Porsche Cayenne Hybrid in LA autoshow
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Porsche is targeting average fuel consumption figures of 9.8 liters/100 kilometers in the New European Driving Cycle and about 24 miles per gallon in the US FTP cycle for the Cayenne Hybrid, and future developments may allow Porsche engineers to push towards an average fuel consumption figure of 8.9 liters/kilometer (approximately 26 miles per gallon).
The Cayenne Hybrid will feature a full-hybrid design where the hybrid module (clutch and electric motor) is positioned between the combustion engine and the transmission rather than having the hybrid drivetrain branching output along various lines and in various directions via a planetary gearset. Porsche selected this design because the in-line configuration of the hybrid components are more compatible with the existing Cayenne platform, this system in testing is more fuel efficient, and because this configuration is a better fit for Porsche as it will provide improved acceleration and engine flexibility compared to a conventional Cayenne.
Coordinating the car’s three main components – the combustion engine, the electric motor and the battery – is the Hybrid Manager, the heart of the Cayenne Hybrid. The Hybrid Manager, which oversees some 20,000 data parameters as compared to only 6,000 data parameters for a conventional engine, is one of the most powerful technologies found in any hybrid vehicle.
Other unique features of the Cayenne Hybrid designed to decrease fuel consumption include the power steering and vacuum pump for the brakes, as well as the air conditioning, which operate on electric power. Technical components, such as the oil pump in the Cayenne’s automatic transmission, have been replaced by electrically powered units. The Cayenne Hybrid’s electro-hydraulic steering – a first for a vehicle of its kind, will ensure the Cayenne Hybrid drives like a Porsche with predictable and safe handling characteristics and the agility that is expected of a Porsche SUV.
Porsche plans to introduce similar hybrid technology in a version of its Panamera four-door Gran Turismo. The Panamera will debut in 2009, with a hybrid to follow.
Porsche is also presenting a milestone in automobile development to the well-informed public attending the most significant trend show in North America with their great knowledge of history and technical development over the years: The electric-drive Lohner-Porsche from the year 1900, one of the world’s first zero emission vehicles and, accordingly, a forerunner for hybrid drive.
With its future-oriented electric motors in the wheel hubs, the Lohner-Porsche was acknowledged as the absolute sensation at the Paris World Fair in 1900. On loan from the Technical Museum in Vienna, Austria, this outstanding achievement in technology protected today as a universal monument is now to be seen the first time outside of Europe at an auto show.
It was this vehicle, Ferdinand Porsche’s first major project completed at the time without layshafts and without a transmission that gave the 24-year-old automobile genius his breakthrough as a pioneer in the history of the automobile. Shortly thereafter Ferdinand Porsche added a combustion engine providing power for the electric generator to the electric drive system with two internal-pole motors in the front wheels. This made Porsche’s hybrid drive ready for production and created a unique highlight at the Paris Auto Show in 1901.
More than 100 years later the engineers at Porsche’s Weissach Research & Development Center took up precisely this concept, creating the future-oriented high-tech Cayenne Hybrid, a unique vehicle combining superior efficiency with equally superior driving dynamics. The Full-Parallel-Hybrid System developed by Porsche combines the best of two worlds so efficiently that the series-production will consume less than 9 liters/100 km. An equally important point was to maintain Porsche’s typically ambitious standards in terms of vehicle weight and driving dynamics also in the hybrid model. And perhaps the best news is that Porsche will be introducing this very economical SUV before the end of this decade.
Source: Porsche
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