Internal combustion engine

Volkswagen's VR6 engines, and the later VR5 variants, are a family of internal combustion engines, characterised by a narrow-angle (10.5° or 15°) V engine configuration.

A U engine is a piston engine made up of two separate straight engines (complete with separate crankshafts) joined by gears or chains.

Engine configuration is an engineering term for the layout of the major components of a reciprocating piston internal combustion engine.

The Mercedes-Benz M276 engine is a direct injected, V6 gasoline automotive piston engine.

The Mercedes-Benz OM611 engine is a straight-4 diesel engine that is produced by Mercedes-Benz.

The OM651 is a family of inline-four cylinder Diesel automobile engines introduced by Mercedes-Benz in 2008.

The RB engine is a 2.

A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.

A crankshaft—related to crank—is a mechanical part able to perform a conversion between reciprocating motion and rotational motion.

A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels.

A four-stroke engine (also known as four cycle) is an internal combustion (IC) engine in which the piston completes four separate strokes while turning a crankshaft.

Horsepower (hp) is a unit of measurement of power (the rate at which work is done).

A reciprocating engine, also often known as a piston engine, is a heat engine (usually, although there are also pneumatic and hydraulic reciprocating engines) that uses one or more reciprocating pistons to convert pressure into a rotating motion.

A catalytic converter is an emissions control device that converts toxic gases and pollutants in exhaust gas to less toxic pollutants by catalyzing a redox reaction (an oxidation and a reduction reaction).

Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector.

An ignition system generates a spark or heats an electrode to a high temperature to ignite a fuel-air mixture in spark ignition internal combustion engines oil-fired and gas-fired boilers, rocket engines, etc.

On-board diagnostics (OBD) is an automotive term referring to a vehicle's self-diagnostic and reporting capability.

A starter (also self starter, self, or starter motor) is an electric motor, pneumatic motor, hydraulic motor, an internal-combustion engine in case of very large engines or other device used for rotating an internal-combustion engine so as to initiate the engine's operation under its own power.

A piston ring is a split ring that fits into a groove on the outer diameter of a piston in a reciprocating engine such as an internal combustion engine or steam engine.

An antifreeze is an additive which lowers the freezing point of a water-based liquid.

A muffler (silencer in many non-US English speaking countries) is a device for decreasing the amount of noise emitted by the exhaust of an internal combustion engine.

A petrol engine (known as a gasoline engine in American English) is an internal combustion engine with spark-ignition, designed to run on petrol (gasoline) and similar volatile fuels.

Spark plugs may also be used for other purposes; in Saab Direct Ignition when they are not firing, spark plugs are used to measure ionization in the cylinders – this ionic current measurement is used to replace the ordinary cam phase sensor, knock sensor and misfire measurement function.

Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline, petrol, biodiesel blends, diesel fuel, fuel oil, or coal.

(This article is about existing engine designs. For the quite different concept proposed by Frank Stelzer, see Stelzer engine.)(Not to be confused with the boxer, or flat engine.) An opposed-piston engine is a reciprocating internal combustion engine in which each cylinder has a piston at both ends, and no cylinder head.

VANOS (abbr. from German variable Nockenwellensteuerung) is an automotive variable valve timing system produced by BMW.

The straight or inline engine is an internal-combustion engine with all cylinders aligned in one row and having no offset.

Rocker covers are covers that are bolted on over rocker arms in an internal combustion engine.

The Mercedes-Benz OM629 engine is a 4.

The Mercedes-Benz OM642 engine is a 3.

Manifold vacuum, or engine vacuum in an internal combustion engine is the difference in air pressure between the engine's intake manifold and Earth's atmosphere.