Improvements of the Rotary Engine with a Charge Cooled Rotor

This paper covers the features of rotary engines with charge-cooled rotors developed by Yanmar Diesel Engine Co., Ltd. It includes test results obtained with charge-cooled rotors during the course of development of the engine with this feature. With continuing new applications of the NSU/Wankel rotary engine, charge-cooling appears to be a promising feature, especially in small-sized engines, from the point of view of simple structure and improved economy.