Yanmar 4LHA-HTP Operation Manual page 436

Chapter 3 Fuel Injection Equipment
1. Fuel Supply System
E
å
tr.
s
The torque spring thus provides for increasing
injection volume as the speed falls. This increases
the engine torque and in turn prevents engine stop-
ping due to sudden increases in load. This also
contributes to strong engine output characteristics.
(7) No-load maximum speed
When the load decreases from full load max. speed
and engine speed increases, the increased thrust
load of the governor weight acting on the governor
spring through the tension lever exceeds the set
load of the spring. The tension lever and governor
lever descend clockwise; the control rack is pushed
to the no-load injection volume position ( R H ) and
the engine is operated at no-load max. speed.
When the engine is being used at a partial load, the
governor spring functions in the same way at a
lower speed (i, i"-j)
(because the governor spring set load is also
smaller).
G (Continuous
rated output)
Cam speed
Engine speed -
as for full load max. speed,
Control lever position
Rated speed setting
Control lever position--
-
at partial load (point H)
Full load stopper'
Tension lever
Angleich spring
" 1
E
E
cc
Rated rack set position
3
No load rack position
(8) Stopping the engine
The engine stops when you t u r n the governor con-
trol lever all the way to stop.
O n engines equipped with a s t o p device, the engine
can be stopped by moving the control rack to the
stop position, regardless of the control lever posi-
t i o n .
3-2-14
-j
I ' .
^ f
/
Governor lever
(with angleich spring)
» i
Cam speed n c rpm
4LHA Series
RE
- R G
Injection volume
Increase Decrease