Current Trends for Vehicle System Monitoring – Development of Second Generation On-Board Diagnostics.

Abstract

The objective of the article is to show the development of the second generation vehicle on-board diagnostics and its application for monitoring harmful emissions mainly emitted by the internal combustion engines. Since the end of the last century, car manufacturers have begun to integrate a range of electronic control units into vehicles. This integration is aimed at increasing fuel economy and reducing vehicle emissions. Monitoring is primarily achieved through signals sent by internal combustion engine-mounted sensors that record and send electronic signals to electronic control units about the processes occurring inside and outside the engines' cylinders. Electronic signals are collected and processed in these electronic control units via a CAN controller, where they can be read in real time by diagnostic tools using communication protocols. In order to achieve the monitoring of mass vehicle systems, it is necessary to use common standards for data exchange and their reading by universal diagnostic tools. The International Organization for Standardization (ISO) and the Society of Automotive Engineers (SAE) have issued CAN standards for data exchange in vehicle systems.