Saab 900 1983 - Emission Control Systems; I. The Crankcase Emission Control System

EMISSION CONTROL SYSTEMS
The 1983 Saab has three distinct systems for
controlling emissions to the atmosphere. The
sections that follow briefly describe these sys·
tems.
I. The Crankcase Emission Control System
II. The Evaporative Emission Control System
III. The Exhaust Emission Control System
Engine Families
1983 Saabs Imported to the United States are
divided
Into two engine families (normally as·
pirated and turbocharged) that meet the emis·
slon control standards indicated below. The
engine
family and appropriate tune·up speclfl·
cations are identified on a label affixed to the
left front inner fender.
DSA2.0V6FNT4
Normally·Asplrated
DSA2.0V6FTA9 Turbo
Both
families meet U.S.A. Federal Standards
and
California State Standards and are
equipped
with the following systems to ensure
compliance with the applicab le standards:
A. Continuous Injection System
B. Decel Dashpot (automatic transmission)
C. Decel Fuel shut off (manual transmission )
D. Lambda Control System
E. Three·way Catalyst
I. CRANKCASE EMISSION
CONTROL SYSTEM
A comple tely closed crankcase ventilation sys·
tem Is used. Crankcase fumes are drawn
dir ectly into the inlet manifold under all operat·
Ing
conditions except full load and high blow·by
when some gases are diverted ahead of the
throttle body. (On Turbo models all crankcase
gases are
diverted ahead of the throttle body).
The
011 separator in the valve cover also serves
as a
flame arrestor.
4 5 6 10
7
1. Crankcase
2. Exhaust Manifold
7. Inlet Manifold
3. Camshaft Cover
8. Air cleaner adapter
4
Oil trap and flame arrestor
9. Decel sole
no id valve
8
5 G 003
5. Nipple with orifice
6. Hose (normally aspirated)
10. Hose routed to air filter adapter (turbo) or
throttle housing (normally·asplrated).
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