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WO1991011348A1 - Dispositif utilisable dans le systeme de freins de vehicules a moteur et maitre-cylindre de freins utilisable dans un tel dispositif - Google Patents

Dispositif utilisable dans le systeme de freins de vehicules a moteur et maitre-cylindre de freins utilisable dans un tel dispositif Download PDF

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Publication number
WO1991011348A1
WO1991011348A1 PCT/DK1991/000024 DK9100024W WO9111348A1 WO 1991011348 A1 WO1991011348 A1 WO 1991011348A1 DK 9100024 W DK9100024 W DK 9100024W WO 9111348 A1 WO9111348 A1 WO 9111348A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve slide
master cylinder
valve
pressure chamber
slide
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/DK1991/000024
Other languages
English (en)
Inventor
Niels Oluf Skipper
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tjaereby Elektronik Aps
Original Assignee
Tjaereby Elektronik Aps
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 Tjaereby Elektronik Aps filed Critical Tjaereby Elektronik Aps
Publication of WO1991011348A1 publication Critical patent/WO1991011348A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • B60R25/08—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on brakes or brake 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
    • B60T11/103—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 in combination with other control devices
    • B60T11/105—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 in combination with other control devices with brake locking after actuation, release of the brake by a different control device, e.g. gear lever
    • 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
    • B60T17/08—Brake cylinders other than ultimate actuators
    • B60T17/16—Locking of brake cylinders

Definitions

  • the invention concerns a device of the type stated in the introductory portion of claim 1.
  • Devices of this type are used for preventing persons with ⁇ out authorized access to a vehicle from driving the ve- hicle, and there are already numerous proposals for such devices, cf. e.g. the GB Patent Applications 2 024 351, 2 035 486, 2 195 005 and 2 205 076, the PCT Application 89/01885, the FR Patent Specification 2 541 956 and the US Patent Specifications 3 625 573, 4 546 846, 4 765 362 and 777 377.
  • the non-return valve which blocks the brake system of the vehicle in the locking situation, is mounted as a more or less free component, which partly makes it vulnerable and relatively easy to bypass by means of a bypass line, partly makes the brake system unneces ⁇ sarily complicated by requiring special hydraulic connect ⁇ ing lines.
  • the object of the invention is to provide a device of the type mentioned in the opening paragraph, which is not vitiated by the above-mentioned drawbacks, and this object is achieved by a device which is characterized according to the invention by the features defined in the character- izing portion of claim 1.
  • the invention also concerns a master brake cylinder unit for use in a device according to the invention.
  • This unit is of the type stated in the introductory portion of claim 7 and is characterized according to the invention by the structure defined in the characterizing portion of claim 7.
  • fig. 1 shows the device with the valve slide in the open position or the free position
  • fig. 2 shows the device with the valve slide in the locked position.
  • the cylinders associated with the indivi- dual brakes are connected through schematically indicated hydraulic lines 1 with a pressure chamber 2, which can be connected by means of a valve slide 3, which is equipped with a non-return valve 3a and is slidingly journalled in a slide chamber 3b, in various ways with the cylinder chamber 5a in a master cylinder 5 defined by a brake piston 4.
  • a pressure chamber 2 which can be connected by means of a valve slide 3, which is equipped with a non-return valve 3a and is slidingly journalled in a slide chamber 3b, in various ways with the cylinder chamber 5a in a master cylinder 5 defined by a brake piston 4.
  • valve slide 3 has a through opening 3c which, in the valve slide posi ⁇ tion shown in fig. 1, creates unobstructed passage in both directions through the cylinder chamber 5a and the pres- sure chamber 2.
  • the master cylinder 5 will thus operate in normal manner since movement of the piston 4 to the left and to the right in fig. 1 will cause actuation and deactuation, respectively, of the brakes (not shown) connected with the pressure chamber 2.
  • the connection between the cylinder chamber 5a and the pressure chamber 2 is formed by the non-return valve 3a alone, which just allows flow from the cylinder chamber 5a to the pressure chamber 2, but not vice versa.
  • This entails that movement of the brake piston 4 to the left - i.e. the normal brake movement caused by a brake pedal (not shown) connected in known manner with the piston 4 - will cause brake fluid to flow to the brakes in normal manner, while an oppositely directed movement of the pis ⁇ ton 4, i.e.
  • the valve slide 3 is adapted to assume both the free posi ⁇ tion shown in fig. 1 and the locked position shown in fig. 2 in a stable manner, i.e. it requires no external force for securing at one or the other position.
  • Such a "bi- stable” device can be achieved in many different, known manners, including securing in the extreme position by means of permanent magnets, but to facilitate the under ⁇ standing of the drawing the means necessary for this are symbolized in the form of a spring-loaded locking ball 10, which is adapted to engage with two locking notches 10a and 10b in the valve slide 3 corresponding to the said positions.
  • the means moving the valve slide 3 between the free posi- tion and the locked position may be of different types, but owing to the fact that the brake cylinders of motor vehicles are usually mounted at a place where a mechanical connection to the dashboard of the vehicle will be incon ⁇ venient, it is preferred, as shown in fig. 1, to connect the valve slide 3, preferably directly, with a symboli ⁇ cally shown common armature 3d associated with two, like ⁇ wise symbolically shown electromagnets 6 and 7, which are adapted to act on the armature 3d in mutually opposite di ⁇ rections, so that actuation of the electromagnet 6 causes the valve slide 3 to be moved from the locked position shown in fig. 2 to the free position shown in fig. 1, while actuation of the electromagnet 7 correspondingly results in an oppositely directed movement of the valve slide 3, i.e. to the locked position shown in fig. 2.
  • the electromagnets 6 and 7 are connected through control lines 6a and 7a, respectively, with suitable operating means on or in the vicinity of the dashboard of the ve ⁇ hicle; these operating means may e.g. be formed by con- tacts on a lockable switch such that turning of this switch to the operating position causes the electromagnet 6 to be actuated, while turning to the rest or locked po ⁇ sition will cause the electromagnet 7 to be actuated.
  • the switch is mechanical and/or coupled to the ignition lock of the vehicle such that it cannot be ope- rated when the ignition key is removed.
  • the shown device comprises a pro- tective relay 8 with two operating contacts - i.e. in contacts closed when the relay is switched on - 8a and 8b which are interposed between the electromagnets 6 and 7, respectively, and their control lines 6a and 7a, respec ⁇ tively.
  • the relay coil 9 of the protective relay 8 is permanently connected to the power supply system of the vehicle through a line 9a, and the relay 8 will therefore normally be kept in- switched-on position so that there is no interruption between the electromagnets 6 and 7 and their control lines 6a and 7a, respectively.
  • valve slide 3 cannot be moved and remains in the position last assumed. If the power supply system or the part of it which is connected to the shown device fails during normal driving, where the valve slide 3 is in the free position shown in fig. 1, the valve slide will remain in this position, and the brake system cannot be unintentionally blocked.
  • valve slide 3 If the vehicle stands still and the valve slide 3 is in the locked position shown in fig. 2, cutting of the lines will also cause the valve slide 3 to remain in the posi- tion last assumed, i.e. the locked position, and the valve slide 3 cannot be moved away from this .position, e.g. by short circuit.
  • valve slide 3 The means necessary to move the valve slide 3 are des- cribed in the foregoing as two electromagnets 6 and 7, based on electrical remote control of the valve slide.
  • electrical remote control of the valve slide In principle nothing prevents the valve slide 3 from being remote-controlled in another manner, e.g. pneumatically by means of a piston in a cylinder, which requires no detailed explanation since persons skilled in the field will have no difficulty in constructing and creating the necessary pneumatic equipment. It is contem ⁇ plated that such pneumatic remote control will be used in particular in connection with pneumatically controlled and/or actuated brakes where a compressed air system is already present. Mechanical or hydraulic remote control is also within the scope of the invention, but requires no further explanation for the mentioned reasons.
  • the relay 8 does not necessarily have to be an electromag ⁇ netic relay as shown, but may e.g. be formed by a semi ⁇ conductor circuit with a corresponding function, which persons skilled in the semi-conductor field will be able to construct and create without further instructions.
  • the brakes are blocked by means of the device of the invention the first time e.g. a person without authorized access to the vehicle actuates the brakes after commenced driving. Then the vehicle remains standing in permanently braked state and may then obstruct the traffic since the vehicle can now no longer be removed without special aids. Furthermore, the brake system may be damaged by being actuated for an extended period of time. Thus, the brakes can e.g. rust in.
  • this draw ⁇ back can be remedied by the insertion of a time mechanism 11 or timer between the control lines 6a, 7a of the elec ⁇ tromagnets 6, 7 (fig. 1).
  • This time mechanism 11 includes an electric circuit (not shown) which is so arranged that following a predetermined period of time it first briefly actuates the electromagnet 6 and then changes to actuate the electromagnet 7 briefly. This entails that the pres ⁇ sure is relieved in the pressure chamber 2, and that the brakes are deactuated thereby so that, if desired, the vehicle can be pulled in so that it does not obstruct the traffic.
  • the period of time which elapses before the time mechanism 11 initiates this process may be selected freely as required, but suitably it may be rather brief, e.g. just a few minutes since the brakes will again be blocked if the said person without authorized access to the ve ⁇ hicle will try to drive on with the vehicle when the time mechanism 11 had deactuated the brakes.
  • a permanently open connection 12 may be provided between the pressure side 5a of the master cylinder 5 and the pressure chamber 2 (fig. 2).
  • This connection 12 has a flow resistance so adjusted that when the valve slide 3 is in its locked position and the brakes are blocked, the pressure in the pressure cham ⁇ ber 2 is relieved within e.g. the above-mentioned rela- tively short time of some minutes. If it is attempted to drive the vehicle again after this period of time, the brakes are blocked again, and the vehicle cannot therefore be used by persons without authorized access.
  • the last- mentioned embodiment has the advantage that it operates independently of any interruptions of the electrical power supply.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Regulating Braking Force (AREA)

Abstract

Dans un maître-cylindre de freins (5), dont la chambre (5a) est reliée par une chambre de pression (2) et par des lignes hydrauliques (1) aux cylindres de freins (non représentés) de chacune des roues, un tiroir de soupape (3) est inséré entre la chambre de cylindre (5a) et la chambre de pression (2). Le tiroir de soupape (3) peut être amené à se déplacer entre la position libre représentée, dans laquelle il libère le passage dans les deux sens à travers une ouverture traversante (3c), et une position bloquée (non représentée), dans laquelle le passage dans le sens allant de la chambre de pression (2) à la chambre de cylindre (5a) est bloqué par une soupape de non-retour (3a), qui permet ainsi l'actionnement uniquement et non le relâchement des freins. Toute tentative de mise en route du véhicule tandis que le tiroir de soupape (3) se trouve en position bloquée (non représenté) entraîne par conséquent un blocage des freins dans la première situation donnée et toute avance ultérieure du véhicule est ainsi empêchée. Le tiroir de soupape (3) peut être amené à se déplacer par un organe de télécommande approprié, constitué dans l'exemple représenté par des électro-aimants (6 et 7) pourvus de lignes de commande associées (6a et 7a), entre les deux positions décrites, dans lesquelles le tiroir est maintenu en position fixe par exemple par une bille de blocage (10) qui s'engage dans l'une des deux encoches de blocage (10a, 10b).
PCT/DK1991/000024 1990-01-26 1991-01-25 Dispositif utilisable dans le systeme de freins de vehicules a moteur et maitre-cylindre de freins utilisable dans un tel dispositif Ceased WO1991011348A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK616790 1990-01-26
DK6167/89 1990-01-26

Publications (1)

Publication Number Publication Date
WO1991011348A1 true WO1991011348A1 (fr) 1991-08-08

Family

ID=8147795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1991/000024 Ceased WO1991011348A1 (fr) 1990-01-26 1991-01-25 Dispositif utilisable dans le systeme de freins de vehicules a moteur et maitre-cylindre de freins utilisable dans un tel dispositif

Country Status (2)

Country Link
AU (1) AU7218091A (fr)
WO (1) WO1991011348A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536014A1 (fr) * 1991-09-30 1993-04-07 AlliedSignal Freni S.p.A. Maître-cylindre verrouillable
WO1994000318A1 (fr) * 1992-06-24 1994-01-06 Auscan Brake Lock Ltd. Dispositif a soupape destine au verrouillage d'un circuit de frein hydraulique
GB2272961A (en) * 1992-11-26 1994-06-01 John Henry Abbott An hydraulic or pneumatic pipeline security arrangement
WO1994025317A1 (fr) * 1993-05-05 1994-11-10 Main Louis F Systeme anti-vol par blocage des freins, pour vehicule
WO2003039924A3 (fr) * 2001-11-09 2003-12-11 Univ California Dispositif et procédé permettant de stopper un véhicule

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2080603A (en) * 1934-09-04 1937-05-18 Cometto Domingo Safety brake for automobiles, against theft of the same
USRE21602E (en) * 1938-09-09 1940-10-22 Hydraulic brake holding apparatus
US2224747A (en) * 1938-09-02 1940-12-10 Sacks Philip Brake locking mechanism for automobiles
US2231294A (en) * 1940-02-26 1941-02-11 Charles D Queen Hydraulic brake control
US2574821A (en) * 1947-12-22 1951-11-13 Chrysler Corp Brake holding device and vacuum switch actuated control circuit therefor
US3910372A (en) * 1973-04-13 1975-10-07 Morton Mozzar Automatic antitheft lock for motor vehicles
US4040675A (en) * 1976-07-26 1977-08-09 Raymond Richmond Anti-theft vehicle brake-supervising device
US4546846A (en) * 1984-04-19 1985-10-15 Myers Ronald L Safe lock anti-theft hydraulic brake control system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2080603A (en) * 1934-09-04 1937-05-18 Cometto Domingo Safety brake for automobiles, against theft of the same
US2224747A (en) * 1938-09-02 1940-12-10 Sacks Philip Brake locking mechanism for automobiles
USRE21602E (en) * 1938-09-09 1940-10-22 Hydraulic brake holding apparatus
US2231294A (en) * 1940-02-26 1941-02-11 Charles D Queen Hydraulic brake control
US2574821A (en) * 1947-12-22 1951-11-13 Chrysler Corp Brake holding device and vacuum switch actuated control circuit therefor
US3910372A (en) * 1973-04-13 1975-10-07 Morton Mozzar Automatic antitheft lock for motor vehicles
US4040675A (en) * 1976-07-26 1977-08-09 Raymond Richmond Anti-theft vehicle brake-supervising device
US4546846A (en) * 1984-04-19 1985-10-15 Myers Ronald L Safe lock anti-theft hydraulic brake control system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0536014A1 (fr) * 1991-09-30 1993-04-07 AlliedSignal Freni S.p.A. Maître-cylindre verrouillable
WO1994000318A1 (fr) * 1992-06-24 1994-01-06 Auscan Brake Lock Ltd. Dispositif a soupape destine au verrouillage d'un circuit de frein hydraulique
GB2272961A (en) * 1992-11-26 1994-06-01 John Henry Abbott An hydraulic or pneumatic pipeline security arrangement
WO1994025317A1 (fr) * 1993-05-05 1994-11-10 Main Louis F Systeme anti-vol par blocage des freins, pour vehicule
WO2003039924A3 (fr) * 2001-11-09 2003-12-11 Univ California Dispositif et procédé permettant de stopper un véhicule
US7191862B2 (en) 2001-11-09 2007-03-20 Regents Of The University Of California Apparatus for stopping a vehicle
US7631950B2 (en) 2001-11-09 2009-12-15 Lawrence Livermore National Security, Llc Apparatus for stopping a vehicle

Also Published As

Publication number Publication date
AU7218091A (en) 1991-08-21

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