Engine design refers to the process of creating and optimizing engines, which are machines that convert fuel into mechanical energy. This involves selecting materials, determining the engine's size and shape, and ensuring it operates efficiently. Engineers consider factors like power output, fuel efficiency, and emissions to meet performance standards. Key components of engine design include the cylinder, piston, and crankshaft. Each part plays a crucial role in the engine's function. For example, the cylinder houses the piston, which moves up and down to create power. Effective engine design balances performance with environmental considerations, making it essential for modern vehicles.