CN204493046U - A kind of booster circuit of diesel engine electric-controlled oil ejector - Google Patents
A kind of booster circuit of diesel engine electric-controlled oil ejector Download PDFInfo
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- CN204493046U CN204493046U CN201520134809.3U CN201520134809U CN204493046U CN 204493046 U CN204493046 U CN 204493046U CN 201520134809 U CN201520134809 U CN 201520134809U CN 204493046 U CN204493046 U CN 204493046U
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Abstract
The booster circuit of this diesel engine electric-controlled oil ejector, comprises booster power managing chip; Input voltage is connected to VIN pin, is connected to UVLO pin through resistance R1 and is connected to the positive pole of diode D1 and the drain electrode of field effect transistor Q1 through inductance L 1.When MOSFET disconnects, due to the electric current retention performance of inductance L 1, the electric current flowing through inductance can not at once vanishing, and original circuit has disconnected, so inductance can only by the electric discharge of new circuit loop, namely inductance, electric capacity and Schottky diode have formed a continuous current circuit, inductance L 1 is charged to electric capacity C7 by Schottky diode D1, electric capacity C7 both end voltage raises, and completes energy transferring, and now output voltage is higher than input voltage.Level of integration is higher, and circuit structure is simple and practical, and the conversion efficiency of power supply is relatively high, and power consumption is less, and possesses perfect self-diagnostic function.The high voltage demands that diesel engine electric-controlled oil ejector drives can be met completely, reliably can realize the quick unlatching of fuel injector magnetic system.
Description
Technical field
The utility model relates to a kind of booster circuit of diesel engine electric-controlled oil ejector.
Background technique
The ideal movements characteristic of solenoid valve realizes at solenoid valves initial stage Implantation Energy as soon as possible, to improve the speed of response that solenoid valve is opened, after solenoid valve is opened, only needs less electric current to maintain conducting.So not only can reduce energy ezpenditure, reduce the heating value of solenoid valve, and the turn-off response speed of solenoid valve can be improved.
At oil sprayer start-up time, higher driving voltage can make fuel injector magnetic system open fast, reduces the opening time of oil sprayer, and then ensures good fuel spray characteristic.The powering mode of double-power source generally selected by drive circuit due to diesel engine electric-controlled oil ejector, different from independent Power supply pattern, needs the circuit arrangement voltage of 24V being risen to tens volts, therefore needs design booster circuit.
Summary of the invention
The utility model, in order to overcome the deficiency of above technology, provides that a kind of circuit structure is simple, the booster circuit of working stability.
The utility model overcomes the technological scheme that its technical problem adopts:
The booster circuit of this diesel engine electric-controlled oil ejector, comprises booster power managing chip; Input voltage is connected to VIN pin, is connected to UVLO pin through resistance R1 and is connected to the positive pole of diode D1 and the drain electrode of field effect transistor Q1 through inductance L 1; The negative pole of described diode D1 is connected to after FB pin and electric capacity C7 through resistance R6 respectively and forms output voltage terminal; The grid of described field effect transistor Q1 is connected to OUT pin, and its source electrode is connected to CS pin and resistance R5, is connected to CS pin and GND pin after described resistance R5 is in parallel with electric capacity C6; Electric capacity C5 one end is connected to VCC pin, and its other end is connected to electric capacity C6 and ground connection; Resistance R3 one end is connected to RT pin, and its other end is connected to resistance R2 and ground connection, and described resistance R2 is connected to UVLO pin, and resistance R7 is connected to resistance R6 and FB pin.
Above-mentioned booster power managing chip is LM5022 booster power managing chip.
Also comprise one end ground connection, the other end is connected to the electric capacity C2 of power management chip SS pin.
The resistance R4 and electric capacity C3 and electric capacity C4, the described electric capacity C4 that also comprise series connection are mutually connected with power management chip COMP pin and FB pin with after electric capacity C3 parallel connection respectively with the circuit R4 after series connection.
The beneficial effects of the utility model are: when MOSFET disconnects, due to the electric current retention performance of inductance L 1, the electric current flowing through inductance can not at once vanishing, and original circuit has disconnected, so inductance can only by the electric discharge of new circuit loop, namely inductance, electric capacity and Schottky diode have formed a continuous current circuit, inductance L 1 is charged to electric capacity C7 by Schottky diode D1, electric capacity C7 both end voltage raises, and completes energy transferring, and now output voltage is higher than input voltage.Level of integration is higher, and circuit structure is simple and practical, and the conversion efficiency of power supply is relatively high, and power consumption is less, and possesses perfect self-diagnostic function.The high voltage demands that diesel engine electric-controlled oil ejector drives can be met completely, reliably can realize the quick unlatching of fuel injector magnetic system, thus reach the object accurately controlling oil sprayer.
Accompanying drawing explanation
Fig. 1 is circuit system structure schematic diagram of the present utility model.
Embodiment
Be described further below in conjunction with accompanying drawing 1 pair of the utility model.
The booster circuit of this diesel engine electric-controlled oil ejector, comprises booster power managing chip; Input voltage is connected to VIN pin, is connected to UVLO pin through resistance R1 and is connected to the positive pole of diode D1 and the drain electrode of field effect transistor Q1 through inductance L 1; The negative pole of diode D1 is connected to after FB pin and electric capacity C7 through resistance R6 respectively and forms output voltage terminal; The grid of field effect transistor Q1 is connected to OUT pin, and its source electrode is connected to CS pin and resistance R5, is connected to CS pin and GND pin after resistance R5 is in parallel with electric capacity C6; Electric capacity C5 one end is connected to VCC pin, and its other end is connected to electric capacity C6 and ground connection; Resistance R3 one end is connected to RT pin, and its other end is connected to resistance R2 and ground connection, and resistance R2 is connected to UVLO pin, and resistance R7 is connected to resistance R6 and FB pin.RT pin, by R3 ground connection, can arrange the switching frequency of high-voltage power by regulating resistance R3.The function of UVLO can prevent LM5022 absorption big current from inductance or MOSFET are overheated, and UVLO threshold values uses R1 and R2 two electric resistance partial pressure to arrange.VCC pin carries out decoupling by electric capacity C5.R5 is that sampling resistor carries out real-time sampling to the electric current in circuit and feeds back to power management sucker, and electric capacity C6 plays filter action.The PWM ripple that OUT pin produces controls field effect transistor Q1 high speed conducting and closedown, to reach the object of boosting.When MOSFET conducting, Schottky diode D1 oppositely ends, and the electric current flowed through in inductance L 1 increases with certain ratio linear continuous, and this ratio is relevant with the size of inductance, and along with the increase of inductance L 1 electric current, inductance L 1 stores certain energy; When MOSFET disconnects, due to the electric current retention performance of inductance L 1, the electric current flowing through inductance can not at once vanishing, and original circuit has disconnected, so inductance can only by the electric discharge of new circuit loop, namely inductance, electric capacity and Schottky diode have formed a continuous current circuit, inductance L 1 is charged to electric capacity C7 by Schottky diode D1, electric capacity C7 both end voltage raises, and completes energy transferring, and now output voltage is higher than input voltage.This circuit arranges the frequency of okperation of PWM by resistance R3, regulates the turn-on and turn-off time of field effect transistor Q1 to keep output voltage constant, thus realize the object of boosting and voltage stabilizing by changing pulsewidth.
The more old-fashioned high-voltage power circuit structure of circuit structure of the design, level of integration is higher, and circuit structure is simple and practical, and the conversion efficiency of power supply is relatively high, and power consumption is less, and possesses perfect self-diagnostic function.The high voltage demands that diesel engine electric-controlled oil ejector drives can be met completely, reliably can realize the quick unlatching of fuel injector magnetic system, thus reach the object accurately controlling oil sprayer.
Booster power managing chip can be LM5022 booster power managing chip.The little space layout can saving again components and parts of encapsulation volume of LM5022 is a kind of trend and the trend of following novel high-pressure Power Management Design.
Can also comprise one end ground connection, the other end is connected to the electric capacity C2 of power management chip SS pin.Booster power managing chip, by SS pipe foot meridian capacitor C2 ground connection, can play the function of soft start.Resistance R4 and electric capacity C3 and electric capacity C4, the electric capacity C4 that can also comprise series connection are mutually connected with power management chip COMP pin and FB pin with after electric capacity C3 parallel connection respectively with the circuit R4 after series connection.Suitable R4, C3 and C4 are set and can play the effect carrying out loop compensation.
Claims (4)
1. a booster circuit for diesel engine electric-controlled oil ejector, is characterized in that: comprise booster power managing chip; Input voltage is connected to VIN pin, is connected to UVLO pin through resistance R1 and is connected to the positive pole of diode D1 and the drain electrode of field effect transistor Q1 through inductance L 1; The negative pole of described diode D1 is connected to after FB pin and electric capacity C7 through resistance R6 respectively and forms output voltage terminal; The grid of described field effect transistor Q1 is connected to OUT pin, and its source electrode is connected to CS pin and resistance R5, is connected to CS pin and GND pin after described resistance R5 is in parallel with electric capacity C6; Electric capacity C5 one end is connected to VCC pin, and its other end is connected to electric capacity C6 and ground connection; Resistance R3 one end is connected to RT pin, and its other end is connected to resistance R2 and ground connection, and described resistance R2 is connected to UVLO pin, and resistance R7 is connected to resistance R6 and FB pin.
2. the booster circuit of diesel engine electric-controlled oil ejector according to claim 1, is characterized in that: described booster power managing chip is LM5022 booster power managing chip.
3. the booster circuit of diesel engine electric-controlled oil ejector according to claim 1 and 2, is characterized in that: also comprise one end ground connection, and the other end is connected to the electric capacity C2 of power management chip SS pin.
4. the booster circuit of diesel engine electric-controlled oil ejector according to claim 3, it is characterized in that: the resistance R4 and electric capacity C3 and electric capacity C4, the described electric capacity C4 that also comprise series connection are mutually connected with power management chip COMP pin and FB pin with after electric capacity C3 parallel connection respectively with the circuit R4 after series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520134809.3U CN204493046U (en) | 2015-03-11 | 2015-03-11 | A kind of booster circuit of diesel engine electric-controlled oil ejector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520134809.3U CN204493046U (en) | 2015-03-11 | 2015-03-11 | A kind of booster circuit of diesel engine electric-controlled oil ejector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204493046U true CN204493046U (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520134809.3U Withdrawn - After Issue CN204493046U (en) | 2015-03-11 | 2015-03-11 | A kind of booster circuit of diesel engine electric-controlled oil ejector |
Country Status (1)
| Country | Link |
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| CN (1) | CN204493046U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747331A (en) * | 2015-03-11 | 2015-07-01 | 中国重汽集团济南动力有限公司 | Boost circuit of diesel engine electrical control oil injector |
| CN106655772A (en) * | 2016-09-26 | 2017-05-10 | 西安应用光学研究所 | Booster circuit having over-voltage surge function |
-
2015
- 2015-03-11 CN CN201520134809.3U patent/CN204493046U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747331A (en) * | 2015-03-11 | 2015-07-01 | 中国重汽集团济南动力有限公司 | Boost circuit of diesel engine electrical control oil injector |
| CN104747331B (en) * | 2015-03-11 | 2017-04-05 | 中国重汽集团济南动力有限公司 | A kind of booster circuit of diesel engine electric-controlled oil ejector |
| CN106655772A (en) * | 2016-09-26 | 2017-05-10 | 西安应用光学研究所 | Booster circuit having over-voltage surge function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150722 Effective date of abandoning: 20170405 |
|
| AV01 | Patent right actively abandoned |