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15.4 Catalyst converter system
15.4.1 Structure：
15.4.2 Description
1.The function of the converter catalyst is to convert HC, CO and NO
X
after incomplete combustion into
innocuous gas such as H
2O,CO2、 and N2 then discharge them out.
2. The converter catalyst contains rare metal like platinum and rhodium and only unleaded gasoline can be
used.
Note that leaded gasoline will invalidate the catalyst.
•Matters needing attention in overhaul of vehicles（vent pipes） loaded with catalyst converter:
1〉For Keep the vehicles loaded with catalyst converter away from inflammable materials. , the engine
is too hot to be touched shortly after it is started or stalled.
2〉Keep the vehicles loaded with catalyst converter away from inflammable materials.
3〉The vent pipe contains CO that does harm to health, therefore don't run the engine in enclosed space.
4〉The vehicle loaded with catalyst converter can not use leaded gasoline. （To guard against catalyst
poisoning
5〉do not start the engine by pushing the vehicle. If startup must be done by pushing, wait until the
temperature of engine and catalyst converter drops.
6〉Do not shift up or stall when descending.
7〉Do not drive vehicle with bad ignition.
8〉Do not repair the engine ignition system by dismantling the spark plug and starting the engine to inspect
whether the spark plug is sparkless. If such operation is necessary, it cannot be performed for a long time.
vent pipe
catalyst converter
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