BMW P48 Turbo engine
The BMW P48 Turbo is a prototype four-stroke 2.0-litre single-turbocharged inline-4 racing engine, developed and produced by BMW Motorsport for Deutsche Tourenwagen Masters. The P48 Turbo engine is full custom-built but partially borrows the cylinder blocks from BMW B48 road car engine which had a same displacement. BMW P48 Turbo is the first-ever turbocharged DTM engine to date, replacing the aging BMW P66 Series (P66/1) V8 engine after seven-years of service and conform the "Class 1" regulations that shared with Japanese Super GT under Nippon Race Engine (NRE) formula. BMW P48 Turbo engine currently competes with engine competitors Audi RC8 2.0 TFSI and HWA AFR Turbo 2.0.
| BMW P48 Turbo | |
|---|---|
| Overview | |
| Manufacturer | BMW Motorsport |
| Production | 2019-2020 |
| Layout | |
| Configuration | Inline-4 cylinder |
| Displacement | 2.0 litres (122 cubic inches) |
| Cylinder bore | 86–90 mm (3.39–3.54 in) |
| Piston stroke | Free but typically approximately between 86–90 mm (3.39–3.54 in) |
| Cylinder block material | Die cast steel or aluminium alloy. Machining process from a solid is not permitted |
| Cylinder head material | Die cast steel or aluminium alloy |
| Valvetrain | DOHC 16-valve (four-valves per cylinder) |
| Compression ratio | 15:1 |
| Combustion | |
| Turbocharger | Single-turbocharged by Garrett Advancing Motion with 3.5 bar (51 psi) of turbo boost pressure |
| Fuel system | Bosch HDEV6 350 bar (5,076 psi) central high-pressure gasoline direct fuel injection. One direct injector per cylinder fed by an engine-driven high-pressure fuel pump |
| Management | Bosch Motronic MS 7.4 |
| Fuel type | Aral Ultimate 102 RON unleaded racing gasoline |
| Oil system | Dry sump. Shell Helix Ultra |
| Cooling system | Single mechanical water pump feeding a single-sided cooling system |
| Output | |
| Power output | 610 + 30 hp (455 + 22 kW) (2019) later 580 + 60 hp (433 + 45 kW) (2020-present)[1] including push-to-pass |
| Torque output | Approx. 650 N⋅m (479 lb⋅ft) @ 9,000 rpm |
| Dimensions | |
| Length | 600 mm (23.62 in) |
| Width | 697 mm (27.44 in) |
| Height | 693 mm (27.28 in) |
| Dry weight | 187 lb (85 kg) including turbocharger |
| Chronology | |
| Predecessor | BMW P66 Series (V8) |
Début and public unveil
The BMW P48 Turbo engine was made a first shakedown début fitted with BMW M4 Turbo DTM car on 27 October 2018 at near BMW headquarters in Munich, Germany in the hands of Bruno Spengler.[2] The BMW P48 Turbo engine was publicly unveiled on 25 April 2019 including comparison with first BMW 2002 Turbo engine[3] and made an official race début on 3 May 2019 at Hockenheimring.
Construction
The P48 Turbo engine consists of approximately 2,000 individual parts. The engine's valve acceleration is 2,000 times faster than gravitational acceleration, or 400 times faster than the acceleration of a lunar rocket. The pistons in the BMW P48 Turbo accelerate from 0 to 100 km/h in less than a thousandth of a second – 1,200 times faster than a lunar rocket. Between them, all of the pistons in the engine cover a distance the equivalent of Munich to Cape Town over the course of a season. 2.8 million ignition sparks are generated in an engine over the course of a season. The water pump consumes roughly 18,000 litres in an hour. At this rate, it would fill a bathtub in 20 seconds. The full 600 hp of engine power is transferred to the drivetrain and rear wheels through screws. They weigh just 130 grams – the same as an cube of iron with a 2.5-mm edge. Over the course of a season, over 65,000 litres (17,171 US gallons) of oil are pumped through the engine. During a season, enough heat for 500 sauna sessions is dissipated through the oil. For the engine's final assembly unit, 1,005 designs were drawn up. Placed side by side, they could cover the floor in a 250 m2 apartment. In the interest of sustainability, these drawings were not printed, but were saved as PDF documents.
Applications
References
- Haidinger, Sven (26 December 2019). "DTM-Hersteller einig: Push-to-pass 2020 doppelt so stark, mehr Freiheit bei DRS". motorsport-total.com (in German). Motorsport Total GmbH. Retrieved 26 December 2019.
- "2019 BMW M4 DTM will get a 2.0 liter turbo engine". bmwblog.com. 27 October 2018. Retrieved 27 October 2018.
- "New BMW DTM Engine shows off its Turbo Power Roots". bmwblog.com. 25 April 2019. Retrieved 25 April 2019.