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SECTION 2 - OPERATION
2-51
Engine and EICS
The large 4WD tractors are equipped with
electronic engine controls. The Cummins
Engine Company Electronic Fuel Control
System controls the injection of fuel (both
quantity and timing). The Cummins
electronically engines have a control module, 1,
(N14 engine shown) and related control and
sensing devices are attached to the engine at
various locations.
Tractors equipped with these Electronic
controlled engines have additional electronic
control features. Some of the control features
are tied into the EICS of the tractor and
illuminate certain warning light bar lamps when
a condition is present in the engine that the
Operator needs to be aware of. Some of the
control features are passive to the Operator as
far as visual indications (no lights illuminated)
are concerned, but a definite change in engine
performance will be noticed when the condition
is present.
Engine Derate and EICS Warning Lights
If an alarm condition exists on the Cummins
electronic engine, the system will usually
(depending on source of alarm condition) react
with a change in engine performance output.
The change in engine performance is called an
engine “derate”. The term derate means the
module will control the fuel system of the tractor
to do one of the following:
1. Lower the engine rpm to a preset level (1400
rpm) and allow no acceleration of the engine
above that level.
2. Lower the horsepower output level of the
engine a preset amount (20% of gross
horsepower) but maintain full range of
engine rpm based on throttle position.
3. Lower the engine rpm to a preset level (1400
rpm) and allow no acceleration of the engine
above that level AND lower the horsepower
output level of the engine a preset amount
(20% of gross horsepower).
1
Figure 2-77