An engine preheating and rearview mirror heating circuit

Abstract

The invention discloses an engine preheating and rearview mirror heating circuit which comprises a power source, a master relay switch, a processor unit, a rearview mirror heating module and an engine preheating module. One end of the master relay switch is connected with one end of the power source while the other end of the master relay switch is connected with a first switch and then connected to one end of the rearview mirror heating module, the other end of the rearview mirror heating module is connected to the other end of the power source, the other end of the master relay switch is connected with a second switch and then connected to one end of the engine preheating module, the other end of the engine preheating module is connected to the other end of the power source, one end of a third switch is connected with the other end of the master relay switch while the other end of the same is connected with one end of the rearview mirror heating module and one end of the engine preheating module, and an output end of the processor unit is connected with a control end of the master relay switch. Parts in the engine preheating and rearview mirror heating circuit are reduced, utilization rate of the parts is increased, and the circuit is designed to be more compact.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an engine preheating and rearview mirror heating circuit. Background technique [0002] At present, the vehicle has added functions such as engine electric preheating and rearview mirror heating that require delayed action to meet the continuous improvement of performance requirements for motor vehicles. [0003] In the engine electric preheating and rearview mirror heating circuit, it is usually realized by a relay, and the input terminal of the relay is connected to a control unit such as an ECU (Electronic Control Unit, electronic control unit) or a BCM (body control module, body control module) The control unit delays the pull-in of the relay coil to make the engine preheating circuit or rearview mirror heating circuit work. After the preheating or heating is completed, the control unit controls the relay coil to disconnect. [0004] At present, for the engine electric preheating ...

AI Technical Summary

Problems solved by technology

[0004] At present, for the engine electric preheating circuit and the rearview mirror heating circuit, different relays are used for control, and the control unit controls the pull-in of the respective relays to realize the operation of the engine preheating circuit or the rearview mirror heating circuit. However, with With the continuous improvement of vehicle performance requirements, the circuit control system is becoming more and more complicated. It is necessary to reduce the components in the circuit, improve the utilization rate of components, and propose a more compact circuit design.

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