Control change cause analysis for engine fault diagnosis

Abstract

Engine is the power source and the heart of the vehicle and it can ensure the safety and reliability of the whole vehicle dynamic system. Engine structure is becoming more and more complex, and it is difficult to make fault diagnosis after fault happened. In order to complete engine fault diagnosis quickly and accurately, in this paper, a new method of cause analysis has been proposed to make fault diagnosis, and this method is control change cause analysis (3CA). 3CA is a method which can be used to the cause analysis of different types of accidents and faults. 3CA is based on the process of control analysis and change analysis. Applying control change analysis to analyze engine fault can get the barrier and control which can prevent the fault happening again, the change of the engine performance and the importance ranking of the fault phenomenon, which provides a basis for the cause analysis of the fault.