Recover Strategies - New Holland 667TA/EEG Repair Manual

RECOVER STRATEGIES

•
Control of fuel leaks.
In the case of fuel supply problems, the system
controls the engine with suitable constant power
values obtained with a low number of rev and high
torque values in order to inject the maximum quantity
of fuel.
•
Control of pressure in the rail.
When the pressure in the rail exceeds safety values,
the engine reduces power.
•
Synchronism problems
In the case of synchronism problems, faulty rev
s e n s o r s, t h e s y s t e m c o n t r o l s t h e e n g i n e by
increasing the number of revs in order to improve
interpretation of the signals.
•
Power restrictions as operating temperature
increases.
When the temperature of the supercharging air rises
above 88° C (190° F), power reduction is started,
when a temperature of 120° C (248° F) is reached,
performance is further reduced and is comparable to
that of the same engine if it were aspirated.
•
Reduction of power as reference temperature
varies
In normal operating conditions, the system knows the
supercharging air, oil and water temperatures.
If the temperature of the engine water is not
available, the system takes the temperature of the oil
as reference and when this reaches the threshold of
103° C (217° F), it star ts to reduce the power
available. On reaching 113° C (235° F), power is
reduced to 50%.
87519804 NA
ENGINE REPAIR MANUAL
CHAPTER 2 - 667TA ENGINE OVERHAUL
Issued 11-06 Bur
2-39