Abstract
A test diagnostic method is proposed, based on monitoring the toxicity parameters of exhaust gases in the exhaust manifolds of individual cylinders up to the catalytic converter with a multi-component gas analyzer. The relationships between the parameters CO2 and CH are analysed both individually and jointly when simulating changes in the technical condition of the spark plugs of the ignition system and the resistance of the catalytic converter in the exhaust system. Experiments are carried out at two throttle opening positions: 20 and 40 %. A joint analysis of the dependences of CO2 and CH shows a shift of the point of their intersection to the zone of longer or shorter injection duration, depending on the malfunction. As the exhaust resistance increases, the range of changes in CO2 and CH decreases significantly; the same is observed when the spark plug gap decreases. The presented method is recommended for use by auto service and machine-building enterprises, which will allow them to carry out highly effective monitoring of the technical condition of engine systems.
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