Figure 5
2.
Control Function
•
Exhaust pressure P1 and P2 are determined by
movement of tilting plate and piston.
•
Spring
works
pressure.
•
The set load of spring A (outer spring) decreases
and tilting plate becomes fixed at maximum tilt
position, when hydraulic pressure is applied to
piston.
•
The tilting plate begins to incline when hydraulic
pressure is applied to piston and spring A exceeds
its set load, and keeps its tilting face at point where
hydraulic pressure is in equilibrium with strength of
spring. (Refer to "A" in middle part of Figure 6).
•
Tilt angle begins to decrease when hydraulic
pressure is applied to piston, and then spring B that
so far has not worked begins to operate.
•
The two springs become to revive their spring
tension when hydraulic pressure reaches highest
lower tilting point. (Refer to (A + B) domain in middle
part of Figure 6).
•
The control changeover curve begins to change
when hydraulic pressure P3 that presses piston is
applied.
Main Pump
Page 12
in
direction
against
discharge
SP001488