An engine abnormal noise fault simulation device and method

Abstract

The invention provides an engine abnormal sound fault simulation device and method. The engine abnormal sound fault simulation device comprises an engine; a first gap is reserved between a crankshaft connecting rod shaft and a connecting rod bearing bush, a second gap is reserved between a crankshaft main shaft and a crankshaft main shaft neck bearing bush, and a third gap is reserved between a piston and a cylinder, wherein the first gap is larger than 0.12mm and ranges between 0.16mm and 0.21mm, the second gap is larger than 0.17mm and ranges between 0.23mm and 0.28mm, and the third gap is larger than 0.12mm and ranges between 0.145mm and 0.165mm; the first gap and the second gap are produced by scraping antifriction alloy portions on the connecting rod bearing bush and the crankshaft main shaft neck bearing bush through a scraper, and the third gap is produced by scraping a skirt portion of the piston through the scraper. According to the engine abnormal sound fault simulation device and method, fault points are purposefully treated, and a learning platform is provided for students and enterprise maintenance staff.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to abnormal noise faults caused by abnormal wear of mechanical parts of the engine and fault diagnosis, analysis and elimination. Background technique [0002] The engine is the heart of the car, and its working performance directly affects the normal work of the car. Due to the complex structure of the engine and the work in the harsh environment of high temperature, high pressure, high speed, high load and high vibration, the failure rate is the highest. The abnormal sound produced by the engine during operation that exceeds the technical documents is called engine abnormal sound, which is a kind of mechanical failure. The longer the service life of the engine, the higher the frequency of abnormal sound failure. [0003] The abnormal sound of the engine indicates that the working state of a certain mechanism of the engine has changed, and it often reflects failures of ...

AI Technical Summary

Problems solved by technology

When encountering an engine abnormal sound failure, it is often impossible to directly judge that a certain mechanism or a certain part has a problem. The solution is to directly overhaul the engine, disassemble all the engine, and check each component one by one, wasting a lot of time and energy, the last fault may not have been resolved

At present, the engine abnormal sound simulation devices used are basically operated by scrapped engines, the fault points are scattered and untargeted, and the manufacturers of automobile training equipment currently do not have related products

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