Chapters Fuel Injection Equipment
1. Fuel Supply System
4LHA Seru
(4M2) Boost
compensator
(4)-(2)-(1)
Objective
of
compensator
The
boost compensator is a device mounted to the fuel
injection pump for engines equipped
with
a turbocharger.
The
amount of air sent from the intake manifold by the
linking function of the turbocharger increase in proportion
to the amount of fuel injected from the injection pump
(4LHA-DTE)
The boost compensator controls the
injection quantity by responding to changes in pressure.
(4)-(2H2)
Outline
of
structure
and
principle
of
operation
1 When the regulator handle is operated during abrupt ac-
celeration,
the control rack moves to the increase side as
far as A.
2
Increase of engine speed drive the turbocharger to in-
crease
boosting pressure. This boosting pressure pushes
the diaphram in the boost compensator, moving the
con-
trol
rack to the fuel increase side by means of the boost
compensator
lever.
Cold
start knob
/ Boost compensator \
\ cancel knob /
Engine
stop nob
at cold start when running
<$=>
F.O-increase
F.O-decreasi
Acceleration
adjusting screw
j "jT} iTi Tension adjust leve
Diaphragm Stop lever^
Adjust bolt
3-2-9
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