IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0322487
(2002-12-19)
|
우선권정보 |
JP-0388298 (2001-12-20) |
발명자
/ 주소 |
- Kawai, Shinji
- Nishimura, Kazuhiko
|
출원인 / 주소 |
- Aisan Kogyo Kabushiki Kaisha
|
대리인 / 주소 |
Dennison, Schultz, Dougherty &
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
8 |
초록
▼
Throttles (10) include a bore (1b) defined within throttle body (1a). A longitudinal axis defined within the bore serves as a throttle air flow channel. Throttle shaft (3) extends across the air flow channel and is rotatably supported by the throttle body about a rotational axis. Throttle valve (5)
Throttles (10) include a bore (1b) defined within throttle body (1a). A longitudinal axis defined within the bore serves as a throttle air flow channel. Throttle shaft (3) extends across the air flow channel and is rotatably supported by the throttle body about a rotational axis. Throttle valve (5) is coupled to the throttle shaft and opens and closes the air flow channel by rotating throttle shaft and throttle valve within the bore. The throttle valve extends perpendicularly to the longitudinal axis of the bore when the throttle valve is disposed in a fully closed position. Clearance (S) is defined between a peripheral edge (5a) of throttle valve and an inner wall of the bore when the throttle valve is in the fully closed position. The peripheral edge of the throttle valve end defines a substantially spherical surface having a radius (R) of curvature with respect to the rotational axis.
대표청구항
▼
1. A throttle valve comprising:a rotational axis and an outer peripheral edge; wherein the peripheral edge includes a spherical curved portion having a radius of curvature with respect to a point on the rotational axis, and a cylindrical curved portion having a radius of curvature with respect to th
1. A throttle valve comprising:a rotational axis and an outer peripheral edge; wherein the peripheral edge includes a spherical curved portion having a radius of curvature with respect to a point on the rotational axis, and a cylindrical curved portion having a radius of curvature with respect to the rotational axis, and wherein the spherical curved portion and the cylindrical curved portion are formed on one side and the other side in the thickness direction of the throttle valve, respectively. 2. A throttle valve as in claim 1, wherein the peripheral edge has a substantially circular configuration as viewed in the thickness direction of the throttle valve.3. A throttle comprising:a throttle valve having a rotational axis and an outer peripheral edge, a throttle body having a longitudinal axis, and a bore defined within the throttle body, wherein the throttle valve is rotatably disposed within the bore about the rotational axis, such that the amount of air flow through the bore varies in response to the rotational position of the throttle valve with respect to the bore; wherein the peripheral edge of the throttle valve includes a spherical curved portion having a radius of curvature with respect to a point on the rotational axis, and a cylindrical curved portion having a radius of curvature with respect to the rotational axis, and wherein the spherical curved portion and the cylindrical curved portion are formed on one side and the other side in the thickness direction of the throttle valve, respectively. 4. A throttle as in claim 3, wherein the throttle valve extends substantially perpendicular to the longitudinal axis of the bore when the throttle valve is disposed in a fully closed position, and wherein a clearance is defined between the peripheral edge of the throttle valve and an inner wall of the bore when the throttle valve is disposed in the fully closed position, and wherein a passage for a flow of air being defined in the fully closed position of the throttle valve by the clearance, and the width of the clearance is substantially constant at a small angle of rotation of the throttle valve due to the peripheral edge of the throttle valve including the spherical curved portion and the cylindrical curved portion.5. A throttle as in claim 4, further including a throttle shaft rotatably supported within the throttle body and being affixed to the throttle valve.6. A throttle as in claim 5, further including a lever, and a stopper arranged and constructed to abut the lever when the throttle valve is disposed in the fully closed position, wherein the lever is affixed to the throttle shaft and the stopper is disposed outside of the bore.7. A throttle as in claim 3, wherein the peripheral edge has a substantially circular configuration as viewed in the thickness direction of the throttle valve.8. A throttle comprising:a throttle body, a bore defined within the throttle body, wherein a longitudinal axis is defined within the bore and the bore serves as an air flow channel, a throttle shaft extending across the air flow channel and being rotatably supported by the throttle body about a rotational axis; a throttle valve affixed to the throttle shaft and being arranged and constructed to open and close the air flow channel by rotating the throttle shaft and the throttle valve within the bore, the throttle valve being further arranged and constructed such that the throttle valve extends substantially perpendicular to the longitudinal axis of the bore when the throttle valve is disposed in a fully closed position with respect to the bore, and wherein a clearance is defined between a peripheral edge of the throttle valve and an inner wall of the bore when the throttle valve is disposed in the fully closed position, a stopper disposed on the throttle body in a position outside of the air flow channel, and a lever coupled to the throttle shaft and being arranged and constructed to contact the stopper when the throttle valve is disposed in the fully closed position, wherein the peripheral edge of the throttle valve includes a spherical curved portion having a radius of curvature with respect to a point on the rotational axis, and a cylindrical curved portion having a radius of curvature with respect to the rotational axis, and wherein the spherical curved portion and the cylindrical curved portion are formed on one side and the other side in the thickness direction of the throttle valve, respectively. 9. A throttle as in claim 8, wherein the peripheral edge has a substantially circular configuration as viewed in the thickness direction of the throttle valve.10. A throttle valve as in claim 1, wherein the throttle valve has a right side half and a left side half with respect to the rotational axis, and the spherical curved portion and the cylindrical curved portion are positioned on the side of a valve closing direction and the side of a valve opening direction, respectively, of each of the right and left side halves.11. A throttle valve as in claim 1, wherein each of the spherical curved portion and the cylindrical curved portion extends in the thickness direction along a length corresponding to substantially half the thickness of the throttle valve.12. A throttle as in claim 3, wherein the throttle valve has a right side half and a left side half with respect to the rotational axis, and the spherical curved portion and the cylindrical curved portion are positioned on the side of a valve closing direction and the side of a valve opening direction, respectively, of each of the right and left side halves.13. A throttle as in claim 3, wherein each of the spherical curved portion and the cylindrical curved portion extends in the thickness direction along a length corresponding to substantially half the thickness of the throttle valve.
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