CN202073678U - Protection circuit for automobile starting motor - Google Patents
Protection circuit for automobile starting motor Download PDFInfo
- Publication number
- CN202073678U CN202073678U CN 201120144353 CN201120144353U CN202073678U CN 202073678 U CN202073678 U CN 202073678U CN 201120144353 CN201120144353 CN 201120144353 CN 201120144353 U CN201120144353 U CN 201120144353U CN 202073678 U CN202073678 U CN 202073678U
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- relay
- starting motor
- power supply
- output terminal
- engine
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Abstract
The utility model provides a protection circuit for an automobile starting motor. The protection circuit for the automobile starting motor comprises four relays, wherein the first input end of each relay is connected with a micro control unit (MCU); the first output end of each relay is connected with a vehicle-mounted power supply; the second output end of the first relay RY1 is connected with a starting motor; the second output end of the second relay RY2 is connected with an engine power supply 2; the second output end of the third relay RY3 is connected with an engine power supply 1; the second output end of the fourth relay RY4 is connected with a vehicle-mounted power supply ACC; the second input ends of the second, the third and the fourth relays are connected with a vehicle-mounted power supply ground wire VCC respectively; and the second input end of the first relay RY1 is connected with the first output end of the second relay RY2. Repeated ignition failure in the running process of an engine is avoided, so that the engine and the starting motor are protected.
Description
Technical field
The utility model relates to a kind of circuit, relates in particular to the protective circuit of automobile one key start-up system starting motor.
Background technique
An existing key start main rely on SCM program self regularly, to realize the IGNITION CONTROL of engine cranking motor, realize the function of protection motor.Existing starting motor control principle as shown in Figure 1, can see, the relay R Y1 that the control starting motor relies on firing time fully grasps pickup time, and RY1 is by MCU (U2) timing controlled, if in the automobile driving process, MCU is interfered, make the RY1 action, A point (connecing starting motor) is directly connected and relight with vehicle power, will cause the damage of starting motor and motor.
Summary of the invention
In order to solve the problems of the prior art, the utility model provides a kind of automobile starting motor protective circuit.
A kind of automobile starting motor protective circuit; it comprises the first relay R Y1; the second relay R Y2; the 3rd relay R Y3; the 4th relay R Y4; each relay comprises first; the second two input ends and first; the second two output terminals; the first input end of each relay and micro-control unit MCU connect; first output terminal and the power connection of each relay; second output terminal of the described first relay R Y1 and starting motor are connected; second output terminal of the described second relay R Y2 and engine power supply 2 are connected; second output terminal of described the 3rd relay R Y3 and engine power supply 1 are connected; second output terminal and the power connection of described the 4th relay R Y4; described second; the 3rd; second input end of the 4th relay is connected with ground wire respectively, and first output terminal of second input end of the described first relay R Y1 and the described second relay R Y2 is connected.
As described power source voltage of the present utility model is vehicle power voltage.
As further improvement of the utility model, the first input end of each relay is connected by drive circuit and micro-control unit MCU.
As further improvement of the utility model, described ground wire is the ground wire of vehicle power.
The beneficial effects of the utility model are: the utility model is started with from circuit design; by changing circuit structure design; make the relay of control engine cranking motor power supply be controlled by motoring condition; the fault that relight in the engine operation process no longer occurs has been protected motor and starting motor.
[description of drawings]
Fig. 1 is the prior art starting circuit;
Fig. 2 is the utility model automobile starting motor protective circuit.
[embodiment]
Below in conjunction with description of drawings and embodiment the utility model is further specified.
As shown in Figure 2; a kind of automobile starting motor protective circuit; it comprises the first relay R Y1; the second relay R Y2; the 3rd relay R Y3; the 4th relay R Y4; each relay comprises first; the second two input ends and first; the second two output terminals; the first input end of each relay is connected by drive circuit and micro-control unit MCU; first output terminal of each relay and vehicle power are connected the live wire of ACC(vehicle power); second output terminal of the described first relay R Y1 and starting motor are connected; second output terminal of the described second relay R Y2 and engine power supply 2 are connected; second output terminal of described the 3rd relay R Y3 and engine power supply 1 are connected; second output terminal of described the 4th relay R Y4 and vehicle power ACC connect; described second; the 3rd; second input end of the 4th relay is connected with vehicle power ground wire VCC respectively, and first output terminal of second input end of the described first relay R Y1 and the described second relay R Y2 is connected.
The purpose of this utility model is, after engine start, the supply disconnecton of relay that will control engine ignition motor, design as shown in Figure 2, its working principle is, as user during by next key start button, the circuit output principle is:
1. relay R Y4 adhesive makes D contact among the ACC(figure) connect with vehicle power ACC;
2. relay R Y3 adhesive, C contact among the engine power supply 1(figure) connect with vehicle power ACC;
3. relay R Y1 adhesive, starting motor power supply (A contact among the figure) is connected with vehicle power ACC
This moment, starting motor ignition trigger motor after system detects engine start, was carried out the 4th point;
4. relay R Y2 adhesive, B contact among the engine power supply 2(figure) connect with vehicle power ACC.When 2 outputs of engine power supply; the relay R Y1 power supply of control starting motor power supply is thoroughly cut off; no matter which kind of state MCU exports to the starting motor control signal; the starting motor power line all can't be connected vehicle power; not that is to say to duplicate the igniting phenomenon, thereby protect out motor and starting motor.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (4)
1. automobile starting motor protective circuit; it is characterized in that: it comprises the first relay R Y1; the second relay R Y2; the 3rd relay R Y3; the 4th relay R Y4; each relay comprises first; the second two input ends and first; the second two output terminals; the first input end of each relay and micro-control unit MCU connect; first output terminal and the power connection of each relay; second output terminal of the described first relay R Y1 and starting motor are connected; second output terminal of the described second relay R Y2 and engine power supply 2 are connected; second output terminal of described the 3rd relay R Y3 and engine power supply 1 are connected; second output terminal and the power connection of described the 4th relay R Y4; described second; the 3rd; second input end of the 4th relay is connected with ground wire respectively, and first output terminal of second input end of the described first relay R Y1 and the described second relay R Y2 is connected.
2. automobile starting motor protective circuit according to claim 1 is characterized in that: described power source voltage is vehicle-mounted voltage.
3. automobile starting motor protective circuit according to claim 1 is characterized in that: the first input end of each relay is connected by drive circuit and micro-control unit MCU.
4. automobile starting motor protective circuit according to claim 1 is characterized in that: described ground wire is the ground wire of vehicle power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120144353 CN202073678U (en) | 2011-05-09 | 2011-05-09 | Protection circuit for automobile starting motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120144353 CN202073678U (en) | 2011-05-09 | 2011-05-09 | Protection circuit for automobile starting motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202073678U true CN202073678U (en) | 2011-12-14 |
Family
ID=45111782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120144353 Expired - Lifetime CN202073678U (en) | 2011-05-09 | 2011-05-09 | Protection circuit for automobile starting motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202073678U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828880A (en) * | 2012-08-21 | 2012-12-19 | 江苏云意电气股份有限公司 | Automobile starting protector |
-
2011
- 2011-05-09 CN CN 201120144353 patent/CN202073678U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102828880A (en) * | 2012-08-21 | 2012-12-19 | 江苏云意电气股份有限公司 | Automobile starting protector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111214 |
|
| CX01 | Expiry of patent term |