公开(公告)号：US20180231434A1

公开(公告)日：2018-08-16

申请号：US15953123

申请日：2018-04-13

Applicant: DENSO CORPORATION ,  YAMAHA HATSUDOKI KABUSHIKI KAISHA

Inventor： Minoru HOTTA ,  Yoshihiko NONOGAKI ,  Naoki NAGATA ,  Daisuke NONAKA ,  Yoko FUJIME

IPC: G01M15/04 ,  B62M7/02

CPC classification number: G01M15/046 ,  B62M7/02 ,  F01L1/34 ,  F02D35/0007 ,  F02D41/222 ,  F02D45/00 ,  F02D2200/10 ,  Y02T10/40

Abstract: 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.

公开(公告)号：US20180087462A1

公开(公告)日：2018-03-29

申请号：US15829920

申请日：2017-12-02

Applicant: DENSO CORPORATION ,  YAMAHA HATSUDOKI KABUSHIKI KAISHA

Inventor： Minoru HOTTA ,  Yoshihiko NONOGAKI ,  Kazuteru IWAMOTO ,  Makoto WAKIMURA ,  Naoki NAGATA

IPC: F02D41/14 ,  F02B75/02 ,  F02D41/00 ,  G07C5/08

CPC classification number: F02D41/1498 ,  F02B61/02 ,  F02B75/02 ,  F02B77/08 ,  F02B2075/027 ,  F02D41/0097 ,  F02D41/1497 ,  F02D41/22 ,  F02D45/00 ,  F02D2041/286 ,  F02D2200/101 ,  F02D2200/1015 ,  G07C5/0825

Abstract: 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.