Chevrolet 1970 Owner's Manual page 85

.yst ems on your Chevrolet, and the service required
* Air Injector Reactor (AIR)
KEY TO AU. SYSTEM
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The Air Injection Reactor system, used on some vehicles, is
designed to reduce ail' pollution by oxidizing the h ydro-
carbons and carbon monoxide after they.leave the combus-
tion chamber. A positive displacement air pwnp, driven by
the engine, compresses filtered air which is injected at the
exhaust port of each cylinder. Th is air mixes with the ex-
haust gases and promotes further oxidation of both hydro -
carbons and carbon monoxide. The A IR system also
includes a special calibrated carburetor, distr ibutor and
related components. Complete effectiveness of the system
is dependent on proper mainten ance. See service recom-
mendations.
• B3
H OSE ·SO LENOID
ID CARBURETOR
ClEAN A IR
SWITC H
DIS TRIBUTOR HOSE.SOLENOID
TO C ARBURETOR
VACUUM
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TO D ISTRIBUTOR
S OLENOID
*Transmission Controlled Spark (TCS)
Transmission Controlled Spark is used on most vehicles,
to fu r ther reduce exhaust emissions by permitting vacuum
spark advance during high gear operation only. T CS
includes a solenoid which controls vacuum advance to the
d istributor in response to a signal for a switch operated
by the transmission . The system is designed to provide
the advantage of advanced spar k timing w hen it is most
needed. TCS requires n o regular service.
.Systems iHustrated on V - B engines, 6- cylinder systems similar .