CUMMINS ANNOUNCES ENGINES FOR LOW EMISSIONS HYBRID INSTALLATIONS
16 November 2005
Darlington, UK (November 16, 2005) - Cummins announces its low emissions, fuel efficient Euro 4 ISLe and ISBe engines are the ideal choice for the latest hybrid applications. Matched to the system they provide the optimum balance of low emissions, low fuel consumption and low noise. Working with the transmission they can significantly enhance the performance of transit buses, suburban coaches and articulated buses in the toughest stop-go urban duty cycles.
The Cummins ISLe has been enhanced with increased performance for Euro 4, providing a highly flexible power choice with a light weight, compact size and fuel efficient 8.9 litre configuration. At Euro 4, the engine and exhaust filtration system will provide a 30% reduction in NOx and 80% reduction particulates, coupled with a 7% improvement in fuel economy and an increase in service intervals up to 60%. These benefits can be increased further in a hybrid installation. The Cummins ISL is proven in this field and is the engine of choice for North American hybrid bus installations.
The ISBe has also been improved in key areas for Euro 4, with significant increase in torque and power coupled with substantial reductions in fuel consumption and running costs. Matching the same emissions reductions as the ISLe, the ISBe will also provide a 7% improvement in fuel economy, and an increase in service intervals up to 100%.
In order to provide the hybrid drive system the ISLe or ISBe engines are linked to a transmission such as the Allison 40/50 EP Electric Hybrid transmission. The Allison electric drive system is one of the most efficient parallel hybrid systems available in the world today. The Cummins engine and the two electric motors, driving through the infinitely variable transmission, provide two sources of power to move the bus.
During hybrid operation emissions are reduced by 90%, coupled with significant demonstrated fuel economy benefits. It is practically silent during hybrid operation. When the bus accelerates the battery powered electric motors assist the diesel engine. Once the vehicle is up to speed the diesel engine is used to maintain the speed. At the same time, the engine driven generator charges the batteries for electric drive. In addition the bus's regenerative braking captures energy normally lost as brake heat and converts it to electric energy stored in the energy storage system or battery.
For more information please contact Allison Transmissions via www.allisontransmissions.com.
Cummins Inc. is the world's largest independent manufacturer of diesel engines. With over 24,000 employees, Cummins reported sales of $8.4 billion in 2004 and produced over 700,000 engines. A substantial manufacturing presence in Europe includes the mid-range engine plant at Darlington UK and the high horsepower engine plant at Daventry, UK