The Porsche V4 engine is a two-liter,

four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...

, mono-

turbocharged In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into the ...

, V-4,

racing In sports, racing is a competition of speed, in which competitors try to complete a given task in the shortest amount of time. Typically this involves traversing some distance, but it can be any other task involving speed to reach a specific g ...

engine An engine or motor is a machine designed to convert one or more forms of energy into mechanical energy. Available energy sources include potential energy (e.g. energy of the Earth's gravitational field as exploited in hydroelectric power ge ...

, designed, developed, and built by German manufacturer

Porsche Dr. Ing. h.c. F. Porsche AG, usually shortened to Porsche (; see below), is a German automobile manufacturer specializing in luxury, high-performance sports cars, SUVs and sedans, headquartered in Stuttgart, Baden-Württemberg, Germany. Th ...

, for their 919 Hybrid

sports car A sports car is a type of automobile that is designed with an emphasis on dynamic performance, such as Automobile handling, handling, acceleration, top speed, the thrill of driving, and Auto racing, racing capability. Sports cars originated in ...

prototype A prototype is an early sample, model, or release of a product built to test a concept or process. It is a term used in a variety of contexts, including semantics, design, electronics, and Software prototyping, software programming. A prototype ...

, between 2014 and 2017.

Background

The compact and lightweight engine was a 90-degree V4

cylinder bank The engine configuration describes the fundamental operating principles by which internal combustion engines are categorized. Piston engines are often categorized by their cylinder layout, valves and camshafts. Wankel engines are often categoriz ...

mid-mounted mono-turbocharged petrol engine. It ran at 9,000

rpm Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min, or r⋅min−1) is a unit of rotational speed (or rotational frequency) for rotating machines. One revolution per minute is equivalent to hertz. Standards ISO 80000-3:2019 def ...

, with performance coming from a direct fuel-injection system and a single

Garrett Garrett may refer to: Places in the United States * Garrett, Illinois, a village * Garrett, Indiana, a city * Garrett, Floyd County, Kentucky, an unincorporated community * Garrett, Meade County, Kentucky, an unincorporated community * Garrett, ...

-designed turbocharger with a dual

overhead camshaft An overhead camshaft (OHC) engine is a piston engine in which the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustio ...

. It produced approximately and acted as a chassis load-bearing member. Due to the small size of the engine, the transmission casing was fitted to the rear suspension and was almost a third of the car's length. Engine air ingestion was achieved through a carbon-fiber-and-gold thermal wrapped

airbox An airbox is an empty chamber on the inlet of most combustion engines. It collects air from outside and feeds it to the intake hoses of each cylinder. Older engines drew air directly from the surroundings into each individual carburetor. Modern ...

in its center. Front airflow was enabled by

louver A louver (American English) or louvre (Commonwealth English; American and British English spelling differences#-re, -er, see spelling differences) is a window blind or window shutter, shutter with horizontal wikt:slat, slats that are angle ...

s along its flank, and a single curved roll-hoop

intake An intake (also inlet) is an opening, structure or system through which a fluid is admitted to a space or machine as a consequence of a pressure differential between the outside and the inside. The pressure difference may be generated on the ins ...

was mounted on its roof to feed the carbon-fiber airbox.

Applications

Porsche 919 Hybrid The Porsche 919 Hybrid is a Le Mans Prototype 1 (LMP1) dual hybrid racing car built and used by Porsche in the 2014 FIA World Endurance Championship, 2014, 2015 FIA World Endurance Championship, 2015, 2016 FIA World Endurance Championship, 2016 ...

References

{{Porsche Porsche Engines by model Gasoline engines by model Porsche in motorsport V4 engines