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GENERAL SERVICE INFORMATION
3TNV88F Service Manual
4-9
Main Electronic Control Components and Features
Droop control
Standard with VM series
Reduces the engine speed by a certain percentage from no
load to full (rated) load in steady state operation. The same
percentage droop is maintained even when the load increases
at any no-load speed.
Isochronous control
Standard with CL series
Optional with VM series
Offers a constant engine speed from no load to full load. The
engine speed does not decrease even when the load increases
at any no-load speed.
Low-idling speed up
Increases the low-idling speed to up to 1000 min
-1
(rpm)
depending on the engine coolant temperature. When the
coolant temperature reaches a predetermined value, this
feature returns the engine speed to the normal low idle setting,
thus reducing the warm-up time.
High-idling speed
down
Optional
Decreases the high-idling speed depending on the engine
coolant temperature. When the coolant temperature falls to a
predetermined value, this feature returns the engine speed to
the normal high idle setting, thus minimizing the emission of
white smoke at low temperatures.
Auto deceleration
Optional
Brings the running engine in low idle mode automatically when
the accelerator pedal is not operated for a predetermined period
of time. When the pedal is operated, i.e., the accelerator sensor
is activated, the low idle mode is cancelled.
Component/feature
Description
3TNV88F_SVM_A4.book 9 ページ 2012年7月26日 木曜日 午後6時4分