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Hybrid tech for new Porsche racer

2010-02-12 08:56
The Porsche 911 GT3 R with hybrid drive will be unveiled at March's Geneva Motor Show, the company has announced.

Ushering in an exciting new phase of "green" motorsport, Porsche has already said this car will carry its hopes in the 24-hour Nurburging race.

This 911 features hybrid technology developed for F1 by Williams (before KERS was disallowed in the 2009 race season) and here an electrical front axle drive with two electric motors producing 60 kW supplements Porsche's 353 kW 4.0-litre flat-six engine.

Also, rather than using batteries as a conventional hybrid road car would, the hybrid GT racer has an electric flywheel (an electric motor itself able to spin up to 40 000 r/min) to deliver energy to generate power for the electric motors on the front axle.

This flywheel is charged whenever the driver applies the brakes, and the energy usually wasted as heat when braking is now converted into extra drive power for use when accelerating out of a bend or overtaking, for example. It is able to supply up to 120 kW to the electric motors at the front axle, power that is available to the driver for about six to eight seconds.

Porsche also states that, depending on race conditions, their new hybrid drive system also saves fuel, which has the knock-on effect of lighter fuel tank or less frequent pit stops.

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