CN205744227U - Fuel solenoid valve power supply circuits for diesel engine - Google Patents
Fuel solenoid valve power supply circuits for diesel engine Download PDFInfo
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- CN205744227U CN205744227U CN201521113373.6U CN201521113373U CN205744227U CN 205744227 U CN205744227 U CN 205744227U CN 201521113373 U CN201521113373 U CN 201521113373U CN 205744227 U CN205744227 U CN 205744227U
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- power supply
- diesel engine
- switching tube
- supply circuit
- bypass power
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Abstract
The utility model discloses a kind of fuel solenoid valve power supply circuits for diesel engine, including the bypass power supply circuit in parallel with diesel engine voltage regulating rectification circuit and for controlling the control circuit of bypass power supply circuit output, described bypass power supply circuit exports after the voltage that charge coil exports is carried out rectifying and wave-filtering, for powering when electromotor starts to diesel engine fuel oil electromagnetic valve, described control circuit is for detecting the output voltage of bypass power supply circuit, and the output voltage detected is compared with setting value, disconnect bypass power supply circuit.It, for powering diesel engine fuel oil electromagnetic valve when electromotor starts, effectively solves the function that diesel engine cannot cannot be protected after starting or starting on startup in the case of without storage battery automatically.
Description
Technical field
This utility model relates to diesel engine arts, particularly relates to a kind of fuel solenoid valve power supply circuits for diesel engine.
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: 1. throttle combination controls injection pump, and 2. injection pump carries electromagnetic valve switch.
Electromagnetic valve switch state is carried at injection pump; diesel engine just must can be opened electromagnetic valve switch and start when being furnished with storage battery; this shortcoming must have storage battery when being and start; or manually use mechanical system to open electromagnetic valve switch to start; start because manually using mechanical system to open electromagnetic valve switch; this is a pressure action; if there is no artificial homing action; this switch can positive opening always; electromagnetic valve switch will lose function; operation complexity, and automatic protection functions can not be realized in normal work.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art; a kind of fuel solenoid valve power supply circuits for diesel engine are provided; it, for powering diesel engine fuel oil electromagnetic valve when electromotor starts, effectively solves the function that diesel engine cannot cannot be protected after starting or starting on startup in the case of without storage battery automatically.
The purpose of this utility model is achieved in that a kind of fuel solenoid valve power supply circuits for diesel engine, including the bypass power supply circuit in parallel with diesel engine voltage regulating rectification circuit and for controlling the control circuit of bypass power supply circuit output, described bypass power supply circuit exports after the voltage that charge coil exports is carried out rectifying and wave-filtering, for powering when electromotor starts to diesel engine fuel oil electromagnetic valve, described control circuit is for detecting the output voltage of bypass power supply circuit, and the output voltage detected is compared with setting value, disconnect bypass power supply circuit.
Described bypass power supply circuit includes the 10th diode D10, the 11st diode D11 and the 5th filter capacitor C5, the described positive pole of the 10th diode D10 is connected with the first input interface of voltage regulating rectification circuit, the described positive pole of the 11st diode D11 is connected with the second input interface of voltage regulating rectification circuit, the negative pole of described 10th diode D10, negative pole all positive poles with the 5th filter capacitor C5 of the 11st diode D11 are connected, the two ends of the 5th filter capacitor C5 are parallel with resistance R51K, and the described positive pole of the 5th filter capacitor C5 is connected with the first output interface of voltage regulating rectification circuit.The described negative pole of the 5th filter capacitor C5 is connected with the second output interface of voltage regulating rectification circuit.Being provided with the 3rd diode D3 between two output interfaces of voltage regulating rectification circuit, the described positive pole of the 3rd diode D3 is connected with the second output interface of voltage regulating rectification circuit, and the described negative pole of the 3rd diode D3 is connected with the first output interface of voltage regulating rectification circuit.
nullDescribed control circuit includes the 4th switching tube Q4、2nd switching tube Q2、2nd stabilivolt DW2，The described base stage of the 4th switching tube Q4 is connected with one end of the 23rd resistance R23，The other end ground connection of the 23rd resistance R23，The base stage of described 4th switching tube Q4 is connected with the first output interface of voltage regulating rectification circuit through resistance，The grounded emitter of described 4th switching tube Q4，The colelctor electrode of described 4th switching tube Q4 respectively with the negative pole of the 2nd stabilivolt DW2、One end of 10th resistance R10、One end of 20th resistance R20 connects，The plus earth of described 2nd stabilivolt DW2，The other end of the 10th resistance R10 is connected with the first output interface of voltage regulating rectification circuit，The other end of the 20th resistance R20 and the grid of the 2nd switching tube Q2 connect，The source ground of described 2nd switching tube Q2，The described drain electrode of the 2nd switching tube Q2 is connected with the second output interface of voltage regulating rectification circuit.
The beneficial effects of the utility model are: the charge coil that diesel engine carries output voltage under starting rotating speed is the lowest, voltage regulating rectification circuit can not be allowed to start, therefore this utility model design bypass power supply circuit, when diesel engine starting, powered to electromagnetic valve switch by bypass power supply circuit, bypass power supply circuit of the present utility model improves the output voltage started under rotating speed, meets electromagnetic valve switch (running voltage of electromagnetic valve switch is at DC8V ~ 15V) under startup rotating speed and normally works.Start rear voltage to raise, when bypass power supply circuit output voltage reaches setting value, control circuit controls bypass power supply circuit and disconnects, now, charge coil provides voltage to voltage regulating rectification circuit in diesel engine operating rotational speed range, and charging for electrical appliance and storage battery after voltage regulating rectifier provides power supply.Use said structure, make voltage that charge coil can directly export by this utility model on startup for electromagnetic valve after bypass power supply circuit rectifies, when diesel engine normally works to the voltage of charge coil output after voltage regulating rectification circuit voltage regulating rectifier for solenoid valve and storage battery charging.When design bypass power supply circuit is to solve electromotor startup, the idle state of fuel solenoid valve.
This utility model is not required to artificially open the action of electromagnetic valve switch; upon start up; the charge coil of diesel engine self will output voltage processed by voltage regulating rectification circuit after for electromagnetic valve switch provide power supply; open electromagnetic valve switch; diesel engine is allowed normally to work; when engine oil pressure occurs not enough, oil pressure sensor will be by controlling electromagnetic valve switch on/off, it is achieved protection.
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 fuel solenoid valve power supply circuits for diesel engine of the present utility model；
Fig. 2 is the circuit diagram of Application Example of the present utility model.
Detailed description of the invention
See Fig. 1 and Fig. 2, a kind of fuel solenoid valve power supply circuits for diesel engine, including the bypass power supply circuit in parallel with diesel engine voltage regulating rectification circuit and for controlling the control circuit of bypass power supply circuit output, described bypass power supply circuit exports after the voltage that charge coil exports is carried out rectifying and wave-filtering, for powering when electromotor starts to diesel engine fuel oil electromagnetic valve, described control circuit is for detecting the output voltage of bypass power supply circuit, and the output voltage detected is compared with setting value, disconnect bypass power supply circuit.
Described bypass power supply circuit includes the 10th diode D10, the 11st diode D11 and the 5th filter capacitor C5, the described positive pole of the 10th diode D10 is connected with the first input interface of voltage regulating rectification circuit, the described positive pole of the 11st diode D11 is connected with the second input interface of voltage regulating rectification circuit, the described negative pole of the 10th diode D10, the negative pole of the 11st diode D11 are all connected with positive pole, one end of resistance R51 of the 5th filter capacitor C5, and the two ends of the 5th filter capacitor C5 are parallel with resistance R51K.Resistance R51K discharges to C5.The described positive pole of the 5th filter capacitor C5 is connected with the first output interface of voltage regulating rectification circuit.The described negative pole of the 5th filter capacitor C5 is connected with the second output interface of voltage regulating rectification circuit.
nullDescribed control circuit includes the 4th switching tube Q4、2nd switching tube Q2、2nd stabilivolt DW2，The described base stage of the 4th switching tube Q4 is connected with one end of the 23rd resistance R23，The other end ground connection of the 23rd resistance R23，The base stage of described 4th switching tube Q4 is connected with the first output interface of voltage regulating rectification circuit through resistance，The grounded emitter of described 4th switching tube Q4，The colelctor electrode of described 4th switching tube Q4 respectively with the negative pole of the 2nd stabilivolt DW2、One end of 10th resistance R10、One end of 20th resistance R20 connects，The plus earth of described 2nd stabilivolt DW2，The other end of the 10th resistance R10 is connected with the first output interface of voltage regulating rectification circuit，The other end of the 20th resistance R20 and the grid of the 2nd switching tube Q2 connect，The source ground of described 2nd switching tube Q2，The described drain electrode of the 2nd switching tube Q2 is connected with the second output interface of voltage regulating rectification circuit.
Being provided with the 3rd diode D3 between two output interfaces of voltage regulating rectification circuit, the described positive pole of the 3rd diode D3 is connected with the second output interface of voltage regulating rectification circuit, and the described negative pole of the 3rd diode D3 is connected with the first output interface of voltage regulating rectification circuit.D3 is fly-wheel diode, for providing discharge loop to electromagnetic valve.
Separated by diode between voltage regulating rectification circuit and bypass power supply circuit.
Operation principle of the present utility model: the alternating current that charge coil is produced by bypass power supply circuit supplies electromagnetic valve after D10, D11 and C5 rectifying and wave-filtering.Bypass control circuit, by the control to metal-oxide-semiconductor Q2, realizes the control to bypass circuit；When voltage is less than setting value, Q2 turns on, and controls bypass power supply circuit and accesses；When voltage is more than or equal to setting value, Q2 turns off, and controls bypass power supply circuit and disconnects, and after bypass power supply circuit disconnects, the voltage regulating rectification circuit with bypass power supply circuit in parallel continues power supply to electromagnetic valve.
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)
1. the fuel solenoid valve power supply circuits for diesel engine, it is characterized in that: include the bypass power supply circuit in parallel with diesel engine voltage regulating rectification circuit and for controlling the control circuit of bypass power supply circuit output, described bypass power supply circuit exports after the voltage that charge coil exports is carried out rectifying and wave-filtering, for powering when electromotor starts to diesel engine fuel oil electromagnetic valve, described control circuit is for detecting the output voltage of bypass power supply circuit, and the output voltage detected is compared with setting value, disconnect bypass power supply circuit.
Fuel solenoid valve power supply circuits for diesel engine the most according to claim 1, it is characterized in that: described bypass power supply circuit includes the 10th diode (D10), 11st diode (D11) and the 5th filter capacitor (C5), the positive pole of described 10th diode (D10) is connected with the first input interface of voltage regulating rectification circuit, the positive pole of described 11st diode (D11) is connected with the second input interface of voltage regulating rectification circuit, the negative pole of described 10th diode (D10), the negative pole of the 11st diode (D11) all positive poles with the 5th filter capacitor (C5) are connected, the positive pole of described 5th filter capacitor (C5) and the first output interface connect, the negative pole of described 5th filter capacitor (C5) and the second output interface connect.
nullFuel solenoid valve power supply circuits for diesel engine the most according to claim 1，It is characterized in that: described control circuit includes the 4th switching tube (Q4)、2nd switching tube (Q2)、2nd stabilivolt (DW2)，The described base stage of the 4th switching tube (Q4) is connected with one end of the 23rd resistance (R23)，The other end ground connection of the 23rd resistance (R23)，The base stage of described 4th switching tube (Q4) is connected with the first output interface of voltage regulating rectification circuit through resistance，The grounded emitter of described 4th switching tube (Q4)，The colelctor electrode of described 4th switching tube (Q4) respectively with the negative pole of the 2nd stabilivolt (DW2)、One end of 10th resistance (R10)、One end of 20th resistance (R20) connects，The plus earth of described 2nd stabilivolt (DW2)，The other end of the 10th resistance (R10) is connected with the first output interface of voltage regulating rectification circuit，The other end of the 20th resistance (R20) and the grid of the 2nd switching tube (Q2) connect，The source ground of described 2nd switching tube (Q2)，The drain electrode of described 2nd switching tube (Q2) is connected with the second output interface of voltage regulating rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521113373.6U CN205744227U (en) | 2015-12-29 | 2015-12-29 | Fuel solenoid valve power supply circuits for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521113373.6U CN205744227U (en) | 2015-12-29 | 2015-12-29 | Fuel solenoid valve power supply circuits for diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN205744227U true CN205744227U (en) | 2016-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201521113373.6U Active CN205744227U (en) | 2015-12-29 | 2015-12-29 | Fuel solenoid valve power supply circuits for diesel engine |
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| CN (1) | CN205744227U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233714A (en) * | 2018-03-20 | 2018-06-29 | 奥克斯空调股份有限公司 | A kind of solenoid valve control circuit and air conditioner |
-
2015
- 2015-12-29 CN CN201521113373.6U patent/CN205744227U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233714A (en) * | 2018-03-20 | 2018-06-29 | 奥克斯空调股份有限公司 | A kind of solenoid valve control circuit and air conditioner |
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