Based On Fuzzy Diagnosis Engine Fault Diagnosis Research

With the strong development of the modern automobile industry, vehicle engine production and research advances. Vehicle engine is a core component of the car, but also accounted for major share of the cost of car. To research a vehicle engine fault detection and fault diagnosis, has engineering significance. This paper studies the phenomenon and causes of engine failure,it has a reference value of the engine's reliability and maintenance.This article discusses the diagnosis of automotive engine faults and methods, combined with the construction and automobile engine works, gives the car engine fault tree, respectively, connecting rod, gas distribution systems, fuel supply system, cylinder block and crankcase group fault tree, fault tree cooling system, lubrication system is analyzed.This article analyzes the automotive engine test, makes the fault tree and failure vector, and in which application of the bench Ferrography in the oil samples to compare the grain of the automobile engine and the evaluation index weights, which introduced mechanicalsystem, the potential failure of each part of the institutional situation and the probability of system failure. According to the load characteristic on the engine bench features to infer a fault in the form of charts under the characteristic curve of the engine,figure out the relationship between the car engine fault and the fuel consumption.