Porsche V4 engine
Reciprocating internal combustion engine
From Wikipedia, the free encyclopedia
The Porsche 9R9 V4 engine is a two-liter, four-stroke, mono-turbocharged, V-4, racing engine, designed, developed and built by German manufacturer Porsche, for their 919 Hybrid sports car prototype, between 2014 and 2017.[8][9][10][11]
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| Porsche 9R9 V4 engine[1][2][3] | |
|---|---|
The V4 engine visible on the 919 Evo in 2018 | |
| Overview | |
| Manufacturer | Porsche |
| Production | 2014-2017[4][5] |
| Layout | |
| Configuration | 90° V4[6] |
| Displacement | 1,994 cc (122 cu in) |
| Cylinder bore | 92 mm (3.62 in) |
| Piston stroke | 75 mm (2.95 in) |
| Valvetrain | 16-valve, DOHC, four-valves per cylinder |
| Combustion | |
| Fuel system | Direct fuel injection |
| Management | Bosch MS5 |
| Fuel type | 80% Gasoline with E20 Ethanol by Shell V-Power (WEC-mandated) |
| Oil system | Dry sump. Mobil 1 lubrication |
| Cooling system | Water-cooled |
| Output | |
| Power output | 500–720 hp (373–537 kW)[7] |
Background
The compact and lightweight engine was a two-litre (120 cu in) 90-degree V4 cylinder bank mid-mounted mono-turbocharged petrol engine.[12][13] It ran at 9,000 rpm, with performance coming from a direct fuel-injection system and a single Garrett-designed turbocharger with a dual overhead camshaft. It produced approximately 500 hp (370 kW) 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 in its center. Front airflow was enabled by louvers along its flank, and a single curved roll-hoop intake was mounted on its roof to feed the carbon-fiber airbox.