BMW S85
The BMW S85 is a V10 engine with 40 valves, which was installed in the E60 M5 and E63 M6. It was developed by BMW's Formula 1 department and shares some components with the P86 V8 engine of the BMW Sauber F1 racing car.
Technology
The S85B50 is an extremely high-revving engine, created to much power from a wide range of speeds extract. Thus, its maximum speed is 8250 min -1, it reaches more than 74 kW ( 100 hp ) per liter displacement and has a very high compression ratio of 12.0:1, which outperforms the previous M3 with 11.5:1.
The V10 engine with four -valve technology and individual throttle butterflies with electronic throttle control ( EDR) has the M high-pressure double - VANOS, ion-current knock control, hydraulic valve lash adjuster with bucket tappets, three-way catalytic converter, on- board diagnostics and lateral force- controlled oil supply.
VANOS
The engine has dual variable camshaft control, which can change map- controlled valve timing continuously, resulting in better cylinder filling in all load and speed ranges. This means more power, improved torque curve and good response, reduce fuel consumption and less polluting exhaust gases. As in the racing each cylinder has its own throttle valve that is electronically controlled.
Ion current measurement
Conventional knock sensors have been superseded by the new ion current measurement. Through this technology, the firings are monitored and detected any misfiring, resulting in improved fuel consumption and a higher torque and power output.
Data
Use
Awards
The S85B50 was nominated for the first time at the International Engine of the Year Award in 2005 and also won in the following years in different categories:
- International Engine of the Year (2005 and 2006)
- Best Performance Engine (2005, 2006 and 2007)
- Best New Engine (2005)
- Best Above 4.0 Litre (2005, 2006, 2007 and 2008)
- BMW engine
- Motor model ( V engine )