Search Results

This paper deals mainly with the computer simulation and experimental investigations on a single cylinder, four-stroke, spark ignited, extended expansion engine. The simulation procedure involves thermodynamic and global modeling techniques. Sub-models have been used for predicting heat transfer, friction and gas exchange processes. A two-zone model is adopted for combustion process. Combustion model predicts mass burning rate, ignition delay and combustion duration. It uses sub-models for calculating flame-front area, flamespeed and chemical equilibrium composition of ten product species. Experimentally measured valve-lift data along with suitable coefficient of discharge is used in the analysis of gas exchange process. Unburned hydrocarbons, carbon monoxide and nitric oxide emissions have also been predicted. Experiments have been conducted on a single cylinder, air-cooled, four-stroke, spark-ignition engine.