3
Eaton
Electro-hydraulic Fan Drive System E-SYFD-MROO1-E3 October 2008
Applications:
On-highway vehicles
• Buses
• Recreational vehicles
Construction machinery
• Excavators
• Loaders
• Cranes
• Forklifts
Agriculture machinery
• Tractors
• Forest machinery
Applications
and Benefits
Benefits of
Electronic Control
• Functions with Engine Con
-
trol Module Input or Vehicle
Sensor and Switch Inputs:
– Allows a wide variety of
configurations.
• Communications via RS
323 or CANbus link:
– Provides versatility in
communications.
• Conditions engine control
module signal:
– Filters noise, inverts sig-
nal, and re-scales signal
to optimize control.
• Uses closed-loop current
control, instead of voltage
control:
– Improves control
accuracy of fan speed by
eliminating temperature
effects on proportional
valve coil.
Buses
• Modulates fan speed
– Reduces operating power
and noise.
• Limits fan speed on start-up
– Reduces fan power draw
on start-up.
• Increased fuel economy
– Reduced fan power re
-
quirements lead to better
fuel economy.
Recreational Vehicles
• Ramps between fan speed
settings
– Ensures gentle speed
transitions and provides
smooth operation.
• Reduces operation noise
– Electronic control reduces
the noise of the fan and
pump, providing better
passenger comfort.
Wheel Loaders
• Encapsulated construction
– Allows installation in
more exposed locations
on the vehicle.
• Flexible installation
– The electronic control of
the Fan Drive System al-
lows flexible installations
for optimum fan location.
• Fan reverse feature
– Reverse fan operation fa
-
cilitates removal of debris
from the vehicle radiator.
application SpEcific BEnEfitS
