Low pressure valve, for controlling exhaust gas recirculation
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02M-025/07
F02D-009/10
F02B-047/08
F16K-001/22
F02M-026/48
F02M-026/54
F02M-026/70
F02M-026/72
출원번호
US-0680418
(2012-11-19)
등록번호
US-9638140
(2017-05-02)
우선권정보
DE-10 2011 119 139 (2011-11-23)
발명자
/ 주소
Bareis, Bernd
출원인 / 주소
Gustav Wahler GmbH u. Co. KG
대리인 / 주소
Striker, Michael J.
인용정보
피인용 횟수 :
0인용 특허 :
23
초록▼
A low pressure valve for controlling exhaust gas recirculation in an internal combustion engine for a vehicle includes a housing, which contains a channel section for exhaust gas guidance, and a valve element disposed in the housing to control the exhaust gas passage in the channel section. An actua
A low pressure valve for controlling exhaust gas recirculation in an internal combustion engine for a vehicle includes a housing, which contains a channel section for exhaust gas guidance, and a valve element disposed in the housing to control the exhaust gas passage in the channel section. An actuating drive is mounted on the housing and adjusts the valve element. The actuating drive is formed of an electromagnetic rotary actuator with a drive shaft thereof. The drive shaft is routed in an extended manner out of a rotary actuator housing and is in the form of an actuating shaft. The actuating shaft extends continuously to the housing and protrudes into the housing transversely to the flow direction, engages therein at the valve element in a non-rotatable manner and can be rotationally adjusted about the axis to actuate the valve element.
대표청구항▼
1. A low pressure valve for controlling exhaust gas recirculation in an internal combustion engine comprising: a valve housing configured with a channel section for exhaust gas guidance and a valve element for controlling an exhaust gas passage in the channel section; andan actuating drive in a form
1. A low pressure valve for controlling exhaust gas recirculation in an internal combustion engine comprising: a valve housing configured with a channel section for exhaust gas guidance and a valve element for controlling an exhaust gas passage in the channel section; andan actuating drive in a form of an electromagnetic rotary actuator that is configured for adjusting the valve element and comprises a rotary actuator housing, a coil and a rotor;wherein the rotary actuator housing is mounted on the valve housing;wherein the actuating drive comprises a one-piece element, the one-piece element having a first section embodying a drive shaft and a second section embodying an actuating shaft;wherein the drive shaft is arranged in the rotary actuator housing and is non-rotatably connected to the rotor;wherein the actuating shaft is an extension of the drive shaft such that the actuating shaft extends continuously to the drive shaft, is routed in an extended manner out of the rotary actuator housing, is supported via an end section of the drive shaft contained in the rotary actuator housing and protrudes into the valve housing transversely to a flow direction in the channel section;wherein the actuating shaft engages in the valve housing at the valve element in a non-rotatable manner and is rotationally adjusted about an axis in order to actuate the valve element;wherein the valve element is formed of a circular flap having edge regions on both sides of an axis of the actuating shaft;wherein the valve housing comprises axial stop surfaces that are planar and face the flow direction in the channel section;wherein the circular flap, in a closed position, is positioned transversely to the channel section and bears against the axial stop surfaces via the edge regions;wherein the end section of the drive shaft is supported by a radial bearing and by an axial bearing;wherein the radial bearing and the axial bearing both are arranged in the rotary actuator housing; andwherein the axial bearing is a ball bearing that is arranged between the coil and the rotor of the electromagnetic rotary actuator. 2. The valve according to claim 1, wherein the actuating shaft is supported in the valve housing in only one radial bearing disposed in the valve housing, as viewed along the axis, on one side of the flap and at a distance therefrom. 3. The valve according to claim 1, further comprising a contactless rotary position sensor device for direct sensing the position of the flap, wherein the contactless rotary position sensor device comprises a sensor element fixedly connected to the drive shaft. 4. The valve according to claim 1, wherein the flap contains a diametrically extending bore, in which an assigned end region of the actuating shaft is accommodated. 5. The valve according to claim 1, wherein the flap is fastened via one or more fastening means at the actuating shaft, which fastening means are directed transversely to the axis and extend through transversely extending bores in the actuating shaft and in the flap. 6. The valve according to claim 1, wherein the actuating shaft extends through the valve housing only in a valve housing region located between the flap and the rotary actuator, and wherein the actuating shaft extends together with the flap into the channel section. 7. The valve according to claim 4, wherein the diametric bore is in the form of a blind-hole bore. 8. The valve according to claim 4, wherein the diametric bore of the flap is in the form of a diametrically continuous bore that is open at both ends. 9. The valve according to claim 8, wherein the actuating shaft extends through the valve housing on both sides of the flap and is supported by way of a radial bearing in the valve housing via an actuating shaft end, and wherein the actuating shaft end extends out of the flap on the side thereof facing away from the rotary actuator. 10. The valve according to claim 2, wherein the radial bearing is sealed in the valve housing toward the channel section by way of a sealing ring made of a peroxide-cured plastic. 11. The valve according to claim 1, wherein a driving element is non-rotatably and axially coupled to the actuating shaft and, a failsafe spring formed as a cylindrical coil spring, are disposed in the valve housing between same and the rotary actuator, and wherein the failsafe spring is accommodated and centered within the driving element and fixed via a spring end at the driving element while another spring end is fixed at the rotary actuator housing. 12. The valve according to claim 11, wherein a lock-in element is fastened at the actuating shaft and engages in a form-fit manner in an axial lock-in opening of the driving element in order to rotationally drive the driving element. 13. The valve according to claim 12, wherein the driving element is axially coupled to the actuating shaft by way of a clip connection. 14. The valve according to claim 13, wherein the clip connection comprises lock-in elements, formed as lock-in projections that interact with the lock-in element and are radially separated with respect to the lock-in opening and with which the lock-in element axially locks during assembly. 15. The valve according to claim 11, wherein the failsafe spring is centered via a substantially cylindrical guide part thereof with respect to the rotary actuator housing, and wherein the guide part is overlapped by the spring. 16. The valve according to claim 1, wherein the valve housing comprises a fastening flange and the rotary actuator housing comprises fastening tabs that are connected to one another by fastening means extending therethrough. 17. The valve according to claim 16, wherein the fastening flange of the valve housing contains a recess that is coaxial with respect to the actuating shaft and wherein the driving element and the failsafe spring are accommodated by the recess. 18. The valve according to claim 1, wherein the flap comprises a circumferential lip with a smaller cross-sectional thickness on an outer edge, by way of which the flap axially bears in the closed position against the axial stop surfaces of the valve housing in a sealing manner. 19. The valve according to claim 1, wherein the axial stop surfaces of the valve housing are contained within a plane that extends obliquely at an acute angle with respect to a diagonal of the channel section. 20. The valve according to claim 1, wherein the channel section comprises a tube lining made of stainless steel that is fixedly connected to the valve housing as corrosion protection and which comprises the axial stop surfaces. 21. The valve according to claim 1, wherein the valve housing is formed as an aluminum diecast part. 22. The valve according to claim 1, wherein the flap is formed of a precision-cast part made of stainless steel. 23. A low pressure valve for controlling exhaust gas recirculation in an internal combustion engine comprising: a valve housing configured with a channel section for exhaust gas guidance and a valve element for controlling an exhaust gas passage in the channel section; andan actuating drive in a form of an electromagnetic rotary actuator that is configured for adjusting the valve element and comprises a rotary actuator housing, a coil and a rotor;wherein the rotary actuator housing is mounted on the valve housing;wherein the actuating drive comprises one single shaft configured to operate as a drive shaft and as an actuating shaft;wherein the drive shaft is arranged in the rotary actuator housing and is non-rotatably connected to the rotor;wherein the actuating shaft extends continuously to the drive shaft;wherein the actuating shaft is routed in an extended manner out of the rotary actuator housing and is supported via an end section of the drive shaft contained in the rotary actuator housing:wherein the actuating shaft protrudes into the valve housing transversely to a flow direction in the channel section;wherein the actuating shaft acts in a non-rotatable manner on the valve element in the valve housing and is rotationally adjusted about an axis in order to actuate the valve element;wherein the valve element is formed of a circular flap having edge regions on both sides of an axis of the actuating shaft;wherein the valve housing comprises axial stop surfaces are planar and face the flow direction in the channel section;wherein the circular flap, in a closed position, is positioned transversely to the channel section and bears against the axial stop surfaces via the edge regions;wherein the end section of the drive shaft is supported by a radial bearing and by an axial bearing;wherein the radial bearing and the axial bearing both are arranged in the rotary actuator housing; andwherein the axial bearing is arranged between the coil and the rotor of the electromagnetic actuator. 24. A low pressure valve for controlling exhaust gas recirculation in an internal combustion engine comprising: a valve housing configured with a channel section for exhaust gas guidance and a valve element for controlling an exhaust gas passage in the channel section; andan actuating drive in a form of an electromagnetic rotary actuator that is configured for adjusting the valve element and comprises a rotary actuator housing;wherein the rotary actuator housing is mounted on the valve housing;wherein the actuating drive comprises a one-piece drive and actuating shaft comprising a drive shaft section and an actuating shaft section;wherein the drive shaft section is arranged in the rotary actuator housing;wherein the actuating shaft section extends continuously to the drive shaft section;wherein the actuating shaft section is routed in an extended manner out of the rotary actuator housing and is supported via an end section of the drive shaft section contained in the rotary actuator housing;wherein the actuating shaft section and protrudes into the valve housing transversely to a flow direction in the channel section;wherein the actuating shaft section acts in a non-rotatable manner on the valve element in the valve housing and is rotationally adjusted about an axis in order to actuate the valve element;wherein the valve element is formed of a circular flap having edge regions on both sides of an axis of the actuating shaft section;wherein the valve housing comprises axial stop surfaces are planar and face the flow direction in the channel section;wherein the circular flap, in a closed position, is positioned transversely to the channel section and bears against the axial stop surfaces via the edge regionswherein the end section of the drive shaft section is supported by a radial bearing and by an axial bearing; andwherein the radial bearing and the axial bearing both are arranged in the rotary actuator housing.
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