Renault Premium DXi 11, Service Manual

Page: 152 / 400

C4-8
Driving
A single control under the steering wheel serves to activate the different retarders.
There are 4 possible options:
– Control with 1 active position: (see page C4-9). This serves to actuate the exhaust
brake (with manual gearbox).
– Control with 2 active positions: (see page C-4-10). This serves to actuate the exhaust
brake and the engine brake "optibrake" (with manual gearbox).
– Control with 3 active positions: (see page C-4-12). This serves to actuate the exhaust
brake and the engine brake "optibrake" (with Optidriver 2 gearbox).
– Control with 5 active positions: (see page C-4-14). This serves to actuate the exhaust
brake, the engine brake "optibrake" and the hydraulic retarder.
Switch
A = Not activated
:
– Manual operation (see page C4-9).
B = Activated :
– Retarder coupling to foot brake (main
brake).
The exhaust brake, engine brake and prop shaft
retarder feature is activated whenever the foot
brake pedal is actuated, if the retarder control
lever (1) is in position "0".
The retarder feature is inhibited for the first
5 times the brake pedal is depressed after the
ignition is switched on.
The retardation power is modulated according
to the vehicle load and the pressure exerted on
the brake pedal. Warning light (Q) is out.
Coupling of retarder with cruise control
(constant speed)
Warning light (Q) comes on and a blue sector
appears on the rev counter (T), if the prop shaft
and/or engine-brake functions are active (see
page C4-3).