SSANGYONG Rexton 2004 Service Manual page 1089

MANUAL AIR CONDITIONING SYSTEM
GENERAL INFORMATION
FUNCTION DESCRIPTION
Compressor
All compressor are belt-driven from the engine crankshaft
through the compressor clutch pulley. The compressor pul-
ley rotates without driving the compressor shaft until an
electromagnetic clutch coil is energized. When voltage is
applied to energize the clutch coil, the clutch plate and
hub assembly is drawn rearward toward the pulley. The
magnetic force locks the clutch plate and pulley together
as one unit to drive the compressor shaft.
As the compressor shaft driven, it compresses the low pres-
sure refrigerant vapor from evaporator into high pressure,
high temperature vapor. The refrigerant oil that is used to
lubricate the compressor is carried with the refrigerant.
Magnetic Clutch
The magnetic clutch is assembled in front of the com-
pressor and controls to stop or operate the compressor.
The center piece is inserted to the compressor crankshaft
and rotate the only the pulley when it doesn't operate the
compressor. When the A/C switch is turned ON, the cur-
rent flows into the wrapped coil of the stator and the stator
is converted to the powerful electromagnet. Therefore, the
compressor can rotate with the pulley together because
the stator can pull the center piece tightly.
V-5 Compressor-General
Description
Vehicle using the V5 compressor may have differences
between installations in the mounting brackets, the drive
system, the pulleys, the connections and the system ca-
pacities. Basic overhaul procedures are similar between
the compressors used on different vehicles.
When serving the compressor, keep dirt and foreign mate-
rial from getting on or into the compressor parts and the
system. Clean tools and a clean work area are important
for proper service. The compressor connections and out-
side of the compressor should be cleaned before perfor-
mance of any on-vehicle repairs and before removal of the
compressor. The parts must be kept clean at all times
and any parts that are to be reassembled should be cleaned
with trichloroethane, naphtha, stoddard solvent, kerosene
A/C SYSTEM
REXTON SM - 2004.4
or equivalent solvents and dried with dry air. Use only lint-
free cloths to wipe the parts.
The operations described are based on bench overhaul
with the compressor removed from the vehicle, except as
noted. They have been prepared in the order of accessibil-
ity of the components. When a compressor is removed
from the vehicle for servicing, the amount of oil remaining
the compressor should be drained, measured and recorded.
This should then be discarded and new polyalkaline gly-
col (PAG) refrigerant oil added to the compressor.
Note
The oil drain plug must be removed and the oil drained
through the plug opening to insure complete draining
of oil from the compressor.
V-5 Compressor-Operation
The V5 is a variable displacement compressor that can
match the automotive air conditioning demand under all
conditions without cycling. The basic compressor mecha-
nism is a variable angle wobble-plate with seven axially
oriented cylinders. The center of the control of the com-
pressor displacement is a billows-actuated control valve
located in the rear head of the compressor that senses
compressor suction pressure.
The wobble-plate angle and the compressor displacement
are controlled by the crankcase suction pressure
differential. When the A/C capacity demand is high, the
suction pressure will be above the control point. The valve
will maintain a bleed from crankcase to suction. With no
crankcase suction pressure differential, the compressor
will have maximum displacement.
When the A/C capacity demand is lower and the suction
pressure reaches the control point, the valve will bleed
discharge gas in the crankcase and close off a passage
from the crankcase to suction plenum. The angle of the
wobble-plate is controlled by a force balance of seven
pistons. A slight elevation of the crankcase suction pres-
sure differential creates total force on the piston resulting
in a movement about the wobble-plate pivot pin that re-
duces the plate angle.
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