MISFIRE DETECTION DEVICE AND VEHICLE

Title:

MISFIRE DETECTION DEVICE AND VEHICLE

Document Type and Number:

WIPO Patent Application WO/2017/208757

Kind Code:

A1

Abstract:

This invention addresses the problem of providing a misfire detection device having improved detection reliability, and a vehicle. The misfire detection device is provided with: a rotational speed acquisition unit configured so as to obtain the rotational speed of a rotating solid rotated by a four-stroke engine; a misfire determination unit configured so as to determine, on the basis of the rotational speed of the rotating solid obtained by the rotational speed acquisition unit, whether or not there has been any misfiring of the four-stroke engine; and a cyclic fluctuation detection unit configured so as to detect, on the basis of the rotational speed obtained by the rotational speed acquisition unit, cyclic fluctuation that is included in rotational fluctuation of the four-stroke engine, and that is repeated in the circulation cycle of one element among a winding-motion-transmitting body and a plurality of motion-transmitting wheels, so as to have a plurality of extreme values within the circulation cycle of at least one element.

Inventors:

WAKIMURA MAKOTO (JP)
IWAMOTO KAZUTERU (JP)
ARAMAKI YO (JP)
AKAMA SHUNICHI (JP)
HOTTA MINORU (JP)
NONOGAKI YOSHIHIKO (JP)

Application Number:

PCT/JP2017/017727

Publication Date:

December 07, 2017

Filing Date:

May 10, 2017

Export Citation:

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Assignee:

YAMAHA MOTOR CO LTD (JP)
DENSO CORP (JP)

International Classes:

F02D45/00; B62J99/00; F02B61/02; F02B67/06; F16H7/02; F16H7/06; G01M15/04

Foreign References:

JPH0861131A	1996-03-05
JP2014199040A	2014-10-23
JP2010024850A	2010-02-04

Other References: