The National Transport University Bulletin

Abstract

The article deals with the method of modern engines fuel systems diagnosing using a digital oscilloscope. The object of the study – the fuel supply system of internal combustion engines. The purpose of the study – analysis of the main operating parameters of modern automotive engines electronic fuel management systems and determination of the methods of it diagnostic using a digital oscilloscope. And to describe typical defects in the engine fuel system that can be detected using a digital oscilloscope. Research method – practical and analytical. The article considers the structure and operation of modern automobile engines fuel systems. It is established that the most widespread fuel systems today are the Common Rail diesel fuel system and the Gasoline Direct Injection fuel system for petrol engines. The key elements of both fuel systems, which ensure fuel supply and dosing into the engine cylinders, are identified. The methodology for testing sensors and actuators of fuel systems using a digital oscilloscope is considered. The recommended equipment and connection points for measuring equipment are described. The methodology and results of testing the Common Rail and Gasoline Direct Injection fuel systems are presented. Typical defects of engines fuel system that can be determined using a digital oscilloscope are considered. It has been established that a digital oscilloscope allows for a quick and efficient check of the fuel equipment of engines with direct injection of petrol and diesel fuel. Based on the diagnostic results, it is possible to determine the performance of the fuel injection system, check the operating cycles of valves and fuel injectors, determine the presence of defects, and also check the tightness of the high-pressure fuel system as a whole. The results presented in the article can be used to further develop methods for diagnosing electronic engine control systems using a digital oscilloscope.

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