This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Fundamental Configuration and Characteristics of Novel Special-Surface Non-Eccentric Rotor Engine "Ishino Engine"
Published October 03, 2012 by Society of Automotive Engineers of Japan in Japan
A novel rotational internal combustion engine dubbed "Ishino engine" is invented and investigated. No eccentric rotational component is used in this engine, resulting in vibration-free operation. The engine consists of rotor casing and two types of rotors; cycloid rotor and trochoid rotor. The shape of the cycloid rotor is characterized by epicycloid surface, and the trochoid rotor also superior-epitrochoid surface. In this paper, first, the typical configuration is shown, next two procedures for designing the rotors are described in detail. Furthermore the design drawing of the prototype engine is given and its cyclic behavior is explained. Finally the time variations of chamber volume and pressure are estimated. The result shows that high efficiency is obtained by achieving the high expansion ratio cycle in the prototype engine.