-04 | 无锡职业技术学院 | Oil sprayer driving circuit |
| CN110748428B (en) * | 2019-11-22 | 2022-04-19 | 无锡职业技术学院 | Oil sprayer driving circuit |
| CN113565661A (en) * | 2021-07-23 | 2021-10-29 | 武汉天富海科技发展有限公司 | Electromagnetic valve drive control device of intelligent electric control booster pump |
| CN113848858A (en) * | 2021-09-29 | 2021-12-28 | 广西玉柴机器股份有限公司 | High-precision low-delay MEUN valve current acquisition method |
| CN113882948A (en) * | 2021-11-04 | 2022-01-04 | 上海海能汽车电子有限公司 | Controller for multi-cylinder diesel engine |
| CN114087080A (en) * | 2021-11-18 | 2022-02-25 | 镇江昌宏测控技术有限公司 | Piezoelectric crystal/electromagnetic type high-pressure common rail oil injector universal control circuit |
| CN114087080B (en) * | 2021-11-18 | 2023-10-20 | 镇江昌宏测控技术有限公司 | General control circuit of piezoelectric crystal/electromagnetic type high-pressure common rail fuel injector |
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Application publication date: 20180629 |