Buhler 2360, 2335, 2425, 2290, 2375 manual Engine and Eics, Engine Derate and Eics Warning Lights

SECTION 2 - OPERATION

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

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