Exhaust emission control apparatus for a general-purpose interna

Details Exhaust emission control apparatus for a general-purpose interna Exhaust emission control apparatus for a general-purpose interna

1998-08-06

1999-11-16

Ryznic, John E.

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

F01N 332

Patent

active

059836326

ABSTRACT:
An exhaust emission control apparatus for a general-purpose internal combustion engine comprises an exhaust passage allowing passage of an exhaust gas therethrough and having a ternary catalyst, and an air pump for supplying a secondary air to the exhaust passage. The air pump is driven by rotation of a camshaft having a cam for opening and closing an exhaust or intake valve of the internal combustion engine. The drive of the air pump is effected by a pump rocker arm disposed between the cam and a pump shaft of the air pump.

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