Filter failure detection device and particulate matter detection device

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 10578518
APP PUB NO 20170307501A1
SERIAL NO

15516163

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Abstract

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A control unit (6) estimates an output value of a PM sensor (S2) located at a downstream side of a DPF used as a reference filter, and detects whether the estimated output value exceeds a predetermined value (S3). When the estimated output value exceeds the predetermined value (YES in S3), the control unit detects an output value of the PM sensor (S4), and a heater heats the PM sensor (S5). The control unit detects an output value of the PM sensor (S6) after the PM sensor is heated, and calculates a change ratio of the output values of the PM sensor before and after heating (S7). The control unit estimates an average particle size of PM based on the calculated change ratio (S8), and detects whether the DPF has failed based on a comparison result of a corrected output value of the PM sensor with a threshold value.

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Patent Owner(s)

Patent OwnerAddress
DENSO CORPORATION1-1 SHOWA-CHO KARIYA-CITY AICHI-PREF 448-8661

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koike, Kazuhiko Nishio, JP 42 275
Shimokawa, Hironobu Nishio, JP 7 8
Takizawa, Kensuke Nishio, JP 7 6
Tamura, Masayuki Kariya, JP 65 604
Yoshidome, Manabu Kariya, JP 9 94

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