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Peugeot’s Diesel 3008 Hybrid4
24 August 2010
|Peugeot’s 3008 Hybrid4. Click to enlarge.|
Peugeot has provided more details on its diesel 3008 Hybrid4, due to go onsale in Europe in the spring of 2011. (Earlier post.) The hybrid crossover, to be produced in France (in Sochaux and Mulhouse), will be the first full hybrid diesel to hit the market.
The 3008 HYbrid4 is powered by a 2.0-liter HDi FAP 120 kW (163 bhp) diesel engine with an electric motor offering a maximum power output of 27 kW (37 bhp). A maximum torque of 500 N·m (369 lb-ft) is available, split 300 N·m (221 lb-ft) at the front from the HDi diesel engine and a maximum of 200 N·m (148 lb-ft) at the rear generated by the electric motor.
The design of the powertrain (engine powering the front wheels, motor powering the rear) enables 4-wheel drive, an all-electric mode, and fuel consumption of 3.8 litres/100 km (62 mpg US), with 99 g/km of CO2. On higher specification versions, emissions can rise to 104 or 108 g/km of CO2 in the combined cycle.
A selection knob on the center 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 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 excel
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.
“Sport” mode favours quicker gear changes at higher engine speeds than normal mode.
Components of the powertrain include:
The 2.0 litre HDi FAP 120 kW (163 bhp) diesel engine. With a capacity of 1997 cm³, this Euro 5 engine develops a maximum power of 120 kW at 3750 rpm and a maximum torque of 300 Nm at 1580 rpm. It uses the latest generation ECCS (Extreme Conventional Combustion System) combustion chamber design, a variable-geometry low-inertia turbocharger, a high-pressure injection pump allowing a maximum pressure of 2000 bar in the common rail and solenoid injectors with eight apertures. This is combined with the latest generation “octosquare” Eolys additive-enhanced particulate emission filter (FAP) system.
Electronically-controlled 6-speed manual gearbox (BMP6). The HDi diesel engine is linked to an electronically controlled manual six-speed sequential gearbox. Its electronic control enables significant savings in fuel consumption in automatic mode compared to a traditional automatic gearbox or even a traditional manual gearbox. With HYbrid4 technology, the rear electric motor becomes active during gear changes. This results in smooth gear changes for optimum comfort.
Latest-generation STOP & START system. This system places the HDi diesel engine in standby when the vehicle is at a standstill (at traffic lights, a stop sign or in a traffic jam, etc) and when the vehicle is being driven in electric mode. This high voltage STOP & START system with 8 kW output can also generate the electricity needed for operation of the electric motor under all circumstances if required (four wheel drive mode).
Rear suspension. The rear electric module, transferable across several different platforms, comprises a multiarm rear suspension within which are housed the electric motor and the reduction gearbox. In terms of vehicle dynamics, the ESP of the 3008 HYbrid4 incorporates an improved traction control system (ASR) able to exploit the car’s four wheel drive capabilities to the full on challenging surfaces.
Electric motor. The synchronous permanent magnet electric motor, located at the rear of the vehicle, provides a constant 20 kW (27 bhp), and has a peak output of 27 kW (37 bhp). It generates a constant torque of 100 Nm, or a peak of 200 Nm.
PTMU (Power Train Management Unit). The PTMU is an electronic controller that automatically manages the different operating modes of the HDi diesel engine. An inverter and a converter are used to control the electric power. The inverter controls the torque of the electric motor by regulating the current from the high voltage battery pack. This operates in a voltage range of between 150 and 270 volts. The converter converts the 200 volts from the high-voltage battery pack into 12 volts to supply the vehicle’s onboard systems. On the 3008 HYbrid4, these components have been made as small as possible to optimize the installation in the vehicle.
High-voltage NiMH battery pack. The NiMH batteries are located under the trunk sill, near the electric motor. This high-voltage battery pack comes in addition to the standard 12V battery under the bonnet, which carries on performing its normal duties. In the medium term, Peugeot notes, this battery technology remains the most appropriate in terms of cost and industrialization for vehicles produced in large volumes.
Energy recovery. An energy recovery system enables kinetic energy to be transformed into electrical energy to recharge the NiMH batteries during deceleration (release of the accelerator and braking).
To develop its HYbrid4 technology, the PSA Peugeot Citroën Group teamed with Bosch on the electric motor, the power electronics, the reversible high-voltage alternator (STT) and other systems managing the dialogue between these components and the braking and trajectory correction systems (ABS and ESP). Sanyo is the provider of the NiMH batteries.
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