Australia. Porsche will offer a 3.6-litre V6 hybrid version of its Cayenne SUV by the end of this decade that will cut CO2 emissions and fuel consumption by at least 25 per cent.It will boast 390 kW of power (530 hp) at 6,500 rpm and 680 Nm of torque (501 lb-ft) between 2,200 and 4,500 rpm.
To be called Cayenne Hybrid, this new model will feature a parallel full hybrid system where the hybrid’s clutch and electric motor are positioned in line between the conventional petrol engine and transmission.
Prototypes have already achieved fuel consumption of 9.8 litres /100 kms in testing on the New European Driving Cycle (NEDC), with Porsche confident of reducing fuel consumption even further to 8.9 litres /100 kms by the time the Cayenne Hybrid goes on sale. Today’s Cayenne, by comparison, with Direct Fuel Injection (DFI) 3.6-litre V6 engine returns 12.9 litres /100 kms on the NEDC cycle.
Porsche favours the parallel full hybrid system instead of the branched or split hybrid concepts used by other manufacturers due to the parallel system’s superior packaging, improved acceleration and engine flexibility, as well as compatibility to the existing Cayenne platform.
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, all operating on electric power. Technical components, such as the oil pump in the Cayenne’s automatic transmission, have been replaced by electrically powered units.
Porsche plans to introduce similar hybrid technology in a version of its Panamera four-door. The Panamera will debut in 2009, with a hybrid to follow later.