An Advanced Study on Two Stroke Internal Combustion Engine to Enhance Clean Combustion by the Improved Method of the Airflow

Abstract

This work is aimed to attempt to reduce scavenging problems by developing a new model of two-stroke spark-ignition engine. This model allows fresh air to pass through intake valves at the bottom of the cylinder and burned gases to exit through exhaust ports at the top of the cylinder. The piston closes the exhaust ports as it pushes towards the bottom of the cylinder, and then the fuel is pumped. As a result, the probability of fuel outgoing exhaust gases mixing is minimised. The exhaust ports unravel during piston expansion, and the burnt gases escape to the atmosphere due to pressure differences and high temperatures. The exhaust gases automatically accelerated in the opposite direction of gravity, minimising the chance of mixed incoming fresh air. The engines were designed and developed that used both a relatively simple valve train system and existing ports available in the two stroke engine. This work deals with air flow design of a fuel injected in two stroke engine. This design is to avoid scavenging problems of short circuiting and mixing. Furthermore, a comparison of fuel distribution within the cylinder revealed that when injection occurs against gravity rather than with gravity, the distribution is greater, resulting in cleaner combustion. This study focused on the emission characteristics of enriched fuel in the modified air flow of the engine found that enhanced combustion for reduced the greenhouse gases and less fuel consumption. The characteristics of engine performance and emission of an engine operated under dual fuel mode are compared and analyzed with a 2 stroke and 4 stroke engine. From the experimental analysis , it is confirmed for optimized result is done by using Diesel-RK software and flow analysis is done with ANSYS FLUENT.