Engine exhaust gas purification device

Details Engine exhaust gas purification device Engine exhaust gas purification device

2006-12-12

2006-12-12

Greene, Jason M. (Department: 1724)

Gas separation: processes

Filtering

C095S001000, C095S019000, C095S278000, C055S282200, C055S282300, C055S283000, C055S385300, C055S523000, C055SDIG010, C055SDIG030, C096S417000, C096S421000, C060S311000

Reexamination Certificate

active

07147693

ABSTRACT:
An engine exhaust gas purification device is disclosed. The purification device has a filter (13) which traps particulate matter contained in the exhaust gas from an engine; a differential pressure detection sensor (16) which detects a differential pressure of the filter; a sensor (14, 15, 21, 31, 33) which detects an engine running state, and a microcomputer (22). The microcomputer (22) is programmed to compute an estimated ash amount ASH_a of the filter based on the detected differential pressure; compute an oil consumption amount OC_total based on the detected engine running state; compute an ash density DENS_ASH from the oil consumption amount OC_total and estimated ash amount ASH_a, and compute an ash amount ASH of the filter based on the oil consumption amount OC_total and ash density DENS_ASH.

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