Basically it makes the saw more fuel efficient (30-40%) with less emissions. Here is a little more specific info: The CWI system described utilizes a compression wave derived from the combustion process of a two-stroke engine to inject a rich mixture into the cylinder of the engine. The hot gases fr

Basically it makes the saw more fuel efficient (30-40%) with less emissions. Here is a little more specific info: The CWI system described utilizes a compression wave derived from the combustion process of a two-stroke engine to inject a rich mixture into the cylinder of the engine. The hot gases from the combustion process are used to partially vaporize the fuel charge prior to entry into the cylinder. Reflected compression wave behavior is utilized to aid in the preparation of the fuel charge and deliver the charge to the cylinder after the initiation of the scavenging behavior. By utilizing the Compression Wave Injection method; low-cost, carbureted engines can be produced that operate with well-vaporized delayed fuel entry into the cylinder in a similar fashion to direct-injected engines. Such engines display 30 percent improvement in brake specific fuel consumption and 70-85 percent reduction in emission of unburned hydrocarbon.
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