The following picture labels the various elements of a two-stroke engine which are referred to in this Wikibook page.įurthermore abbreviations will help as well:įor introductory material on 2 Stroke Engines please see the following links: This is beneficial for two stroke engines because unlike four stroke engines, they do not have dedicated intake and exhaust strokes and valves. This is achieved by designing the pipe in such a way that positive and negative reflected waves arrive back at the exhaust port at an instant when a low or high pressure is desired. The purpose of straight and tuned pipes is to utilize the pressure waves originating from the exhaust port to assist the breathing of the engine.

The figure below depicts cross sections for 3 typical configurations of tuned pipes as well as a straight pipe: A tuned pipe is made of between 3 and 4 characteristic sections depending on the desired effect. HowStuffWorks 2 Stroke Engines Introduction įor a 2 stroke engine the tuned pipe is the section of the exhaust system that begins at the exhaust port and ends at the end of the converging section. For introductory material on 2 Stroke Engines please see the following links:

This page of the Engineering Acoustics Wikibook discusses the merits and design of Tuned Pipes for 2 Stroke Engines.