Timing signal fault diagnosis device for electronic control internal combustion engine

Abstract

A timing signal fault diagnosis device for an electronic control internal combustion engine comprises a central processing unit 11, a timing signal processor 10, a database memory 12, a user interface 13, timing signal input interfaces 14 and timing signal output interfaces 15. According to the device, three working modes are provided, and an input timing signal format is analyzed and compared with a pre-stored format in the database memory 12 to realize the timing signal fault diagnosis; a timing signal input into a novel engine is analyzed, and the characteristic parameter of the timing signal is stored in the database memory 12 for diagnosis of the fault of the same model of engine in the future; the timing signal is output, an ECU (electronic control unit) is activated, and accordingly, fault diagnosis for an engine which cannot operate is facilitated.

Description

technical field [0001] The invention relates to a fault diagnosis device for electronically controlling the timing signal of an internal combustion engine. Background technique [0002] Electronic control technology (referred to as electronic control) is widely used in modern internal combustion engines. attached figure 1 Shown is a typical electronically controlled internal combustion engine. figure 1 1 in is the electronically controlled engine. 2 is the control computer ECU. 3 is an electronically controlled actuator, such as an electromagnetic actuator equipped on an electronically controlled fuel injector, an electronically controlled fuel injection pump, and the like. 5 is a sensor for detecting physical quantities such as engine pressure and temperature. 4 is the engine synchronous speed sensor, also known as the timing sensor. The sensor is installed at a very close position on the periphery of the toothed disc that rotates at the rotational speed of the cranks...

AI Technical Summary

Problems solved by technology

Failure of the two timing signals will directly cause the engine to fail to run

For most maintenance practitioners, they do not have the technical skills to use a general-purpose oscilloscope, so they can only disassemble the relevant parts to troubleshoot based on experience

Images