公开(公告)号：US11313267B2

公开(公告)日：2022-04-26

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; and
(2) A second determiner, which performs 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.