WO1990002083A1 - Procede et appareil de remplissage de systemes hydrauliques - Google Patents

Procede et appareil de remplissage de systemes hydrauliques Download PDF

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Publication number
WO1990002083A1
WO1990002083A1 PCT/US1989/003751 US8903751W WO9002083A1 WO 1990002083 A1 WO1990002083 A1 WO 1990002083A1 US 8903751 W US8903751 W US 8903751W WO 9002083 A1 WO9002083 A1 WO 9002083A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
vessel
hydraulic
supply
dry gas
Prior art date
Application number
PCT/US1989/003751
Other languages
English (en)
Inventor
Arthur Koerner
Original Assignee
Arthur Koerner
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 Arthur Koerner filed Critical Arthur Koerner
Publication of WO1990002083A1 publication Critical patent/WO1990002083A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • B60T17/222—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems by filling or bleeding of hydraulic systems

Definitions

  • This invention relates to a method and apparatus for filling hydraulic systems such as brake systems with fluid and particularly to such method and apparatus which exclude water and air from the fluid during the filling operation.
  • Vehicle brake systems as well as other hydraulic systems require brake or hydraulic fluid which is free of entrained air bubbles and water vapor. Both of these substances, if present in the system, deteriorate the quality of the fluid by lowering the boiling point and increasing the compressibility of the fluid. This condition causes spongy operation thereby preventing the desired quick and firm response to an input force.
  • Atmospheric air is the source of humidity and water as well as air bubbles.
  • the fluid, particularly brake fluid is hygroscopic, thus tending to absorb moisture from the ambient air.
  • To prevent air and water from entering the system during manufacture it is customary to take special care in filling the system. In particular, it is known to evacuate the system to remove air and water prior to filling with the fluid.
  • 3,339,401 to Peters shows a brake fill machine which has an overhead mounted portable coupling device coacting with a vehicle chassis on a production line.
  • a vacuum source evacuates the brake system
  • a brake fluid supply fills the system
  • a flow responsive unit and a vacuum sensor check for leaks and a fluid salvage device receives excess fluid.
  • suitable valving is operated by an electrical control to caused the brake lines to be evacuated, a vacuum sensor tests for leaks and, if the brake lines are acceptable, valves are opened to fill the brake lines under pressure.
  • the invention is carried out by an apparatus for filling a hydraulic system with fluid and for air and water from the system comprising; an adaptor for coupling to the hydraulic system, a vacuum pump connected to the adaptor for evacuating the system, a closed vessel containing a supply of hydraulic fluid, means coupling the vacuum pump to the vessel for maintaining a vacuum above the supply of hydraulic fluid, and pump means mounted within the closed vessel and connected to the adaptor for supplying hydraulic fluid to the system.
  • the invention is further carried out by the method of filling a hydraulic system comprising the steps of; evacuating the system, providing a supply of hydraulic fluid in a vessel, removing water vapor and air from the supply of hydraulic fluid by evacuating the space in the vessel above the supply of fluid, transferring fluid from the evacuated vessel to the evacuated system until the system is filled, whereby the filled system is free of water and air bubbles, replenishing the fluid in the vessel by transferring fluid from a supply tank, and maintaining a desiccant in the form of dry gas in the supply tank to assure that the fluid transferred to the vessel is free of water.
  • FIGURE 1 is a schematic elevation of a plant installation of a brake filling system according to the invention
  • FIGURE 2 is a schematic diagram of the brake filling apparatus of FIGURE 1;
  • FIGURE 3 is a time chart of brake system pressure during filling.
  • the subject invention is especially adapted to filling vehicle brake systems during automotive assembly and is described for that specific embodiment. It will be recognized, however, that the method and apparatus apply to other kinds of hydraulic systems. Accordingly the terms “hydraulic fluid” or “hydraulic system” are considered to include “brake system” or “brake fluid”.
  • a brake filling system installed on an automotive assembly line comprises a base unit 10 on the floor adjacent the line of travel of vehicles 11, a console 12 mounted on an overhead track 14 for movement both parallel to and transverse to the vehicle path and connected by tubes 13 to the base unit, and a filling adaptor 16 coupled by a connecting tube 17 to the console 12.
  • the console includes a control panel to allow operator control of the immediate filling functions at the filling site.
  • Materials for supplying the base unit are the brake fluid contained in a drum 20 and nitrogen in tanks 22. These are transported to the station as needed and coupled by suitable lines 21 and 23, respectively, to the base unit 10.
  • the line 23 also couples the nitrogen tanks 22 to the drum 20.
  • an air drier can be used in place of the nitrogen tanks.
  • the base unit 10 includes a main tank 24 having a control valve assembly 26 for controlling incoming lines, a vacuum pump 28, and a hydraulic pressure source 30.
  • Electrical controls 31 for operating solenoid valves in the various lines are incorporated in the base unit and interface with the control panel in the console 12. To simplify the drawings the valves are not shown; they are employed in the conventional manner as dictated by the required control functions.
  • the vacuum pump 28 is coupled by line 29 to the console 12 for the evacuation of the brake system and to the main tank
  • the main tank 24 is a closed vessel partially filled with brake fluid, leaving a vacuum space above the fluid, and contains a pump 32 submerged in the fluid which is driven by a hydraulic motor 34 also submerged in the fluid.
  • the pump 32 supplies fluid to the brake system via the console 12. In the event the pump 32 suffers a leak, air cannot be drawn into the pumped fluid because the submerged pump is not exposed to air and likewise, any fluid leaking from the pump is not wasted.
  • the motor 34 is either a linear acting cylinder or a rotary motor and is driven by pressurized fluid from the pressure source 30.
  • the pressurized fluid is the same as the brake fluid in the main tank 24 so that in case of a leak at the motor 34 the brake fluid is not contaminated.
  • the hydraulic pressure source 30 comprises a tank 36 containing brake fluid and a pump 38 submerged in the fluid for supplying fluid to pressure line 40 which is connected to the pump 34 and to the adaptor 16 via the console 12.
  • the pump 38 is driven by an electric motor 42 outside the tank 36.
  • the console 12 interfaces between the base unit 10 and the adaptor 16 to couple hydraulic pressure, vacuum and dry gas to the adaptor 16 under operator control.
  • a pressure sensor 43 coupled to the adaptor vacuum line monitors the brake system pressure after the vacuum line is closed off to detect leakage in the system.
  • the adaptor 16 has clamps 44 operated by the pressure line 40 for securing the adaptor to the brake system.
  • the console also has a top off control 46 which is effective after the brake system is filled to withdraw excess fluid from the brake system by coupling a line 48 from the adaptor to the main tank and, at the same time, supplying nitrogen or dry air via line 23 to replace the excess fluid and to provide pressure to return the excess fluid to the main tank.
  • nitrogen or dry air is supplied to the drum 20 to serve as a desiccant to assure that the fluid in the drum is protected from the atmosphere and to remove any water which may be in the fluid.
  • fluid in the main tank 24 is replenished by opening a valve in the assembly 26 to allow fresh fluid to be drawn through line 21 into the evacuated tank 24.
  • the vacuum in the tank deaerates the fluid prior to supplying it to the adaptor.
  • the pressure is at 1 bar when the adaptor is clamped in place. Then at time Tl the vacuum line is opened to the adaptor and the system is rapidly evacuated. At time T2 the system pressure reaches 2 mbars and the vacuum line is closed. Between time T2 and T3 the pressure is monitored by the pressure sensor 43 to detect brake system leaks. If the pressure remains substantially at the 2 mbar level the leak test is acceptable and at time T3 fluid is supplied by pump 32 to fill the system until, at time T4 the pressure reaches approximately 4 bars. The pressure is reduced to 1 bar and, at time T5, the topping off action occurs whereby the pressure is reduced slightly below 1 bar while the excess fluid flows to the main tank 24.
  • the invention provides an improved brake filling method and apparatus which minimizes the usage of vacuum for fluid protection and enhances the quality and reliability of the equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

Un procédé et un appareil de remplissage de freins utilise de l'azote ou de l'air sec comme agent desséchant pour s'assurer qu'il n'y a pas d'humidité dans du liquide de freins provenant d'un réservoir d'alimentation ainsi qu'au point de remplissage. Un réservoir (24) principal de liquide comporte un vide au-dessus du liquide afin de désaérer le liquide, et comporte une pompe (32) submergée dans le liquide afin d'alimenter en liquide le système (18) de freinage. La pompe (32) est entraînée par un moteur submergé lequel est actionné par du liquide de freins sous pression. On évacue ledit système de freins, on contrôle la basse pression pendant un intervalle de test pour détecter des fuites, on remplit le système à l'aide de la pompe puis on renvoit le liquide excédentaire au réservoir (24) principal lequel est remplacé par de l'azote ou de l'air sec.
PCT/US1989/003751 1988-08-31 1989-08-29 Procede et appareil de remplissage de systemes hydrauliques WO1990002083A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23876988A 1988-08-31 1988-08-31
US238,769 1994-05-05

Publications (1)

Publication Number Publication Date
WO1990002083A1 true WO1990002083A1 (fr) 1990-03-08

Family

ID=22899235

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1989/003751 WO1990002083A1 (fr) 1988-08-31 1989-08-29 Procede et appareil de remplissage de systemes hydrauliques

Country Status (1)

Country Link
WO (1) WO1990002083A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717759A1 (fr) * 1994-03-25 1995-09-29 Peugeot Procédé de purge d'un circuit de freinage et dispositif pour la mise en Óoeuvre du procédé.
FR2777249A1 (fr) * 1998-04-10 1999-10-15 Gilles Bompuis Purgeur par aspiration ou pression de circuit hydraulique de freinage ou d'embrayage
EP1820975A2 (fr) 2006-02-17 2007-08-22 Magneti Marelli Powertrain S.p.A. Procédé et installation pour le remplissage d'un circuit hydraulique avec un fluide de contrôle
CN102476784A (zh) * 2011-01-24 2012-05-30 江门市大长江集团有限公司 一种机动车制动液加注方法及其设备
US10656038B2 (en) * 2018-07-30 2020-05-19 Honda Motor Co., Ltd. Apparatus, system, and method for use in fluid filling apparatus inspection

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1617020A (en) * 1925-06-15 1927-02-08 George S Merwin Liquid saving, replenishing, and air-bleeding mechanism for hydraulic brakes
US2295539A (en) * 1940-04-11 1942-09-15 Puritan Company Apparatus for servicing hydraulic brakes
US3425464A (en) * 1967-01-17 1969-02-04 Gen Motors Corp Fluid filling method and apparatus
DE2309559A1 (de) * 1972-02-28 1973-09-13 Wagner Electric Corp Mittels unterdruck entlueftbarer radbremszylinder
DE2744767A1 (de) * 1977-10-05 1979-04-12 Ziemann Gmbh A Verfahren zur inertisierung von behaeltern mittels stickstoff
GB2086834A (en) * 1980-11-11 1982-05-19 Abbott Lab Packaging particulate material in an inert atmosphere
US4415071A (en) * 1981-07-27 1983-11-15 Butler Eric S Device for bleeding brakes and refilling brake system
SU1164109A1 (ru) * 1983-04-21 1985-06-30 Musijchuk Pavel A Стенд дл технического обслуживани гидросистем автомобил
US4756159A (en) * 1983-11-28 1988-07-12 Automotive Products Plc Prefilling apparatus for modular prefilled hydraulic control apparatus
US4793386A (en) * 1987-09-03 1988-12-27 Sloan Pump Company, Inc. Apparatus and method using portable pump

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1617020A (en) * 1925-06-15 1927-02-08 George S Merwin Liquid saving, replenishing, and air-bleeding mechanism for hydraulic brakes
US2295539A (en) * 1940-04-11 1942-09-15 Puritan Company Apparatus for servicing hydraulic brakes
US3425464A (en) * 1967-01-17 1969-02-04 Gen Motors Corp Fluid filling method and apparatus
DE2309559A1 (de) * 1972-02-28 1973-09-13 Wagner Electric Corp Mittels unterdruck entlueftbarer radbremszylinder
DE2744767A1 (de) * 1977-10-05 1979-04-12 Ziemann Gmbh A Verfahren zur inertisierung von behaeltern mittels stickstoff
GB2086834A (en) * 1980-11-11 1982-05-19 Abbott Lab Packaging particulate material in an inert atmosphere
US4415071A (en) * 1981-07-27 1983-11-15 Butler Eric S Device for bleeding brakes and refilling brake system
SU1164109A1 (ru) * 1983-04-21 1985-06-30 Musijchuk Pavel A Стенд дл технического обслуживани гидросистем автомобил
US4756159A (en) * 1983-11-28 1988-07-12 Automotive Products Plc Prefilling apparatus for modular prefilled hydraulic control apparatus
US4793386A (en) * 1987-09-03 1988-12-27 Sloan Pump Company, Inc. Apparatus and method using portable pump

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2717759A1 (fr) * 1994-03-25 1995-09-29 Peugeot Procédé de purge d'un circuit de freinage et dispositif pour la mise en Óoeuvre du procédé.
FR2777249A1 (fr) * 1998-04-10 1999-10-15 Gilles Bompuis Purgeur par aspiration ou pression de circuit hydraulique de freinage ou d'embrayage
EP1820975A2 (fr) 2006-02-17 2007-08-22 Magneti Marelli Powertrain S.p.A. Procédé et installation pour le remplissage d'un circuit hydraulique avec un fluide de contrôle
EP1820975A3 (fr) * 2006-02-17 2009-11-04 Magneti Marelli Powertrain S.p.A. Procédé et installation pour le remplissage d'un circuit hydraulique avec un fluide de contrôle
US8091693B2 (en) 2006-02-17 2012-01-10 Magneti Marelli Powertrain S.P.A. Method and plant for filling a hydraulic circuit with a control fluid
CN102476784A (zh) * 2011-01-24 2012-05-30 江门市大长江集团有限公司 一种机动车制动液加注方法及其设备
CN102476784B (zh) * 2011-01-24 2014-09-24 江门市大长江集团有限公司 一种摩托车制动液加注方法及其设备
US10656038B2 (en) * 2018-07-30 2020-05-19 Honda Motor Co., Ltd. Apparatus, system, and method for use in fluid filling apparatus inspection

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