Structure for coupling shaft and valve in throttle body

(19)

(11)

EP 1 128 040 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	21.08.2002 Bulletin 2002/34

(43)	Date of publication A2:
	29.08.2001 Bulletin 2001/35

(21)	Application number: 01103968.2

(22)	Date of filing: 19.02.2001

(51)	International Patent Classification (IPC)⁷: F02D 9/10

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

22.02.2000 JP 2000044976

(71)	Applicant: MIKUNI CORPORATION
	Chiyoda-ku, Tokyo (JP)

(72)	Inventors:
	Karasawa, Toshio, c/o Mikuni Corporation Odawara-shi, Kanagawa (JP) Soyama, Hiroaki, c/o Mikuni Corporation Odawara-shi, Kanagawa (JP) Hirakawa, Fumihiro, c/o Mikuni Corporation Odawara-shi, Kanagawa (JP) Osanai, Atsushi, c/o Mikuni Corporation Odawara-shi, Kanagawa (JP) Yoshizaki, Keisuke, c/o Mikuni Corporation Odawara-shi, Kanagawa (JP)

(74)	Representative: Betten & Resch
	Postfach 10 02 51 80076 München 80076 München (DE)

(54)	Structure for coupling shaft and valve in throttle body

(57) A structure for coupling a throttle valve (12) and a throttle shaft (13) in a throttle body reliably receives thrust force applied to the throttle shaft (13), and assures smooth rotation of the throttle shaft (13) and a wide open area of a bore when the throttle valve (12) is fully opened.
In this structure, the throttle valve (12) is in the shape of a disc, and the throttle shaft (13) is in the shape of a plate parallel to the throttle valve (12), and is formed with a recess (13e). The throttle valve has a through-hole (12b), and projections (12d) to be fitted in the recess (13e) of the throttle shaft (13). Further, a thrust surface (12e) is formed at an entrance of the through-hole (12b), and receives thrust force applied to the throttle shaft (13) when brought into contact with an inner surface of a bore.

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