Denso Corporation

Yamaha Hatsudoki Kabushiki Kaisha

Makoto Wakimura

Makoto Kobayashi

Kazuteru Iwamoto

Yoshihiko Nonogaki

Masato Nishigaki

Minoru Hotta

Makoto Kuroiwa

Daisuke Takasu

Ryo Tomii

Takuma Ito

Naoki Nagata

Yoh Aramaki

Kazuhiro Ishizawa

Shunichi Akama

Takahiko Hara

Yuji Araki

Yuji Oku

An object is to provide a misfire detection device and a vehicle with an enhanced detection reliability. A misfire detection device includes: a rotation speed acquisition unit configured to acquire a rotation speed of a rotator rotated by a four-stroke engine; a misfire determination unit configured to determine the presence or absence of a misfire in the four-stroke engine based on the rotation speed of the rotator acquired by the rotation speed acquisition unit; and a periodic fluctuation detection unit configured to detect a periodic fluctuation contained in a rotation fluctuation of the four-stroke engine based on a rotation speed acquired by the rotation speed acquisition unit, the periodic fluctuation being repeated on a circulation cycle of at least one element of a wrapping transmission element or a plurality of transmission wheels, the periodic fluctuation having a plurality of extreme values within the circulation cycle of the one element.

Misfire detection device and vehicle

A control device for a rotating element rotated by a four-stroke engine has a high degree of freedom in the choice of an apparatus to which the control device is applicable. The control device includes a rotation speed acquisition unit configured to obtain a rotation speed of the rotating element rotated by the four-stroke engine, and an undulation detection unit configured to, based on the rotation speed obtained by the rotation speed acquisition unit, detect a periodic undulation contained in a rotation fluctuation of the four-stroke engine, the periodic undulation having an angular period longer than a crank angle corresponding to four strokes.

Control device

Growing community of inventors

Iwata, Japan

Makoto Wakimura