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Patent Searching and Data


Title:
FILTER CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2004/016914
Kind Code:
A1
Abstract:
In order to estimate the deposition quantity of particulates in a first filter (61) or a second filter (62), a first estimating section (100) outputting first estimation data (XA) based on the differential pressure across the filter, and a second estimating section (110) outputting second estimation data (XB) based on the operating state of an engine are provided. A decision is made whether the filter must be regenerated or not by selecting one of the first estimation data (XA) or the second estimation data (XB) having a higher reliability in view of the rotation of the engine (2) at that time. Alternatively, difference between the first and second estimation data (XA, XB) is also taken into account and when the difference is larger than a specified level, selection of the first estimation data (XA) is prohibited because it may have a low reliability due to cracking of deposited particulates even if the rotational speed of the engine (2) is high.

Inventors:
Hamahata, Toshihiro c/o Bosch Automotive Systems (Corporation 13-26, Yakyu-cho 3-chom, Higashimatsuyame-shi Saitama, 355-8603, JP)
Ito, Satoru c/o Bosch Automotive Systems (Corporation 13-26, Yakyu-cho 3-chom, Higashimatsuyame-shi Saitama, 355-8603, JP)
Application Number:
PCT/JP2002/008253
Publication Date:
February 26, 2004
Filing Date:
August 13, 2002
Export Citation:
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Assignee:
BOSCH AUTOMOTIVE SYSTEMS CORPORATION (6-7 Shibuya 3-chome, Shibuya-ku, Tokyo, 150-0002, JP)
Hamahata, Toshihiro c/o Bosch Automotive Systems (Corporation 13-26, Yakyu-cho 3-chom, Higashimatsuyame-shi Saitama, 355-8603, JP)
Ito, Satoru c/o Bosch Automotive Systems (Corporation 13-26, Yakyu-cho 3-chom, Higashimatsuyame-shi Saitama, 355-8603, JP)
International Classes:
F01N3/02; B01D46/42; F01N3/023; F01N3/025; F01N3/032; F01N9/00; F01N13/04; (IPC1-7): F01N3/02
Attorney, Agent or Firm:
Takano, Masatoshi (Yoshitoku Building 6F, 15-14 Shiba 3-chom, Minato-ku Tokyo, 105-0014, JP)
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