Kubota WG1903-E3 - Exhaust System; Three-Way Catalyst

ENGINE
WG1903-E3, WG2503-E3, WSM
1-M19
5. EXHAUST SYSTEM
[1] THREE-WAY CATALYST
A three-way catalyst is a catalyst that oxidizes HC to
CO
2
and H
2
O and also CO to CO
2
respectively and at the
same time reduces NOx to N
2
near the stoichiometric
ratio.
The main basic component of an exhaust gas
purification system that uses a three-way catalyst is
feedback control of air-fuel ratio by means of an oxygen
sensor for the purpose of maximizing the emission
purification efficiency characteristic with reference to the
intake air-fuel ratio of the three-way catalyst.
KUBOTA engines have two kinds of catalytic
devices, catalytic muffler and catalytic converter.
9Y1210914ENM0061US0
(1) Catalytic Muffler (2) Catalytic Converter
KiSC issued 05, 2019 A