CN205745555U - Diesel engine starting and the solenoid valve control circuit of protection controller - Google Patents
Diesel engine starting and the solenoid valve control circuit of protection controller Download PDFInfo
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- CN205745555U CN205745555U CN201521113596.2U CN201521113596U CN205745555U CN 205745555 U CN205745555 U CN 205745555U CN 201521113596 U CN201521113596 U CN 201521113596U CN 205745555 U CN205745555 U CN 205745555U
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- switching tube
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- stabilivolt
- diesel engine
- solenoid valve
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses a kind of diesel engine starting and the solenoid valve control circuit of protection controller, including the first switching tube Q1, 3rd switching tube Q3, first stabilivolt DW1, the base stage of described 3rd switching tube Q3 is used for being connected with the outfan of controller single-chip microcomputer through the 7th resistance R7, the grounded emitter of described 3rd switching tube Q3, the colelctor electrode of described 3rd switching tube Q3 connects through the positive pole of resistance and the first stabilivolt DW1, the positive pole of described first stabilivolt DW1 respectively with one end of the first resistance R1, the grid of the first switching tube Q1 connects, the negative pole of described first stabilivolt DW1 respectively with power supply, the other end of the first resistance R1, the source electrode of the first switching tube Q1 connects, the drain electrode of the first switching tube Q1 is connected with fuel injection pump solenoid.Its simple in construction, controls precisely, and reliability is high.
Description
Technical field
This utility model relates to Diesel Engine Control field, particularly relates to a kind of diesel engine starting and the solenoid valve control circuit of protection controller.
Background technology
Existing small air-cooled diesel engine mainly uses mechanical type injection pump oil-break to stop working, and oil-break mode mainly has three kinds: 1. throttle combination controls injection pump, and 2. independent electrical magnet valve controls throttle combination and controls injection pump again, and 3. injection pump carries electromagnetic valve switch.
Engine oil pressure protection is main uses switching regulator pressure transducer; turn on during oil pressure deficiency; protection act mode mainly has three kinds: 1. pressure transducer controls display lamp; which is warning; can not actively protect flame-out; 2. the energising of pressure transducer control independent electrical magnet valve realizes oil-break blowout protection, and 3. pressure transducer control relay realizes oil-break blowout protection in control fuel injection pump solenoid power-off.
Diesel engine rotating speed on startup is low, and engine oil pressure is low, due to protected mode difference on startup, it may appear that different results, first kind of way can start smoothly, and second and third kind of mode there will be engine oil pressure protection auto extinguishing, it is impossible to starts smoothly.
In order to be able to start the most existing main mode used: the second control mode mainly uses independently-powered mode, this power supply no-voltage or low-voltage when rotating speed is low make electromagnetic valve akinesia, could normally work during rotating speed height after startup, and must combine by hand-reset throttle before starting every time, which shortcoming is: need external power supply, structure is complicated, relatively costly, operation complexity.Conduction mode or use time-delay relay and the mode of many group relaies combination by force when the third control mode mainly uses startup, shortcoming is that conduction mode startup reliability is poor by force, start-up course there will be equally stops working and can not start, another kind of circuit and structure are complicated, and reliability and adaptability are poor.
A kind of diesel engine starting of applicant's utility model and protection controller; it uses injection pump to carry electromagnetic valve switch; this startup and protection controller detect enabling signal the most automatically; give solenoid valve simultaneously; after startup completes; just automatically into guard mode, can power-off at once stop working when engine oil pressure occurs not enough.Accordingly, it would be desirable to a kind of simple in construction, control precisely, the solenoid valve control circuit that reliability is high, it is possible to according to the signal of controller single-chip microcomputer output, electromagnetic valve switch is controlled, it is achieved diesel engine starting, flame-out.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, it is provided that a kind of diesel engine starting and the solenoid valve control circuit of protection controller, its simple in construction, controls precisely, and reliability is high.
The purpose of this utility model is achieved in that a kind of diesel engine starting and the solenoid valve control circuit of protection controller, including single-chip microcomputer and the first switching tube Q1, 3rd switching tube Q3, first stabilivolt DW1, the base stage of described 3rd switching tube Q3 is used for being connected with the outfan of controller single-chip microcomputer through the 7th resistance R7, the grounded emitter of described 3rd switching tube Q3, the colelctor electrode of described 3rd switching tube Q3 connects through the positive pole of resistance and the first stabilivolt DW1, the positive pole of described first stabilivolt DW1 respectively with one end of the first resistance R1, the grid of the first switching tube Q1 connects, the negative pole of described first stabilivolt DW1 respectively with power supply, the other end of the first resistance R1, the source electrode of the first switching tube Q1 connects, the drain electrode of the first switching tube Q1 is connected with fuel injection pump solenoid.
Being provided with the first diode D1 between negative pole and the power supply of described first stabilivolt DW1, the positive pole of described first diode D1 is connected with power supply, and the negative pole of described first diode D1 and the negative pole of the first stabilivolt DW1 connect.
The drain electrode of described first switching tube Q1 is connected with the negative pole of the second diode D2, the plus earth of the second diode D2.
The beneficial effects of the utility model are: diesel engine of the present utility model uses injection pump to carry electromagnetic valve switch, utilize and start and protect the solenoid valve control circuit of controller to be controlled.Start and the single-chip microcomputer of protection controller detects enabling signal the most automatically; outputs level signals gives the 3rd switching tube Q3; control the 3rd switching tube Q3 conducting, cut-off; thus control the first switching tube Q1 conducting, cut-off; control fuel injection pump solenoid energising, power-off, control diesel engine starting, stop working.This solenoid valve control circuit simple in construction, controls precisely, and reliability is high.
The utility model is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the solenoid valve control circuit of diesel engine starting of the present utility model and protection controller；
Fig. 2 is diesel engine starting and the circuit diagram of protection controller using solenoid valve control circuit.
Detailed description of the invention
nullSee Fig. 1，A kind of diesel engine starting and the solenoid valve control circuit of protection controller，Including single-chip microcomputer IC1 and the first switching tube Q1、3rd switching tube Q3、First stabilivolt DW1，The base stage of described 3rd switching tube Q3 is connected through second outfan of the 7th resistance R7 and single-chip microcomputer IC1，The grounded emitter of described 3rd switching tube Q3，The second resistance R2 that the colelctor electrode of described 3rd switching tube Q3 is concatenated、The positive pole of the 4th resistance R4 and the first stabilivolt DW1 connects，The positive pole of described first stabilivolt DW1 respectively with one end of the first resistance R1、The grid of the first switching tube Q1 connects，The negative pole of described first stabilivolt DW1 respectively with power supply、The other end of the first resistance R1、The source electrode of the first switching tube Q1 connects，The drain electrode of the first switching tube Q1 is connected with fuel injection pump solenoid.Being provided with the first diode D1 between negative pole and the power supply of described first stabilivolt DW1, the positive pole of described first diode D1 is connected with power supply, and the negative pole of described first diode D1 and the negative pole of the first stabilivolt DW1 connect.The drain electrode of described first switching tube Q1 is connected with the negative pole of the second diode D2, the plus earth of the second diode D2.D1, D2 are one-way conductions.
nullSee Fig. 2，This diesel engine starting and protection controller include fuel injection pressure signal Acquisition Circuit、Enabling signal Acquisition Circuit，Described enabling signal Acquisition Circuit is for gathering the enabling signal of diesel engine，And the enabling signal of collection is passed to single-chip microcomputer IC1，Described single-chip microcomputer IC1 is used for receiving enabling signal，Export the first control signal to solenoid valve control circuit，Control fuel injection pump solenoid energising，Connect oil circuit，And start countdown timer，When countdown completes，Start oil pressure protection，When countdown is not fully complete，Do not start oil pressure protection，Described fuel injection pressure signal Acquisition Circuit is for the single-chip microcomputer IC1 passed to by the fuel injection pressure signal of pressure transducer collection，Described single-chip microcomputer IC1 is used for receiving fuel injection pressure signal and compares with setting value，Export the second control signal to solenoid valve control circuit，Control fuel injection pump solenoid power-off，Disconnect oil circuit，Realize oil pressure protection.
Diesel engine starting and protection controller also include warning circuit; described warning circuit includes second switch pipe Q2 and display lamp; the base stage of described second switch pipe Q2 is connected through first outfan of the 6th resistance R6 and single-chip microcomputer IC1; the colelctor electrode of described second switch pipe Q2 is connected with the negative pole of display lamp through the 3rd resistance R3, the grounded emitter of described second switch pipe Q2.
nullDescribed enabling signal Acquisition Circuit includes photoelectrical coupler D4、3rd diode D3、5th electric capacity C5、9th resistance R9、Tenth resistance R10，The positive pole of described 3rd diode D3 is connected with charge coil one end Strart+ of diesel engine，The negative pole of described 3rd diode D3 and one end of the 9th resistance R9 connect，The other end of the 9th resistance R9 respectively with one end of the tenth resistance R10、The positive pole of the 5th electric capacity C5 connects，The other end of the tenth resistance R10 is connected with the first input end of photoelectrical coupler D4，The negative pole of described 5th electric capacity C5 respectively with second input of photoelectrical coupler D4、The charge coil other end Strart-of diesel engine connects，First outfan of described photoelectrical coupler D4 respectively with the first input end of single-chip microcomputer IC1、One end of 16th resistance R16、One end of 4th electric capacity C4 connects，The other end of the 16th resistance R16 connects 5V voltage，The other end ground connection of the 4th electric capacity C4，Second output head grounding of described photoelectrical coupler D4.
Described fuel injection pressure signal Acquisition Circuit includes the 5th resistance R5, the 8th resistance R8, the first electric capacity C1, one end of described 8th resistance R8 is connected with pressure transducer, one end of the 5th resistance R5, one end of the first electric capacity C1 respectively, the other end of described 5th resistance R5 connects 5V voltage, the other end ground connection of the first electric capacity C1, the described other end of the 8th resistance R8 is connected with second input of single-chip microcomputer IC1.
Controller of the present utility model external parts introduction:
1. pressure transducer: this sensor is switch pattern, when pressure is less than setting sensor conducts ground connection.
2. fuel injection pump solenoid: during energising, electromagnetic valve switch is opened, oil circuit is connected, otherwise is disconnected.
3. the charge coil that diesel engine carries: provide power supply for electromotor electrical appliance after voltage regulating rectifier, and charge for accumulator.
4.LED display lamp: LED is bright when there is protection shutdown, plays reminding effect.
Operation principle of the present utility model is as follows:
nullThe charge coil output voltage that during startup, diesel engine carries，One is for starting and protection controller offer power supply after voltage regulating rectifier，Two is for starting and protection controller offer enabling signal，Photoelectrical coupler D4 turns on，Output low level is to single-chip microcomputer IC1，Single-chip microcomputer IC1 controls DCF pin output high level，The startup time simultaneously arranged starts countdown，3rd switching tube Q3 conducting，The two ends of resistance R1 form voltage，First switching tube Q1 conducting，Diesel engine is opened in fuel injection pump solenoid energising，Start to start，The startup time countdown arranged as single-chip microcomputer IC1 completes，YL starts working，Start oil pressure protection，If oil pressure is not enough，Pressure transducer turns on，Output low level is to single-chip microcomputer IC1，Single-chip microcomputer IC1 controls DCF pin output low level，And control LED pin output high level，Second switch pipe Q2 turns on，LED light is bright，And the 3rd switching tube Q3 cut-off，First switching tube Q1 cut-off，Fuel injection pump solenoid power-off，Disconnect oil circuit.
This utility model is not limited solely to above-described embodiment, carries out the technical scheme of few modifications in the case of without departing substantially from technical solutions of the utility model spirit, should fall into protection domain of the present utility model.
Claims (3)
- null1. a diesel engine starting and the solenoid valve control circuit of protection controller，It is characterized in that: include single-chip microcomputer and the first switching tube (Q1)、3rd switching tube (Q3)、First stabilivolt (DW1)，The base stage of described 3rd switching tube (Q3) is used for being connected with the outfan of single-chip microcomputer through the 7th resistance (R7)，The grounded emitter of described 3rd switching tube (Q3)，The colelctor electrode of described 3rd switching tube (Q3) connects through the positive pole of resistance and the first stabilivolt (DW1)，The positive pole of described first stabilivolt (DW1) respectively with one end of the first resistance (R1)、The grid of the first switching tube (Q1) connects，The negative pole of described first stabilivolt (DW1) respectively with power supply、The other end of the first resistance (R1)、The source electrode of the first switching tube (Q1) connects，The drain electrode of the first switching tube (Q1) is connected with fuel injection pump solenoid.
- Diesel engine starting the most according to claim 1 and the solenoid valve control circuit of protection controller; it is characterized in that: between negative pole and the power supply of described first stabilivolt (DW1), be provided with the first diode (D1); the positive pole of described first diode (D1) is connected with power supply, and the negative pole of described first diode (D1) and the negative pole of the first stabilivolt (DW1) connect.
- Diesel engine starting the most according to claim 1 and the solenoid valve control circuit of protection controller, it is characterised in that: the drain electrode of described first switching tube (Q1) is connected with the negative pole of the second diode (D2), the plus earth of the second diode (D2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521113596.2U CN205745555U (en) | 2015-12-29 | 2015-12-29 | Diesel engine starting and the solenoid valve control circuit of protection controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521113596.2U CN205745555U (en) | 2015-12-29 | 2015-12-29 | Diesel engine starting and the solenoid valve control circuit of protection controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205745555U true CN205745555U (en) | 2016-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521113596.2U Active CN205745555U (en) | 2015-12-29 | 2015-12-29 | Diesel engine starting and the solenoid valve control circuit of protection controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205745555U (en) |
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2015
- 2015-12-29 CN CN201521113596.2U patent/CN205745555U/en active Active
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