Study on the Oxidation Process of Unburnt Hydrocarbons in the Exhaust System of a Spark Ignition Engine. 1st Report. Characteristic of Time-Resolved Measurement System of Hydrocarbon Species.

Abstract

Oxidation in the exhaust systems of spark ignition engines is one of the important properties characterizing the behavior of unburnt hydrocarbons. A time-resolved measurement system of hydrocarbon species which consists of a high speed solenoid valve and a gas chromatograph is developed. It is confirmed experimentally that this system can be used to measure hydrocarbon species when the engine is rotating in both the cold starting and warmed-up periods. The difference in the oxidation processes in the exhaust system in methane-fueled and propylene-fueled engines is discussed in relation to the data measured using this system.