Denso Corporation

Yamaha Hatsudoki Kabushiki Kaisha

Daisuke Nonaka

Michihisa Nakamura

Yoko Fujime

Yoshihiko Nonogaki

Minoru Hotta

Michiyasu Takahashi

Naoki Nagata

Yuuichirou Sawada

Takao Koya

Yutaka Asakura

The present teaching aims to provide: a cam angle sensor fault diagnosis apparatus for straddled vehicle, capable of detecting a fault of a cam angle sensor installed in a straddled vehicle and guessing a fault place; an engine system; and a straddled vehicle. A cam angle sensor fault diagnosis apparatus for straddled vehicle includes: a cam signal receiving unit connected to a signal output line through which a cam angle sensor outputs a cam signal in accordance with the rotation angle, the cam signal receiving unit being configured to receive a cam signal via the signal output line; a state determination unit that determines one or two fault states of the cam angle sensor from a disconnection state, a power supply fault state, and a ground fault state, distinguishably from the other fault states, in accordance with a signal level of a cam signal received by the cam signal receiving unit; and a signal output unit that outputs a fault signal representing the one or two fault states determined by the state determination unit, in such a manner that the fault signal representing the one or two fault states is different from a fault signal representing the other fault states.

Cam angle sensor fault diagnosis apparatus for straddled vehicle, engine system, and straddled vehicle

Growing community of inventors

Iwata, Japan

Daisuke Nonaka