Secondary air feed device of an engine
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United States of America Patent
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-
Aug 17, 1993
Grant Date -
N/A
app pub date -
Jul 23, 1992
filing date -
Aug 7, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A secondary air feeding device comprising an air pump for feeding secondary air into the exhaust passage upstream of the three way catalytic converter. The air-fuel ratio is normally maintained at the stoichiometric air-fuel ratio by a feedback control. When the amount of fuel is to be increased, the feedback control is stopped, and the supply of secondary air is started. At this time, the amount of secondary air is basically calculated from the amount of fuel fed into the engine.
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