19
AIR CONDITIONING
VACUUM SOLENOID VALVE (VSV)
Engine idling speed raising device is provided to
enable cooler operation in a heavy traffic area.
The VSV (vacuum solenoid valve) is a component
part of this device. Construction of VSV is shown in
Fig. on the right.
Operation
When switching off the air conditioner, theVSV opens
to atmosphere side by compression spring.
l
F. I. P. lever allows it to return to the idle position.
l
When switching on the air conditioner,-current
flows into the coil, and the VSV opens to vacuum
source by magnetic force.
Thus, the vacuum will act on the diaphragm of
actuator installed on F. I. P.
l
With the help of actuator the accelerator lever is
pushed to get higher idling rpm.
COMPRESSION
SPRING
FILTER
COIL
MOVING
CORE
WHEN NOT OPERATING AIR CONDI-
TIONER
TO VACUUM
TANK
VSV
ATMOSPHERE
MAGNETIC
CLUTCH
DIAPHRAGM
(VACUUM)
WHEN OPERATING AIR CONDITIONER
TO VACUUM
TANK
VSV
ATMOSPHERE
MAGNETIC
CLUTCH
DIAPHRAGM
(VACUUM)
Fig. 19
Fig. 20
Fig. 21




