公开(公告)号：US10794811B2

公开(公告)日：2020-10-06

申请号：US15769797

申请日：2016-10-20

Applicant: DENSO CORPORATION

Inventor： Go Miyagawa ,  Masayuki Tamura ,  Masahiro Yamamoto ,  Takashi Araki ,  Toshihiro Sakawa ,  Masato Katsuno ,  Manabu Yoshidome

IPC: G01N15/06 ,  F01N11/00 ,  F01N3/023 ,  F01N13/00

Abstract: An apparatus which detects particulate matter is provided. This apparatus estimates a volume of water inside an exhaust passage using estimation sections. When an estimated volume of water is larger than a water drainage threshold, an element portion is heated using a heater by the first temperature range controller, in a temperature range which resists water-induced cracking independent of a volume of water droplets. If the estimated volume of water is less than a water drainage threshold, the water drainage determination section determines that the water drainage of the exhaust passage is completed. Additionally, if it is estimated that the water drainage is completed, the element portion is heated by a second temperature controller at temperature lower than a starting temperature of combustion of particulate matter and in order to repel water adhered onto the element portion in a water-repellent temperature range for a predetermined period.

公开(公告)号：US10648381B2

公开(公告)日：2020-05-12

申请号：US15769794

申请日：2016-10-21

Applicant: DENSO CORPORATION

Inventor： Masayuki Tamura ,  Takashi Araki ,  Masahiro Yamamoto ,  Go Miyagawa ,  Manabu Yoshidome ,  Masato Katsuno ,  Toshihiro Sakawa

IPC: F01N3/023 ,  G01N27/04 ,  G01N15/06 ,  F01N3/00 ,  F02D41/14

Abstract: A particulate matter detecting device includes: an element unit on which particulate matter contained in exhaust gas from an internal combustion engine is deposited; a heater that heats the element unit; a detecting unit that detects the amount of particulate matter on the basis of electrical characteristics of the element unit; and a control unit that controls the operation of the heater. For a predetermined period that does not include a period in which the particulate matter is deposited on the element unit, the control unit operates the heater using a predetermined amount of control set in advance such that the temperature of the element unit is higher than the temperature of the exhaust gas and lower than a predetermined temperature at which the element unit is thermally degraded.