SAMPLING OF UNREGULATED COMPONENTS OF A TWO-STROKE. STEPPED·PISTON ENGINE EMISSION

Abstract

High unburnt hydrocarbons (HC) emissions results in the case of carbureted two-stroke
engine because of the scavenging process carried out by fresh mixture of air and fuel.
Some of this air-mixture combines with the residual exhaust gas as it scavenges the
cylinder The use of lubrication oil present in the combustion process, inhibits the
two-stroke engine as a mean engine to the environment. A two-stroke step-piston engine
was developed to minimize these problems The step-piston engine configurations
incorporate a compression chamber which eliminates the use of crankcase compression
Therefore the usage of lubrication oil to lubricate the crankcase components could be
stop. In this paper the unregulated gases namely benzene, 1,3-butadine, toluene and
methyl tertiary butyl ether (MTBE) were considered Gas chromatography (GC) machine equipped with flame ionization detector (FlD) was employed to detect the gases. A method was developed f or analyzing hydrocarbon based gases. The lest was fully computer guided using TotalChrom software where the results were displayed and logged automatically Detected gas components arise from the GC were displayed qualitatively. Later the results were analyzed using Total Hydrocarbons Analysts (DHAj software [or quantitative analysis. A conventional two-stroke engine was later chosen for comparative study.