FUEL SYSTEM
Fuel Injection Pump / Governor / Timer
6-10 6LY3 Service Manual
© 2007 Yanmar Marine International
Governor Components and
Functions
The electronic governor controls fuel injection
quantity and engine speed electronically. The rack
position sensor and governor solenoid are built into
the governor (Figure 6-4, (6)).
The rack position sensor is linked to the control
rack (Figure 6-4, (3)) and detects the rack position.
The governor solenoid is linked to the control rack
and actuates it according to the rack position which
is calculated by the ECU (Electronic Control Unit).
This governor has a function of iso-chronous
control. Actual engine speed is feedback-controlled
to the target speed (throttle position). Engine speed
varies directly with throttle position.
Figure 6-4
Figure 6-4
1 – Fuel Decrease
2 – Fuel Increase
3 – Control Rack
4–Timer
5 – Fuel Injection Pump
6 – Governor
7 – Rack Position Sensor
8 – Governor Solenoid (Rack Actuator)
(8)
(6)
(5)
(1) (2)
(4)
(3)
(7)
0005667
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