Power delay system for automobile electric control unit

Abstract

The invention provides a power delay system for an automobile electric control unit, which is flexible and reliable to control, and low in cost and power consumption and meets the requirements of the conventional automobiles. The power delay system for the automobile electric control unit particularly comprises an electronic switch unit, an electric control unit, an automobile key ignition switch, a delay circuit and a signal verification unit, wherein the electronic switch unit comprises a power input end, a power output end, a first control end and a second control end; the power input end is connected with a low-voltage power supply of the automobile; the power output end is connected with the power input end of the electric control unit; the first control end is connected with the ON-gear power signal end of the automobile key ignition switch; the input end of the delay circuit is connected with the key on-off state signal end of the automobile key ignition switch; the output end of the delay circuit is connected with the first input end of the signal verification unit; the electric control unit receives a key on-off state signal of the automobile key ignition switch and outputs a control signal to the second input end of the signal verification unit; and the output end of the signal verification unit is connected with the second control end of the electronic switch unit.

Description

technical field [0001] The invention belongs to the technical field of automobile electronics, and in particular relates to a power supply delay system of an automobile electronic control unit. Background technique [0002] With the development of automobile technology, more and more electronic control unit components are used in automobiles, such as engine electronic control unit, vehicle electronic control unit, automatic transmission electronic control unit, motor control unit and battery management electronic control unit, etc. . These electronic control units still need to work for a period of time for data storage, automatic window closing, or cooling system work after the driver stops and pulls out the car key, or when the car encounters a fault and the 12V battery is powered off. Therefore, it is necessary to design a delay system for the power supply of these electronic control units. [0003] At present, this power delay method generally adopts the cooperation co...

AI Technical Summary

Problems solved by technology

However, this solution is not flexible enough due to the fixed time of the delay relay. It is not suitable for occasions where the delay working time of the electronic control unit is uncertain after the power is cut off on the car. Moreover, the use of the delay relay consumes a lot of power, and the cost is high. The service life of the device low, poor reliability

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