Sym Citycom 300i - Emission Control System

18. Emission Control System
18-1
Emission Control System Classification
€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ 18-1
Emission Control System Description
€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ 18-1
Evaporative Emission Control System
(E.E.C.) €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€ 18-2
Catalytic Converter (CATA) €€€€€€€€€€€€€€€€ 18-4
Positive Crankcase Ventilation System
(P.C.V.) €€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€18-5
Inspection Items€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€18-6
Countermeasure for Abnormal Emission
Pollutants€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€€18-7
Emission Control System Classification
1. Evaporative Emission Control System (E.E.C.)
2. Catalytic Converter (CATCON.)
3. Positive Crankcase Ventilation System (P.C.V.)
Emission Control System Description
System Device Components Purpose & function
Combustion
chamber
Combustion
chamber
4-valve combustion
chamber
The semi-circular combustion chamber is
designed to balancing the air stream to
achieve the combustion stability.
Exhaust
system
Post-treatment
device
Catalytic converter
Installed a three-
way catalytic converter in
the middle of exhaust pipe to oxidize the
CO, HC in the exhaust gas.
E.E.C. system
Evaporative
emission control
system
Activated-carbon canister
Purge control valve
A canister is used to absorb vapor from
fuel tank and to introduce it
into the intake
manifold at an opportune timing.
P.C.V. system
Crankcase blow-by
gas introducing
device
Vapor separator
To introduce blow-by gas
into combustion
chamber via a vapor separator for
burning.
18
Home page
Contents