Fluids detection sensor and rail, in particular for automotive fuels
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01N-027/416
F02M-055/02
G01N-033/28
F02M-065/00
G01N-027/30
출원번호
US-0006609
(2012-03-23)
등록번호
US-9921179
(2018-03-20)
우선권정보
IT-TO2011A0258 (2011-03-24)
국제출원번호
PCT/IB2012/051408
(2012-03-23)
§371/§102 date
20150424
(20150424)
국제공개번호
WO2012/127454
(2012-09-27)
발명자
/ 주소
Rondano, Matteo
Wagner Main, Luiz
Zorzetto, Mauro
출원인 / 주소
ELTEK S.P.A.
대리인 / 주소
Workman Nydegger
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
A sensor for detecting the properties of the fuel of an internal combustion engine includes at least one pair of internal electrodes (12, 13), extending in an axial direction relative to a further or third external electrode (14) which surrounds them. The invention also relates to a fuel rail (2) to
A sensor for detecting the properties of the fuel of an internal combustion engine includes at least one pair of internal electrodes (12, 13), extending in an axial direction relative to a further or third external electrode (14) which surrounds them. The invention also relates to a fuel rail (2) to which the sensor may be mounted, and a method for detecting the properties of the fluid.
대표청구항▼
1. A sensor for detecting properties of a fluid, the sensor comprising: a first electrode and a second electrode mainly extending along a first direction, the first electrode and the second electrode being spaced apart so as to not be concentrically disposed, anda third electrode at least partially
1. A sensor for detecting properties of a fluid, the sensor comprising: a first electrode and a second electrode mainly extending along a first direction, the first electrode and the second electrode being spaced apart so as to not be concentrically disposed, anda third electrode at least partially arranged around said first and second electrodes, wherein the first and second electrodes have a form of electrically conductive bars and are arranged side by side along an axis of the third electrode,wherein each of the first, second, and third electrodes are in contact with the fluid when the sensor is in operation. 2. The sensor according to claim 1, wherein the first and second electrodes have different lengths. 3. The sensor according to claim 1, wherein the third electrode has a tubular shape that opens in connection with at least one end and/or comprises apertures or holes for the passage of the fluid. 4. The sensor according to claim 1, wherein the cross-section of the third electrode has a shape selected from a group including: circular, polygonal, and lobed. 5. The sensor according to claim 1, wherein the third electrode has a longitudinal aperture extending in one or more of the following ways: axially, circumferentially, helically. 6. The sensor according to claim 1, wherein a capacity of the electrodes is between 10 and 246 pF and/or a resistance of the electrodes is between 1 and 503 kOhm. 7. The sensor according to claim 1, wherein the first and second electrodes are connected in series to each other, whereas the third electrode is connected to a ground. 8. The sensor according to claim 1, wherein either the first or the second electrode can be connected to ground like the third electrode. 9. The sensor according to claim 1, wherein the first and second electrodes are connected to respective detection lines in order to obtain a double measurement. 10. The sensor according to claim 1, comprising means for securing the electrodes to a fuel rail. 11. The sensor according to claim 10, wherein the securing means comprises at least one removable fastener adapted to engage into slots provided in a fuel rail and in a housing adapted to support the electrodes. 12. The sensor according to claim 1, working with low frequency signals applied to the electrodes below 100 Hz. 13. The sensor according to claim 12, working with signals comprised between 5 and 30 Hz. 14. A fuel rail for feeding fuel into an internal combustion engine, the fuel rail comprising: at least one fuel inlet;one or more fuel outlets; anda fuel detection sensor that includes: a first and a second electrode mainly extending along a first direction, the first electrode and the second electrode being spaced apart so as to not be concentrically disposed, anda third electrode at least partially arranged around said first and second electrodes and at least partially bounding an elongated passage having a length, wherein the first and second electrodes have the form of elongated electrically conductive bars that extend longitudinally side by side along at least a portion of the length of the passage of the third electrode, the first and second electrodes being positioned so that when the fluid is disposed within the passage, the fluid directly contacts the first electrode, the second electrode and the third electrode; andfastening means for coupling or securing the fuel detection sensor. 15. The fuel rail according to claim 14, wherein the fastening means is provided in the rail and/or in the sensor and comprises a slot adapted to be removably engaged by a clip. 16. A method for detecting properties of a fluid, using at least one pair of electrodes immersed in the fluid, the method comprising: electrically energizing the at least one pair of electrodes with an electric current or voltage;detecting an electric parameter derived from the energization of the at least one pair of electrodes, anddetermining a characteristic of the fluid depending on said electric parameter, wherein the detection is made on the fluid flowing along at least one portion of a path in which the at least one pair of elongated electrodes extend longitudinally side by side in direct contact with the fluid, the at least one pair of electrodes comprising a first electrode and a second electrode that are spaced apart so as to not be concentrically disposed. 17. The method according to claim 16, wherein the fluid flow is oriented from one end to the other end of the at least one pair of electrodes. 18. The method according to claim 16, wherein the detection is made on flows running along respective opposite paths or along paths which may vary along the at least one pair of electrodes. 19. The method according to claim 16, wherein the phase of electrically energizing the at least one pair of electrodes is carried out with low frequency signals applied to the electrodes below 100 Hz. 20. The method according to claim 19, wherein the signals are comprised between 5 and 30 Hz. 21. The sensor of claim 1, wherein the first electrode, the second electrode and the third electrode are configured to detect at least one of an electric conductivity of the fluid, a dielectric rigidity of the fluid, or a presence or concentration of substances in the fluid. 22. The method of claim 16, further comprising determining at least one of an electric conductivity of the fluid, a dielectric rigidity of the fluid, or a presence or concentration of substances in the fluid. 23. The fuel rail of claim 14, wherein the fuel detection sensor is disposed inside the at least one inlet such that the first electrode, the second electrode and the third electrode are in a path of the fluid and are in contact with the fluid. 24. The fuel rail of claim 14, wherein the fuel detection sensor is in contact with the liquid in order to perform resistive measurements and capacitive measurements using one or more combinations of at least two of the first electrode, the second electrode and the third electrode. 25. A sensor for detecting properties of a fluid, the sensor comprising: a first electrode and a second electrode being spaced apart so as to not be concentrically disposed, anda third electrode at least partially arranged around said first and second electrodes and at least partially bounding an elongated passage having a length, wherein the first and second electrodes have a form of elongated electrically conductive bars that extend longitudinally side by side along a least a portion of the length of the passage of the third electrode,the first and second electrodes being positioned so that when the fluid is disposed within the passage, the fluid directly contacts the first electrode, the second electrode and the third electrode. 26. The sensor of claim 25, wherein the first electrode, the second electrode and the third electrode are positioned so that when an imaginary plane passes through the third electrode normal to a longitudinal axis thereof, the imaginary plane also passes through the first electrode and the second electrode.
Murphy J. Brian ; Brauninger John M. ; McHardy John ; Megerle Clifford A. ; Townsend Carl W., Dielectric mixture composition sensor with compensation for mixture electrical conductivity.
Henderson, Colin; Lang, Uwe; Hother, Stefan; Bookbinder, Steven; Köhler, Thomas, Method for measuring the volume flow of electrically conductive liquids through a vessel.
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