CN111927666B - High-pressure common rail oil sprayer rapid follow current circuit - Google Patents
High-pressure common rail oil sprayer rapid follow current circuit Download PDFInfo
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- CN111927666B CN111927666B CN202010817914.2A CN202010817914A CN111927666B CN 111927666 B CN111927666 B CN 111927666B CN 202010817914 A CN202010817914 A CN 202010817914A CN 111927666 B CN111927666 B CN 111927666B
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- diode
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- follow current
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- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
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- 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
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
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- 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
The invention discloses a fast follow current circuit of a high-pressure common rail oil sprayer, which relates to the field of oil sprayer driving circuits and comprises the following components: the fuel injector comprises a main controller, a logic module, a high-end integrated drive circuit, a low-end integrated drive circuit, a current conditioning circuit, a circuit device and a follow current circuit, wherein the follow current circuit comprises a third diode, a first capacitor, a follow current resistor and a voltage regulator tube, the drain electrode of the third switch tube is connected to the anode of the third diode, the cathode of the third diode is respectively connected to the first capacitor, the follow current resistor and the cathode of the voltage regulator tube, the anodes of the first capacitor, the follow current resistor and the voltage regulator tube are connected to a sampling resistor in parallel and are connected, and through the follow current circuit, the current in an electromagnetic valve inductor of the fuel injector is rapidly reduced to zero at the moment of closing the fuel injector, so that the current follow current time and the seating time of an armature of the electromagnetic valve are shortened, the actual closing time of the fuel injector is shortened, and the fuel injection characteristic of the fuel injector is improved.
Description
Technical Field
The invention relates to the field of fuel injector driving circuits, in particular to a high-pressure common rail fuel injector fast follow current circuit.
Background
The diesel engine has high fuel economy and reliable work, is widely applied to the fields of engineering machinery, agricultural machinery, ships and the like besides the field of vehicles, and in order to meet increasingly strict engine emission regulations, a high-pressure common rail oil supply system is mostly adopted in diesel engines with better performance on the market at present, but when a driving circuit of the high-pressure common rail oil injector is closed, because the driving voltage of a new generation oil injector is about 50V, when the oil injector is closed, the current change rate in the inductance of the electromagnetic valve of the oil injector is not very high, namely, the current in the inductance of the electromagnetic valve of the oil injector can be reduced to zero within a longer time, so that the seating time of the armature of the electromagnetic valve of the oil injector is prolonged, the closing time of the oil injector is prolonged, and certain negative influence is caused on the oil injection characteristic of the oil injector.
Disclosure of Invention
The invention provides a high-pressure common rail oil sprayer rapid follow current circuit aiming at the problems and the technical requirements, and the technical scheme of the invention is as follows:
a high-voltage common rail fuel injector fast follow current circuit comprises a main controller, a logic module, a high-end integrated drive circuit, a low-end integrated drive circuit, a current conditioning circuit, a first switch tube, a second switch tube, a third switch tube, a first diode, a second diode, a sampling resistor and a follow current circuit, wherein the main controller is connected to the logic module, the logic module is connected to the high-end integrated drive circuit and the low-end integrated drive circuit, the high-end integrated drive circuit is connected to a grid electrode of the first switch tube and a grid electrode of the second switch tube, a drain electrode of the first switch tube is connected to a battery power supply to obtain battery voltage, a source electrode of the first switch tube is connected to an anode of the first diode, a cathode of the first diode is connected to a cathode of the second diode, an anode of the second diode is grounded, and a drain electrode of the second switch tube is connected to a drive power supply to obtain drive voltage, the source electrode of the second switch tube is connected to the cathode of the first diode, the cathode of the second diode and an injector solenoid valve inductor, the injector solenoid valve inductor is connected to the drain electrode of the third switch tube, the low-end integrated drive circuit is connected to the grid electrode of the third switch tube, the source electrode of the third switch tube is connected to the sampling resistor, the other end of the sampling resistor is grounded, two ends of the sampling resistor are respectively connected to the current conditioning circuit, the current conditioning circuit is connected to the logic module, the freewheel circuit comprises a third diode, a first capacitor, a freewheel resistor and a voltage regulator tube, the drain electrode of the third switch tube is connected to the anode of the third diode, the cathode of the third diode is respectively connected to the first capacitor, the freewheel resistor and the cathode of the voltage regulator tube, and the other end of the first capacitor, The other end of the follow current resistor is connected with the anode of the voltage stabilizing tube and is grounded.
The further technical scheme is that the first switching tube, the second switching tube and the third switching tube are NMOS tubes.
The further technical scheme is that the fuel injector electromagnetic valve is controlled to be on or off by the inductance.
The further technical scheme is that the logic module comprises a CPLD.
According to a further technical scheme, when the voltage of the first capacitor rises to the voltage limiting value of the voltage stabilizing tube, the current in the follow current circuit drops to the breakdown current tolerance range of the voltage stabilizing tube.
The beneficial technical effects of the invention are as follows: by connecting the follow current circuit in the high-pressure common rail oil sprayer driving circuit, the current in the electromagnetic valve inductor of the oil sprayer is rapidly reduced to zero at the moment of closing the oil sprayer, the current follow current time and the seating time of the armature of the electromagnetic valve are shortened, the actual closing time of the oil sprayer is shortened, and the oil spraying characteristic of the oil sprayer is improved.
Drawings
Fig. 1 is a circuit schematic of a freewheel circuit of the present application.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
As shown in fig. 1, a fast follow current circuit of a high-pressure common rail injector includes a main controller MCU, a Logic module, a high-end integrated drive circuit, a low-end integrated drive circuit, a current conditioning circuit, a first switch tube M1, a second switch tube M2, a third switch tube M3, a follow current circuit, a first diode D1, a second diode D2, and a sampling resistor R, where the Logic module includes a CPLD (Complex Programmable Logic Device) capable of adjusting its internal Logic on site, the internal Logic of the CPLD is generated according to an external input signal and a Logic signal to be output, and the first switch tube M1, the second switch tube M2, and the third switch tube M3 are NMOS tubes.
The main controller MCU is connected to a logic module, the logic module is connected to a high-side integrated drive circuit and a low-side integrated drive circuit, the high-side integrated drive circuit is connected to a grid electrode of a first switch tube M1 and a grid electrode of a second switch tube M2, a drain electrode of the first switch tube M1 is connected to a battery power supply for obtaining a battery voltage, a source electrode is connected to an anode electrode of a first diode D1, a cathode electrode of the first diode D1 is connected to a cathode electrode of a second diode D2, an anode electrode of the second diode D2 is grounded, a drain electrode of the second switch tube M2 is connected to a driving power supply for obtaining a driving voltage, a source electrode of the second switch tube M2 is connected to a cathode electrode of a first diode D1, a cathode electrode of the second diode D2 and a solenoid valve inductance L, the solenoid valve inductance L is connected to a drain electrode of a third switch tube M3, the low-side integrated drive circuit is connected to a grid electrode of the third switch tube M3, a source electrode of the third switch tube M3 is connected to a sampling resistor R, the other end of the sampling resistor R is grounded, and the two ends of the sampling resistor R are respectively connected to the current conditioning circuit.
The follow current circuit comprises a third diode D3, a first capacitor C1, a follow current resistor R1 and a voltage regulator tube D4, the drain electrode of the third switch tube M3 is connected to the anode of the third diode D3, the cathode of the third diode D3 is connected to the cathodes of the first capacitor C1, the follow current resistor R1 and the voltage regulator tube D4 respectively, and the other end of the first capacitor C1, the other end of the follow current resistor R1 and the anode of the voltage regulator tube D4 are connected with the ground.
The working principle of the circuit design is as follows: when the driving circuit is turned off, the current in the inductor L of the solenoid valve of the oil injector cannot disappear immediately, the current in the inductor L of the solenoid valve of the oil injector charges the first capacitor C1 through the third diode D3, so that the voltage on the first capacitor C1 is quickly increased, and when the voltage limiting value of the voltage stabilizing tube D4 is reached, the current is released through the voltage stabilizing tube D4 until the current in the inductor L of the solenoid valve of the oil injector disappears; when the current in the inductor L of the solenoid valve of the fuel injector disappears, the voltage of the first capacitor C1 drops, the current cannot be consumed from the voltage regulator tube D4, and the inductor L of the solenoid valve of the fuel injector cannot be charged due to the existence of the third diode D3, so that the energy stored in the first capacitor C1 is consumed through the freewheeling resistor R1. When the first capacitor C1 is selected, the current in the circuit is reduced to the breakdown current tolerance range of the voltage stabilizing tube when the voltage of the first capacitor C1 is increased to the voltage limiting value of the voltage stabilizing tube, the voltage stabilizing tube can obtain a higher voltage limiting value, the voltage change rate of the follow current circuit is accelerated, the current in the electromagnetic valve inductor L of the oil injector is rapidly reduced to zero, and favorable conditions are created for closing the electromagnetic valve of the oil injector.
The invention has simple structure, only needs a small amount of circuit devices, shortens follow current time through the follow current circuit at the moment of closing the oil injector, reduces the time delay of closing the oil injector, improves the oil injection characteristic of the oil injector, and has lower use cost.
What has been described above is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiment. It is to be understood that other modifications and variations directly derivable or suggested by those skilled in the art without departing from the spirit and concept of the present invention are to be considered as included within the scope of the present invention.
Claims (4)
1. A high-voltage common rail fuel injector fast follow current circuit is characterized by comprising a main controller, a logic module, a high-end integrated drive circuit, a low-end integrated drive circuit, a current conditioning circuit, a first switch tube, a second switch tube, a third switch tube, a first diode, a second diode, a sampling resistor and a follow current circuit, wherein the main controller is connected to the logic module, the logic module is connected to the high-end integrated drive circuit and the low-end integrated drive circuit, the high-end integrated drive circuit is connected to a grid electrode of the first switch tube and a grid electrode of the second switch tube, a drain electrode of the first switch tube is connected to a battery power supply for obtaining battery voltage, a source electrode of the first switch tube is connected to an anode of the first diode, a cathode of the first diode is connected to a cathode of the second diode, and an anode of the second diode is grounded, the drain electrode of the second switch tube is connected to a driving power supply to obtain driving voltage, the source electrode of the second switch tube is connected to the cathode of the first diode, the cathode of the second diode and an oil injector electromagnetic valve inductor, the oil injector electromagnetic valve inductor controls the on-off of an oil injector electromagnetic valve, the oil injector electromagnetic valve inductor is connected to the drain electrode of the third switch tube, the low-end integrated driving circuit is connected to the grid electrode of the third switch tube, the source electrode of the third switch tube is connected to the sampling resistor, the other end of the sampling resistor is grounded, two ends of the sampling resistor are respectively connected to the current conditioning circuit, the current conditioning circuit is connected to the logic module, the follow current circuit comprises a third diode, a first capacitor, a follow current resistor and a voltage stabilizing tube, and the drain electrode of the third switch tube is connected to the anode of the third diode, the negative electrode of the third diode is respectively connected to the first capacitor, the follow current resistor and the negative electrode of the voltage regulator tube, and the other end of the first capacitor, the other end of the follow current resistor and the positive electrode of the voltage regulator tube are connected and grounded;
when the driving circuit is turned off, the current in the oil injector solenoid valve inductor charges the first capacitor through the third diode, and when the voltage on the first capacitor is increased to the voltage limiting value of the voltage stabilizing tube, the current is released through the voltage stabilizing tube until the current in the oil injector solenoid valve inductor disappears; when the current in the fuel injector solenoid valve inductor disappears, the voltage on the first capacitor drops, and the energy stored in the first capacitor is consumed through the follow current resistor.
2. The high-pressure common rail injector fast follow current circuit according to claim 1, wherein the first switching tube, the second switching tube and the third switching tube are all NMOS tubes.
3. The high-pressure common rail injector rapid follow current circuit according to claim 1, characterized in that the logic module comprises a CPLD.
4. The high-pressure common rail fuel injector fast follow current circuit according to claim 1, wherein when the voltage of the first capacitor rises to the voltage limiting value of the voltage stabilizing tube, the current in the follow current circuit drops to the breakdown current tolerance range of the voltage stabilizing tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010817914.2A CN111927666B (en) | 2020-08-14 | 2020-08-14 | High-pressure common rail oil sprayer rapid follow current circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010817914.2A CN111927666B (en) | 2020-08-14 | 2020-08-14 | High-pressure common rail oil sprayer rapid follow current circuit |
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| Publication Number | Publication Date |
|---|---|
| CN111927666A CN111927666A (en) | 2020-11-13 |
| CN111927666B true CN111927666B (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010817914.2A Active CN111927666B (en) | 2020-08-14 | 2020-08-14 | High-pressure common rail oil sprayer rapid follow current circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592982B (en) * | 2022-03-18 | 2023-07-21 | 无锡职业技术学院 | Rapid high-current follow current circuit of high-pressure common rail fuel injector |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4435745A (en) * | 1981-03-19 | 1984-03-06 | Robert Bosch Gmbh | Device for generating specific electrical voltage values for consumers associated with an internal combustion engine |
| CN1241300A (en) * | 1996-12-18 | 2000-01-12 | 西门子公司 | Method and device for controlling at least one capacitive actuator |
| EP1067608B1 (en) * | 1999-07-09 | 2005-11-09 | Renault s.a.s. | Device and control circuit for a piezoelectric actuator |
| JP2014092090A (en) * | 2012-11-05 | 2014-05-19 | Denso Corp | Fuel injection device |
| CN104074639A (en) * | 2014-07-16 | 2014-10-01 | 无锡隆盛科技股份有限公司 | Direct current motor EGR valve controller |
| CN104819062A (en) * | 2015-03-31 | 2015-08-05 | 王超军 | Fuel injector dual-power bi-side driving clamping pressure follow current circuit module |
| CN110748428A (en) * | 2019-11-22 | 2020-02-04 | 无锡职业技术学院 | Oil sprayer driving circuit |
-
2020
- 2020-08-14 CN CN202010817914.2A patent/CN111927666B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4435745A (en) * | 1981-03-19 | 1984-03-06 | Robert Bosch Gmbh | Device for generating specific electrical voltage values for consumers associated with an internal combustion engine |
| CN1241300A (en) * | 1996-12-18 | 2000-01-12 | 西门子公司 | Method and device for controlling at least one capacitive actuator |
| EP1067608B1 (en) * | 1999-07-09 | 2005-11-09 | Renault s.a.s. | Device and control circuit for a piezoelectric actuator |
| JP2014092090A (en) * | 2012-11-05 | 2014-05-19 | Denso Corp | Fuel injection device |
| CN104074639A (en) * | 2014-07-16 | 2014-10-01 | 无锡隆盛科技股份有限公司 | Direct current motor EGR valve controller |
| CN104819062A (en) * | 2015-03-31 | 2015-08-05 | 王超军 | Fuel injector dual-power bi-side driving clamping pressure follow current circuit module |
| CN110748428A (en) * | 2019-11-22 | 2020-02-04 | 无锡职业技术学院 | Oil sprayer driving circuit |
Non-Patent Citations (1)
| Title |
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| 基于TC275双燃料发动机ECU控制器设计;林霄;《中国优秀硕士论文全文数据库，工程科技Ⅱ辑》;20200430;24-26页 * |
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| CN111927666A (en) | 2020-11-13 |
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Effective date of registration: 20221109 Address after: No. 40, Jinshan Fourth Branch Road, Photoelectric New Material Science Park, Wuxi City, Jiangsu Province, 214037 Patentee after: Wuxi TOEFL Precision Machinery Co.,Ltd. Address before: No. 1600, gaolang West Road, Binhu District, Wuxi City, Jiangsu Province Patentee before: WUXI INSTITUTE OF TECHNOLOGY |