Gasoline Direct Injection Concept

Motor,  Sep 2006  

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Robert Bosch Corp, and Ricardo plc have joined engineering forces to develop a turbocharged, direct injection gasoline engine system. The prototype system, DI BOOST, will offer superior performance and fuel economy and be capable of achieving super ultra low emissions vehicle (SULEV) standards, according to the design partners.

Two prototype DI BOOST engines are in development and combine the performance-enhancing capabilities of modern valve actuation and turbocharging with the improved fuel efficiency and low emissions of gasoline direct injection. The engines are based on GM's 3.6L V6 engine.

The first phase of DI BOOST, the design and procurement of prototype engines, was completed this past January. The next phase, which started in March, concentrates on base engine calibration for best efficiency and driveability. In parallel, vehicle integration is nearing completion. Future phases will focus on achieving SULEV emissions levels via high-pressure start capability and split injection.

Bosch is providing the complete DI Motronic engine management system, including the new, second-generation direct-injection fuel system, as well as ignition, air and exhaust control. Bicardo is using its expertise for prototype powertrain integration and providing base engine calibration work on modern engine dynamometers in Belleville, MI.

"With global fuel prices at record levels, Bosch is pleased to partner with Ricardo to advance technologies that deliver improved fuel efficiency of gasoline engines," said John Moulton, president, powertrain division, Robert Bosch Corp. "The DI BOOST concept is a viable solution that by downsizing engine displacement dramatically improves fuel consumption and performance in gasoline vehicles."

"The DI BOOST concept has clear advantages for automakers in offering dramatically improved fuel consumption in parallel with a more rewarding driving experience for the customer and SULEV emissions levels to benefit the environment," said Jeremy W. Holt, president of Ricardo, Inc., and executive director of Ricardo plc. "Ricardo is pleased to continue its partnership with Bosch in developing a vehicle-based demonstration of this highly promising gasoline engine technology."

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