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Driveline
Page 9
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The Renault Hybrys is a 6x2 with a 320hp DXi7 engine, an Optidriver Plus automated gearbox and an electric MDS (Motor Drive System) motor. The electrical block in the wheelbase includes power batteries, control electronics, power distribution circuits and the cooling system.
With a wheelbase of 3,900mm, the Hybrys is equipped with a 7.5-tonne front axle and a 13-tonne drive axle running on 22.5in tyres. Front suspension is mechanical; the rear rides on air.
A keyless ignition fires up the electric motor before the diesel engine sparks into life, with the driveline's automatic control system optimising the switch between the two power modes to ensure comfortable, silent driving and much lower fuel consumption depending on operating requirements.
The Hybrys makes use of the kinetic energy produced during braking. transforming it into electrical form and storing it in batteries. This energy is then available to the electric motor both for power and also to run the ancillary equipment around the truck, such as power steering, heater and air-con. The electric motor can also be used where the diesel engine is overloaded —on hills, for example.
The batteries are recharged during retarding and braking, or by hooking them up to an outside electricity supply.
New electronic architecture allows the optimum use of the diesel and electric power. This architecture also oversees use of the automated gearbox, thus controlling the whole of the driveline. This, in turn, reduces noise emissions. The optimisation of the vehicle's energy performance means a substantial cut in fuel consumption and CO, emissions.