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:
Nov. 03, 1998
Filed:
Aug. 05, 1997
Hidetoshi Amano, Okazaki, JP;
Tovota Jidosha Kabushiki Kaisha, Aichi-Ken, JP;
Abstract
A device for accurately detecting misfiring repetitively occurring in the opposing cylinders every 360.degree. CA. An angular velocity detecting means detects the angular velocity of rotation of the crankshaft for each cylinder at the time of combustion. A first rotational change calculation means calculates a first amount of change in the rotation by finding a deviation of angular velocity between the two cylinders of consecutive combustion strokes. A second rotational change calculation means calculates a second amount of change in the rotation by finding a deviation of angular velocity between the two cylinders 360.degree. CA before the moment at which the first rotational change calculation means has detected the angular velocity to calculate the first amount of change in the rotation. An adder means adds up the first amount of change in the rotation calculated by the first rotational change calculation means and the second amount of change in the rotation calculated by the second rotational change calculation means. A misfiring detecting means detects misfiring that occurs every 360.degree. CA by comparing the amount of change in the rotation added up by said adder means with a predetermined discrimination value.