Abstract
The effectiveness of scavenging process in two stroke engine is a prime factor to be considered in the design and operation phases. The scavenging process is greatly influenced by the length and shape of the exhaust pipe which is best at its design point only. At conditions other than the design point, the length and shape of the exhaust pipe is no more effective. This is because the refracted wave directed back to the exhaust port does not match with the exhaust stroke process of the engine. A controlled exhaust gas wave reflector installed in a certain distance from the exhaust port can overcome these inconveniences. This paper discusses the experimental study carried out in the Laboratory of Combustion Engine and Propulsion System, Mechanical Engineering Department, Institute Technology Bandung, on the influence of a controlled exhaust gas wave reflector in a two stroke single cylinder engine to the engine performance. At a certain angular position of the reflector the engine performance has increase considerably in almost of the combination of engine rpm and loads.