General dynamics usually refers to non-road gasoline engines and diesel engines with a power of less than 20KW except for vehicles and aviation. It is a thermodynamic machine with a wide range of applicability. Due to its small size, light weight, and convenient movement, it can be used as power engines are used in general power machinery terminal products such as generator sets, agricultural machinery, garden machinery, small construction machinery, etc., so they are also called general small gasoline engines or diesel engines.