isochronous operation:
depressing push button HOLD/RESET makes the LED light up and the governor keep the
r.p.m. rigorously constant.
operation with statism:
if the HOLD/RESET push button is pressed again the LED is switched off and the governor
operates with a r.p.m. droop of about 7% from idling to full-load speed. This engine running mode is useful when
driving tractor on public roads.
fixed-speed hand control:
this helps reproduce the hand throttle control.
Fig. 28 - Protection against electronic governor
actual access.
functions:
— isochronous operating mode;
— speed statism operating mode;
— 600 to 2700 RPM speed adjustment;
— hand throttle digital control;
— idling speed under variable statism of 600 to 1500 r.p.m.;
— speed under variable isochronous operating mode
from previous idling speed to 2500 r.p.m.;
— limitation of the peak horsepower varying with the speed;
— protection operation and fault self-diagnosis.
protections:
— pick-up signal loss protection;
— actuator terminal short-circuit protection;
— overspeed protection;
— battery polarity reversal protection;
— power supply loss protection;
— microprocessor fault protection.
Installing components
The installation of the various components should be carried out
with battery disconnected.
— the positive of the key subsequently supplying power to the card
is directed towards battery +.
— the card power supply in-series fuse is 7.5 A.
Note: the metal box housing the card is connected to battery
negative through a card-internal connection.
Fig. 29 - Views of the electronic governor actuator.
engine
fuel system
16
1
66
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