Non-road engine

Non-road engine (which may include non-road equipment and non-road vehicle) is an internal combustion engine or a gas turbine engine used for other purposes than being an engine of a vehicle operated on public roadways. The term is commonly used by regulators to classify the engines in order to control their emission. Non-road engines are used in an extremely wide range of applications which may include machinery and engines of vehicles in other modes of transportation with different fuel types such as gasoline and diesel fuel. In many jurisdictions, the term non-road engine is assumed to refer to the engines that have mobility or portability which is separated from the term stationary engine. The definition of non-road engine may explicitly exclude certain non-road vehicles such as aircraft, locomotives, and ocean-going marine vessels. In Europe, the regulations are specifically clarified on the mobility by using the term non-road mobile machinery. In Australia, the definition includes some stationary engines such as electric generators and pumps.