Exhaust gas purification device of internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 11, 2003
Grant Date -
Oct 31, 2002
app pub date -
Nov 16, 2001
filing date -
Mar 29, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A particulate filter (22) is arranged in an exhaust passage of an engine, while an exhaust throttle valve (45) is arranged in the exhaust passage downstream of the particulate filter (22). The exhaust throttle valve (45) is fully closed once, then fully opened cyclically. At that time, the flow velocity of the exhaust gas is increased for just an instant in a pulse-like manner, whereby masses of particulate are separated from the particulate filter 22 and discharged.
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