CN110657056A - Glow plug controller based on intelligent switching tube - Google Patents
Glow plug controller based on intelligent switching tube Download PDFInfo
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- CN110657056A CN110657056A CN201911136476.7A CN201911136476A CN110657056A CN 110657056 A CN110657056 A CN 110657056A CN 201911136476 A CN201911136476 A CN 201911136476A CN 110657056 A CN110657056 A CN 110657056A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
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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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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Abstract
The invention discloses a glow plug controller based on an intelligent switching tube, which comprises a power supply unit, a main circuit unit, a control circuit unit and a feedback unit, wherein the main circuit unit comprises the intelligent switching tube and a glow plug which are connected, the intelligent switching tube is used for controlling the power supply voltage of the glow plug to be switched on or switched off, the control circuit unit comprises a logic gate circuit and an SR latch chip which are connected, the logic gate circuit is used for controlling the switching-on and switching-off voltage provided by the power supply subunit of the control circuit and outputting a control signal for controlling the intelligent switching tube; the SR latch chip is used for latching the working state of the intelligent switching tube; and the feedback unit is used for respectively providing feedback signals for the main circuit power supply subunit, the control circuit power supply subunit and the control circuit unit and monitoring the working state of the glow plug in real time. The invention adopts the replacement of the intelligent switching tube, thereby not only realizing the basic requirement on the work of the preheating plug, but also realizing the state detection on the working condition of the switching tube.
Description
Technical Field
The invention relates to the technical field of intelligent control of a machine glow plug, in particular to a glow plug controller based on an intelligent switching tube.
Background
For some high-power diesel vehicles, when the diesel engine is started, especially in cold winter, the starting of the engine cycle is difficult depending on the processes of air intake, compression, explosion and exhaust because of the low external temperature, and the auxiliary heating is needed at the moment. The auxiliary heating device is arranged in a preheating chamber at the upper part of an engine cylinder, is arranged below an oil nozzle, can be heated by passing through a preheating plug when diesel oil is sprayed and atomized, and is easy to explode when oil gas is compressed, so that the cycle of the engine is started, and the normal cycle work of the engine is achieved.
The traditional control mode of the glow plug is a manual control mode, a control circuit is formed by a preheating switch, a preheating relay, a fuse wire and the like, the control circuit for manual preheating is simple, and the maintenance is easy.
With the development of power electronic technology, the types of switch tubes are more and more. The circuit using the power electronic device as the switching tube gradually becomes the trend of circuit design, how to adopt an intelligent switching tube to replace the traditional mechanical switch and the ordinary switch can not only improve the rapidity and the safety of the product, but also can detect the working condition of the glow plug through the feedback of the intelligent switching tube, improve the reliability and the stability of the product, and is the problem which needs to be solved at present.
Disclosure of Invention
The invention aims to solve the problems that the traditional glow plug control mode has larger time randomness, is possible to be insufficiently preheated and difficult to start, and is possible to be excessively preheated to cause damage to the glow plug. The intelligent switching tube-based glow plug controller can remove a glow relay and a fuse wire in the traditional manual control glow plug mode, adopts the intelligent switching tube for replacement, can realize the basic requirements on the work of the glow plug and the state detection on the working condition of the switching tube, has smart circuit, is convenient to realize, and has good application prospect.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preheating plug controller based on an intelligent switching tube comprises a power supply unit, a main circuit unit, a control circuit unit and a feedback unit,
the power supply unit comprises a main circuit power supply subunit and a control circuit power supply subunit, and the main circuit power supply subunit provides working voltage for the main circuit unit, the control circuit unit and the feedback unit; the control circuit power supply subunit provides on-off voltage for the control signal in the control circuit unit;
the main circuit unit comprises an intelligent switching tube and a glow plug which are connected, the intelligent switching tube is used for controlling the on or off of the power supply voltage of the glow plug,
the control circuit unit comprises a logic gate circuit and an SR latch chip which are connected, wherein the logic gate circuit is used for controlling the on-off voltage provided by the control circuit power supply subunit and outputting a control signal for controlling the intelligent switching tube; the SR latch chip is used for latching the working state of the intelligent switching tube;
and the feedback unit is used for respectively providing feedback signals for the main circuit power supply subunit, the control circuit power supply subunit and the control circuit unit and monitoring the working state of the glow plug in real time.
In the glow plug controller based on the intelligent switching tube, a 78L06 voltage stabilizing chip is arranged in the main circuit power supply subunit, and is externally connected with a vehicle-mounted battery with +12V voltage to output +6V working voltage.
The control circuit power supply subunit comprises a voltage stabilizing tube DW and a NOR gate U1, wherein the positive electrode of the voltage stabilizing tube DW is externally connected with a vehicle-mounted battery +12V voltage through a resistor R1, the negative electrode of the voltage stabilizing tube DW is connected with the ground, the positive electrode of the voltage stabilizing tube DW is also connected with two input ends of a NOR gate U1 together, the output end of the NOR gate U1 provides a switching-on and switching-off voltage for a control signal in the control circuit unit, and the voltage stabilizing tube DW is a 5.1V voltage stabilizing tube.
In the intelligent switching tube-based glow plug controller, the model number of the NOR gate U1 is MM74HC 02M.
The intelligent switch tube-based glow plug controller comprises a main circuit unit, a control circuit unit and a control circuit unit, wherein the main circuit unit comprises an intelligent switch tube U2 and a glow plug H1, the control circuit unit comprises a logic gate U3 and an SR latch chip U4,
the logic gate U3 is a NOR gate, one of the input ends of the logic gate U3 is connected with the output end of the NOR gate U1, the other input end of the logic gate U3 is connected with the Q end of the SR latch chip U4, the output end of the logic gate U3 is connected with the input end of the intelligent switch tube U2 through a resistor R2, the first output end of the intelligent switch tube U2 is connected with the preheating plug H1, the second output end of the intelligent switch tube U2 is connected with the S end of the SR latch chip U4, one end of the resistor R4 and one end of the capacitor C1 through a resistor R3, the other end of the resistor R4 is externally connected with a working voltage of +6V, the power supply end of the intelligent switch tube U2 is externally connected with a voltage of +12V, the other end of the capacitor C1 is connected with the ground, the R end of the SR latch chip U4 is connected with the ground through a capacitor C3 and is also externally connected with a working voltage of +, and the Q end of the SR latch chip U4 is also connected with a feedback signal end in a feedback unit.
The feedback unit is used for providing feedback signals for the main circuit power supply subunit, the control circuit power supply subunit and the control circuit unit respectively, and comprises a main circuit power supply subunit feedback circuit, a control circuit power supply subunit feedback circuit and a control circuit unit feedback circuit.
The feedback circuit of the main circuit power supply subunit comprises a voltage regulator tube SF, a nor gate U5 and a triode Q1, wherein the negative electrode of the voltage regulator tube SF is externally connected with +12V voltage through a resistor R6, the positive electrode of the voltage regulator tube SF is connected with the ground, capacitors C4, C5, C6 and a resistor R7 are connected in parallel between the positive electrode and the negative electrode of the voltage regulator tube SF, the negative electrode of the voltage regulator tube SF is also connected with two inputs of the nor gate U5 through a resistor R8, the output end of the nor gate U5 is connected with the base of a triode Q1 through a resistor R9, the emitter of the triode Q1 is connected with the ground, the base of the triode Q1 is also connected with the ground through a resistor R10, two ends of the resistor R10 are connected in parallel with a capacitor C7, the collector of the triode Q1 is externally connected with +6V working voltage through a resistor R11 and a resistor R12, and the resistor R11 is connected with +6V working voltage, The junction of the resistor R12 is connected to ground through a capacitor C8.
The glow plug controller based on the intelligent switching tube comprises a triode Q2, wherein the base of the triode Q2 is connected with the output end of a NOR gate U1 through a resistor R13, the emitter of the triode Q2 is connected with the ground, the base of the triode Q2 is further connected with the ground through a resistor R14, two ends of the resistor R14 are connected in parallel to form a capacitor C9, the collector of the triode Q2 is externally connected with a +6V working voltage through a resistor R15 and a resistor R16, and the connection part of the resistor R15 and the resistor R16 is connected with the ground through a capacitor C10.
The control circuit unit feedback circuit comprises a triode Q3, the base of the triode Q3 is connected with the Q end of an SR latch chip U4 through a resistor R17, the emitter of the triode Q3 is connected with the ground, the base of the triode Q3 is also connected with the ground through a resistor R18, two ends of the resistor R18 are connected in parallel to form a capacitor C11, the collector of the triode Q3 is externally connected with a +6V working voltage through a resistor R19 and a resistor R20, and the connection part of the resistor R19 and the resistor R20 is connected with the ground through a capacitor C12.
The invention has the beneficial effects that: the intelligent switch tube based glow plug controller can remove a glow relay and a fuse wire in the traditional manual control glow plug mode, adopts the replacement of the intelligent switch tube, controls the on and off of the intelligent switch tube, processes a feedback signal of the intelligent switch tube, and locks the working state of the intelligent switch tube, so that the intelligent switch tube cannot recover the operation when the intelligent switch tube is electrified to recover the normal operation condition after the intelligent switch tube fails, the working state of the glow plug can be detected and judged through the voltage value of the feedback voltage, the glow plug and the controller thereof can be conveniently detected and maintained, the basic requirements on the work of the glow plug can be realized, the state detection on the working condition of the switch tube can also be realized, the circuit is ingenious, the realization is convenient, and the glow plug controller has good application prospect.
Drawings
FIG. 1 is a system block diagram of an intelligent tube-switching based glow plug controller of the present invention;
FIG. 2 is a circuit diagram of the main circuit power supply subunit of the present invention;
FIG. 3 is a circuit diagram of the control circuit power supply subunit of the present invention;
fig. 4 is a circuit diagram of a main circuit unit, a control circuit unit of the present invention;
FIG. 5 is a circuit diagram of the main circuit power supply subunit feedback circuit of the present invention;
FIG. 6 is a circuit diagram of the control circuit power supply subunit feedback circuit of the present invention;
fig. 7 is a circuit diagram of a feedback circuit of the control circuit unit of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the glow plug controller based on the intelligent switching tube of the present invention comprises a power supply unit, a main circuit unit, a control circuit unit and a feedback unit,
the power supply unit comprises a main circuit power supply subunit and a control circuit power supply subunit, and the main circuit power supply subunit provides working voltage for the main circuit unit, the control circuit unit and the feedback unit; the control circuit power supply subunit provides on-off voltage for the control signal in the control circuit unit;
the main circuit unit comprises an intelligent switching tube and a glow plug which are connected, the intelligent switching tube is used for controlling the on or off of the power supply voltage of the glow plug,
the control circuit unit comprises a logic gate circuit and an SR latch chip which are connected, wherein the logic gate circuit is used for controlling the on-off voltage provided by the control circuit power supply subunit and outputting a control signal for controlling the intelligent switching tube; the SR latch chip is used for latching the working state of the intelligent switching tube;
and the feedback unit is used for respectively providing feedback signals for the main circuit power supply subunit, the control circuit power supply subunit and the control circuit unit and monitoring the working state of the glow plug in real time.
As shown in fig. 2, a 78L06 voltage stabilization chip is arranged in the main circuit power supply subunit, and is externally connected with a vehicle-mounted battery with +12V voltage to output +6V working voltage, and a specific circuit diagram is shown in fig. 2; as shown in fig. 3, the control circuit power supply subunit includes a voltage regulator tube DW and a nor gate U1, the positive electrode of the voltage regulator tube DW is externally connected to a vehicle-mounted battery +12V voltage through a resistor R1, the negative electrode of the voltage regulator tube DW is connected to ground, the positive electrode of the voltage regulator tube DW is also connected to two input ends of a nor gate U1, the output end of the nor gate U1 provides a turn-on/off voltage for a control signal in the control circuit unit, the voltage regulator tube DW is a 5.1V voltage regulator tube, and the model of the nor gate U1 is preferably MM74HC02M, and the specific working principle is as follows:
the positive electrode of the voltage-regulator tube DW is externally connected with a vehicle-mounted battery +12V through a resistor R1 and is connected to the MM74HC02M NOR gate through a 5.1V voltage-regulator tube DW, when an ignition switch is closed, the voltage of +12V is controlled to be electrically connected, the +5.1V is input into the NOR gate through the 5.1V voltage-regulator tube DW, and when the power supply voltage of the MM74HC02M NOR gate is 6V, the input voltage of more than 4.2V is high level; the input of the NOR gate is lower than 1.8V, namely the low level, at the moment, the input of the NOR gate is high level, and the output of the NOR gate is low level; when the ignition switch is switched off and no power is supplied, the 5.1V voltage-regulator tube DW does not work, the input of the NOR gate is 0V at the moment, the input is low level, and the output is high level.
As shown in fig. 4, the main circuit unit includes an intelligent switch tube U2 and a glow plug H1, the control circuit unit includes a logic gate U3 and an SR latch chip U4,
the logic gate U3 is a NOR gate, one of the input ends of the logic gate U3 is connected with the output end of the NOR gate U1, the other input end of the logic gate U3 is connected with the Q end of the SR latch chip U4, the output end of the logic gate U3 is connected with the input end of the intelligent switch tube U2 through a resistor R2, the first output end of the intelligent switch tube U2 is connected with the preheating plug H1, the second output end of the intelligent switch tube U2 is connected with the S end of the SR latch chip U4, one end of the resistor R4 and one end of the capacitor C1 through a resistor R3, the other end of the resistor R4 is externally connected with a working voltage of +6V, the power supply end of the intelligent switch tube U2 is externally connected with a voltage of +12V, the other end of the capacitor C1 is connected with the ground, the R end of the SR latch chip U4 is connected with the ground through a capacitor C3 and is also externally connected with a working voltage of +, the Q end of the SR latch chip U4 is also connected with a feedback signal end in a feedback unit, and the working principle of the main circuit unit and the control circuit unit is as follows:
(1) when the input of the control circuit unit is at high level, the output is defined as signal1 through the action of the voltage regulator tube and the NOR gate, and signal1 is at low level L; defining the output passing through the SR latch as signal2, and in the initial state, the signal2 is low level L;
(2) through the NOR gate, the output of the NOR gate is high level H, and the input IN of the intelligent switching tube is high level H at the moment;
(3) the input IN of the intelligent switching tube is high level H, the intelligent switching tube is IN a normal conduction state, and the Output is high level H;
(4) at this time, the input of the S end of the SR latch is high level H, the latch is in NO Change state, and the previous state is kept unchanged (low level);
(5) at this time, signal1 is at low level L, signal2 is at low level L, input IN to the smart switch tube is at high level H, and the switch tube is IN a continuous on state.
(6) When the fault occurs to the glow plug and the Output of the intelligent switching tube is disconnected, the intelligent switching tube is IN an idle running state, but the input IN of the intelligent switching tube still keeps a high level H at the moment;
(7) the input IN of the intelligent switching tube is high level H, and the Output is high level H;
(8) at the time, the input of the S end of the SR latch is low level L, the latch is in a state of setting 1, and high level H is output;
(9) at this time, signal1 is at low level L, signal2 is at high level H, input IN to the intelligent switching tube is at low level L, and Output is at high level H;
(10) the input of the S end of the SR latch is low level L, the latch is in a state of setting 1, and high level H is output;
(11) at this time, the glow plug load connection is restored, and the input IN is at the low level L;
(12) the input IN is a low level L, and the Output is a low level L;
(13) at this time, the input of the S end of the SR latch is high level H, the latch is in a NO Change state, the previous state is kept unchanged (high level), and the signal2 is high level H;
(14) at this moment, signal1 is low level L, signal2 is high level H, and it is low level L to give intelligent switching tube input IN, and Output is low level L, and intelligent switching tube still is IN the off-state, can not resume work, realizes switching tube operating condition and latches.
The feedback unit is used for providing feedback signals for the main circuit power supply subunit, the control circuit power supply subunit and the control circuit unit respectively, and comprises a main circuit power supply subunit feedback circuit, a control circuit power supply subunit feedback circuit and a control circuit unit feedback circuit.
As shown in fig. 5, the feedback circuit of the main circuit power supply subunit includes a voltage regulator SF, a nor gate U5, and a triode Q1, wherein a negative electrode of the voltage regulator SF is externally connected with a voltage of +12V through a resistor R6, a positive electrode of the voltage regulator SF is connected with ground, capacitors C4, C5, C6, and a resistor R7 are connected in parallel between the positive electrode and the negative electrode of the voltage regulator SF, the negative electrode of the voltage regulator SF is further connected with two inputs of the nor gate U5 through a resistor R8, an output end of the nor gate U5 is connected with a base of the triode Q1 through a resistor R9, an emitter of the triode Q1 is connected with ground, a base of the triode Q1 is further connected with ground through a resistor R10, two ends of the resistor R10 are connected in parallel with a capacitor C7, a collector of the triode Q1 is externally connected with a working voltage of +6V through a resistor R11 and a resistor R12, a connection of the resistor R11 and the resistor 8 is connected with ground, the working principle is as follows,
an output signal3 of the action of a main current through a voltage regulator tube and an OR not gate is used as an input for generating a main current feedback signal; signal3 is high level H, the NPN type triode is conducted, the divider resistor acts, and the feedback voltage value is the voltage value after voltage division; signal3 is low level L, the NPN type transistor is not turned on, and the voltage dividing resistor does not perform a voltage dividing function. When the ignition switch in the circuit is not started, only the main power is switched on in the circuit, at the moment, each chip can normally operate when power is supplied, the input of the control power is low level L, the signal1 is high level H, the NPN type triode Q1 is switched on, the divider resistance acts, and the feedback voltage value is the voltage value after voltage division.
As shown in fig. 6, the feedback circuit of the power supply subunit of the control circuit comprises a transistor Q2, the base of the transistor Q2 is connected with the output end of the nor gate U1 through a resistor R13, the emitter of the transistor Q2 is connected with ground, the base of the transistor Q2 is further connected with ground through a resistor R14, two ends of the resistor R14 are connected in parallel to form a capacitor C9, the collector of the transistor Q2 is externally connected with a +6V working voltage through a resistor R15 and a resistor R16, the connection between the resistor R15 and the resistor R16 is connected with ground through a capacitor C10, the working principle is as follows,
taking an output signal1 of a control electric through the action of a voltage stabilizing tube and an OR gate as an input for generating a control electric feedback signal; signal1 is high level H, an NPN type triode Q2 is conducted, a voltage dividing resistor acts, and a feedback voltage value is a voltage value after voltage division; signal1 is low level L, the NPN type transistor is not turned on, and the voltage dividing resistor does not perform a voltage dividing function.
As shown in fig. 7, the feedback circuit of the control circuit unit includes a transistor Q3, a base of the transistor Q3 is connected to a Q terminal of an SR latch chip U4 through a resistor R17, an emitter of the transistor Q3 is connected to ground, a base of the transistor Q3 is further connected to ground through a resistor R18, two terminals of the resistor R18 are connected in parallel to form a capacitor C11, a collector of the transistor Q3 is externally connected to a +6V working voltage through a resistor R19 and a resistor R20, a connection point of the resistor R19 and the resistor R20 is connected to ground through a capacitor C12, and the operation principle is as follows,
using SR latch output signal2 as input for generating glow plug feedback signal; signal2 is high level H, the NPN type triode is conducted, the divider resistor acts, and the feedback voltage value is the voltage value after voltage division; signal2 is low level L, NPN type transistor Q3 is not turned on, and the voltage dividing resistor does not perform the voltage dividing function.
According to the feedback unit of the present invention, the test cases are as follows:
TABLE 1 glow plug failure feedback test
| Glow plug shut-off condition | Feedback voltage (V) |
| All-through | 5.16 |
| Open 1 way | 2.63 |
| 2-way disconnection | 1.77 |
| Disconnect 3 way | 1.33 |
| Disconnect 4 ways | 1.09 |
| 5-way disconnection | 0.91 |
In summary, the glow plug controller based on the intelligent switching tube of the present invention can remove the preheating relay and the fuse wire in the traditional manual control glow plug mode, and adopts the replacement of the intelligent switching tube, through the on-off control of the intelligent switching tube and the processing of the feedback signal of the intelligent switching tube, and through the design of locking the working state of the intelligent switching tube, when the intelligent switching tube is electrified to recover the normal operation condition after the fault occurs, the intelligent switching tube cannot recover the operation, and the working state of the glow plug can be detected and judged through the voltage value of the feedback voltage, so as to facilitate the detection and maintenance of the glow plug and the controller thereof, thereby not only realizing the basic requirement on the operation of the glow plug, but also realizing the state detection on the working condition of the switching tube, and having ingenious circuit, convenient realization and good application prospect.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. Glow plug controller based on intelligence switch tube, its characterized in that: comprises a power supply unit, a main circuit unit, a control circuit unit and a feedback unit,
the power supply unit comprises a main circuit power supply subunit and a control circuit power supply subunit, and the main circuit power supply subunit provides working voltage for the main circuit unit, the control circuit unit and the feedback unit; the control circuit power supply subunit provides on-off voltage for the control signal in the control circuit unit;
the main circuit unit comprises an intelligent switching tube and a glow plug which are connected, the intelligent switching tube is used for controlling the on or off of the power supply voltage of the glow plug,
the control circuit unit comprises a logic gate circuit and an SR latch chip which are connected, wherein the logic gate circuit is used for controlling the on-off voltage provided by the control circuit power supply subunit and outputting a control signal for controlling the intelligent switching tube; the SR latch chip is used for latching the working state of the intelligent switching tube;
and the feedback unit is used for respectively providing feedback signals for the main circuit power supply subunit, the control circuit power supply subunit and the control circuit unit and monitoring the working state of the glow plug in real time.
2. The intelligent switching tube based glow plug controller of claim 1, wherein: and a 78L06 voltage stabilizing chip is arranged in the main circuit power supply subunit, is externally connected with a vehicle-mounted battery with +12V voltage and outputs +6V working voltage.
3. The intelligent switching tube based glow plug controller of claim 1, wherein: the control circuit power supply subunit comprises a voltage stabilizing tube DW and a NOR gate U1, wherein the positive electrode of the voltage stabilizing tube DW is externally connected with a vehicle-mounted battery +12V voltage through a resistor R1, the negative electrode of the voltage stabilizing tube DW is connected with the ground, the positive electrode of the voltage stabilizing tube DW is also connected with two input ends of a NOR gate U1 together, the output end of the NOR gate U1 provides a switching-on and switching-off voltage for a control signal in the control circuit unit, and the voltage stabilizing tube DW is a 5.1V voltage stabilizing tube.
4. The intelligent switching tube based glow plug controller of claim 3, wherein: the model of the NOR gate U1 is MM74HC 02M.
5. The intelligent switching tube based glow plug controller of claim 3, wherein: the main circuit unit comprises an intelligent switch tube U2 and a glow plug H1, the control circuit unit comprises a logic gate U3 and an SR latch chip U4,
the logic gate U3 is a NOR gate, one of the input ends of the logic gate U3 is connected with the output end of the NOR gate U1, the other input end of the logic gate U3 is connected with the Q end of the SR latch chip U4, the output end of the logic gate U3 is connected with the input end of the intelligent switch tube U2 through a resistor R2, the first output end of the intelligent switch tube U2 is connected with the preheating plug H1, the second output end of the intelligent switch tube U2 is connected with the S end of the SR latch chip U4, one end of the resistor R4 and one end of the capacitor C1 through a resistor R3, the other end of the resistor R4 is externally connected with a working voltage of +6V, the power supply end of the intelligent switch tube U2 is externally connected with a voltage of +12V, the other end of the capacitor C1 is connected with the ground, the R end of the SR latch chip U4 is connected with the ground through a capacitor C3 and is also externally connected with a working voltage of +, and the Q end of the SR latch chip U4 is also connected with a feedback signal end in a feedback unit.
6. The intelligent switching tube based glow plug controller of claim 5, wherein: the feedback unit is used for providing feedback signals for the main circuit power supply subunit, the control circuit power supply subunit and the control circuit unit respectively, and comprises a main circuit power supply subunit feedback circuit, a control circuit power supply subunit feedback circuit and a control circuit unit feedback circuit.
7. The intelligent switching tube based glow plug controller of claim 6, wherein: the feedback circuit of the main circuit power supply subunit comprises a voltage regulator SF, a NOR gate U5 and a triode Q1, the negative electrode of the voltage-stabilizing tube SF is externally connected with +12V voltage through a resistor R6, the positive electrode of the voltage-stabilizing tube SF is connected with the ground, capacitors C4, C5, C6 and a resistor R7 are connected in parallel between the positive electrode and the negative electrode of the voltage regulator tube SF, the cathode of the voltage regulator tube SF is also connected with two inputs of the nor gate U5 through a resistor R8, the output end of the NOR gate U5 is connected with the base electrode of a triode Q1 through a resistor R9, the emitter electrode of the triode Q1 is connected with the ground, the base of the triode Q1 is also connected with the ground through a resistor R10, two ends of the resistor R10 are connected in parallel to form a capacitor C7, the collector of the triode Q1 is externally connected with +6V working voltage through a resistor R11 and a resistor R12, and the joint of the resistor R11 and the resistor R12 is connected with the ground through a capacitor C8.
8. The intelligent switching tube based glow plug controller of claim 6, wherein: the feedback circuit of the control circuit power supply subunit comprises a triode Q2, wherein the base of the triode Q2 is connected with the output end of a NOR gate U1 through a resistor R13, the emitter of the triode Q2 is connected with the ground, the base of the triode Q2 is also connected with the ground through a resistor R14, two ends of the resistor R14 are connected in parallel to form a capacitor C9, the collector of the triode Q2 is connected with +6V working voltage through a resistor R15 and a resistor R16 in an external mode, and the connection position of the resistor R15 and the resistor R16 is connected with the ground through a capacitor C10.
9. The intelligent switching tube based glow plug controller of claim 6, wherein: the feedback circuit of the control circuit unit comprises a triode Q3, the base of the triode Q3 is connected with the Q end of an SR latch chip U4 through a resistor R17, the emitter of the triode Q3 is connected with the ground, the base of the triode Q3 is also connected with the ground through a resistor R18, two ends of the resistor R18 are connected in parallel to form a capacitor C11, the collector of the triode Q3 is externally connected with a +6V working voltage through a resistor R19 and a resistor R20, and the connection position of the resistor R19 and the resistor R20 is connected with the ground through a capacitor C12.
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| CN201911136476.7A CN110657056B (en) | 2019-11-19 | 2019-11-19 | Glow plug controller based on intelligent switching tube |
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| CN201911136476.7A CN110657056B (en) | 2019-11-19 | 2019-11-19 | Glow plug controller based on intelligent switching tube |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035183A (en) * | 2010-12-31 | 2011-04-27 | 常州赛莱德科技有限公司 | Protection circuit for switching power supply |
| CN201937236U (en) * | 2011-02-16 | 2011-08-17 | Bcd半导体制造有限公司 | Locking type short-circuit protection circuit in vehicle electronic system |
| CN203747366U (en) * | 2014-01-27 | 2014-07-30 | 长城汽车股份有限公司 | Preheating relay |
| CN203942267U (en) * | 2014-06-27 | 2014-11-12 | 河北朗天信息科技有限公司 | A kind of quick breaking circuit based on current mode integrated manipulator |
| CN209169940U (en) * | 2018-11-12 | 2019-07-26 | 北京大豪科技股份有限公司 | Overcurrent-overvoltage protecting circuit |
-
2019
- 2019-11-19 CN CN201911136476.7A patent/CN110657056B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035183A (en) * | 2010-12-31 | 2011-04-27 | 常州赛莱德科技有限公司 | Protection circuit for switching power supply |
| CN201937236U (en) * | 2011-02-16 | 2011-08-17 | Bcd半导体制造有限公司 | Locking type short-circuit protection circuit in vehicle electronic system |
| CN203747366U (en) * | 2014-01-27 | 2014-07-30 | 长城汽车股份有限公司 | Preheating relay |
| CN203942267U (en) * | 2014-06-27 | 2014-11-12 | 河北朗天信息科技有限公司 | A kind of quick breaking circuit based on current mode integrated manipulator |
| CN209169940U (en) * | 2018-11-12 | 2019-07-26 | 北京大豪科技股份有限公司 | Overcurrent-overvoltage protecting circuit |
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| Publication number | Publication date |
|---|---|
| CN110657056B (en) | 2021-05-14 |
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