CN220930324U - Control circuit of gear shifting electromagnetic valve - Google Patents
Control circuit of gear shifting electromagnetic valve Download PDFInfo
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- CN220930324U CN220930324U CN202322462519.9U CN202322462519U CN220930324U CN 220930324 U CN220930324 U CN 220930324U CN 202322462519 U CN202322462519 U CN 202322462519U CN 220930324 U CN220930324 U CN 220930324U
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- mos tube
- electromagnetic valve
- ground
- control circuit
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- 239000003990 capacitor Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Abstract
The utility model belongs to the field of control circuits, and particularly relates to a control circuit of a gear shifting electromagnetic valve. The power supply comprises a Mos tube which is used for realizing power supply conduction and grounding or realizing power supply high-level output. The Mos tube is respectively connected with the input command interface, the output high-level interface and the electromagnetic valve ground, when the input command interface inputs high level to the Mos tube, the Mos tube enables the output high-level interface and the electromagnetic valve ground to be conducted and grounded, and when the input command interface inputs low level to the Mos tube, the Mos tube is disconnected, and the control command is not responded. The diode is connected in series between the Mos tube and the output high-level interface, so that on one hand, the diode can be used for preventing reverse connection of a circuit, and on the other hand, the diode can be used for preventing the circuit from generating reverse induced electromotive force to cause chip breakdown at the moment of switching on and switching off of the electromagnetic valve, and the electromagnetic valve is prevented from being damaged.
Description
Technical Field
The utility model belongs to the field of control circuits, and particularly relates to a control circuit of a gear shifting electromagnetic valve.
Background
The control chip of an electromagnetic valve used on a pneumatic gear shifting actuating mechanism of a general transmission or a power takeoff is generally the switching value of the high side and the low side. The electromagnetic valve is controlled to be opened and closed by controlling the energization or the outage of different pins of the chip, but the generation of counter electromotive force is often accompanied at the moment of the energization or the outage of the chip. As shown in fig. 2, a command CMD for driving the solenoid valve is transmitted to the solenoid valve control chip through a CAN line or a hard line, and the chip directly outputs a high level through an output pin VBAT after receiving the command, thereby controlling the opening and closing of the solenoid valve. The whole control circuit is not provided with a corresponding inductance element for preventing counter electromotive force, and when the counter electromotive force generated by the electromagnetic valve is larger than the rated voltage of the electromagnetic valve control chip, the chip breaks down, so that the whole electromagnetic valve is damaged.
Disclosure of utility model
In order to overcome the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a control circuit for a shift solenoid valve, which can prevent a chip from being broken down when a counter electromotive force is generated in the solenoid valve.
In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:
The utility model discloses a control circuit of a gear shifting electromagnetic valve, which comprises a Mos tube, wherein the Mos tube is respectively connected with an input command interface, an output high-level interface and an electromagnetic valve ground, and a diode is connected in series between the Mos tube and the output high-level interface.
Further, the Mos tube comprises a grounding interface, a control level interface, an input interface and an output interface, wherein the grounding interface is connected with a ground wire, the control level interface is connected with an input command interface, the input interface is connected with an electromagnetic valve ground, and the output interface is connected with a diode.
Further, a current limiting resistor is connected in series between the input command interface and the control stage interface.
Further, voltage monitoring interfaces are arranged at two ends of the current limiting resistor.
Further, a triode is connected between the current limiting resistor and the control level interface, one stage of the triode is directly grounded, the other stage of the triode is grounded through the first protection resistor and the second protection resistor, and the grounding interface is connected between the first protection resistor and the second protection resistor.
Further, a current sampling resistor is connected in series between the input interface and the ground of the electromagnetic valve.
Further, the electromagnetic valve ground is connected with the ground wire, and a filter capacitor is connected in series between the electromagnetic valve ground and the ground wire. Further, a test connection point is arranged between the output interface and the diode.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model discloses a control circuit of a shift electromagnetic valve, which comprises a Mos tube, wherein the Mos tube is used for realizing power conduction and grounding or realizing high-level output of a power supply. The Mos tube is respectively connected with the input command interface, the output high-level interface and the electromagnetic valve ground, when the input command interface inputs high level to the Mos tube, the Mos tube enables the output high-level interface and the electromagnetic valve ground to be conducted and grounded, and when the input command interface inputs low level to the Mos tube, the Mos tube is disconnected, and the control command is not responded. The diode is connected in series between the Mos tube and the output high-level interface, so that on one hand, the diode can be used for preventing reverse connection of a circuit, and on the other hand, the diode can be used for preventing the circuit from generating reverse induced electromotive force to cause chip breakdown at the moment of switching on and switching off of the electromagnetic valve, and the electromagnetic valve is prevented from being damaged.
Drawings
FIG. 1 is a circuit diagram of the present utility model;
Fig. 2 is a diagram of an original chip connection.
Wherein: 1. inputting a command interface; a 2 diode; 3. a ground interface; 4. a control level interface; 5. an input interface; 6. an output interface; 7. a Mos tube; 8. outputting a high level interface; 9. the electromagnetic valve is grounded; 10. a current limiting resistor; 11. a triode; 12. a first protection resistor; 13. and a second protection resistor.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The utility model is described in further detail below with reference to the attached drawing figures:
Referring to fig. 1, the utility model discloses a control circuit of a shift electromagnetic valve, which comprises a Mos tube 7, wherein the Mos tube 7 is respectively connected with an input command interface 1, an output high-level interface 8 and an electromagnetic valve ground 9, and a diode 2 is connected in series between the Mos tube 7 and the output high-level interface 8.
In another possible embodiment of the utility model, see fig. 1, the following is adapted as the case may be. The utility model comprises a Mos tube 7, wherein the Mos tube 7 is used for realizing power supply on-ground or realizing power supply high-level output. The Mos tube 7 is respectively connected with the input command interface 1, the output high level interface 8 and the electromagnetic valve ground 9, when the input command interface 1 inputs high level to the Mos tube 7, the Mos tube 7 enables the output high level interface 8 and the electromagnetic valve ground 9 to be conducted and grounded, so that the purpose of enabling the electromagnetic valve is achieved. When the input command interface 1 inputs a low level to the Mos pipe 7, the Mos pipe 7 is opened, and the control command does not respond. The diode 2 is connected in series between the Mos tube 7 and the output high-level interface 8, so that on one hand, the circuit can be prevented from being reversely connected, and on the other hand, the circuit can be prevented from generating reverse induced electromotive force to cause chip breakdown when the electromagnetic valve is powered on and off, and the electromagnetic valve is prevented from being damaged. The whole circuit optimizes the electromagnetic valve control from a switch mode to analog quantity control, so that the electromagnetic valve can be conducted according to 0-100%, and the electromagnetic valve is flexibly controlled and protected.
First preferred embodiment:
Referring to fig. 1, the utility model discloses a control circuit of a shift electromagnetic valve, which comprises a Mos tube 7, wherein the Mos tube 7 is respectively connected with an input command interface 1, an output high-level interface 8 and an electromagnetic valve ground 9, and a diode 2 is connected in series between the Mos tube 7 and the output high-level interface 8. The Mos tube 7 is used for realizing power supply on-ground or power supply high-level output. When the input command interface 1 inputs a high level to the Mos tube 7, the Mos tube 7 turns on the power supply to the ground, and when the input command interface 1 inputs a low level to the Mos tube 7, the Mos tube 7 turns off to output a high level of the power supply. The diode 2 is connected in series between the Mos tube 7 and the output high-level interface 8, so that on one hand, the circuit can be prevented from being reversely connected, and on the other hand, the circuit can be prevented from generating reverse induced electromotive force to cause chip breakdown when the electromagnetic valve is powered on and off, and the electromagnetic valve is prevented from being damaged.
Preferably, referring to fig. 1, the mos tube 7 includes a ground interface 3, a control level interface 4, an input interface 5, and an output interface 6, the ground interface 3 is connected to a ground line, the control level interface 4 is connected to the input command interface 1, the input interface 5 is connected to the solenoid valve ground 9, and the output interface 6 is connected to the diode 2.
Second preferred embodiment:
referring to fig. 1, based on the above embodiment, a current limiting resistor 10 is connected in series between the input command interface 1 and the control stage interface 4.
The voltage monitoring interfaces are arranged at the two ends of the current limiting resistor 10.
The triode 11 is connected between the current limiting resistor 10 and the control level interface 4, one stage of the triode 11 is directly grounded, the other stage of the triode 11 is grounded through the first protection resistor 12 and the second protection resistor 13, and the grounding interface 3 is connected between the first protection resistor 12 and the second protection resistor 13.
A current sampling resistor is connected in series between the input interface 5 and the solenoid valve ground 9.
The electromagnetic valve ground 9 is connected with a ground wire, and a filter capacitor is connected in series between the electromagnetic valve ground 9 and the ground wire.
A test connection point is arranged between the output interface 6 and the diode 2.
The utility model adopts a PWM control mode for controlling the electromagnetic valve, the principle is as shown in figure 1, a reflux diode is arranged between an instruction for driving the electromagnetic valve and the output high level in the whole transmission process, and the current cannot be reversely transmitted due to the existence of the diode, so that the influence of back electromotive force on the electromagnetic valve is avoided.
The above is only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present utility model falls within the protection scope of the claims of the present utility model.
Claims (8)
1. A control circuit of a gear shifting electromagnetic valve is characterized by comprising a Mos tube (7), wherein the Mos tube (7) is respectively connected with an input command interface (1), an output high-level interface (8) and an electromagnetic valve ground (9), and a diode (2) is connected in series between the Mos tube (7) and the output high-level interface (8).
2. A control circuit for a shift solenoid valve according to claim 1, characterised in that said Mos tube (7) comprises a ground interface (3), a control stage interface (4), an input interface (5) and an output interface (6), the ground interface (3) being connected to ground, the control stage interface (4) being connected to the input command interface (1), the input interface (5) being connected to the solenoid valve ground (9), the output interface (6) being connected to the diode (2).
3. Control circuit of a shift solenoid valve according to claim 2, characterised in that a current limiting resistor (10) is connected in series between the input command interface (1) and the control stage interface (4).
4. A control circuit for a shift solenoid valve according to claim 3, characterised in that the current limiting resistor (10) is provided with a voltage monitoring interface across it.
5. A control circuit for a shift solenoid valve as claimed in claim 4, characterised in that a transistor (11) is connected between the current limiting resistor (10) and the control stage interface (4), one stage of the transistor (11) is directly grounded, the other stage of the transistor (11) is grounded via a first protection resistor (12) and a second protection resistor (13), and a ground interface (3) is connected between the first protection resistor (12) and the second protection resistor (13).
6. Control circuit of a shifting solenoid valve according to claim 2, characterised in that a current sampling resistor is connected in series between the input interface (5) and the solenoid valve ground (9).
7. A control circuit for a shift solenoid valve according to claim 6, characterised in that the solenoid valve ground (9) is connected to ground, and a filter capacitor is connected in series between the solenoid valve ground (9) and ground.
8. Control circuit of a shift solenoid valve according to claim 2, characterised in that a test connection point is provided between the output interface (6) and the diode (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322462519.9U CN220930324U (en) | 2023-09-11 | 2023-09-11 | Control circuit of gear shifting electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322462519.9U CN220930324U (en) | 2023-09-11 | 2023-09-11 | Control circuit of gear shifting electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220930324U true CN220930324U (en) | 2024-05-10 |
Family
ID=90969613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322462519.9U Active CN220930324U (en) | 2023-09-11 | 2023-09-11 | Control circuit of gear shifting electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220930324U (en) |
-
2023
- 2023-09-11 CN CN202322462519.9U patent/CN220930324U/en active Active
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