Peugeot Introduces 3008 HYbrid4 Sedan
The Peugeot 3008, with HYbrid4 technology, is the first diesel “Full Hybrid” production car to be marketed in the world. This car is the culmination of a project which required every ounce of expertise on the part of Peugeot’s engineers, to obtain a result on a par with the Marque’s environmental demands while at the same time providing high levels of driving enjoyment. It is also an original and virtuous association of diesel and electric power.
An obvious association
Adapting HYbrid4 technology to the 3008 crossover makes obvious sense. This successful crossover results from the hybridization of several motoring concepts: SUV, saloon, compact MPV, coupé... Added to this are the benefits of HYbrid4, which in the present case and for the first time combines diesel and electric power to offer the perfect response to customer expectations: “ecological” four wheel drive, controlled power, a high level of safety, assured modularity and a new driving sensation, all within an environmentally responsible approach.
Driving enjoyment for the next generation
For Peugeot, the legitimacy of this technology goes well beyond its eco-efficiency. It must also provide new driving sensations, improved driveability and improved driving enjoyment.
These new sensations find expression in a number of ways: -silent operation, with the possibility of driving in electric only mode,
- peace of mind offered by the safety inherent in four wheel drive,
- high performance combined with high levels of driveability,
- unique freedom and simplicity of use with the possibility of choosing four operating modes: ZEV, 4WD, Sport, Auto.
In terms of performance, the 3008 HYbrid4 can benefit from the combined power of the HDi diesel engine and electric motor during acceleration, for an immediate surge in power (“boost” function). The maximum combined power output can then reach 147 kW (200bhp) through the addition of 120 kW (163 bhp) from the 2.0 litre HDi FAP diesel engine and the temporary peak of the electric motor (27 kW, or 37 bhp). A maximum torque of 500 Nm is available, split 300 Nm at the front from the HDi diesel engine and a maximum of 200 Nm at the rear generated by the electric motor. This level of performance gives the 3008 HYbrid4 recordbreaking credentials in terms of the CO2 emissions/ maximum power ratio.
The end result is a crossover with a length of 4.36 m, four wheel drive, a maximum power output of 200 bhp, fuel consumption in the combined cycle of only 3.8 litres/100 km and emissions of 99 g/km!
On higher specification versions, emissions can rise to 104 or 108 g/km of CO2 in the combined cycle.
In terms of road holding, this innovative power train is well served by the chassis, recognised for its dynamic qualities. The rear module of the HYbrid4 system also includes a multi-arm rear suspension system providing the guarantee of excellent road holding.
Simplicity of use
From a functional point of view, a selection knob on the centre console enables the driver to choose between four different operating modes: “Auto” mode: the electronics automatically control the entire system, including transitions between the HDi diesel engine and the electric motor. This allows optimal driving with a mix of low fuel consumption and dynamic driveability,
“ZEV” mode (Zero Emission Vehicle) provides access to an extensive all-electric mode. In this case, activation of the HDi diesel engine is programmed to coincide with more sustained phases of acceleration. This requires the high-voltage batteries to be sufficiently charged. The vehicle then becomes a “city run-around” par excellence thanks to the total absence of noise and emissions. The driver can apply this mode to drive discreetly around town or demonstrate the silence of the vehicle in electric mode, etc,
Four-wheel drive mode (4WD) instructs both power trains to operate together as far as possible; the rear wheels are then driven by the electric motor and the front wheels by the HDi diesel engine. Offering peace of mind, safety and driveability, four-wheel drive accentuates the vehicle’s dynamic character. Indeed HYbrid4 technology, at low speed, allows all-terrain capabilities equivalent to those of an SUV: the driver will no longer be worried by the prospect of a muddy path or a snowbound uphill drive to the ski resort;
“Sport” mode favours quicker gear changes at higher engine speeds than normal mode. In this mode, the notion of “controlled power” comes into its own: coupling of the diesel engine with the electric motor provides more dynamic performance, optimally distributed and transmitted to the road by the four wheel drive for a level of stability and driveability that will appeal to all motoring enthusiasts.
With a 3008 benefiting from HYbrid4 technology, the aim is to appeal to customers who expect not only environmental-friendliness and technological sophistication, but also real driving enjoyment.
Indeed, as well as the social benefit of a 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 and peace of mind, regardless of road conditions, with the possibility of enjoying silent operation in town in all-electric mode.
Capitalizing on the Best Know-How
HYbrid4 technology is based on the combined use of the best technologies developed by Peugeot’s engineers: diesel engine, electric motor, second-generation STOP & START and an electronically-controlled sequential manual gearbox.
An Original Hybrid Power Train
The “hybrid” power train basically combines a diesel engine and an electric motor. Initially, Peugeot has relied logically on the recognised expertise of the PSA Peugeot Citroën Group in the field of diesel engines with HDi FAP technology. With their exceptional efficiency, HDi FAP diesel engines thermodynamically more efficient than a petrol engine and offering like-for-like fuel consumption of 30% less are clearly the best internal combustion engine choice. In the future, and for markets where diesel is less popular, a petrol combustion engine may also serve as the base for HYbrid4 type hybridization.
For the electric component, Peugeot has a historical
expertise in the field of electric vehicles. To date, the 106 Electric, marketed between 1995 and 2003, remains the world’s highest selling zero emissions car (in total the PSA Group produced nearly 10,000 vehicles, making it a genuine industrial pioneer in this field). At the end of 2010, Peugeot will continue in this vein by becoming the first manufacturer to launch a latest-generation 100% electric vehicle in Europe, the Peugeot I0n.
Pursuing this common sense approach of capitalising on the best existing components and expertise, it was only natural to use the electronically-controlled 6-speed manual gearbox (MCP), not only for its engine management capabilities but also for its optimisation of fuel consumption. In the same perspective, a second-generation STOP & START system is used.
The Choice of a Parallel Architecture
The choice of architecture was also guided by the search for optimal efficiency and consistency. Hybrid technology uses two power trains which can operate alternately or simultaneously:
- the HDi diesel engine operates in its most optimal operating window on longer, out-of-town journeys. A diesel engine still remains the most efficient and versatile choice to power any vehicle,
- the electricmotor takesover from the HDi diesel engine in phases of lower power demands, particularly when starting up or driving at low speed and decelerating (energy recovery). These are precisely the features that characterise urban driving. Changeover from the HDi diesel engine to the electric motor occurs automatically, thanks to a STOP & START system which places the HDi diesel engine in standby and restarts it as and when conditions require (accelerator pedal usage, low battery charge level, etc),
- the two power sources also complement each other in certain driving conditions (“boost” effect during strong acceleration, 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
An Original and Intelligent Layout
The electric motor and its ancillary equipment (inverter, converter, etc) are fitted at the rear of the vehicle. This results in a number of advantages not only in terms of customer benefits but also from the standpoint of the project’s economic and industrial model .
Four wheel drive
This original layout allows the possibility of four wheel drive: the HDi diesel engine under the bonnet drives the front wheels, while the electric motor (in the rear drive train) drives the rear wheels.
Since everything is controlled electronically (“By wire”) with no mechanical link between the front and the rear, this system has many advantages over a “traditional” integral mechanical transmission system (with a prop shafts):
- no architectural constraints affecting layout and style within the passenger compartment (interior capacity preserved);
- 4x4 and environmental-friendliness are no longer contradicting terms.
A viable technical and economic solution
The rear installation of the vehicle’s “electric components” provides a new technical and economic solution. Firstly, it avoids the need for any major redesign of the engine compartment, while also allowing a better weight distribution. It also leaves intact the possibility of using larger capacity engines.
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 HYbrid4 technology in different segments, on different body shapes, etc, regardless of the type of combustion engine used.
A real breakthrough in terms of improved fuel consumption and CO2 emissions, dynamic performance levels, four wheel drive, electric only mode, etc, the
HYbrid4 technology brings a number of benefits without any compromises. Furthermore, the driveability, safety and eco-efficiency of the system are based on simple, reasonable and consistent technological choices.
The 3008 crossover has been chosen as the first application of this innovative technology.
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