Device for measuring time-resolved volumetric flow processes
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0563955
(2004-07-06)
|
등록번호 |
US-7254993
(2007-08-14)
|
우선권정보 |
DE-103 31 228(2003-07-10) |
국제출원번호 |
PCT/EP04/007353
(2004-07-06)
|
§371/§102 date |
20060110
(20060110)
|
국제공개번호 |
WO05/005935
(2005-01-20)
|
발명자
/ 주소 |
- Metzler,Rainer
- Werner,Manfred
- Kammerstetter,Heribert
|
출원인 / 주소 |
- AVL Pierburg Instruments Flow Technology GmbH
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
The invention relates to a device for measuring time-resolved volumetric throughflow processes, especially injection process in internal combustion engines, having a translational volume difference sensor having a piston disposed in a measuring compartment and a detection device detecting the excurs
The invention relates to a device for measuring time-resolved volumetric throughflow processes, especially injection process in internal combustion engines, having a translational volume difference sensor having a piston disposed in a measuring compartment and a detection device detecting the excursion of the piston, the detection device being linked with an evaluation unit. According to the invention, a pressure sensor is mounted in the measuring compartment in addition to the detection device which detects the excursion of the piston. The signal of the detection device corresponding to the excursion of the piston can be better evaluated as the compressivity of the fluid in the measuring compartment can be taken into consideration for the calculation of the amount to be injected. The inventive device allows for a highly time-resolved representation of throughflow processes so that both overall amount and exact course of the throughflow can be represented and evaluated.
대표청구항
▼
What is claimed is: 1. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines, comprising: a translatory volume difference sensor having a piston arranged in a measuring chamber and a data acquisition device that senses a displacement of t
What is claimed is: 1. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines, comprising: a translatory volume difference sensor having a piston arranged in a measuring chamber and a data acquisition device that senses a displacement of the piston; an evaluating unit connected to the data acquisition device; and a pressure sensor disposed in the measuring chamber and connected to the evaluating unit such that by means of measured values of the pressure sensor, a correction of a flow amount ascertained from the measured values of the data acquisition device takes place in the evaluating unit, wherein the displacement of the piston is formed by superimposing a portion with constant speed in an opposite direction to a displacement direction during an injection as well as a discontinuous portion during an injection process. 2. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 1, wherein said data acquisition device comprises a sensor to produce a voltage representing a measurement for said displacement of said piston and that continuously senses said displacement of said piston in said measuring chamber. 3. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 1, wherein said piston has a specific weight the same as that of a fluid to be measured. 4. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 1, further comprising a temperature sensor disposed in said measuring chamber and connected to said evaluating unit. 5. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 1, wherein said translatory volume difference sensor comprises a sensor selected from the group consisting of an optical sensor, an inductive sensor, and a sensor that works on an eddy current principle. 6. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 1, wherein the device for measuring is connected between at least one fuel injection valve and a delay time tube. 7. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines, comprising: a translatory volume difference sensor having a piston arranged in a measuring chamber and a data acquisition device that senses a displacement of the piston; an evaluating unit connected to the data acquisition device; and a pressure sensor disposed in the measuring chamber and connected to the evaluating unit such that by means of measured values of the pressure sensor, a correction of a flow amount ascertained from the measured values of the data acquisition device takes place in the evaluating unit, wherein the translatory volume difference sensor further comprises a rotary displacer, the displacer is driven via a motor depending on an adjacent volume difference, the measuring chamber is disposed in an intake duct that opens into an outlet duct behind, in the flow direction, the translatory volume difference sensor, and the rotary displacer is arranged in a bypass line to the translatory volume difference sensor, whereby the rotary displacer is controlled such that during one work cycle the speed of the displacer is constant and essentially corresponds to the average flow over the entire work cycle. 8. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 7, wherein said rotary displacer comprises a gear pump. 9. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 7, wherein a hydraulic length from a fuel injection valve to an intake side of said rotary displacer is equal to a hydraulic length to an outlet side of the rotary displacer. 10. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 7 wherein said data acquisition device comprises a sensor to produce a voltage representing a measurement for said displacement of said piston and that continuously senses said displacement of said piston in said measuring chamber. 11. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 7, wherein said piston has a specific weight the same as that of a fluid to be measured. 12. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 7, further comprising a temperature sensor disposed in said measuring chamber and connected to said evaluating unit. 13. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 7, wherein said translatory volume difference sensor comprises a sensor selected from the group consisting of an optical sensor, an inductive sensor, and a sensor that works on an eddy current principle. 14. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 7, wherein said motor comprises a servo motor having a movement sensor connected to said evaluating unit and to an electronic control unit, whereby a signal of the movement sensor represents a measurement for a speed of said rotary displacer. 15. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines according to claim 14, wherein said movement sensor comprises a pulse generator disk. 16. Device for measuring time-resolved volumetric flow processes of injection processes in internal combustion engines, comprising: a translatory volume difference sensor having a piston arranged in a measuring chamber and a data acquisition device that senses a displacement of the piston; an evaluating unit connected to the data acquisition device; and a pressure sensor disposed in the measuring chamber and connected to the evaluating unit such that by means of measured values of the pressure sensor, a correction of a flow amount ascertained from the measured values of the data acquisition device takes place in the evaluating unit, wherein the piston has a specific weight the same as that of a fluid to be measured.
이 특허에 인용된 특허 (4)
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Abt, Jurgen; Handtmann, Dieter; Schwartz, Reinhard; Wocher, Bertold, Arrangement for measuring injection quantities.
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Unger,Joachim; Von Huelsen,Wolfram; Bolle,Hermann; Bindel,Ralf; Haas,Ralf; Wolf,Dirk, Method, computer program and device for measuring the injection quantity of injection nozzles, especially for motor vehicles.
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Schoeffel, Eberhard; Braun, Hans; Seidel, Josef, Method, computer program, and device for measuring the amount injected by an injection system.
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Krueger William R., Precise fuel flow measurement with modified fluid control valve.
이 특허를 인용한 특허 (4)
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Derschmidt, Otfried, Flowmeter having pressure difference sensor in parallel with displacement meter.
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Sandmann,Nils; Takahashi,Noboru; Trombley,Douglas E.; Allen,Jeffrey J.; Mueller,Dietmar; Wagner,Thomas; Ichimasa,Toshio; Torii,Yoshiki, Method to detect a contaminated fuel injector.
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Kammerstetter, Heribert; Metzler, Rainer; Werner, Manfred, System and method for measuring injection processes.
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Kammerstetter, Heribert; Berger, Christian Thomas; Derschmidt, Otfried; Pross, Manfred; Duerrwaechter, Martin; Breitwieser, Herwig; Bernhard, Othmar, System for measuring temporally resolved through-flow processes of fluids.
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