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. 03, 2022
Filed:
Mar. 17, 2020
Applicant:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Inventor:
Takumi Anzawa, Okazaki, JP;
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02D 41/14 (2006.01); F02D 41/00 (2006.01); F02D 41/24 (2006.01);
U.S. Cl.
CPC ...
F02D 41/1498 (2013.01); F02D 41/009 (2013.01); F02D 41/2409 (2013.01);
Abstract
A misfire detection device for an internal combustion engine includes a storage device and processing circuitry. The storage device stores mapping data. The mapping data is data specifying a mapping that outputs a misfire variable using a rotation waveform variable as an input. The misfire variable is a variable related to a probability that a misfire has occurred in the internal combustion engine. The rotation waveform variable is a variable based on an instantaneous speed variable corresponding to each of discontinuous rotational angle intervals selected from multiple continuous rotational angle intervals.