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HVAC
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engine is passed through a winding tube of the core,
a heat exchanger between coolant and cabin air.
Fins attached to the core tubes serve to increase
surface for heat transfer to air that is forced past
them, by a fan, thereby heating the passenger com-
partment.
8. COMPRESSOR
SPECIFICATION
MODEL
SD6V12
NO. OF CYLINDER
10
DISPLACEMENT VOLUME
125.1 cm
3
/ rev
.
MINIMUM DISPLACE-
MENT
7.5 cm
3
/ rev
.
LUBRICANT
SP10
OIL QUANTITY
Petrol - 120ml
Diesel - 100ml
REFRIGERANT
R134a
The Compressor used in the vehicle is variable dis-
placement type.
This compressor has two identical scrolls arranged
at 180º around a offset center; one of them is fixed
(fixed scroll) and the other (orbit scroll) is turned at a
constant attitude, so that the space made between
the scrolls symmetrically around the rotating shaft
moves from outside toward the center while reducing
its volume; this is the principle of compression.