IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0203090
(2001-12-06)
|
우선권정보 |
DE-0060477 (2000-12-06) |
국제출원번호 |
PCT/DE01/04552
(2002-10-25)
|
§371/§102 date |
20021025
(20021025)
|
국제공개번호 |
WO02/46606
(2002-06-13)
|
발명자
/ 주소 |
- Schoeffel, Eberhard
- Braun, Hans
- Lafrenz, Fabian
- Seidel, Josef
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
4 |
초록
▼
A device is used for measuring the injection quantity of injection nozzles. It includes a measuring chamber to which the injection nozzle can be coupled. In addition, a detection device is provided, which detects a state change of the testing fluid in the measuring chamber due to an injection by the
A device is used for measuring the injection quantity of injection nozzles. It includes a measuring chamber to which the injection nozzle can be coupled. In addition, a detection device is provided, which detects a state change of the testing fluid in the measuring chamber due to an injection by the injection nozzle. In order to be able to measure the injection quantity without wear and in a highly precise manner, the invention provides that the detection device has a capacitor, whose one electrode is comprised of an electrically conductive fluid, which is at least partially contained in a volume connected to the measuring chamber. The processing unit is connected to the capacitor in such a way that it can detect a change in its capacitance, which is produced by a movement of the electrically conductive fluid.
대표청구항
▼
1. A device for measuring the injection quantity of injection nozzles (30), in particular for motor vehicles and in particular in production testing, the device comprisingat least one measuring chamber (22) that is at least partially filled with a testing fluid (60), a coupling device (28) that can
1. A device for measuring the injection quantity of injection nozzles (30), in particular for motor vehicles and in particular in production testing, the device comprisingat least one measuring chamber (22) that is at least partially filled with a testing fluid (60), a coupling device (28) that can couple at least one injection nozzle (30) to the measuring chamber (22) in a pressure-tight manner, a detection device which detects a state change of the testing fluid (60) in the measuring chamber (22) at least intermittently during an injection by the injection nozzle (30), and a processing unit (58), which, based on the signal from the detection device, determines an injection quantity that corresponds to the state change, the detection device including a capacitor whose one electrode is comprised of an electrically conductive fluid (62), which is at least partially contained in a volume connected to the measuring chamber (22), and the processing unit (58) being connected to the capacitor in such a way that it can detect a change in its capacitance, which is produced by a movement of the electrically conductive fluid (62). 2. The device according to claim 1 further comprising at least one elongated electrical conductor (1 to 19) disposed in the volume so that it extends in its longitudinal direction through a moving boundary surface (64) of the electrically conductive fluid (62); the electrical conductor (1 to 19) being insulated in relation to the outside by means of a dielectric (32) and thus constituting a stationary electrode of the capacitor.3. The device according to claim 1 further comprising a flow tranquilizer between the injection nozzle and the moving boundary surface (64), the flow tranquilizer having a porous body, preferably a sintered body.4. The device according to claim 2 further comprising a flow tranquilizer between the injection nozzle and the moving boundary surface (64), the flow tranquilizer having a porous body, preferably a sintered body.5. The device according to claim 1 wherein the volume constituted by the electrically conductive fluid (62) is at least partially bounded by a prestressed wall (42), in particular by a pneumatic spring (44).6. The device according to claim 2 wherein the volume constituted by the electrically conductive fluid (62) is at least partially bounded by a prestressed wall (42), in particular by a pneumatic spring (44).7. The device according to claim 3 wherein the volume constituted by the electrically conductive fluid (62) is at least partially bounded by a prestressed wall (42), in particular by a pneumatic spring (44).8. The device according to claim 5 wherein the pneumatic spring (44) has a diaphragm (42), which is acted on by a gas on one side.9. The device according to claim 1 having a number of stationary electrodes (1 to 19) that are disposed essentially parallel to one another and connected in parallel.10. The device according to claim 2 having a number of stationary electrodes (1 to 19) that are disposed essentially parallel to one another and connected in parallel.11. The device according to claim 1 wherein the volume is essentially circular in cross section.12. The device according to claim 11 wherein at least part of the stationary electrodes (1 to 19), in terms of the radial direction, are disposed in the centroids of surface areas that are essentially the same size.13. The device according to claim 1 wherein the stationary electrodes (1 to 19) have a dielectric coating (32) on the outside, which preferably contains Teflon ?.14. The device according to claim 12 wherein the stationary electrodes (1 to 19) have a dielectric coating (32) on the outside, which preferably contains Teflon ?.15. The device according to claim 1 wherein the testing fluid is oil (60) and the electrically conductive fluid is water, in particular saline water (62).16. The device according to claim 1 wherein the boundary surface (64) of the electrically conductive fluid (62) directly adjoins the testing fluid (60).17. The device according to claim 5 wherein the boundary surface (64) of the electrically conductive fluid (62) directly adjoins the testing fluid (60).18. The device according to claim 1 further comprising a housing (24), which at least partially contains the volume with the electrically conductive fluid (62), and wherein the housing (24) contains an electrically conductive material, which is electrically connected to the processing unit (58), and the stationary electrode (1 to 19) is insulated in relation to the housing.19. The device according to claim 2 further comprising a housing (24), which at least partially contains the volume with the electrically conductive fluid (62), and wherein the housing (24) contains an electrically conductive material, which is electrically connected to the processing unit (58), and the stationary electrode (1 to 19) is insulated in relation to the housing.20. A method for measuring the injection quantity of injection nozzles (30), particularly for motor vehicles and particularly in production testing, comprising,coupling at least one injection nozzle (30) in a pressure-tight manner to a measuring chamber (22) that is at least partially filled with a testing fluid (60), detecting the state change of the testing fluid (60) due to an injection of the injection nozzle (30) into the measuring chamber (22) determining the injection quantity based on the state change, the state change of the testing fluid (60) resulting in a movement of an electrically conductive fluid (62), which in turn constitutes an electrode of a capacitor, and detecting the change in the capacitance of the capacitor is detected, which is produced by a movement of the boundary surface (64) of the electrically conductive fluid (62).
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