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:
Apr. 24, 2012
Filed:
Apr. 29, 2010
Isamu Kanaya, Ageo, JP;
Takayuki Adachi, Ageo, JP;
Nobuhiko Masaki, Ageo, JP;
Kiminobu Hirata, Ageo, JP;
Jin Kusaka, Tokyo, JP;
Keishi Takada, Tokyo, JP;
Takeshi Mende, Tokyo, JP;
Fumiyuki Tsurumi, Sagamihara, JP;
Isamu Kanaya, Ageo, JP;
Takayuki Adachi, Ageo, JP;
Nobuhiko Masaki, Ageo, JP;
Kiminobu Hirata, Ageo, JP;
Jin Kusaka, Tokyo, JP;
Keishi Takada, Tokyo, JP;
Takeshi Mende, Tokyo, JP;
Fumiyuki Tsurumi, Sagamihara, JP;
UD Trucks Corporation, Ageo-Shi, JP;
Waseda University, Tokyo, JP;
Tokyo Roki Co., Ltd., Yokohama-shi, JP;
Abstract
An exhaust gas pressure P, exhaust gas temperatures Tand Ton upstream and downstream of a DPF, a rotation speed Ne, a load Q, and an intake flow rate F as various operating conditions are read, and an amount of PM generated for short time Δt is obtained to be added to a PM deposited amount m, and thus, to obtain an initial deposited amount. Exhaust gas properties and a space velocity SV are obtained based on various operating conditions, and the PM deposited amount m after a lapse of the short time Δt is estimated from a PM deposited amount estimation equation 'm=m·exp(−B·Δt)' having been derived considering the exhaust gas properties and the space velocity SV. When the PM deposited amount m is equal to or more than a predetermined value, a forced regeneration processing in the DPF is executed, and thereafter, the PM deposited amount m is reset to 0.