Peugeot to Show Next Version of Diesel Hybrid Demonstrator at Frankfurt; A Step Closer to Commercialization in 2010
|The diesel 308 Hybrid HDi.|
Peugeot will use the Frankfurt Motor Show for the world premiere of its new 308 Hybrid HDi, a diesel hybrid which emits 80g/km of CO2 and reduces fuel consumption by 58% in the NEDC Urban Drive Cycle compared to a standard 308 HDi.
The new 308 Hybrid HDi demonstrator represents another step on the path towards the planned commercialization of the technology in 2010. Further evaluation of the original Peugeot 307 Hybrid HDi demonstrator in 2006 (earlier post) has confirmed the choice of a diesel engine, instead of a gasoline engine, as the best option to provide the best reduction in fuel consumption and emissions, according to Peugeot.
The demonstrator’s parallel hybrid powerplant uses an 80 kW (107 hp) 1.6 HDi DPFS diesel engine coupled with a 16 kW (continuous) electric motor providing a maximum power output of 96 kW (129 hp)—comparable to that of the 308 with the 2.0 liter HDi DPFS 100 kW (134 hp) diesel engine—and a 6-speed electronically controlled manual gearbox. A 200V, 5.5 Ah NiMH battery pack provides energy storage, and is recharged via regenerative braking.
General dynamic performance is comparable to a standard 308 HDi. In-gear acceleration, however, both in town and on the open road, is improved with the Hybrid HDi. During in-gear acceleration, the diesel engine is backed up by the electric motor which is able on demand to deliver a power boost of up to 23 kW and 130 Nm (96 lb-ft) or torque.
Fuel consumption in the combined cycle is 3.4 l/100km (69 mpg US) and CO2 emissions are 90 g/km—reductions of 38% compared to an equivalent 308 diesel HDi model.
The engine has been designed to meet the future Euro 5 emissions requirements coming into force in 2009. The 308 Hybrid HDi offers an all-electric range for journeys in regulated urban centers. The vehicle’s aerodynamic profile and use of Michelin Energy Saver low rolling resistance tires further enhance its performance.
Compared to the previous 307 Hybrid HDi demonstrator presented in 2006, the focus of the development has now switched to concentrating on the packaging of the hybrid technology into the structure of the new 308, and to ensure its compatibility with the future Euro 5 emission standards.
To ensure a competitive purchase price, priority has been given to using as many components as possible from current Peugeot vehicles. This has enabled the number of specific parts associated with the hybridization of the 308 to be reduced by around 30% compared to the previous 307 Hybrid HDi demonstrator.
The vehicle is started by a customary ignition key but, unlike a conventional vehicle, this does not start the diesel engine. The electric motor alone is responsible for starting and driving at low speed, while only the diesel engine is used on open roads and highways, with both units coming into play simultaneously to provide quicker acceleration. The system is fitted with a 6-speed electronically controlled manual gearbox able to operate in automatic or manual sequential mode.
A special button provides access to an all-electric “ZEV” Zero Emission Vehicle mode. Operation of the diesel engine is then restricted to more pronounced acceleration phases or high speed driving.
All the powertrain operating modes are controlled by a Power Train Management Unit (PTMU) according to the driver’s requirements.
The driver is informed in real time of the powertrain operating mode by a schematic diagram on the vehicle’s colour multifunction display. Other information is also available, such as the battery charge status or the power train operation mode.