Volvo VN, Руководство оператора

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OPERATION 259
ENGINE OPERATION
General
Proper operation, driving techniques and maintenance are key factors in obtaining the
maximum life and economy from a modern turbocharged diesel engine. This section
has operational information about the components that make up the engine.
When changing gears, avoid lugging to extend engine life. When the engine is
operating at full throttle and maximum governed speed cannot be reached or
maintained, the engine is lugging. When approaching a hill requiring more power,
it is necessary to downshift the transmission as the vehicle goes into the grade.
Accelerating to the governed engine speed will give additional power at approximately
the same road speed. For shifting instructions, see the transmission manufacturer’s
operator’s manual.
Always start moving the load in a gear low enough so that the engine can be
accelerated to the governed speed. Then shift to the next gear as the engine
decelerates. For loaded vehicles, do not skip a gear or lug the engine while getting up
to cruising speed. For empty or light loads, it is permissible to skip gears.
When operating on a level highway or at cruising speed, hold the engine speed at
approximately 1400 to 1600 rpm for large displacement engines to achieve power and
economical fuel consumption.
The operator should understand the operating characteristics of the engine the vehicle
is equipped with. Modern diesel engines have maximum torques at much lower
engine speeds than in the past. As such, these engines are designed to perform
satisfactorily at a lower speed. New transmissions with wide ratio steps between
gears demand the use of these engines.