Catalytic Converter System Outline [Lf]; Feature; Catalytic Converter System Structure [Lf]; Catalytic Converter System Operation [Lf] - Mazda 2006 MX-5 Service Highlights

CATALYTIC CONVERTER SYSTEM OUTLINE [LF]

Feature

• Purifies contaminants in the exhaust gas by utilizing a chemical reaction in a three way catalytic converter.
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CATALYTIC CONVERTER SYSTEM STRUCTURE [LF]

• Consists of a three way catalytic converter and insulator.
• The WU-TWC utilizing a platinum-rhodium-palladium system has been adopted.
• The TWC utilizing a platinum-rhodium system has been adopted.
System diagram
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CATALYTIC CONVERTER SYSTEM OPERATION [LF]

• Contaminants in the exhaust gas (HC, CO, NO
through the catalytic converter.
— Oxidization process
• Noxious HC (hydrocarbon) and CO (carbon monoxide) are bonded to oxygen which is converted to
non-noxious carbon dioxide and water.
+ HC + CO → CO
O
2
— Deoxidization process
• Noxious NO
(nitrogen oxide) is converted to non-noxious nitrogen and oxygen. A part of the oxygen
X
generated at this time is used in the oxidization process.
→ N
NO + O
X 2
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EMISSION SYSTEM
WU-TWC
TWC
) are purified by oxidization and deoxidization while passing
X
+ H O
2 2
2
E5U011600050N01
E5U011600050N02
01–16
E5U116ZS5852
E5U011600050N03
01–16–5