Design Of An Expansion Chamber For Power Tuning Of A Two Stroke Engine

Renggie, Rudelle Roland (2008) Design Of An Expansion Chamber For Power Tuning Of A Two Stroke Engine. Project Report. UTeM, Melaka,Malaysia. (Submitted)

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Abstract

Expansion chamber is an exhaust system used for power tuning in two stroke engines. The importance of designing appropriate expansion chamber is for power - tuning in two - stroke engine to ensure the engine to produce more power output with a reduction of polluted emissions as well. The two stroke engine doesn't utilize an exhaust stroke or complicated valve to emit the burnt gases fiom cylinder like four stroke engine. The incoming mixture charge is used to help push the burnt gases out of the exhaust port. This is not an efficient process since some of the burnt gases remained in the cylinder and may be some of the new mixture charge escaped through the open exhaust port. Thus, expansion chamber enhances and controls the flow through the engine by using pressure pulses. The design of expansion chamber will have an effect on the pressure movement. The design was based on different cross section and length, depending on the requirement of the type of engines. Expansion chamber will be designed using empirical design process. By simulation, results obtained will be used to verify which expansion chamber gives out the best power performance of two - stroke engine. Thus, to ensure better engine performance, the design of expansion chamber must match with the engine specifications.

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