A
cam connected to the throttle mechanism, applies pressure to the end of the aneroid. For
example, as the throttle is opened, the
cam
rotates, applying pressure to the aneroid,
increasing the amount of upper deck pressure necessary to open the oil restrictor. When the
throttle is closed. The opposite occurs. In this manner, upper deck pressure will increase or
decrease in a direct relationship to the throttle angle.
With the variable absolute pressure controller, upper deck pressure is maintained at ap-
proximately one to two inches above manifold pressure. Maintaining this relatively low
differential between manifold and upper deck pressures reduces the load on the turbocharger
and throttle valve.
NOTE.
.
.
Controllers are not field serviceable and should be replaced when found to be
malfunctioning.
FROM
WASTEGAT
FIGURE
81-30-04.
VARIABLE ABSOLUTE
PRESSURE CONTROLLER.
FIGURE
81-30-05.
THROTTLE CONNECTION.
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