Volvo Engine Brake (Veb); Cruise Control And Engine Brake - PREVOST H3-45 VIP Owner's Manual

5-26 Other Features
WARNING
When descending significant grades, use the
service brake as little as possible. If the engine
does not slow the vehicle to a safe speed, apply
service brake and shift to a lower range. Let the
engine (and engine brake) slow the vehicle. Keep
brakes cool and ready for emergency stopping.

VOLVO ENGINE BRAKE (VEB)

On vehicles equipped with the Volvo Engine Brake
(VEB), the engine brake mode is by default, set to
the AUTO mode at vehicle start-up.
When running in AUTO
is gradually applied to 100% of the braking power
when the driver pushes the brake pedal. Since
AUTO mode will not reduce vehicle momentum
unless the brakes are applied, it will have no
impact on fuel consumption.
The driver can also choose two other modes using
the steering wheel switches; Engine brake LOW
and engine brake HIGH
When set to the engine brake LOW
of the engine brake power will be applied when the
driver releases the accelerator pedal. Using engine
brake HIGH will apply 100% of the braking
power.
It must be noted that since engine brake LOW
and engine brake HIGH
speed upon release of the throttle pedal, they may
negatively impact fuel consumption if used for
extended periods of time.
On vehicles equipped with an engine brake switch,
it is possible to deactivate the engine brake (OFF
mode). To do so, the driver must press the engine
brake switch located on the left side of the
dashboard.
Engine Brake Switch
mode, the engine brake
.
mode, 50%
will reduce vehicle
PA-1619 Owner's Manual H3-45 VIP
NOTE
When using engine brake LOW
mode, pressing the steering switch OFF button
will switch back to the default AUTO
ENGINE
DRIVER
BRAKE
PEDALS
ANY POSITION
ACCELERATOR
PEDAL
RELEASED
BRAKE PEDAL
PUSHED
ACCELERATOR
PEDAL
RELEASED
FIGURE 1: ENGINE BRAKE FORCE APPLIED
ACCORDING TO SELECTED MODE AND DRIVER
PEDAL POSITION
NOTE
Engine brake is safe to use in any road
conditions including adverse conditions.

CRUISE CONTROL AND ENGINE BRAKE

When cruise control is enabled by the driver, the
engine brake mode is forced to AUTO
or HIGH
mode.
ENGINE
BRAKE
MODE FORCE
0%
0%
100%
50%
100%
mode