Mack V-MAC IV, Руководство оператора

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54 V-MAC Co-Pilot Operator's Manual
Engine Speed Control
Engine Speed Control Operation
The vehicle management and control (V-MAC) IV system also allows the operator to
set and maintain increased engine speeds. The system provides two different speed
control functions: Electronic Hand Throttle control and PTO control. electronic hand
throttle (EHT) controls engine speed when PTO is not engaged.
Both systems allow two modes of control:
1 Single Speed Control (SSC) increases the engine RPM to a speed preprogrammed
into the system memory. This mode is intended for operation of the PTO at
maximum efficiency.
2 Variable Speed Control (VSC) allows the driver to set any engine RPM within
the preprogrammed low and high limits set in the system memory. This mode is
primarily intended for general PTO applications and engine warm-up.
Note:
Brake conditions are configurable,
but the standard setting is park brake on
and service brake off to engage.
Single Speed Control (SSC)
To use single speed control functions, the following conditions must be met:
1 For power takeoff (PTO) operation, the PTO must be engaged. For electronic hand
throttle (EHT) operation, the service brake must be OFF.
2 The clutch must be engaged (not pressed).
To activate SSC, move the Speed Control switch to the ON position, then press and
release the SET switch. The engine speed (RPM) will jump to the preprogrammed
speed. SSC can also be programmed for Auto Set mode. When enabled, simply
move the Speed Control switch to the ON position and engage the PTO or activate
a customer-defined switch (usually setting the park brake). Engine speed will go
to the pre-programmed speed.
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