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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.:

US 10890090 B1

PDFFull Text
Date of Patent:
Jan. 12, 2021

Filed:

Dec. 07, 2018

Engine

Applicant:

Kubota Corporation, Osaka, JP;

Inventors:

Katsushi Inoue, Sakai, JP;

Hiroaki Okano, Sakai, JP;

Masanori Fujiwara, Sakai, JP;

Assignee:

KUBOTA CORPORATION, Osaka, JP;

Attorney:

Panitch Schwarze Belisario & Nadel LLP

Primary Examiner:

Anthony Ayala Delgado

Int. Cl.
CPC ...
F01N 3/023 (2006.01); F01N 3/025 (2006.01); F01N 3/035 (2006.01); F02D 41/02 (2006.01); F02D 43/00 (2006.01); F02D 9/04 (2006.01); F01P 3/20 (2006.01); F01N 9/00 (2006.01); F01N 11/00 (2006.01);
U.S. Cl.
CPC ...
F01N 3/0235 (2013.01); F01N 3/0253 (2013.01); F01N 3/035 (2013.01); F01N 9/002 (2013.01); F01N 11/002 (2013.01); F02D 9/04 (2013.01); F02D 41/025 (2013.01); F02D 41/029 (2013.01); F02D 43/00 (2013.01); F01N 2240/36 (2013.01); F01N 2430/06 (2013.01); F01N 2560/06 (2013.01); F01N 2900/0416 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/1602 (2013.01); F01N 2900/1626 (2013.01); F01P 3/20 (2013.01); F01P 2060/00 (2013.01); F02D 2200/0802 (2013.01);
Abstract

An engine promoting DPF regeneration processing is provided. Catalyst activation processing and thereafter DPF regeneration processing are performed under control of a device. In the catalyst activation processing, a target temperature of exhaust at an exhaust exit of a catalyst is set to be in a first temperature region, and then the opening degree of an exhaust throttle device is controlled. In the DPF regeneration processing, the target temperature is set to be in a second temperature region. A target temperature of the exhaust at an exhaust inlet of a DPF is set to be in a third temperature region. The opening degree of the exhaust throttle device is controlled, and unburned fuel is supplied into the exhaust. The temperature regions are set to be successively higher, and a temperature difference between successive temperature regions is set to be successively lower.

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