WO1999016651A1 - Systeme de freinage hydraulique pour automobile - Google Patents

Systeme de freinage hydraulique pour automobile Download PDF

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Publication number
WO1999016651A1
WO1999016651A1 PCT/EP1998/006150 EP9806150W WO9916651A1 WO 1999016651 A1 WO1999016651 A1 WO 1999016651A1 EP 9806150 W EP9806150 W EP 9806150W WO 9916651 A1 WO9916651 A1 WO 9916651A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake system
motor vehicle
hydraulic motor
vehicle brake
heating device
Prior art date
Application number
PCT/EP1998/006150
Other languages
German (de)
English (en)
Inventor
Harald KÖNIG
Günther VOGEL
Joachim Böing
Original Assignee
Continental Teves Ag & Co. Ohg
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
Priority claimed from DE19754163A external-priority patent/DE19754163A1/de
Application filed by Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Priority to JP2000513753A priority Critical patent/JP2001518425A/ja
Priority to EP98952654A priority patent/EP1019275A1/fr
Publication of WO1999016651A1 publication Critical patent/WO1999016651A1/fr

Links

Classifications

    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/48—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • 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
    • 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
    • B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
    • B60T17/043—Brake line couplings, air hoses and stopcocks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • F16L11/127—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting electrically conducting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons

Definitions

  • the invention relates to a hydraulic, motor vehicle brake system filled with a fluid, in particular with an anti-lock function and / or driving stability control function, with at least one master brake cylinder which is connected to at least one brake cylinder in a liquid-tight manner by means of at least one pipe.
  • Such motor vehicle brake systems have been known for a long time, are widely used and basically perform their function satisfactorily.
  • problems can occur. It is problematic if brake fluid, for example as part of a driving stability control function, that is to say without a driver's request, is to be shifted particularly quickly from a brake fluid reservoir, namely a brake fluid reservoir, to a wheel brake with the brake cylinder. With falling temperatures, the viscosity of the brake fluid increases disproportionately. At very low temperatures, this means that the brake fluid cannot be sucked in quickly enough, with the fact that the pressure loss in the pipeline increases with increasing viscosity. These obstacles lead to a slow braking intervention.
  • the object of the present invention is therefore to ensure the function of a hydraulic motor vehicle brake system with all its subfunctions such as anti-blocking function and driving stability function with little effort, even at very low outside temperatures.
  • the device is an electrical resistance heater, which can be operated simply and inexpensively with the aid of electrical current and, in a further development of the invention, can be integrated into the suction line in a space-saving manner.
  • An electrical resistance heating device has no moving parts, so that no wear occurs and no maintenance is necessary.
  • the electrical resistance heating device is assigned to the master brake cylinder.
  • Fig. 1 intake line according to the invention according to a first embodiment in longitudinal section;
  • Fig. 2 shows a second embodiment in section as in Fig. 1;
  • Fig. 3 shows a third embodiment as in Fig. 2;
  • Figure 4 shows the third embodiment in section along the line IV-IV in Fig. 3.
  • Fig. 5 shows a master cylinder in longitudinal section with electrical resistance heating devices.
  • a hydraulic motor vehicle brake system comprises at least one master brake cylinder which is connected to at least one brake cylinder by means of a pipeline.
  • a pump with a pressure module tion device may be necessary.
  • the pump is connected to the brake fluid reservoir with at least one suction line 1 according to FIG. 1, namely, for example, an expansion tank or a reserve tank.
  • the pump draws brake fluid from the brake fluid reservoir and shifts this sucked-in volume in the direction of the wheel brake with the help of control valves and pressure lines that are of no further interest here.
  • the intake line 1 is provided with means for introducing thermal energy into the brake fluid.
  • the intake line 1 has an electric heating device 2 with which the brake fluid can be heated, so that the viscosity of the brake fluid is reduced and this leads to an improved and faster pumping capacity of the brake fluid at low temperatures. Whenever there is talk of a reduction in viscosity in the following, this means the effect that the flowability improves at a low outside temperature.
  • the electrical resistance heating device 2 is integrated in the suction line 1 and is operated with the aid of electric current. A three-layer structure of the intake line 1 is used.
  • the intake line 1 has a heating layer 5, which comes into contact with the brake fluid with its inner wall 4, to which there is a radially outer side Insulating layer 6 connects and finally a casing 7 on the outer circumference for protection against external influences.
  • the heating layer 5 can be implemented by various means. On the one hand, an electrically conductive plastic is conceivable, with conductive particles being added to a carrier material, so that layer 5 becomes conductive overall. It is also conceivable to pass electrical heating wires through a plastic layer. However, all of these variants are subject to the principle claimed by the invention.
  • An advantage of the embodiment shown in Fig. 1 is that the suctioned brake fluid is in direct contact with the inner wall 4 of the heating layer 5, so that hardly any thermal losses occur.
  • the heating layer 5 ' is located on the outer circumference of the suction line 1' without it having direct liquid contact.
  • This embodiment is characterized by simple manufacturability, because the Entire pipe 1 'can be done simply by dip coating the outer clothing 8 in a plastic bath.
  • the intake line 1 has a radially inner insulating layer 6" which has direct contact with the brake fluid.
  • a sheath 7 connects radially outwards to protect against external stresses.
  • This variant has a heating element 11 which is at least partially arranged in the intake cross section 3" and extends through at least part of the length of the intake line 1 ".
  • the heating element 11 is in the Arranged inside a cross-shaped holding element 12, which abuts the inner wall 17 of the insulating layer 6 ′′ via legs 13, 14, 15, 16.
  • This variant also has the advantage that the heating element 11 has almost direct contact with the brake fluid, so that low heat losses occur.
  • the assembly takes place, for example, in that the heating element 11 is pressed together with the holding element 12 into the suction line 1 ".
  • the invention allows the viscosity of the brake fluid to be reduced in a simple manner over the entire length of the intake line 1, 1 ', 1 ".
  • the advantage here is the unrestricted flexibility, ie flexibility of the intake line 1, 1', 1", the small space requirement and the simple, inexpensive producibility.
  • This arrangement makes it possible to dispense with a separate precharge pump next to the actual pump, even at the lowest external temperatures, the proper functioning of the motor vehicle brake system is guaranteed.
  • the invention is not limited to the suction line alone. In principle, other sections of the brake fluid line can also be provided with a device according to the invention.
  • an electrical resistance heating device 20, 21 can alternatively be arranged on or in a brake fluid reservoir or in a master brake cylinder 22 without departing from the invention.
  • FIG. 5 shows a master brake cylinder 22 in a plunger design, which is suitable for the fact that brake fluid can be sucked in through the master brake cylinder during driver-independent braking.
  • An electrical resistance heating device 20, 21 with heating coils 23, 24 is arranged in the master brake cylinder 22.
  • the helix 24 to at least partially engage in the interior 27 of a piston 28.
  • the heating coil 24 lies outside the range of movement of the piston 28.
  • Combinations of the construction types mentioned are also possible. Of course, this also applies to combinations of a line heating device 2, 2 ', 2 "with a heating device 20, 21 on or in the master cylinder 22 or on or in a brake fluid container.
  • the supply lines 31, 32 of the heating device 20 are preferably injected into the housing 29 in a liquid-tight manner with an insulating material, as a result of which the manufacturing process is accelerated and simplified.
  • the heating device 21 is screwed into the housing 29 with a connector 30 and then the ends of the heating coil 23 are inserted into the connector 30.
  • This design allows simple replacement of the heating coil 23 and a simple modification of the series production, the main brake cylinders with heating device differing from the main brake cylinders without heating device by the inserted heating coil 23.
  • heating of the brake fluid has been mentioned in the above text, this must always be seen in terms of an improvement in flowability in the low-temperature range below 0 ° C. For example, good results are achieved with brake fluid temperatures in the range of 4 ° C and more. In any case, heating does not mean that the brake fluid is additionally heated, for example in summer, at temperatures above 20 ° C.
  • a corresponding control using an outside temperature door sensors are provided so that the heating device 2,2 ', 2 ", 20,21 is only put into operation when required and consequently only loads the vehicle electrical system in these cases.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Pipe Accessories (AREA)

Abstract

L'invention concerne un système de freinage hydraulique rempli de fluide, notamment pour automobiles, comportant au moins un maître-cylindre (22) relié en liaison étanche au fluide, à l'aide d'au moins une conduite (1, 1', 1') et/ou d'un flexible, avec au moins un cylindre de frein. L'invention se caractérise en ce qu'il est prévu au moins un élément destiné à introduire de l'énergie thermique dans le liquide de frein. Cette mesure permet, même lorsque les températures extérieures sont particulièrement basses et en raison du liquide de frein visqueux, d'assurer la fonction conforme du système de freinage pour automobile, sans requérir l'utilisation d'une pompe de précharge. Ce système de freinage pour automobile est de ce fait particulièrement simple et économique à produire.
PCT/EP1998/006150 1997-10-01 1998-09-28 Systeme de freinage hydraulique pour automobile WO1999016651A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2000513753A JP2001518425A (ja) 1997-10-01 1998-09-28 自動車用液圧ブレーキシステム
EP98952654A EP1019275A1 (fr) 1997-10-01 1998-09-28 Systeme de freinage hydraulique pour automobile

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19743462.2 1997-10-01
DE19743462 1997-10-01
DE19754163.1 1997-12-06
DE19754163A DE19754163A1 (de) 1997-10-01 1997-12-06 Hydraulische Kraftfahrzeug-Bremsanlage

Publications (1)

Publication Number Publication Date
WO1999016651A1 true WO1999016651A1 (fr) 1999-04-08

Family

ID=26040498

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1998/006150 WO1999016651A1 (fr) 1997-10-01 1998-09-28 Systeme de freinage hydraulique pour automobile

Country Status (3)

Country Link
EP (1) EP1019275A1 (fr)
JP (1) JP2001518425A (fr)
WO (1) WO1999016651A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6416141B1 (en) 1999-02-25 2002-07-09 Kelsey-Hayes Company Methods for improving braking performance in electronically-controlled hydraulic brake systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140361099A1 (en) * 2013-06-05 2014-12-11 Finishing Brands Holdings Inc. System and Method for Thermal Control of Flow Through a Conduit

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056424A1 (fr) * 1981-01-17 1982-07-28 FAG KUGELFISCHER GEORG SCHÄFER Kommanditgesellschaft auf Aktien Procédé et appareil pour déterminer le point d'ébullition de liquide pour freins
DE3709189A1 (de) * 1987-03-20 1988-09-29 Teves Gmbh Alfred Hydraulische bremsanlage mit blockierschutz- und/oder antriebsschlupfregelung
DE3741971A1 (de) * 1987-12-11 1989-06-22 Kieninger & Obergfell Vorrichtung zur ermittlung des anteiles einer fluessigkeitskomponente niedrigerer verdampfungstemperatur in einem fluessigkeitsgemisch
DE3900821C1 (en) * 1989-01-13 1990-04-19 Technoform Caprano + Brunnhofer Kg, 3501 Fuldabrueck, De Fluid-carrying hose line for a motor vehicle
DE4107978A1 (de) * 1991-03-13 1992-09-17 Bosch Gmbh Robert Verfahren zum beschleunigen des bremseneingriffs im antriebsschlupfregelbetrieb und hydraulische bremsanlage zur durchfuehrung des verfahrens
EP0616166A1 (fr) * 1993-03-17 1994-09-21 Applied Materials, Inc. Conduit de fluides chauffable
GB2284265A (en) * 1993-11-25 1995-05-31 Nicola Marie Hay A boiling point indicating device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056424A1 (fr) * 1981-01-17 1982-07-28 FAG KUGELFISCHER GEORG SCHÄFER Kommanditgesellschaft auf Aktien Procédé et appareil pour déterminer le point d'ébullition de liquide pour freins
DE3709189A1 (de) * 1987-03-20 1988-09-29 Teves Gmbh Alfred Hydraulische bremsanlage mit blockierschutz- und/oder antriebsschlupfregelung
DE3741971A1 (de) * 1987-12-11 1989-06-22 Kieninger & Obergfell Vorrichtung zur ermittlung des anteiles einer fluessigkeitskomponente niedrigerer verdampfungstemperatur in einem fluessigkeitsgemisch
DE3900821C1 (en) * 1989-01-13 1990-04-19 Technoform Caprano + Brunnhofer Kg, 3501 Fuldabrueck, De Fluid-carrying hose line for a motor vehicle
DE4107978A1 (de) * 1991-03-13 1992-09-17 Bosch Gmbh Robert Verfahren zum beschleunigen des bremseneingriffs im antriebsschlupfregelbetrieb und hydraulische bremsanlage zur durchfuehrung des verfahrens
EP0616166A1 (fr) * 1993-03-17 1994-09-21 Applied Materials, Inc. Conduit de fluides chauffable
GB2284265A (en) * 1993-11-25 1995-05-31 Nicola Marie Hay A boiling point indicating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6416141B1 (en) 1999-02-25 2002-07-09 Kelsey-Hayes Company Methods for improving braking performance in electronically-controlled hydraulic brake systems

Also Published As

Publication number Publication date
JP2001518425A (ja) 2001-10-16
EP1019275A1 (fr) 2000-07-19

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