Volvo VN, Operator'S Manual

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OPERATION 303
Idle Shutdown Timer
The idle shutdown timer can be programmed to shut the engine down after a specific
engine idling time. This programming cannot be changed by the operator, but can be
done using special tools. Contact your authorized Volvo Truck dealer for details.
The permitted idle time can be set to the following time intervals:
Volvo – 1 to 40 minutes
Cummins – 1 to 100 minutes
When the idle shutdown feature is enabled, the engine will typically shut down at the
set time under the following conditions:
Vehicle speed is 0.
Engine is running at idle speed.
Coolant temperature is above 45°C (113°F).
Parking brake is applied (Volvo engines only).
These are standard choices when the vehicle is delivered. For more information about
other customer adaptation choices, contact your authorized Volvo Truck dealer.
Uphill Operation
For best performance, allow engine speed to reach the bottom of the rated torque range
before downshifting. Continue to downshift in this manner until a gear is reached that
will maintain the desired speed. Continue to operate at the rated torque if the vehicle
will make it to the top without a downshift. Begin upshifting as the grade of the hill
decreases and the engine begins to accelerate above 1600 rpm. Driving this way will
give the best fuel economy and performance.
Note:
Allowing the engine to lug down to the end of maximum torque range is
permissible if the vehicle is cresting the top of a hill. However, extended operation at
engine speeds below the maximum torque range (usually 1000 to 1200 rpm) will raise
exhaust temperature and cylinder pressure. This can lead to reduced engine life.