Diesel engine is produced by the American CMS Engine Company. Company, founded in 1919, is the world’s largest manufacturer of specialized diesel engines. Diesel Engine Product Series Up to now, diesel engine has produced 10 series including A, B, C, L10, N, V, K, etc. Among them, A, B, C, L10, N are promising series. CMS Diesel Engine Numbering Rules consists of the following 6 parts.