WO2000063563A1 - Procede et dispositif pour le traitement d'un fluide hydraulique - Google Patents

Procede et dispositif pour le traitement d'un fluide hydraulique Download PDF

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Publication number
WO2000063563A1
WO2000063563A1 PCT/DE2000/001145 DE0001145W WO0063563A1 WO 2000063563 A1 WO2000063563 A1 WO 2000063563A1 DE 0001145 W DE0001145 W DE 0001145W WO 0063563 A1 WO0063563 A1 WO 0063563A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
pressure medium
time
vacuum
measured
Prior art date
Application number
PCT/DE2000/001145
Other languages
German (de)
English (en)
Inventor
Klaus Pierzyna
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2000063563A1 publication Critical patent/WO2000063563A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0063—Regulation, control including valves and floats

Definitions

  • the invention relates to a method and a device for treating a pressure medium according to the preambles of the independent claims.
  • pressure medium such as hydraulic oil, brake fluid or the like
  • dissolved foreign components such as air and / or water can represent a potential hazard.
  • Brake fluid from motor vehicles or in any other pressure medium that is important for safety should not exceed certain values. It is therefore desirable to have a method and apparatus create with which or with which the acquisition of external shares would be feasible.
  • a device 10 for treating a pressure medium which serves to detect the foreign components such as air and / or water in a pressure medium, such as hydraulic oil or brake fluid.
  • a pressure medium such as hydraulic oil or brake fluid.
  • the device 10 has a controller 12, which contains, for example, a customary programmable logic controller (PLC) or a computer. Programs and data can be stored in the controller 12, and there are possibilities for data input and output.
  • PLC programmable logic controller
  • the controller 12 ideally has a power section with which external devices can be controlled and supplied with energy.
  • the controller 12 is operationally connected to a vacuum pump 14 with a silencer 15, a vacuum switch 16, a level switch 18, a ventilation valve 20 and a shut-off valve 22.
  • the ventilation valve 20 and the shut-off valve 22 are each designed as a directional valve with a passage position D and a blocking position S.
  • the controller 12 controls the vacuum pump 14, the ventilation valve 20 and the shut-off valve 22.
  • the controller 12 receives signals from the vacuum switch 16 and the level switch 18.
  • the device 10 has a test container 24 in which a pressure medium 26 is located.
  • the test container 24 is connected via a line 14 ⁇ , which is connected in the upper region of the test container 24 and to which the vacuum switch 16 can detect a vacuum with which Vacuum pump 14 connected.
  • the vacuum switch 16 can also be connected at another location, such as directly to the test container 24.
  • the vacuum switch 16 sends a signal to the controller 12 at a certain pressure.
  • a pressure sensor can also be provided, which sends a signal corresponding to the measured pressure to the controller 12. It is important that a device for detecting a vacuum is provided which signals this state to the controller 12.
  • test container 24 can be designed as a cylinder and a piston is arranged instead of the vacuum pump 14. If there is a pressure medium in the cylinder and the cylinder is closed, the volume in the cylinder can be increased by pulling the piston, which creates a negative pressure, which has the same effect.
  • the level switch 18 extends into the test container 24, as a result of which the amount of pressure medium 26 in the test container can be determined. As can be seen, the
  • Test container 24 contained amount of pressure medium 26 edoch can also be detected by other known devices. This can be done, for example, by measuring the weight. Alternatively, the volume of the pressure medium 26 flowing in the test container 24 can also be measured.
  • the ventilation valve 20, to which a filter 28 is connected, is connected via a line 20 ⁇ to the test container 24 m in the upper region thereof. At the lower area of the test container 24, the latter is connected to the via a line 22 ' Shut-off valve 22 connected, which in turn leads to a pressure medium reservoir 30.
  • the principle according to which the device 10 operates is based on the fact that air released in a vacuum or at least at a reduced pressure in the pressure medium 26 is discharged. Furthermore, water dissolved in the pressure medium 26 is eliminated as water vapor, at least at room temperature (+ 20 ° C.). Both elimination processes take place simultaneously. Other foreign components soluble in the pressure medium 26 also separate from the pressure medium 26 under vacuum. The duration of the elimination process depends on the amount of external components. If no foreign components such as water and / or air are present and therefore cannot be eliminated, the vacuum builds up in the shortest possible time. Depending on the amount of foreign components, the time until the vacuum is reached increases.
  • the values mentioned are stored in the controller 12.
  • the controller 12 also controls the method, whereby automation of the method for detecting the foreign components in a pressure medium is possible.
  • the pressure or the vacuum variable m mbar is optionally detected variably by means of a pressure sensor.
  • the time measurement as well as the evaluation and the reaction sequences are carried out or defined in the controller 12 and transmitted to higher-level function elements (man / machine).
  • the ventilation valve 20 When the foreign components in the pressure medium 26 are detected, the ventilation valve 20 is first closed and the shut-off valve 22 is opened by a signal from the controller 12. The control unit then switches on the vacuum pump 14. By generating a negative pressure, pressure medium 26 passes from the pressure medium reservoir 30 through the line 22 from the pressure medium container 24. When the defined pressure medium quantity V26 is reached, this is signaled to the controller 12 by the level switch 18. The shut-off valve 22 is now closed. This can be done by a signal from the
  • Control 12 take place or by the level switch 18. Now the vacuum or negative pressure is built up, since the vacuum pump 14 continues to work.
  • the shut-off valve 22 closes, the measurement of the time tm of the controller 12 starts. If the pressure p set at the vacuum switch of, for example, 300mbar or the set vacuum is reached, this is signaled to the controller 12 and the time t is stopped. If a pressure sensor is used, the pressure p or the vacuum size is stored in the controller 12. The time t is then stopped when the set pressure p is reached. The vacuum pump 14 can be switched off. The stored time window tF and the time t are now compared.
  • the state of the pressure medium is 26 m order, ie there are not too many foreign components in the Pressure medium 26. If the measured time t is greater than the stored time tF, there were too many foreign components in the pressure medium 26, so that the measurement took longer. The pressure medium 26 in the pressure medium reservoir 30 must therefore be processed.
  • the test container 24 is present, in which the pressure p, in particular the vacuum, reduced compared to the ambient pressure can be generated and that a device for detecting the pressure p is provided. Furthermore, it is advantageous for automation that the controller 12 is provided, with which the time t for reaching the pressure p can be measured. This is supported by the fact that at least the value tF is stored in the controller 12 for comparison with the measured time t. The results can be saved and / or output.
  • the process is initially the same. If the time t is measured, it is stored in the controller 12 and / or output. The ventilation valve 20 is opened and closed again. As a result, the pressure p in the test container 24 rises again to ambient pressure. Now the vacuum pump 14 is switched on again and the time t2 until the stored pressure p is reached a second time Times measured. Existing foreign components were at least partially removed by the first generation of the vacuum. The time t2 is therefore definitely less than the time t. In theory, it is possible that time t2 is equal to time t. However, this is only the case if the pressure medium 26 is ideal and no foreign components are dissolved in it from the outset, but this does not actually occur in practice.
  • Temperature dependence is less, because the temperature has an influence on the time when the vacuum is generated. If the temperature is higher, the time until the vacuum is reached is less.
  • an automated detection of the foreign components in a pressure medium 26 over time is possible in a simple manner within predetermined tolerances.
  • the entire batch can be concluded.
  • the measured values can be saved, output and documented. This is particularly advantageous in the case of quality standards, which are aimed, among other things, at documenting processes.
  • the described methods can be used in stationary or mobile devices 10.
  • pressure media such as hydraulic oil can be tested before they are used.
  • the device 10 can also be used in a corresponding size in motor vehicles.
  • the condition of the brake fluid can be checked.
  • the time until the brake fluid is changed may be extended, since this no longer has to take place in fixed cycles.
  • the use of a cylinder with a piston is suitable for generating the vacuum.
  • the controller 12 can be implemented in a hybrid construction.
  • the device can be used in motor vehicles, such as trucks, passenger cars or motorcycles, possibly without detecting the external components, to remove external components such as water and / or air from the pressure medium, such as hydraulic oil or in particular from the brake fluid.
  • the pressure medium such as hydraulic oil or in particular from the brake fluid.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif (10) pour le traitement d'un fluide hydraulique (26), selon lesquels des matières étrangères dissoutes dans le fluide hydraulique (26) sont extraites par production d'une pression (p) réduite par rapport à la pression ambiante, notamment d'un vide. Le temps nécessaire (t) pour atteindre la pression (p) est mesuré et comparé à une valeur prédéterminée (tF, DELTA t). La valeur prédéterminée (tF, DELTA t) correspond au temps se rapportant à l'établissement du vide dans le cas d'un fluide hydraulique (26) exempt de matières étrangères. Ceci permet de tirer des conclusions quant à la quantité de matières étrangères et, de ce fait, à la qualité du fluide hydraulique (26).
PCT/DE2000/001145 1999-04-19 2000-04-12 Procede et dispositif pour le traitement d'un fluide hydraulique WO2000063563A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19917636.1 1999-04-19
DE1999117636 DE19917636B4 (de) 1999-04-19 1999-04-19 Verfahren und Vorrichtung zur Behandlung eines Druckmittels

Publications (1)

Publication Number Publication Date
WO2000063563A1 true WO2000063563A1 (fr) 2000-10-26

Family

ID=7905079

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/001145 WO2000063563A1 (fr) 1999-04-19 2000-04-12 Procede et dispositif pour le traitement d'un fluide hydraulique

Country Status (2)

Country Link
DE (1) DE19917636B4 (fr)
WO (1) WO2000063563A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3636331A1 (fr) * 2018-10-11 2020-04-15 C.C. Jensen A/S Système et procédé de séparation de l'air et de liquide

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3960203B2 (ja) * 2002-11-06 2007-08-15 株式会社アドヴィックス 液圧装置の液圧回路内混入エア量過大警報装置
DE102012004881A1 (de) * 2012-03-10 2013-09-12 Hydac Filtertechnik Gmbh Verfahren und Vorrichtung zur Abtrennung von Gas aus einem strömungsfähigen Medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357824A (en) * 1980-09-15 1982-11-09 General Electric Company Method for determining volatilization rates of dissolved volatiles from solid waste materials
DE3910242A1 (de) * 1989-03-30 1990-10-11 Teves Gmbh Alfred Verfahren und vorrichtung zur messung oder ueberwachung der beschaffenheit einer fluessigkeit
US5290340A (en) * 1990-12-04 1994-03-01 Thermo Separation Products (California) Inc. Methods and apparatus for degassing a liquid
EP0607097A1 (fr) * 1993-01-12 1994-07-20 Valinox Procédé de détection de la présence d'un liquide à l'intérieur d'une capsule remplie d'une poudre métallique
US5345808A (en) * 1993-08-30 1994-09-13 Sigworth Geoffrey K Gas analyzer for molten metals
WO1994028316A1 (fr) * 1993-05-25 1994-12-08 Ingvast Haakan Procede et dispositif pour systeme hydraulique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4967321A (en) * 1988-11-14 1990-10-30 I & K Trading Company Flashlight wand
DE19619028C2 (de) * 1996-05-11 1998-03-19 Daimler Benz Aerospace Airbus Vorrichtung zum Reinigen einer Hydraulikflüssigkeit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4357824A (en) * 1980-09-15 1982-11-09 General Electric Company Method for determining volatilization rates of dissolved volatiles from solid waste materials
DE3910242A1 (de) * 1989-03-30 1990-10-11 Teves Gmbh Alfred Verfahren und vorrichtung zur messung oder ueberwachung der beschaffenheit einer fluessigkeit
US5290340A (en) * 1990-12-04 1994-03-01 Thermo Separation Products (California) Inc. Methods and apparatus for degassing a liquid
EP0607097A1 (fr) * 1993-01-12 1994-07-20 Valinox Procédé de détection de la présence d'un liquide à l'intérieur d'une capsule remplie d'une poudre métallique
WO1994028316A1 (fr) * 1993-05-25 1994-12-08 Ingvast Haakan Procede et dispositif pour systeme hydraulique
US5345808A (en) * 1993-08-30 1994-09-13 Sigworth Geoffrey K Gas analyzer for molten metals

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3636331A1 (fr) * 2018-10-11 2020-04-15 C.C. Jensen A/S Système et procédé de séparation de l'air et de liquide
WO2020074703A1 (fr) * 2018-10-11 2020-04-16 C.C. Jensen A/S Système et procédé de séparation de l'air d'un liquide
CN113164834A (zh) * 2018-10-11 2021-07-23 C·C·詹森有限公司 从液体中分离空气的系统和方法
CN113164834B (zh) * 2018-10-11 2023-06-20 C·C·詹森有限公司 从液体中分离空气的系统和方法
JP7475339B2 (ja) 2018-10-11 2024-04-26 シー． シー． ジェンセン エー／エス 液体から空気を分離するシステム及び方法

Also Published As

Publication number Publication date
DE19917636A1 (de) 2000-11-02
DE19917636B4 (de) 2005-07-28

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