How does a diesel injector work? A fuel injector in a diesel engine consists of a solenoid (a type of electromagnet), a nozzle, and a needle within the injector body. Modern diesel engines are direct injection, meaning fuel is delivered directly into the combustion chamber. In the cylinder, air is compressed by the upward movement of the piston. Really though, there's not much to know. Basically, each piston in a boxer engine gets its own crank pin, so the pistons opposite each other move together. The fact that these pistons move 2. Compression Step. The second step is the compression stroke. As the name implies there is a compression process in a diesel engine due to the process of compressing air by the piston. In this stroke, the piston moves from BDC to TDC. The inlet valve and exhaust valve are both closed as well. In an internal combustion engine (ICE), the ignition and combustion of the fuel occurs within the engine itself. The engine then partially converts the energy from the combustion to work. The engine consists of a fixed cylinder and a moving piston. The expanding combustion gases push the piston, which in turn rotates the crankshaft. Most automobile engines arrange their cylinders in a straight line, such as an inline-four, or combine two banks of inline cylinders in a vee, as in a V-6 or a V-8. gray structure – engine block. An internal combustion engine ( ICE or IC engine) is a heat engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber that is an integral part of the working fluid flow circuit. In an internal combustion engine, the expansion of the high- temperature and high What Is a Diesel Engine? A diesel engine is an internal combustion engine that operates on the principle of compression ignition. Unlike gasoline engines, which use spark plugs to ignite a mixture of fuel and air, diesel engines rely on the heat generated by compressing air within the engine cylinder to ignite the diesel fuel. Definition & Classification. Heat engines are energy conversion machines—they convert chemical energy in a fuel into work by combusting the fuel in air to produce heat. This heat is used to raise the temperature and pressure of a working fluid that is then used to perform useful work. Heat engines can be classified as: Hrid.