Honda Accord 2008 Manual page 363

07/11/02 09:01:21 61TA0000_110_0044
Fuel and Emissions Systems
System Description (cont'd)
Catalytic Converter System
Warm Up Three Way Catalytic Converter (WU-TWC)
and Three Way Catalytic Converter (TWC)
The WU-TWC/TWC converts hydrocarbons (HC), carbon
monoxide (CO), and oxides of nitrogen (NOx) in the
exhaust gas to carbon dioxide (CO ), nitrogen (N ), and
water vapor.
WU-TWC (ATTACHED TO THE CYLINDER HEAD)
＊３８
HOUSING
TWC (UNDER THE FLOOR)
＊３９
FRONT OF
VEHICLE
11-44
2 2
WARM UP
THREE WAY
CATALYST
HOUSING
UNDER-FLOOR
THREE WAY
CATALYST
Positive Crankcase Ventilation (PCV) System
The PCV valve prevents blow-by gasses from escaping
into the atmosphere by venting them into the intake
manifold.
INTAKE
MANIFOLD
PCV HOSE
: BLOW-BY VAPOR
: FRESH AIR
BREATHER
PIPE
PCV VALVE
＊４０