JPWO2021245812A5

JPWO2021245812A5 -

Info

Publication number: JPWO2021245812A5
Application number: JP2022528941A
Authority: JP
Filing date: 2020-06-02
Publication date: 2022-07-14
Anticipated expiration: 2040-06-02

Description

この開示に係る排気ガス再循環バルブは、ポペット式の排気ガス再循環バルブであって、一端に弁体が固定された軸方向に直動する弁軸が突設されたアクチュエータと、排気ガスの流路を形成し、弁軸が挿通されるハウジングと、弁軸の径方向の弁軸の側面に対向するハウジングの内壁に、弁軸の周方向に弁軸を囲んで設けられた第１仕切部であって、当該内壁から弁軸に向かって突出し、且つ、前記弁体側の面が、前記弁軸に近い部位ほど前記弁体側に向かって傾斜し、且つ、弁軸との間に隙間を有して弁軸が挿通される第１孔を有する第１仕切部と、径方向の弁軸の側面に対向するハウジングの内壁のうちの、第１仕切部が設けられた位置よりアクチュエータに近い位置の内壁に、周方向に弁軸を囲んで設けられた第２仕切部であって、当該内壁から弁軸に向かって突出し、且つ、弁軸が挿通される第２孔を有する第２仕切部と、径方向の弁軸の側面に、周方向に弁軸を囲んで設けられたたシール部であって、当該側面からハウジングの内壁に向かって突出し、且つ、弁軸が第１方向に直動した際に第１仕切部に当接し、弁軸が第１方向とは逆方向である第２方向に直動した際に第２仕切部に当接するシール部と、を備えたものである。 The exhaust gas recirculation valve according to this disclosure is a poppet type exhaust gas recirculation valve, and is an actuator in which a valve body is fixed at one end and a valve shaft that directly moves in the axial direction is provided, and exhaust gas. A first partition is provided on the inner wall of a housing that forms a flow path and through which a valve shaft is inserted and a housing that faces the side surface of the valve shaft in the radial direction of the valve shaft so as to surround the valve shaft in the circumferential direction of the valve shaft. A portion that protrudes from the inner wall toward the valve shaft, and the surface on the valve body side is inclined toward the valve body side toward a portion closer to the valve shaft, and a gap is provided between the portion and the valve shaft. The first partition having a first hole through which the valve shaft is inserted and the inner wall of the housing facing the side surface of the valve shaft in the radial direction are closer to the actuator than the position where the first partition is provided. A second partition provided on the inner wall at the position so as to surround the valve shaft in the circumferential direction, and has a second hole protruding from the inner wall toward the valve shaft and having a second hole through which the valve shaft is inserted. A sealing portion provided on the side surface of the valve shaft in the radial direction so as to surround the valve shaft in the circumferential direction, protruding from the side surface toward the inner wall of the housing, and the valve shaft in the first direction. It is equipped with a seal portion that abuts on the first partition when it moves linearly and abuts on the second partition when the valve shaft moves linearly in the second direction opposite to the first direction. be.

Claims

It is a poppet type exhaust gas recirculation valve.
An actuator with a valve shaft that moves linearly in the axial direction, with the valve body fixed at one end, and an actuator
A housing that forms a flow path for exhaust gas and through which the valve shaft is inserted,
A first partition portion provided on the inner wall of the housing facing the side surface of the valve shaft in the radial direction of the valve shaft so as to surround the valve shaft in the circumferential direction of the valve shaft, and the valve is formed from the inner wall. The valve shaft protrudes toward the shaft and the surface on the valve body side is inclined toward the valve body side as the portion closer to the valve shaft, and the valve shaft is inserted with a gap between the valve shaft and the valve shaft. The first partition having the first hole to be formed,
Of the inner wall of the housing facing the side surface of the valve shaft in the radial direction, the valve shaft in the circumferential direction is on the inner wall at a position closer to the actuator than the position where the first partition portion is provided. A second partition portion provided surrounding the above, which protrudes from the inner wall toward the valve shaft and has a second hole through which the valve shaft is inserted.
A sealing portion provided on the side surface of the valve shaft in the radial direction so as to surround the valve shaft in the circumferential direction, protruding from the side surface toward the inner wall of the housing, and the valve shaft When the valve shaft moves linearly in the first direction, it comes into contact with the first partition, and when the valve shaft moves straight in the second direction opposite to the first direction, it comes into contact with the second partition. Seal part and
Exhaust gas recirculation valve featuring.

The exhaust gas recirculation valve according to claim 1, wherein the first partition portion is a flat plate having the first hole.

The exhaust gas recirculation valve according to claim 2, wherein the first partition portion is a circular flat plate having the first hole.

The exhaust gas recirculation valve according to claim 1, wherein the first partition portion is integrally formed with a bush for fixing the second partition portion.

The seal portion is characterized in that the surface on the actuator side is inclined toward the valve body side toward a portion closer to the inner wall of the housing facing the side surface of the valve shaft in the radial direction. Item 1. Exhaust gas recirculation valve according to item 1.

The seal portion has a seal hole through which the valve shaft is inserted, and in a state of being in contact with the first partition portion or the second partition portion, the seal portion is in contact with the valve shaft while maintaining the state. The exhaust gas recirculation valve according to claim 1, wherein the valve slides in the axial direction.

The exhaust gas recirculation valve according to claim 1, wherein the second partition portion is a bearing that slides the valve shaft in the axial direction.