公开(公告)号：US20210363910A1

公开(公告)日：2021-11-25

申请号：US17392774

申请日：2021-08-03

Applicant: DENSO CORPORATION

Inventor： Mikiyasu MATSUOKA ,  Tomoo KAWASE ,  Toshiyuki ISHII

IPC: F01N11/00 ,  F01N9/00

Abstract: A particulate matter sensor includes a sensor element that includes a measurement member and a heater. An anomaly determiner performs determination that there is a break fault in a signal path of the measurement signal in response to both
(1) A first determiner, which determines whether a first measurement value of the measurement signal is higher than or equal to a predetermined normal determination threshold while the measurement voltage is applied between the measurement electrodes and the temperature of the measurement member is controlled at a first determination temperature, making a negative determination
(2) A second determiner performing negative determination while the measurement voltage is applied between the measurement electrodes and the temperature of the measurement member is controlled within a predetermined temperature range that is higher than the first determination temperature and lower than a second determination temperature, making a negative determination