an internal combustion engine which consumes diesel oil and ignites it by compression ignition, an internal combustion engine in which the fuel-air mixture is ignited by the heat of compression of the gas in a cylinder ... Diesel engines, while generally heavier and more expensive than spark ignition engines, have the advantages of better fuel economy, good cold-starting, a longer lifetime and generally less harmful exhaust emissions., raskel mootorikütusel töötav karburaatorita sisepõlemismootor