GMC chevrolet camaro 2000 Service Manual page 192

HVAC Heating, Ventilation and Air Conditioning 1-95
The V5 compressor is a variable displacement
compressor that can match the automotive air
conditioning demand under all conditions without
cycling. The basic compressor mechanism is a variable
angle wobble-plate with five axially oriented cylinders. A
bellows actuated control valve located in the rear head
of the compressor senses the compressor suction
pressure and is the center of control for the compressor
displacement. The crankshaft-suction differential
controls both the wobble-plate an.d the control
displacement. When the A/C capacity demand is high,
the suction which causes no crankcase-suction
pressure differential giving the compressor maximum
displacement. When the A/C capacity demand is lower
Compressor Description (5. 7. l)
and the suction pressure reaches the control point, the
valve will bleed discharge gas into the crankcase and
close off a passage from the crankcase to the suction
plenum. The wobble-plate angle is controlled by a force
balance on the five pistons. A slight increase in the
wobble-plate pivot pin that reduces the plate angle.
The compressor has a unique lubrication system. The
crankcase-suction bleed is routed through the
rotating wobble-plate for lubrication of the wobble-plate
bearing. The rotation acts as an oil separator,
removing some of the oil from the crankcase-suction
bleed, and rerouting the oil to the crankcase where the
oil can be lubricate the compressor mechanism.
V7 Compressor Components
11
9
I
y13
I
8
157241
Legend
(1) Shaft Nut (3) Clutch Plate and Hub
(2) Clutch Hub Key (4) Clutch Rotor and Bearing Snap Ring