Honda CR-V: Exhaust Emissions Controls
The exhaust emissions controls
include three systems: PGM-FI,
ignition timing control, and three
way catalytic converter. These three
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
powertrain control module (PCM)
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.
ThreeWay 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 (CO2), nitrogen
(N2), and water vapor.
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The emissions control systems are
designed and certified to work together
in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you shoul
The three way catalytic converter
contains precious metals that serve
as catalysts, promoting chemical
reactions to convert the exhaust
gasses without affecting the metals.
The catalytic conv
Testing of Readiness Codes
If you take your vehicle for an
emissions test shortly after the
battery has been disconnected or
gone dead, it may not pass the test.
This is because of certain ‘
SEE MORE:
The National Highway Traffic Safety
Administration and Transport
Canada recommend that all children
aged 12 and under be properly
restrained in a back seat.
If the passenger’s front airbag
inflates in a moderate to severe
frontal collision, the airbag can cause
serious injuries to a
When a disc is not being played,
store it in its case to protect it from
dust and other contamination. To
prevent warpage, keep discs out of
direct sunlight and extreme heat.
To clean a disc, use a clean soft cloth.
Wipe across the disc from the center
to the outside edge.
A new disc ma
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