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:
May. 26, 2020
Filed:
May. 09, 2018
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Shin Miura, Hiroshima, JP;
Akio Saiki, Hiroshima, JP;
Hiroshi Okubo, Higashihiroshima, JP;
Kuninori Suzuki, Hiroshima, JP;
Kenichi Ogasawara, Hiroshima, JP;
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Abstract
A misfire detecting device for an engine is provided, which includes a processor configured to execute a cylinder operation controlling module to switch an engine operation mode from an all-cylinder operation to a reduced-cylinder operation in which operation of one or some of cylinders are suspended, when an execution condition of the reduced-cylinder operation is satisfied, a misfire detecting module to detect a possibility of misfire occurrence based on an angular speed variation of the engine, and a centrifugal damping part configured to reduce vibration caused by the engine. When a possible misfire state is detected by the misfire detecting module during the reduced-cylinder operation, the cylinder operation controlling module executes an operating-cylinder increase control in which the number of operating cylinders is increased. When the possible misfire state is continuously detected after the operating-cylinder increase control, the misfire detecting module detects the engine misfire.