VARIABLE BOOST CONTROL (VBC) VALVE ACTUATOR CONSTRUCTION/OPERATION[MZ-CD 1.6 (Y6)]

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Construction

•  Consists of the body, rod, and diaphragm chamber spring.

Operation

•  Normally, the spring force presses against the rod, keeping the shutter valve open. When vacuum is applied to the diaphragm chamber from the vacuum chamber, the rod is pulled, closing the control valve.
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1
Normal status (depressurized)
2
Diaphragm chamber
3
Spring
4
Rod pushed
5
Vacuum applied
6
Vacuum applied
7
Rod pulled