Yanmar 4LHA-HTP Operation Manual page 390

Chapter 3 Fuel Injection Equipment
6. Governing Mechanism
Idling operation
Flyweight
A
KJ
Fig. 39 Operation of governor equipped with negative torque control device: idling operation
On starting, the centrifugal force of the
flyweights causes the governor sleeve to move
to the right (Fig. 39). The governor sleeve then
contacts and moves the torque control lever.
The torque control lever pushrod then contacts
the tension lever at point A, and the torque
control lever then pivots around point A to
1
1
Governor sleeve
Starting lever
Torque control lever
Control sleeve
compress the start-idling spring until its set
force is overcome by the flyweights' centrifu-
gal force. Consequently the starting lever will
pivot clockwise around M2, thus moving the
control sleeve in the fuel decrease direction un-
til an injection quantity suitable for idling is
attained.
3-1-33
i 4LHA Series
Start-idling spring
Tension lever
Pushrod