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Exhaust
Emissions
Controls
The
exhaust emissions controls
include four systems:
PGM-FI,
Ignition Timing Control, Secondary
Air Injection System and
Three
Way
Catalytic Converter.
These
four
systems work together to control the
engine's combustion and minimize
the amount of
HC,
CO,
and NOx that
comes out the tailpipe.
The
exhaust
emissions control systems are
separate from the crankcase and
evaporative emissions control
systems.
PGM-FI
System
The
PGM-FI System uses sequential
multiport fuel injection.
It
has three subsystems: Air Intake,
Engine
Control, and Fuel Control.
The
Engine Control Module (ECM)
uses various sensors to determine
how much air is going into the
engine.
It
then controls how much
fuel to inject under all operating
conditions.
Ignition
Timing
Control
System
This system constantly adjusts the
ignition timing, reducing the amount
of
HC,
CO
and NOx produced.
Secondazy
Air
Injection
System
During engine warm-up, air is
pumped into the exhaust to reduce
emissions when
the
engine is cold.
Three
Way
Catalytic Converter
The
three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts
HC,
CO,
and NOx in the engine's exhaust
to carbon dioxide
(COz),
dinitrogen
(Nz),
and water vapor.
Emissions Controls
Replacement
Parts
The
emissions control systems are
designed and certified to work
to-
gether
in
reducing emissions to
levels that comply with the
Clean Air
Act. To make sure the emissions
remain
low,
you should use only new
Genuine Honda replacement parts or
their equivalent for repairs. Using
lower quality parts may increase the
emissions from your car.
The
emissions control systems are
covered by warranties separate from
the rest of your car. Read your
warranty manual for more informa-
tion.
Technical
Information
251
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