Unit construction

With engine block is called in motorcycle a motor, in which the transmission and engine are in a housing. In the early days of the engine (from the 1910s ), the transmission has been widely used by a supplier, so this was screwed in the assembly with the engine block and connected by a primary chain. First block engines in motorcycles existed before the First World War, after which the block engine became the standard.

In the automotive industry is meant by block engine, an engine type in which two or three cylinders were cast in one block. Then, four -cylinder or six-cylinder engines are composed of two or three of these blocks. From about the first World War, knew how to pour all required cylinders in one block, which then created the series motor.