The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2006
Filed:
Apr. 06, 2004
Takao Inoue, Yokohama, JP;
Junichi Kawashima, Yokosuka, JP;
Naoya Tsutsumoto, Yokohama, JP;
Makoto Otake, Yokohama, JP;
Terunori Kondou, Yokohama, JP;
Toshimasa Koga, Yokohama, JP;
Takao Inoue, Yokohama, JP;
Junichi Kawashima, Yokosuka, JP;
Naoya Tsutsumoto, Yokohama, JP;
Makoto Otake, Yokohama, JP;
Terunori Kondou, Yokohama, JP;
Toshimasa Koga, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An engine exhaust gas purification device is disclosed. The purification device has a filter () which traps particulate matter contained in the exhaust gas from an engine; a differential pressure detection sensor () which detects a differential pressure of the filter; a sensor () which detects an engine running state, and a microcomputer (). The microcomputer () 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.