When the car stopped, the engine gave a loud roar.

After the car stops, the engine makes a loud roar. You should clean the throttle and check whether the throttle line is stuck.

An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (gasoline engines, etc. ), external combustion engine (Stirling engine, steam engine, etc. ), motor, etc. For example, internal combustion engines usually convert chemical energy into mechanical energy. The engine is suitable for both power generation devices and complete machines (such as gasoline engines and aero-engines) including power devices. The engine was first born in Britain, so the concept of engine also originated in English. Its original meaning refers to "a mechanical device that generates power".