公开(公告)号：US20200018679A1

公开(公告)日：2020-01-16

申请号：US16340231

申请日：2017-10-05

Applicant: DENSO CORPORATION

Inventor： Kazuhiko KOIKE ,  Masahiro YAMAMOTO ,  Michiyasu MORITSUGU ,  Kensuke TAKIZAWA

IPC: G01N15/06 ,  G01N1/22 ,  F01N13/00 ,  G01N27/04

Abstract: A detection conductive section and a monitor conductive section made of a conductive material having a higher electrical resistivity than that of PM are included. A deposition surface on which the PM is deposited is provided to the detection conductive section. A pair of detection electrodes are provided to the deposition surface. A pair of monitor electrodes are provided to the monitor conductive section. The configuration is made such that no PM is deposited on the monitor conductive section between the pair of monitor electrodes.

公开(公告)号：US20190078528A1

公开(公告)日：2019-03-14

申请号：US16080436

申请日：2017-02-13

Applicant: DENSO CORPORATION

Inventor： Michiyasu MORITSUGU ,  Shunichi TAKEDA

IPC: F02D41/22 ,  F02P1/08

Abstract: A failure diagnosis device for an ignition circuit, comprising: an ignition plug; an ignition coil; a capacitor series connection including a high side capacitor and a low side capacitor; a switching-element series connection including a high side switching element and a low side switching element; an inter-terminal voltage detection unit for detecting an inter-terminal voltage of the capacitor series connection; an intermediate voltage detection unit for detecting an intermediate voltage at the connection point of the high side capacitor and the low side capacitor; and a determination unit for determining a failure location of the ignition circuit based on at least one of the inter-terminal voltage and the intermediate voltage.