Dosing device for fluids, especially a motor vehicle injection valve
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B05B-001/30
F02M-051/00
F16K-031/02
출원번호
US-0967384
(2004-10-18)
등록번호
US-7309032
(2007-12-18)
우선권정보
DE-102 17 882(2002-04-22)
발명자
/ 주소
Fischer,Bernhard
Gottlieb,Bernhard
Kappel,Andreas
Ulivieri,Enrico
출원인 / 주소
Siemens Aktiengesellschaft
대리인 / 주소
Baker Botts L.L.P.
인용정보
피인용 횟수 :
12인용 특허 :
11
초록▼
An actuator (4) is connected, on one side, to a valve needle (3), and on the opposite side, to a hydraulic piston (6) pertaining to a hydraulic length compensator. A working chamber (5) is divided by a tight separating membrane (9), into an actuator chamber (10) containing the actuator (4) and a flu
An actuator (4) is connected, on one side, to a valve needle (3), and on the opposite side, to a hydraulic piston (6) pertaining to a hydraulic length compensator. A working chamber (5) is divided by a tight separating membrane (9), into an actuator chamber (10) containing the actuator (4) and a fluid chamber (11) which can be filled with the fluid to be dosed in a pressurized manner while the actuator chamber (10) and the hydraulic chamber (7) are filled with a hydraulic fluid. A base pressure can be produced in the hydraulic fluid by means of the pressure of the fluid to be dosed, which is transmitted through the separating membrane (9).
대표청구항▼
We claim: 1. A dosing device for dosing a fluid under pressure being dosed, comprising: a housing with a dosing aperture which can be controlled by displacement of a valve needle, an electromechanical actuator, whose length can be changed in the axial direction, which is located inside a working ch
We claim: 1. A dosing device for dosing a fluid under pressure being dosed, comprising: a housing with a dosing aperture which can be controlled by displacement of a valve needle, an electromechanical actuator, whose length can be changed in the axial direction, which is located inside a working chamber of the housing, and whose two end faces are connected one to the valve needle and the other to an axially movable hydraulic piston, a hydraulic chamber hydraulically connected in a throttled manner to the working chamber by means of a first fit between the hydraulic piston and the housing, with the first fit being embodied in such a way that the hydraulic piston will retain its position relative to the housing if there is a rapid change in the length of the actuator, wherein the working chamber and the hydraulic chamber can be filled with a working fluid, the working chamber is divided by a hermetically tight separating membrane into an actuator chamber containing the actuator and a fluid chamber, the fluid chamber can be filled under pressure with the fluid being dosed, while the actuator chamber and the hydraulic chamber are filled with a hydraulic fluid as the working fluid, and wherein a base pressure can be produced in the hydraulic fluid by means of the pressure of the fluid being dosed, said pressure being transmitted through the separating membrane, the valve needle is routed through two narrow needle ducts axially in the housing in the area between the fluid chamber and the dosing aperture, the valve needle has flattened sections in the area of the needle duct on the side of the dosing aperture so that the fluid being dosed, which is supplied from a fluid feed, can reach the dosing aperture unimpeded, the needle duct on the fluid chamber side is embodied so narrowly as to allow either no hydraulic link or only a highly throttling hydraulic link between the needle duct on the side of the dosing aperture and the fluid chamber, and the fluid being dosed can be supplied for the purpose of pressure-filling the fluid chamber via a branch from the fluid feed to said fluid chamber. 2. The dosing device according to claim 1, wherein an axially soft separating membrane is provided which is connected hermetically tightly at its inside diameter to the valve needle and hermetically tightly at its outside diameter to an inner wall of the working chamber. 3. The dosing device according to claim 2, wherein the separating membrane is embodied by means of a double metal bellows arrangement. 4. The dosing device according to claim 1, wherein the actuator is located inside a metal bellows which is flexible in the axial direction and is secured in a sealed manner in the area of the end face of the actuator on the side of the valve needle and on the hydraulic piston, and which divides the actuator chamber into an inner actuator chamber and an outer actuator chamber filled with hydraulic fluid. 5. The dosing device according to claim 1, wherein the actuator is inserted into a Bourdon spring and is compressively pre-stressed by this. 6. A dosing device for dosing a fluid under pressure being dosed, comprising: a housing with a dosing aperture which can be controlled by displacement of a valve needle, an electromechanical actuator, whose length can be changed in the axial direction, which is located inside a working chamber of the housing, and whose two end faces are connected one to the valve needle and the other to an axially movable hydraulic piston, a hydraulic chamber hydraulically connected in a throttled manner to the working chamber by means of a first fit between the hydraulic piston and the housing, with the first fit being embodied in such a way that the hydraulic piston will retain its position relative to the housing if there is a rapid change in the length of the actuator, wherein the working chamber and the hydraulic chamber can be filled with a working fluid, the working chamber is divided by a hermetically tight separating membrane into an actuator chamber containing the actuator and a fluid chamber, the fluid chamber can be filled under pressure with the fluid being dosed, while the actuator chamber and the hydraulic chamber are filled with a hydraulic fluid as the working fluid, and wherein a base pressure can be produced in the hydraulic fluid by means of the pressure of the fluid being dosed, said pressure being transmitted through the separating membrane wherein the actuator is located inside a metal bellows which is flexible in the axial direction and is secured in a sealed manner in the area of the end face of the actuator on the side of the valve needle and on the hydraulic piston, and which divides the actuator chamber into an inner actuator chamber and an outer actuator chamber filled with hydraulic fluid the inner actuator chamber is also filled with hydraulic fluid. 7. The dosing device according to claim 6, wherein the actuator is inserted into a Bourdon spring and is compressively pre-stressed by this. 8. The dosing device according to claim 6, wherein the valve needle is routed through two narrow needle ducts axially in the housing in the area between the fluid chamber and the dosing aperture. 9. The dosing device according to claim 6, wherein the valve needle has flattened sections in the area of a needle duct on a side of the dosing aperture so that the fluid being dosed, which is supplied from a fluid feed, can reach the dosing aperture unimpeded. 10. The dosing device according to claim 6, wherein a needle duct on the fluid chamber side is embodied so narrowly as to allow either no hydraulic link or only a highly throttling hydraulic link between a needle duct on the side of the dosing aperture and the fluid chamber. 11. The dosing device according to claim 6, wherein the fluid being dosed can be supplied for the purpose of pressure-filling the fluid chamber via a branch from a fluid feed to said fluid chamber. 12. A dosing device for dosing a fluid under pressure being dosed, comprising: a housing comprising a dosing aperture which can be controlled by displacement of a valve needle, and a working chamber which is divided by a hermetically tight separating membrane into an actuator chamber filled with a hydraulic fluid and a fluid chamber which can be filled under pressure with a working fluid being dosed, wherein a base pressure can be produced in the hydraulic fluid by means of the pressure of the fluid being dosed, said pressure being transmitted through the separating membrane; an electromechanical actuator inside the actuator chamber, whose length can be changed in the axial direction, and whose first end face is connected to the valve needle and whose second end face to an axially movable hydraulic piston, and a hydraulic chamber which can be filled with the hydraulic fluid hydraulically connected in a throttled manner to the working chamber by means of a first fit between the hydraulic piston and the housing, with the first fit being embodied in such a way that the hydraulic piston will retain its position relative to the housing if there is a rapid change in the length of the actuator, wherein the valve needle is routed through two narrow needle ducts axially in the housing in the area between the fluid chamber and the dosing aperture. 13. The dosing device according to claim 12, Wherein the separating membrane is axially soft and is connected hermetically tightly at its inside diameter to the valve needle and hermetically tightly at its outside diameter to the inner wall of the working chamber. 14. The dosing device according to claim 13, wherein the separating membrane is embodied by means of a double metal bellows arrangement. 15. The dosing device according to claim 12, wherein the valve needle has flattened sections in the area of the needle duct on the side of the dosing aperture so that the fluid being dosed, which is supplied from a fluid feed, can reach the dosing aperture unimpeded. 16. The dosing device according to claim 15, wherein the needle duct on the fluid chamber side is embodied so narrowly as to allow either no hydraulic link or only a highly throttling hydraulic link between the needle duct on the side of the dosing aperture and the fluid chamber. 17. The dosing device according to claim 16, wherein the fluid being dosed can be supplied for the purpose of pressure-filling the fluid chamber via a branch from the fluid feed to said fluid chamber. 18. The dosing device according to claim 12, wherein the actuator is located inside a metal bellows which is flexible in the axial direction and is secured in a sealed manner in the area of the end face of the actuator on the side of the valve needle and on the hydraulic piston, and which divides the actuator chamber into an inner actuator chamber and an outer actuator chamber filled with hydraulic fluid. 19. The dosing device according to claim 12, wherein the actuator is inserted into a Bourdon spring and is compressively pre-stressed by this. 20. A dosing device for dosing a fluid under pressure being dosed, comprising: a housing comprising a dosing aperture which can be controlled by displacement of a valve needle, and a working chamber which is divided by a hermetically tight separating membrane into an actuator chamber filled with a hydraulic fluid and a fluid chamber which can be filled under pressure with a working fluid being dosed, wherein a base pressure can be produced in the hydraulic fluid by means of the pressure of the fluid being dosed, said pressure being transmitted through the separating membrane; an electromechanical actuator inside the actuator chamber, whose length can be changed in the axial direction, and whose first end face is connected to the valve needle and whose second end face to an axially movable hydraulic piston, and a hydraulic chamber which can be filled with the hydraulic fluid hydraulically connected in a throttled manner to the working chamber by means of a first fit between the hydraulic piston and the housing, with the first fit being embodied in such a way that the hydraulic piston will retain its position relative to the housing if there is a rapid change in the length of the actuator, wherein the actuator is located inside a metal bellows which is flexible in the axial direction and is secured in a sealed manner in the area of the end face of the actuator on the side of the valve needle and on the hydraulic piston, and which divides the actuator chamber into an inner actuator chamber and an outer actuator chamber filled with hydraulic fluid, wherein the inner actuator chamber is also filled with hydraulic fluid.
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이 특허에 인용된 특허 (11)
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