Operation Of Governor - Ezgo 1600xd Repair Manual

3.5.3 OPERATION OF GOVERNOR

A. WHEN STOPPED
The fuel is blocked since the solenoid (3) pushes the
speed control rack (4) to the left.
B. WHEN TURNING THE KEY SWITCH ON
When the electromagnet in the stop solenoid operates
and the pin is retracted, the speed rack (4) of the fuel
injection pump is pushed to the right by the start spring
(9) and the start shaft (10) to supply the sufficient
amount of fuel to start the engine.
C. WHEN STARTING THE ENGINE AND RUNNING
THE ENGINE AT LOW IDLE SPEED
When the engine is started, the steel ball (6) pushes
the sleeve (11) to the left as the centrifugal force of the
steel ball increases. Therefore, the governor fork lever
1 (13) pushes the speed rack (4) of the pump to the
left to reduce the amount of fuel supplied.
As the speed rack is stopped by the idle spring (8),
it keeps the balance with the centrifugal force of the
steel ball so that at least minimum amount of fuel is
delivered for stable engine running at idle speed.
D. ACCELERATION AND DECELERATION
When depressing the accelerator pedal, the governor
spring (1) pulls the fork lever 2 (12) to the right and
then pushes the fork lever 1 (13) to the right. The fork
lever (13) is stopped by the sleeve (11).
When the centrifugal force of the steel ball (6) that is
proportional to the engine speed is balanced with the
tension of the governor spring (1) that is determined by
the driver, the stable speed is maintained.
SUUV-W00 Apr. 2011
ENGINE - STRUCTURE AND FUNCTION
E. LOAD INCREASE AT HIGH SPEED
When a load is applied to the engine running at a high
speed, the centrifugal force of steel ball (6) decreases
as the engine speed drops. Also, the fork lever 2 (12) is
pulled to the right by the governor spring until it contacts
the fuel limit bolt (14). Until then, the amount of injected
fuel per one stroke of the injector plunger and the torque
increase.
This range (a) is between the max. speed point with no
load and the max. power point of the torque curve.
When the fork lever 2 is blocked by the fuel limit bolt (14)
and does not move any more and the load is increased,
the centrifugal force of steel ball drops further and the
torque spring (15) compressed between the fork lever 1
and 2 is loosened. Then, the fork lever 2 moves to the
right until the torque spring is free, and the amount of fuel
supplied and the torque increase simultaneously.
This range (b) is between the max. power and the max.
torque point in the torque curve.
•
F. WHEN STOPPED
When the key switch is moved to the "OFF" position, the
stop solenoid power is cut off to release the electromag-
net. Therefore, the stop pin comes off by the return force
of the spring and pushes the solenoid guide (2) and fuel
injection pump rack to the stop position to stop the en-
gine.
IMPORTANT
The fuel limit bolt (14), idle spring (9) and max.
rpm setting bolt are set at factory. Unauthorized
adjustment of such components can negatively
effect the performance of the engine. Therefore,
never adjust them without permission from
DAEDONG. Such action violates the EPA
regulation and also can void the warranty.
Torque Curve
T46W247B
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