Monitoring of the Exhaust System of the Internal Combustion Engine by the Rundown Parameters

Abstract

AbstractAll cars currently manufactured in Russia shall comply with EURO-5 and EURO-6 standards. The toxicity standards of modern cars are continuously tightened and can only be achieved if special systems, components, and mechanisms are used. In particular, these are catalytic converters and oxygen sensors. The loss of their functional properties during operation leads to a steep increase in emission standards by 1.5–15 times and much more in some modes. To reduce significantly the harmful impact of disabled exhaust systems on the operation of the vehicle internal combustion engine (ICE) and the environment, we proposed a new diagnostic method based on monitoring the rundown time in test modes. To implement the proposed diagnostic method, we developed and proposed to use a research motor complex; a device to simulate the resistance in the exhaust system, a DBD-4 gasoline engine loader, and USB Autoscope 4. The rundown time is taken as a sensitive diagnostic parameter. Failures in the exhaust tract were simulated by forming artificial resistance. As a result of the research, we determined the limiting values of the resistance and the rundown time parameters. The new method has proved its effectiveness with a high reliability of assessing the technical status.KeywordsDiagnosticsEcologyToxicityConcentrationSpeedExhaust gases