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:
Aug. 14, 2007
Filed:
Mar. 03, 2005
Makoto Saitoh, Okazaki, JP;
Shigeto Yahata, Obu, JP;
Kazuharu Tochikawa, Kariya, JP;
DENSO Corporation, Kariya, JP;
Abstract
An electronic control unit (ECU) of an internal combustion engine calculates a present deposition quantity of exhaust particulate matters based on operating states of the engine such as a differential pressure of a diesel particulate filter (DPF). If the present deposition quantity exceeds a predetermined upper limit value, the ECU performs compulsory regeneration of the DPF to compulsorily combust and reduce the deposited exhaust particulate matters. The ECU determines that spontaneous regeneration occurs if a temperature of exhaust gas in the DPF is equal to or higher than a reference temperature. Thereafter, the ECU completes the compulsory regeneration to eliminate the deposited exhaust particulate matters if the ECU determines that the spontaneous regeneration stops and the deposition quantity becomes equal to or less than a predetermined lower limit value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile