Diagnostico de sistemas de injeção eletrônica de veículos automotores com uso de osciloscópio digital

Abstract

With the evolution of on-board electronics and its incorporation into the management of automotive systems, new techniques for analyzing and diagnosing faults have emerged and are gradually being incorporated into the domain of performance of vehicle repair professionals. The most recent of these is the application of digital oscilloscopes for reading and interpreting failure modes through the graphic visualization of the signals captured from the electronic devices that make up the various systems. This work discusses the analysis and diagnosis of electronic management systems for Otto cycle internal combustion engines using an automotive oscilloscope. An overview of the evolution of on-board electronic systems for motor vehicles is outlined, highlighting the context in which this work is inserted and its relevance. The digital oscilloscope is briefly described, highlighting its comparative aspects against the application of other tools available on the market. Then, an explanation is given, also briefly, of the devices and their working principles. Finally, the experimental results obtained in the laboratory are presented.