Engine control module power supply control circuit

Abstract

The invention relates to a power supply control circuit, in order to solve the problem that the existing power supply control circuit of the engine control module cannot be controlled according to its own working condition after the electric lock is disconnected; it provides a power supply control circuit of the engine control module, including a storage battery and an engine control module , electric lock, main power switch, delayed power-off control circuit, the delayed power-off control circuit includes a first relay and a second relay, the electromagnetic coil of the first relay is connected between the signal input end of the ECM electric lock and the circuit ground wire The contact of the first relay and the electromagnetic coil of the second relay are connected in series between the positive pole of the battery and the output terminal of the ECM status signal, and the contact of the second relay is connected between the negative pole of the battery and the grounding terminal of the ECM. In the present invention, after the electric lock and the main power switch are disconnected successively, the storage battery still supplies power to the engine control module until the data storage of the engine control module and the cleaning of the DEF pipeline are completed, and the battery is automatically disconnected from the power supply.

Description

technical field [0001] The present invention relates to a control circuit, more specifically, to a power supply control circuit of an engine control module. Background technique [0002] At present, construction machinery has higher and higher requirements for diesel engine exhaust emissions, especially in the European and American markets, requiring construction machinery entering this market to meet 4F emission standards. At present, most of the mainstream diesel engines meeting the 4F emission standard on the market use an after-treatment system to treat the exhaust gas. For engines with post-processing systems, after the ignition switch 5 (electric lock) is turned off, the whole machine still needs to continue to supply power to the engine control module 3 (ECM) and the post-processing system for a period of time, so that the ECM can store data and the post-processing system 4 Clean the DEF pipeline. [0003] In order to ensure the stability of the voltage and avoid in...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a power supply control circuit of the engine control module, so that when the electric lock is disconnected, the power supply control circuit of the existing engine control After opening, the power supply to the engine control module is automatically controlled by the working status of the engine control module

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