CN207349000U - A kind of engine start circuit and automobile - Google Patents
A kind of engine start circuit and automobile Download PDFInfo
- Publication number
- CN207349000U CN207349000U CN201721400006.3U CN201721400006U CN207349000U CN 207349000 U CN207349000 U CN 207349000U CN 201721400006 U CN201721400006 U CN 201721400006U CN 207349000 U CN207349000 U CN 207349000U
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- engine start
- relay
- start circuit
- electrically connected
- control unit
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Abstract
The utility model provides a kind of engine start circuit and automobile, wherein, engine start circuit includes power supply, ignition switch, protective relay, vehicle body control unit, starting relay and motor circuit, wherein, the input terminal of the ignition switch is electrically connected with the output terminal of the power supply, the output terminal of the ignition switch is electrically connected with the movable contact of the protective relay and the input terminal of the vehicle body control unit respectively, the normally-closed contact of the protective relay is electrically connected with a coil terminals of the starting relay, the movable contact of the starting relay and the power electric connection, the normally opened contact of the starting relay is electrically connected with the input terminal of the motor circuit.Engine start circuit provided by the utility model plays the role of the backward voltage breakdown for preventing vehicle body control unit to be activated relay.
Description
Technical field
It the utility model is related to technical field of automobile design, more particularly to a kind of engine start circuit and automobile.
Background technology
With the rapid development of economy, the living standard and the level of consumption of people are continuously improved, automobile is as a kind of quick
Easily the vehicles have slowly become the trip instrument of more and more families.At present, the ignition switch of automobile has multiple open
Gear is closed, the function that user can use under different gears is different, and the output terminal of vehicle body control unit and ignition switch is electrically connected
After connecing, user can be by being operable to vehicle body control unit to use corresponding function.
In the prior art, referring to Fig. 1, the input of vehicle body control unit 110 is terminated at protective relay 120 by automobile
Between the coil terminals of normally-closed contact and starting relay 130, in this case, if 120 action launching relay of protective relay
Magnetic field of the device 130 inside the moment of dead electricity, starting relay 130 changes, according to electromagnetic laws, when changes of magnetic field,
Neighbouring conductor can produce the inverse electromotive force of the voltage contrast at the coil both ends with being added in starting relay 130 before.
The backward voltage ratio for the inverse electromotive force that the moment produces be before several times of supply voltage even more than ten times.Referring to Fig. 2, should
Inverse electromotive force can cause the pin quilt for the vehicle body control unit 110 being connected in circuit with the coil terminals of starting relay 130
Puncture or burn out, influence the normal use of vehicle body control unit 110.
Utility model content
The utility model embodiment provides a kind of engine start circuit and automobile, is being protected with solving some automobiles at present
The actuating of relay is to the moment of starting relay dead electricity, the inverse electromotive force breakdown or burn out connected that starting relay inside produces
Vehicle body control unit the problem of.
In a first aspect, the utility model embodiment provides a kind of engine start circuit, including power supply, ignition switch, guarantor
Protect relay, vehicle body control unit, starting relay and motor circuit, wherein, the input terminal of the ignition switch with it is described
The output terminal of power supply is electrically connected, the output terminal of the ignition switch movable contact with the protective relay and the vehicle body respectively
The input terminal of control unit is electrically connected, the coil terminals electricity of the normally-closed contact of the protective relay and the starting relay
Connection, the movable contact of the starting relay and the power electric connection, the normally opened contact of the starting relay and the hair
The input terminal of motivation circuit is electrically connected.
Optionally, the engine start circuit further includes control unit of engine, two lines of the protective relay
Circle terminal is electrically connected with the control unit of engine.
Optionally, the engine start circuit further includes neutral switch, the neutral switch be serially connected with the protection after
Between the normally-closed contact of electric appliance and a coil terminals of the starting relay.
Optionally, the engine start circuit further includes fuse, and the fuse is serially connected with the output of the power supply
Between end and the input terminal of the ignition switch.
Optionally, the engine start circuit further includes diode, the anode of the diode and the ignition switch
Output terminal be electrically connected, the cathode of the diode is electrically connected with the input terminal of the vehicle body control unit.
Second aspect, the utility model embodiment also provide a kind of automobile, and the automobile includes engine as described above
Start-up circuit.
In the utility model embodiment, engine start circuit includes power supply, ignition switch, protective relay, vehicle body control
Unit, starting relay and motor circuit processed, wherein, the input terminal of the ignition switch and the output terminal of the power supply are electrically connected
Connect, the output terminal of the ignition switch respectively with the movable contact of the protective relay and the input terminal of the vehicle body control unit
Be electrically connected, the normally-closed contact of the protective relay is electrically connected with a coil terminals of the starting relay, the startup after
The movable contact of electric appliance and the power electric connection, the input terminal of the normally opened contact of the starting relay and the motor circuit
It is electrically connected.Thus, after protective relay action, vehicle body control unit is no longer connected with the coil terminals of starting relay, from
And avoid being activated the inverse electromotive force breakdown produced inside relay or burn out, play the work of protection vehicle body control unit
With.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the utility model embodiment, the utility model embodiment will be retouched below
Attached drawing is briefly described needed in stating, it should be apparent that, drawings in the following description are only the utility model
Some embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the engine start circuit diagram of automobile in the prior art；
Fig. 2 is the voltage curve of the vehicle body control unit in starting relay dead electricity in the prior art；
Fig. 3 is a kind of structure diagram for engine start circuit that the utility model embodiment provides；
Fig. 4 is a kind of engine start circuit vehicle body control in starting relay dead electricity that the utility model embodiment provides
The voltage curve of unit processed.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is the utility model part of the embodiment, rather than whole implementation
Example.Based on the embodiment in the utility model, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to Fig. 3, Fig. 3 is a kind of structure diagram for engine start circuit that the utility model embodiment provides.
The utility model embodiment provides a kind of engine start circuit, including power supply, ignition switch 20, protective relay 30, vehicle body
Control unit 40, starting relay 50 and motor circuit 60, wherein, input terminal and the power supply of the ignition switch 20
Output terminal is electrically connected, the output terminal movable contact with the protective relay 30 and the vehicle body control respectively of the ignition switch 20
The input terminal of unit 40 processed is electrically connected, a coil-end of the normally-closed contact of the protective relay 30 and the starting relay 50
Son is electrically connected, movable contact and the power electric connection of the starting relay 50, the normally opened contact of the starting relay 50
It is electrically connected with the input terminal of the motor circuit 60.
In the present embodiment, protective relay 30 and starting relay 50 include movable contact, normally-closed contact, normally opened contact and
Coil, coil must not electricity in the case of movable contact be electrically connected with normally-closed contact；Movable contact and normally opened contact when coil obtains electric
It is electrically connected.The normally opened contact of protective relay 30 is electrically connected with ground terminal.After user is by the way that ignition switch 20 is opened, power supply
It is electric that electric current by protective relay 30 makes the coil of starting relay 50 obtain, the coil of starting relay 50 obtain it is electric after produce magnetic field
Movable contact in control starting relay 50 is electrically connected with normally opened contact, is made motor circuit 60 obtain electric energy and is started.
When protective relay 30 acts, i.e. the coil of protective relay 30 obtain cable order movable contact and normally-closed contact disconnect and
It is connected with normally opened contact, the coil losing electricity of starting relay 50, produces inverse electromotive force.At this time, moving because of protective relay 30
Contact is disconnected with normally-closed contact, and inverse electromotive force can not be flowed at vehicle body control unit 40, so as to play protection vehicle body control
The effect of unit 40 processed.Fig. 4 is please referred to, Fig. 4 is that a kind of engine start circuit that the utility model embodiment provides exists
The voltage curve of vehicle body control unit during starting relay dead electricity.
In the present embodiment, after the action of protective relay 30, line of the vehicle body control unit 40 no longer with starting relay 50
Terminal connection is enclosed, so as to avoid being activated the inverse electromotive force breakdown of the inside of relay 50 generation or burn out, plays protection car
The effect of body control unit 40.
Optionally, the engine start circuit further includes control unit of engine 70, and the two of the protective relay 30
A coil terminals are electrically connected with the control unit of engine 70.
In the present embodiment, control unit of engine 70 monitors the operation conditions of motor circuit 60 in real time, is starting electromechanics
Output current obtains the coil of protective relay 30 electric when road 60 is abnormal, and makes the movable contact of protective relay 30 be touched with normally closed
Point is disconnected and is connected with normally opened contact, so that 60 dead electricity of the coil of starting relay 50 and motor circuit, avoids engine
Work in exception.
Optionally, the engine start circuit further includes neutral switch, the neutral switch be serially connected with the protection after
Between the normally-closed contact of electric appliance 30 and the first coil terminal of the starting relay 50.
Automobile is in neutral gear, the indoor lubricating oil pump of gear cavity not pump oil, if user starts engine under neutral gear and makes automobile
When sliding, the damage between gear can be caused.Therefore, to avoid automobile from starting engine under neutral gear in the present embodiment, and incite somebody to action
Neutral switch is serially connected between the normally-closed contact of protective relay 30 and a coil terminals of starting relay 50, in automobile neutral gear
When disconnect protective relay 30 normally-closed contact and starting relay 50 a coil terminals between connection, so as to ensure
Automobile can not start engine under neutral gear, avoid the problem that the neutral gears such as the damage between gear travel.
Optionally, the engine start circuit further includes fuse, and the fuse is serially connected with the output of the power supply
Between end and the input terminal of the ignition switch 20.In the present embodiment, in the output terminal and the input terminal of ignition switch 20 of power supply
Between add fuse, avoid circuit where it that short-circuit or overcurrent occurs, protect each component in circuit not by
Burn out.
Optionally, the engine start circuit further includes diode, the anode of the diode and the ignition switch
Output terminal be electrically connected, the cathode of the diode is electrically connected with the input terminal of the vehicle body control unit.
In the present embodiment, to ensure the electric current between the output terminal of ignition switch 20 and the input terminal of vehicle body control unit 40
Holding one-way conduction, diode of having connected between the output terminal and the input terminal of vehicle body control unit 40 of ignition switch 20, two
The anode of pole pipe is connected with the output terminal of ignition switch 20, and the cathode of diode is connected with the input terminal of vehicle body control unit 40.
Based on above-mentioned engine start circuit, the utility model embodiment also provides a kind of automobile, including above-mentioned engine
Start-up circuit.
Since other circuits of automotive interior are the prior arts, engine start circuit has carried out in detail in the above-described embodiments
Describe in detail bright, therefore, repeated no more in the present embodiment for specific automobile.
The above, is only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in change in the technical scope that the utility model discloses
Or replace, it should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be wanted with right
Subject to the protection domain asked.
Claims (6)
1. a kind of engine start circuit, it is characterised in that including power supply, ignition switch, protective relay, Body Control list
Member, starting relay and motor circuit, wherein, the input terminal of the ignition switch is electrically connected with the output terminal of the power supply,
The output terminal of the ignition switch is electric with the movable contact of the protective relay and the input terminal of the vehicle body control unit respectively
Connection, the normally-closed contact of the protective relay are electrically connected with a coil terminals of the starting relay, the startup relay
The movable contact of device and the power electric connection, the input terminal electricity of the normally opened contact of the starting relay and the motor circuit
Connection.
2. engine start circuit according to claim 1, it is characterised in that the engine start circuit further includes hair
Motivation control unit, two coil terminals of the protective relay are electrically connected with the control unit of engine.
3. engine start circuit according to claim 1, it is characterised in that the engine start circuit further includes sky
Gear switch, the neutral switch are serially connected with the normally-closed contact of the protective relay and a coil terminals of the starting relay
Between.
4. engine start circuit according to claim 1, it is characterised in that the engine start circuit further includes molten
Disconnected device, the fuse are serially connected between the output terminal of the power supply and the input terminal of the ignition switch.
5. engine start circuit according to claim 1, it is characterised in that the engine start circuit further includes two
Pole pipe, the anode of the diode are electrically connected with the output terminal of the ignition switch, the cathode of the diode and the vehicle body
The input terminal of control unit is electrically connected.
6. a kind of automobile, it is characterised in that including the engine start circuit as any one of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721400006.3U CN207349000U (en) | 2017-10-27 | 2017-10-27 | A kind of engine start circuit and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721400006.3U CN207349000U (en) | 2017-10-27 | 2017-10-27 | A kind of engine start circuit and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207349000U true CN207349000U (en) | 2018-05-11 |
Family
ID=62356599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721400006.3U Active CN207349000U (en) | 2017-10-27 | 2017-10-27 | A kind of engine start circuit and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207349000U (en) |
-
2017
- 2017-10-27 CN CN201721400006.3U patent/CN207349000U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200813 Address after: 100130 Zhaofeng Town, Shunyi District, Beijing Zhaofeng industrial base Tongxin Road No. 1 Patentee after: BAIC GROUP ORV Co.,Ltd. Address before: 101300, 99, Shuanghe Avenue, Renhe Town, Beijing, Shunyi District Patentee before: BEIJING AUTOMOBILE RESEARCH GENERAL INSTITUTE Co.,Ltd. |
|
| TR01 | Transfer of patent right |