Exhaust particle removing system for an internal combustion engine
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United States of America Patent
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-
Sep 9, 1986
Grant Date -
N/A
app pub date -
Sep 18, 1984
filing date -
Sep 26, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filter is disposed in the exhaust passage of an internal combustion engine in order to trap particles suspended in exhaust gas. A burner serves to burn off the particles deposited on the filter. Either the pressure in the exhaust passage at a point upstream of the filter or the pressure difference in the exhaust passage across the filter is selectively sensed. In place of sensing the pressure difference, the pressure in the exhaust passage at a point downstream of the filter may be sensed. The ratio between the upstream pressure and the pressure difference, or the ratio between the upstream pressure and downstream pressure is determined an as indication of the degree of clogging of the filter. The burner is operated on the basis of this ratio.
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