The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 2021
Filed:
Oct. 25, 2019
Mazda Motor Corporation, Hiroshima, JP;
Shoji Fujiwara, Hiroshima, JP;
Hidetoshi Hashimoto, Aki-gun, JP;
Takuji Okumura, Kure, JP;
Shigeru Nakagawa, Hiroshima, JP;
Yasushi Torii, Hiroshima, JP;
Masayuki Kinoshita, Hiroshima, JP;
Yuichiro Tsumura, Aki-gun, JP;
Daisuke Tanaka, Hiroshima, JP;
Taiki Maiguma, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An abnormality diagnosis device of an in-cylinder pressure sensor is provided. The device carries out a performance determination in which a performance quality of the sensor is determined based on an electric signal inputted from the sensor. The device carries out a first determination in which the performance determination is performed at a given timing, a performance recovery in which a given deposit removal control is executed in which a deposit accumulating inside the combustion chamber is removed when the performance quality of the in-cylinder pressure sensor is determined to fall below a given reference value, and a second determination in which the performance determination is carried out again after the performance recovery. In the second determination, the in-cylinder pressure sensor is diagnosed as abnormal when the performance quality of the sensor is determined to fall below the given reference value.