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By launching the world’s first diesel full hybrid vehicle – the Peugeot 3008 HYbrid 4 – Peugeot will be writing a new chapter in motoring history. The combination of a fuel efficient 2.0 litre 163 bhp HDi diesel engine and a 37 bhp electric motor is the optimal combination for a hybrid vehicle.

Unlike previous hybrid vehicles which have chosen to use a less fuel efficient petrol engine, the Peugeot 3008 HYbrid4’s diesel engine provides superior Combined Drive Cycle fuel consumption of 74.4mpg, and CO2 emissions of 99g/km. The Peugeot 3008 Hybrid4 is designed to appeal to demanding, technophile customers who are in search of a rewarding and original vehicle. In terms of performance, the Peugeot 3008 HYbrid4 benefits from the combined power of the HDi diesel engine and electric motor during acceleration and when an immediate surge of power is required (the “boost” function). The maximum combined power output is 200 bhp, 163 bhp from the 2.0 litre HDi FAP diesel engine and 37 bhp from the electric motor. A maximum torque of 500 Nm is available, split with 300Nm at the front from the HDi diesel engine and 200 Nm at the rear generated by the electric motor.

With the Peugeot 3008 equipped with HYbrid4 technology, the aim is to appeal to customers who expect both environmental-friendliness and technological sophistication, and also genuine driving enjoyment. Indeed, as well as the social benefit of the steep reduction in fuel consumption, the level of performance provided by this technology will delight even the most demanding customers in terms of road holding, responsiveness, driveability, peace of mind regardless of road conditions and the possibility of enjoying silent operation in town in the all-electric mode.

HYbrid4 technology brings together Peugeot’s best technologies and experience: HDi diesel engines, electric vehicle knowledge, second-generation Stop & Start and electronically-controlled sequential manual gearboxes. The “hybrid” power train simply combines an HDi diesel engine and an electric motor. With their exceptional efficiency, HDi diesel engines are thermodynamically more efficient than a petrol engine and offer a 30% reduction in fuel consumption. Clearly the HDi diesel engine is the best internal combustion engine choice.

For the “electric” component, Peugeot has historical expertise in the field of electric vehicles. To date, the 106 Electric, marketed between 1995 and 2003, remains the world’s best selling zero emissions car (in total nearly 10,000 vehicles were produced). At the end of 2010, Peugeot will become the first to launch a latest-generation 100% electric vehicle in Europe, the Peugeot i0n.

Pursuing the common sense approach of capitalising on the best existing components and expertise, it was only natural to use Peugeot’s electronically-controlled 6-speed manual gearbox, not only for its engine management capabilities but also for its ability to optimise fuel consumption. To improve performance even further a second-generation STOP & START system is also used. Changeover from the HDi diesel engine to the electric motor occurs automatically, due to a STOP & START system which places the HDi diesel engine in standby and restarts it as and when conditions require (the operation of the accelerator pedal, low battery charge level, etc…).

The two power sources also complement each other in certain driving conditions (“boost” effect during hard acceleration, or when overtaking another vehicle, for example). The performance of the HYbrid4 is therefore directly comparable to that obtained with a single HDi diesel engine of a much higher capacity, with good levels of responsiveness backed by a real breakthrough in terms of reduced fuel consumption and CO2 emissions (around 35 % less in the combined cycle for equivalent performance).

The electric motor and its ancillary equipment (inverter, converter, etc) are fitted at the rear of the vehicle. This provides a number of advantages not only in terms of customer benefits and it also helps reduce costs and optimise the production process. The original layout of the Hybrid4 system allows for the possibility of four-wheel drive. The HDi diesel engine drives the front wheels, while the electric motor (in the rear drive train) drives the rear wheels. Everything is controlled electronically (“by wire”) and there are no mechanical links between the front and the rear drivetrains. This gives the system many advantages over a “traditional” mechanical system.

Firstly, it avoids the need for any major redesign of the vehicle’s engine compartment, while also improving weight distribution. It also leaves intact the possibility of using a range of different capacity engines, for possible future introduction. Secondly, this architecture is achieved by means of the use of a simple and compact rear module containing the electric motor, its ancillary equipment and also the rear drive train and suspension. The costs of the rear module are, therefore, reduced because of the technical possibility of deploying the same HYbrid4 technology into different market segments, in different body shapes, etc…, regardless of the type of internal combustion engine used.

A real breakthrough in terms of reducing fuel consumption and CO2 emissions, while improving dynamic performance levels, providing four-wheel drive and an electric only mode, HYbrid4 technology brings a number of benefits without compromises. Furthermore, the driveability, safety and eco-efficiency of the system are based on simple, reasonable and consistent technological choices.

Text and Pictures: Peugeot

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