A new member of the family of KHD's (Kloeckner-Humboldt-Deutz AG., West Germany) air cooled engines has been developed in its Montreal-based Research & Development Centre. This paper presents a description of KHD's proven philosophy in the design and development of high quality air cooled engines, synthetized with North American market requirements for a diesel engine as a direct replacement of gasoline engines, especially in the market segment of vehicles from Class 2 up to Class 7. It focuses in detail on conceptual philosophies applied to determine layouts and major features of basic components. Crankshaft, crankcase, engine cooling and lubrication system, noise and exhaust emission considerations are presented in the form of detailed discussions.
