IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0579849
(2004-09-08)
|
등록번호 |
US-7309029
(2007-12-18)
|
우선권정보 |
DE-103 54 878(2003-11-24) |
국제출원번호 |
PCT/DE04/001997
(2004-09-08)
|
§371/§102 date |
20060517
(20060517)
|
국제공개번호 |
WO05/052354
(2005-06-09)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
28 인용 특허 :
4 |
초록
▼
A fuel injection device includes at least two valve elements, disposed in a housing and coaxial with one another, with at least one fuel outlet opening associated with each valve element. On the outer valve element, radially outward from the at least one fuel outlet opening associated with it, there
A fuel injection device includes at least two valve elements, disposed in a housing and coaxial with one another, with at least one fuel outlet opening associated with each valve element. On the outer valve element, radially outward from the at least one fuel outlet opening associated with it, there is a first sealing edge which cooperates with a valve seat on the housing and can separate the at least one fuel outlet opening from a high-pressure connection. An additional sealing edge is provided on the outer valve element, between the at least one fuel outlet opening associated with it and the inner valve element.
대표청구항
▼
The invention claim is: 1. In a fuel injection device, for an internal combustion engine with direct fuel injection, having a housing and at least two valve elements comprising: an inner valve element and an outer valve element inserted coaxially to one another into the housing; at least one first
The invention claim is: 1. In a fuel injection device, for an internal combustion engine with direct fuel injection, having a housing and at least two valve elements comprising: an inner valve element and an outer valve element inserted coaxially to one another into the housing; at least one first fuel outlet opening disposed in the housing and associated with the outer valve element; at least one second fuel outer opening disposed in the housing and associated with the inner valve element; a valve seat disposed in the housing which valve seat is engaged and disengaged with the inner valve element and the outer valve element to open and close the associated fuel outlet openings from a high-pressure fuel connection; a first sealing region cooperating with the valve seat and disposed on the outer valve element in a location radially outward from the at least one first fuel outlet opening; and a second sealing region cooperating with the valve seat and disposed on the outer valve element between the at least one first fuel outlet opening and the inner valve element; wherein a gap initially exists following initially assembly of the device, between the second sealing region and the valve seat there-opposing the outer valve element in a closed position, wherein the gap is preferably approximately 1 to 2 μm. 2. In a fuel injection device, for an internal combustion engine with direct fuel injection, having a housing and at least two valve elements comprising: an inner valve element and an outer valve element inserted coaxially to one another into the housing; at least one first fuel outlet opening disposed in the housing and associated with the outer valve element; at least one second fuel outer opening disposed in the housing and associated with the inner valve element; a valve seat disposed in the housing which valve seat is engaged and disengaged with the inner valve element and the outer valve element to open and close the associated fuel outlet openings from a high-pressure fuel connection; a first sealing region cooperating with the valve seat and disposed on the outer valve element in a location radially outward from the at least one first fuel outlet opening; and a second sealing region cooperating with the valve seat and disposed on the outer valve element between the at least one first fuel outlet opening and the inner valve element; wherein the first sealing region is embodied by a sealing edge of a first annular groove extending around the outer valve element, and wherein the first groove has an approximately semicircular cross-section and wherein at least a portion of the semicircular cross-section of the groove is located generally opposing the at least one first fuel opening. 3. The fuel injection device in accordance with claim 1, wherein the first sealing region is embodied on the edge of a first annular groove extending around the outer valve element and further comprising a second elongated groove extending approximately from the first groove to the second sealing region on the outer valve element. 4. The fuel injection device in accordance with claim 2, further comprising a second elongated groove extending approximately from the first groove to the second sealing region on the outer valve element. 5. The fuel injection device in accordance with claim 1, wherein the first sealing region is embodied on the edge of a first annular groove extending around the outer valve element and further comprising a plurality of second elongated grooves distributed over the circumference and all extending in the axial direction approximately from the first groove to the second sealing region. 6. The fuel injection device in accordance with claim 2, further comprising a plurality of second elongated grooves distributed over the circumference and all extending in the axial direction approximately from the first groove to the second sealing region. 7. The fuel injection device in accordance with claim 1, wherein the second sealing region is embodied by a sealing edge of a third radially narrow, deep groove, which third groove is located in the direction toward the first sealing region. 8. The fuel injection device in accordance with claim 2, wherein the second sealing region is embodied by a sealing edge of a third radially narrow, deep groove, which third groove is located in the direction toward the first sealing region. 9. The fuel injection device in accordance with claim 3, wherein the second sealing region is embodied by a sealing edge of a third radially narrow, deep groove, which third groove is located in the direction toward the first sealing region. 10. The fuel injection device in accordance with claim 5, wherein the second sealing region is embodied by a sealing edge of a third radially narrow, deep groove, which third groove is located in the direction toward the first sealing region. 11. The fuel injection device in accordance with claim 1, wherein the second sealing region is embodied on an annular protuberance projecting from the outer valve element. 12. The fuel injection device in accordance with claim 2, wherein the second sealing region is embodied on an annular protuberance projecting from the outer valve element. 13. The fuel injection device in accordance with claim 1, further comprising a guide gap between the two valve elements, and wherein the guide gap is connected to the high-pressure connection via a hydraulic control chamber. 14. The fuel injection device in accordance with claim 2, further comprising a guide gap between the two valve elements, and wherein the guide gap is connected to the high-pressure connection via a hydraulic control chamber. 15. The fuel injection device in accordance with claim 7, further comprising a guide gap between the two valve elements, and wherein the guide gap is connected to the high-pressure connection via a hydraulic control chamber. 16. A method for producing a fuel injection device in accordance with claim 1, comprising the steps of: fabricating the outer valve element such that an initial gap is provided between the second sealing region and its associated valve seat, with the outer valve element in a closed position, wherein the initial gap is preferably of approximately 1 to 2 μm ;and repeatedly actuating the outer valve element and thereby deforming; the first sealing region and/or the valve seat associated with it such that the initial gap between it and the valve seat associated with it becomes less or tends toward zero.
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