Automatic Boost Power - Doosan DX140R Shop Manual

Automatic Boost Power

Feature Description
Boost Power is a torque curve that is calibrated for a higher
torque/horsepower than the normal engine rating and is
TM
available on QSB, QSC, CELECT Plus, QSM11, QSX15,
QSK19, QSK45, and QSK60 industrial engines. The Electronic
Control Module (ECM) will monitor engine speed, intake
manifold temperature, and coolant temperature to determine if
Boost Power can be activated. If Boost Power is available, the
operator can activate Boost Power using a dash-mounted
switch. The engine will switch to the higher torque curve or
power rating for a limited period of time. The higher torque curve
or power rating is calibrated for an intermittent or noncontinuous
torque or power rating which is higher than the normal torque or
power rating for the engine. Boost power is not available if
coolant temperature or intake manifold temperatures are above
calibrated thresholds. If engine speed is below a calibrated
threshold, then Boost Power will not be time limited.
Automatic Boost Power will provide the operator with enhanced
torque or power for a fraction of the operating period. The ECM
will monitor engine speed, intake manifold temperature, percent
load, and coolant temperature to determine if automatic Boost
Power can be activated. If automatic Boost Power is available,
the engine will switch to the enhanced torque or power rating for
a limited period of time. The Original Equipment Manufacturer
(OEM) equipment users manual will document the time periods
that automatic Boost Power is available, since it is application
specific. Automatic Boost Power is not available if coolant
temperature or intake manifold temperatures are above
calibrated thresholds. If engine speed or percent load is below a
calibrated threshold, automatic Boost Power will not be
available. If coolant temperature or intake manifold temperature
rise above calibrated threshold, then automatic Boost Power will
be deactivated. Automatic Boost Power is available on QSB,
QSC, QSM11, and QSX15 industrial engines.
Driver Activation/Deactivation
To activate Boost Power, the operator must turn on a dash-
mounted switch. To deactivate Boost Power, the operator must
turn the switch off. Boost power will engage if the engine
operating conditions are There is no operator interaction to
activate or deactivate automatic Boost Power.
Interaction with other Features and Parameters
Boost power must be enabled in order to enable automatic
Boost Power.
Disadvantages
A possible customer complaint associated with this feature will
be intermittent low power.
Boost Power must not engage due to the Boost Power load
threshold is set above the highest load experienced during
normal engine operation
QSB4.5 Engine SP001671
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