CN202578882U

CN202578882U - Electronic thermostat control circuit

Info

Publication number: CN202578882U
Application number: CN 201220116136
Authority: CN
Inventors: 潘家春
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2012-03-26
Filing date: 2012-03-26
Publication date: 2012-12-05
Anticipated expiration: 2022-03-26

Abstract

The utility model discloses an electronic thermostat control circuit, which comprises an electronic control unit (ECU), an electronic thermostat and a relay, wherein a signal output end of the ECU is connected to an output loop of the relay; and the electronic thermostat is connected to an input loop of the relay. By the circuit, the heat dissipating capacity of the ECU during operation is reduced, an ECU interface circuit is effectively simplified, and the cost of the ECU is reduced.

Description

A kind of electronic thermostat control circuit

Technical field

The utility model relates to a kind of engine control system, relates to the control circuit of petrol engine electronic thermostat in particular.

Background technique

Existing electronic thermostat is directly controlled electronic thermostat by control unit of engine, and as following: the patent No. is CN201010614849.X, and patent name is " a kind of engine-cooling system "; The patent No. is " a kind of valve-plate electronic thermostat " for the CN200910142751.6 patent name; The patent No. is " a kind of Busing type electronic thermostat " for the CN200910142752.0 patent name; The patent No. is " a kind of electronic thermostat " for the CN200810139036.2 patent name; The patent No. is " a kind of electronic thermostat " for the CN200820040539.X patent name; The patent No. is a disclosed electronic thermostat electrical control circuit in the patents such as " a kind of electronic thermostats " for the CN200820187254.9 patent name; Directly control electronic thermostat by control unit of engine; Such electrical control circuit is when electronic thermostat is worked, and operating current is bigger, causes the ECU heating value big; And the variation meeting of external voltage produces rush of current to the ECU interface circuit; Make to the hardware designs requirement complicacy of ECU, cause the rising of ECU cost, cause the electronic thermostat reliability to reduce.

The model utility content

The utility model technical problem to be solved is to realize the little electronic thermostat control circuit of a kind of heating value.

To achieve these goals; The technological scheme that the utility model adopts is: a kind of electronic thermostat control circuit; Comprise ECU and electronic thermostat; Control circuit also comprises relay, described ECU signal output part cut-in relay output loop, described electronic thermostat cut-in relay input circuit.

Described ECU and electronic thermostat are all connected the 12V power supply through relay.

The advantage of the utility model is that this circuit has reduced ECU when work heat dissipating capacity, has effectively simplified the ECU interface circuit, has reduced the ECU cost.

Description of drawings

Face the content of every width of cloth accompanying drawing expression in the utility model specification and the mark among the figure down and make brief description:

Fig. 1 electronic thermostat control circuit schematic representation;

Mark among the above-mentioned figure is: 1, ECU; 2, electronic thermostat; 3, relay.

Embodiment

Can know the electronic thermostat control circuit referring to Fig. 1; Comprise ECU1, electronic thermostat 2 and relay 3; The output loop one termination ECU1 signal output part of its repeat circuit 3, another termination 12V power supply, the input circuit one termination electronic thermostat 2 of relay 3; Another termination 12V power supply makes electronic thermostat 2 energising work, thereby controls electronic thermostat 2 work through relay 3.Because ECU1 is very little through the electric current that control relay 3 is produced, the heat that then produces also can correspondingly reduce, and simultaneously owing to different with traditional control method, makes the ECU1 interface circuit design simplify, and has reduced the ECU1 cost.

Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the utility model does not receive the restriction of aforesaid way; As long as adopted the improvement of the various unsubstantialities that method of the present invention design and technological scheme carry out; Or design of the present invention and technological scheme are directly applied to other occasion without improving, all within the protection domain of the utility model.

Claims

1. electronic thermostat control circuit; Comprise ECU (1) and electronic thermostat (2); It is characterized in that: control circuit also comprises relay (3), described ECU (1) signal output part cut-in relay (3) output loop, described electronic thermostat (2) cut-in relay (3) input circuit.

2. electronic thermostat control circuit according to claim 1 is characterized in that: described ECU (1) and electronic thermostat (2) are all connected the 12V power supply through relay (3).