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Toyota Supra HV-R

Toyota made history by winning the Tokachi 24-Hour Race with its Supra HV-R hybrid race car. It is the first time a hybrid race car has won a competition of any form and Toyota can be expected to build on its position at the forefront of hybrid race machine development given the massive investment it is making in the technology in its road cars.

The 1,080 kg Supra is quite different to roadgoing hybrids as it incorporates a quick-charging capacitor system and relies heavily on the four-wheel energy regeneration system which is designed to efficiently recover a greater amount of the car's energy during rapid braking. The system uses 10kw in-wheel motors in the front wheels in addition to one 150 kW rear-axle mounted electric motor.

In total, the car has a whopping 700 horsepower at its disposal, with 473 bhp coming from the 4,480cc V8 engine and a further 227 hp from the electric motors -- even more importantly, the low down grunt afforded by the electric motors along with the ability to measure and modify the additional torque thousands of times per wheel per second make the car far more controllable than a simple gasoline engined vehicle.

By entering hybrid systems into racing events, Toyota engineers hope to discover ways to make hybrid systems, most famously fitted to the Toyota Prius production car, more efficient and lighter. In only the second year of competition Toyota used -- with success -- the data gained from last year's race in order to develop a new, special racing unit to the limits of hybrid performance.

http://www.ultimatecarpage.com/frame.php?file=car.php&carnum=3283

http://www.autocar.co.uk/News/NewsArticle/Toyota-Supra/226584/
 

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Toyota Supra HV-R

The race car was based on the iconic Supra GT used in Super GT races in Japan. It was modified and equipped with a special racing hybrid system. In order to improve the system's energy regeneration and operating efficiency during the race, the following two distinctive technologies have been incorporated into it:

Three electric motors
A four-wheel energy regeneration and drive system has been adopted which includes in-wheel motors in the front wheels in addition to one 150 kW rear-axle mounted electric motor. Thanks to this energy regeneration system with three motors/generators, the vehicle can more efficiently recover a greater amount of energy during rapid deceleration and braking from high speeds.

Specially Designed Capacitor
In light of the fact that racing involves a repeated acceleration and deceleration under full system performance, a quick-charging capacitor system was adopted instead of the usual rechargeable batteries.

http://www.newspress.co.uk/DAILY_LINKS/arc_jul_2007/53350toy.htm
 
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