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-only mode. It significantly reduces fuel consumption and emissions in urban driving conditions while also enablingthe HDi diesel engine to be restarted instantly and smoothly, when required.
The "high voltage" STOP & START system has a maximum output of 8 kW and can generate enough energy to supply the power requirements for the rear electric motor if required (four-wheel drive mode).
To ensure a dynamic performance on a par with Peugeot’s reputable road holding standards, the rear electric module also includes a multi-arm rear suspension within which are housed the electric motor and the reduction gearbox.
The ESP system fitted to 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. The performance of the system can be enhanced by the fitment of optional 16’’ ‘Mud & Snow’ tyres.
The synchronous permanent magnet electric motor is located at the rear of the vehicle. It provides a constant 27 bhp, with a peak output of 37 bhp. It generates a constant torque of 100 Nm, or a peak of 200 Nm when necessary.
PTMU (Power Train Management Unit)
The PTMU is the electronic control unit that automatically manages the different operating modes of the HDi diesel engine and the electric motor, programmed to optimise fuel consumption.
An inverter and a converter are used to control the electric power. The inverter controls the torque of the electric motor by regulating the electrical current supplied from the high-voltage battery pack. It operates in a voltage range of between 150 and 270 volts. The converter reduces the 200 volts from the high-voltage battery pack into 12 volts to supply the vehicle’s onboard systems.
On the Peugeot 3008 HYbrid4 all these components have been made as compact as possible to optimise the installation and weight effect in the vehicle.
High-voltage battery pack
The Ni-MH (Nickel Metal Hydride) batteries are located under the boot floor, near the electric motor. The high-voltage battery pack is in addition to the standard 12V battery under the bonnet, which carries on performing its normal duties.
In the medium term, this battery technology remains the most appropriate in terms of cost and industrialisation for vehicles produced in large volumes.
An energy recovery system (the electric motor becomes a generator) enables the kinetic energy created by the vehicle to be transformed into electrical energy to recharge the Ni-MH batteries during deceleration (release of the accelerator pedal and during braking). This recovery system enables the driver to re-deploy the "free" (Kinetic) energy to reduce fuel consumption accordingly.
A 7’’ 16/9 colour screen or a multi-function display, according to the car’s specification, informs the driver in real time of the operating status of the hybrid power train. It also shows, for a given journey, operating times in different modes and the status of the battery charge.
On the instrument panel the left-hand dial indicates the percentage of power used or recovered during phases of braking or deceleration. Different scales indicate the battery status: Charge, Eco (optimal operating range), Power, Boost (maximum use jointly with the HDi diesel engine).
To develop its HYbrid4 technology, the PSA Peugeot Citroën Group has teamed up with suppliers offering the best expertise in each field. Based on the manufacturer’s technical specifications, BOSCH has provided its expertise with respect to the electric motor, the power electronics, the reversible high-voltage alternator / generator and other systems managing the dialogue between these components, the braking and trajectory correction systems (ABS and ESP). Similarly, SANYO has provided its extensive knowledge in the field of Ni-MH high-voltage batteries.