Exhaust gas purifying device for internal combustion engine
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United States of America Patent
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-
May 4, 1993
Grant Date -
N/A
app pub date -
May 30, 1991
filing date -
Jun 1, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An exhaust gas purifying device which is provided with catalytic converter and a fuel injector which are disposed upstream of a particulate matter trap. The fuel injection injects fuel to the catalytic converter to rise exhaust gas temperature by its oxidation reaction heat when the exhaust gas temperature is slightly lower than a predetermined regeneration temperature. Further, a closable bypass passage is communicated with the passage between the catalytic converter and the trap and functions to allow to bypass exhaust gases in accordance with the trap condition and the exhaust gas temperature.
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