Exhaust gas purifying system for internal combustion engine
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United States of America Patent
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Aug 24, 1982
Grant Date -
N/A
app pub date -
Jul 16, 1980
filing date -
Jul 16, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An exhaust gas purifying system for an automobile engine including at least first and second engine cylinder has a shutter valve for interrupting the supply of a combustible air-fuel mixture to the first engine cylinder during a particular engine operating condition, a three-way electromagnetically operated valve for controlling the operation of the shutter valve, and a secondary air supply unit including a switching valve for selectively supplying a secondary air to a portion of an exhaust passage upstream of at least one catalyst unit disposed in the exhaust passage.
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