5-26 Other Features
PA-1628Operator's ManualH3-45 COACH
WARNING
When descending significant grades, use the ser-
vice 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 mode, the engine brake 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 mode, 50% 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 will reduce vehicle 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
NOTE
When using engine brake LOW or HIGH
mode, pressing the steering switch OFF button will
switch back to the default AUTO mode.
DRIVER
PEDALS
ENGINE
BRAKE
MODE
ENGINE
BRAKE
FORCE
ANY POSITION 0%
ACCELERATOR
PEDAL
RELEASED
0%
BRAKE PEDAL
PUSHED
100%
ACCELERATOR
PEDAL
RELEASED
50%
100%
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 mode and
the engine brake will progressively engage up to
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