Throttle valve and internal combustion engine comprising such a throttle valve

Patent metadata

Field	Value
Publication number	US-9863329-B2
Application number	US-201414906357-A
Country	US
Kind code	B2
Filing date	Jun 16, 2014
Priority date	Jul 26, 2013
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

The present invention relates to a throttle valve adapted to equip an air intake system in an internal combustion engine, in particular an explosion engine. The throttle valve comprises: a body delimiting an air intake pipe; a valve member mounted rotatably in the pipe about an axis of rotation and comprising a spherical portion shutting off the pipe in the closed configuration; means for moving the valve member in rotation about the axis of rotation between different configurations of the throttle valve; and a bearing ring which receives a spherical outer surface of the valve member in sliding bearing contact. The throttle valve is characterized in that it also comprises a seal which is elastically deformable, which is arranged between the body and the bearing ring and which is adapted to take up forces to which the valve member and the bearing ring are subjected during a back-fire through the pipe. The invention also relates to an internal combustion engine, in particular an explosion engine, comprising such a throttle valve.

First claim

The invention claimed is:

1. A throttle valve adapted to equip an air intake system in an internal combustion engine, in particular an explosion engine, the throttle valve comprising:
a body delimiting an air intake pipe;
a valve member mounted rotatably in the pipe about an axis of rotation and comprising a spherical portion shutting off the pipe in a closed configuration;
means for moving the valve member in rotation about the axis of rotation between different configurations of the throttle valve, including an open configuration and the closed configuration; and
a bearing ring which is arranged in a housing of the body, which receives a spherical outer surface of the valve member in sliding bearing contact, which delimits an opening for air circulation through the pipe and which is adapted to take up forces to which the valve member is subjected during a back-fire through the pipe, the spherical portion of the valve member shutting off the opening in the closed configuration;

wherein the throttle valve also comprises a seal which is elastically deformable, which is arranged between the body and the bearing ring and which is adapted to take up forces to which the valve member and the bearing ring are subjected during a back-fire through the pipe.

2. The throttle valve as claimed in claim 1 , wherein, in cross section, the seal has a body having a V-shaped profile delimiting a hollow.

3. The throttle valve as claimed in claim 1 , wherein the valve member is made of plastic.

4. The throttle valve according to claim 1 , wherein the valve member also comprises an annular portion secured to the spherical portion and delimiting an opening for air circulation through the pipe in the open configuration.

5. The throttle valve as claimed in claim 1 , wherein the valve member comprises lateral shafts which extend out of the pipe and are rotatable about the axis in housings delimited in the body.

6. The throttle valve as claimed in claim 5 , wherein the valve member does not comprise a central shaft situated in the pipe.

7. The throttle valve as claimed in claim 1 , wherein, in the open configuration, the spherical portion of the valve member is housed on a side of the pipe in the body, without locally reducing the air passage cross section between an upstream orifice and a downstream orifice of the pipe.

8. The throttle valve as claimed in claim 1 , wherein the spherical portion of the valve member comprises a convex outer surface and a concave inner surface each having a spherical profile.

9. The throttle valve as claimed in claim 1 , wherein the spherical portion of the valve member has a concave spherical surface oriented toward a downstream orifice of the pipe, through which orifice a back-fire is capable of rising in the pipe.

10. The throttle valve as claimed in claim 1 , wherein the valve member comprises a lateral shaft cooperating with the means for moving the valve member about the axis of rotation.

11. The throttle valve as claimed in claim 1 , wherein the body comprises a first casing part and a second casing part together delimiting a housing for receiving a lateral shaft belonging to the valve member.

12. The throttle valve as claimed in claim 11 , wherein a peripheral seal is arranged at a joint plane between the first casing part and the second casing part.

13. The throttle valve as claimed in claim 12 , wherein the peripheral seal comprises a portion offset on an outer side of the housing with respect to the pipe, whereas the housing and the lateral shaft do not comprise a seal.

14. An internal combustion engine, in particular an explosion engine, wherein it comprises a throttle valve as claimed in claim 1 .

15. The throttle valve as claimed in claim 1 , wherein the seal is in direct contact with the bearing.

16. The throttle valve as claimed in claim 1 , wherein the bearing is an annular bearing that extends about a path of air flow from the air intake pipe into the valve member.

17. The throttle valve as claimed in claim 1 , wherein the axis of rotation extends in a direction normal to an axis about which the seal extends.

18. The throttle valve as claimed in claim 1 , wherein the seal is coaxial with an interior of the air intake pipe leading to the valve member.

19. The throttle valve as claimed in claim 1 , wherein the valve member includes lugs that support the valve member, the lugs extending from the valve member in the direction of the axis of rotation, and the seal and the bearing are spaced completely away from the lugs.

20. The throttle valve as claimed in claim 1 , wherein the wherein the valve member includes lugs that support the valve member, and an inner diameter of the bearing is many times larger than the outer diameter of the lugs.

Assignees

• Illinois Tool Works

Inventors

• Vaginet Dominique
• Granier Philippe

Classifications

• F02D9/101

  Special flap shapes, ribs, bores or the like · CPC title

• F02D9/1045

  for sealing of the flow in closed flap position, e.g. the housing forming a valve seat · CPC title

• F02D9/16 Primary

  the members being rotatable · CPC title

• F02D9/108

  Plastics · CPC title

• F02D9/02

  concerning induction conduits (throttle valves, or arrangements thereof in conduits F02D9/08) · CPC title