EP0607220A1 - Dispositifs anti-vol pour vehicules a moteur - Google Patents

Dispositifs anti-vol pour vehicules a moteur

Info

Publication number
EP0607220A1
EP0607220A1 EP92920796A EP92920796A EP0607220A1 EP 0607220 A1 EP0607220 A1 EP 0607220A1 EP 92920796 A EP92920796 A EP 92920796A EP 92920796 A EP92920796 A EP 92920796A EP 0607220 A1 EP0607220 A1 EP 0607220A1
Authority
EP
European Patent Office
Prior art keywords
engine
capsule
vehicle
exhaust
vacuum
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.)
Withdrawn
Application number
EP92920796A
Other languages
German (de)
English (en)
Inventor
Wladyslaw Wygnanski
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.)
Individual
Original Assignee
Individual
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 GB919121383A external-priority patent/GB9121383D0/en
Application filed by Individual filed Critical Individual
Publication of EP0607220A1 publication Critical patent/EP0607220A1/fr
Withdrawn legal-status Critical Current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
    • B60R25/04—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 the propulsion system, e.g. engine or drive motor
    • B60R25/043—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 the propulsion system, e.g. engine or drive motor by blocking the exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • This invention concerns anti-theft devices for motor powered vehicles.
  • vehicles any conveyance such as a car, lorry, bus, boat, hovercraft, aeroplane or railway engine which is powered by an internal conbustion engine.
  • a vehicle anti theft device comprises closure means movable to block or substantially block the engine exhaust path in response to a rise in temperature and/or pressure brought about by the running of the vehicle engine and interactive means operable by an authorised user of the vehicle, to inhibit or nullify or cancel the blocking movement of the closure means.
  • the interactive locking means may be operated from within the vehicle by a button or lever which may be hidden and which itself may be operable only by means of a key or the entry of a code.
  • the interactive means may be adapted to be operated automatically when a person carrying a particular coded device enters or boards the vehicle.
  • the interactive means may be adapted to operate automatically if a code is entered by the driver or authorised person at a particular time during the start up procedure either before, or after, the engine is started.
  • the closure means may be located at any point downstream of the exhaust valves of the engine and may be situated in or on the exhaust manifold or within a pipe leading therefrom to the exhaust and if fitted, silencer system, of the engine.
  • the closure means comprises a pivotable flap which is rotatable by a drive means from a position in which the plane of the flap is substantially aligned with the direction of exhaust gas flow (thereby not to impede the flow) to a position in which the flap is substantially perpendicular to the said direction of gas flow to block the flow.
  • the drive means may be activated or derive motivating energy from the temperature or pressure rise of gases exhausting from the engine after start-up of the engine, and the interactive means determines a reference position for the said drive means and the latter is movable from a first position (in which movement of the drive means rotates the flap into the said blocking position) into a second position (in which movement of the drive means is either prevented or is in effective to rotate the said flap).
  • a preferred drive means responsive to an increase in gas temperature, comprises a first capsule which is resiliently expansible and contains gas or a liquid or a combination thereof and which is heated by the exhaust gases.
  • the interactive means may then comprise a similar second capsule which is resiliently contractible and is mounted in series with the first capsule between the latter and a fixed point, which second capsule, if the vehicle is under the control of an authorised person, will contract when the engine is running, so as to nullify the expansion of the first capsule thereby maintaining the closure device in an "open" state.
  • Contraction of the second capsule may be achieved by connecting it to a source of vacuum such as the inlet manifold of the engine which develops a vacuum when the engine is running.
  • a normally closed valve which can only be opened by an authorised user of the vehicle
  • the engine exhaust will become blocked as soon as the exhaust gases have heated up the contents of the expansible capsule unless the normally closed valve has been opened to connect the inlet manifold vacuum to the second capsule, as is the case of the engine start up procedure is under the control of an authorised person.
  • the inlet manifold vacuum source may be connected via a one way valve to a vacuum chamber and latter may be connected to the second capsule also by means of a one-way valve so as to obviate vacuum variations during normal running of the engine.
  • the interactive means may be pneumatically operable, it is to be understood that the invention is in no way limited to such an arrangement and the interactive means may be operated by any mechanical means, electrical means, electromechanical means, pneumatic means, hydraulic means or any combination thereof.
  • the preferred drive means is described as being a resiliently expansible capsule containing gas or liquid or a combination thereof, the invention is in no way limited to such a drive means and any device whose physical characteristics alter as it is heated, or subjected to pressure, may be employed provided the movement obtained by the rise in temperature, or rise in pressure, is sufficient to activate the closure means.
  • the drive means comprises an expansible gas containing capsule
  • the latter may be connected to the end of a cylinder within which a piston is slidable and which includes spring means which urges the piston towards the said one end of the cylinder.
  • the spring means is sufficiently strong so that on its own it resists the increase in pressure within the capsule due to the temperature rise.
  • the invention may be used in motor cars powered by petrol or diesel engines and petrol or diesel engined boats.
  • FIG 1 illustrates diagramatically one embodiment of the invention
  • FIGS 2A, B and C illustrate the action of the arrangement shown in Figure 1 under different conditions.
  • a pipe 10 is connected at its right hand end to an exhaust manifold (not shown) of an internal combustion engine (not shown) so that exhaust gases can pass in the direction of the arrow through the pipe 10 to enter a silencer system and safely exhaust from the vehicle in known manner.
  • Blocking the pipe is a flap 12 having an actuating arm 14 extending therefrom into a side housing 15 mounted on the pipe 10.
  • the flap and arm combination 12 and 14 is hinged at 13.
  • the arm 14 is pivotally attached at 16 to one end of an expansible capsule 18 which contains gas (or more preferably a liquid having a low boiling point) , so that with a rise in temperature, the capsule will occupy the position shown in Figure 1 but at normal ambient temperatures the capsule will collapse the bellows or corrugated section so that the flap 12 is pivotted into an upright position to allow for the passage of gases through the pipe.
  • gas or more preferably a liquid having a low boiling point
  • the capsule 18 is joined to a second similar capsule 20 which is likewise corrugated so as to provide for considerable expansion and contraction.
  • the interior of the capsule 20 is connected via a pipe 22 to a source of vacuum such as to the inlet manifold of the same internal combustion engine as the exhaust pipe is connected, and a normally closed valve 24 controls the flow of gas or liquid to and from the capsule 20.
  • a control means 26 serves to control the operation of the valve 24 as will hereinafter be described.
  • the second capsule 20 is not only secured to the left hand end of the capsule 18 but is also secured at its opposite end in a fixed manner to the end 28 of the housing 15.
  • the latter is fixed relative to the pipe 10 and therefore acts as a fixed stop so that the position of the junction 16 and thereby the open or closed state of the flap 12 will be determined by the length of the capsule 20 and the length of the capsule 18 measured from the wall 28. If both capsules are pressurised and thereby expanded into the condition shown in Figure 1, the flap 12 is held firmly in the position shown thereby shutting off the passage of gases through the pipe.
  • the flap 12 is automatically raised through approximately 70° so as to open the pipe and allow the passage of gases.
  • stop means may be provided to remove the force exerted on the flap 12 in the event that both of the capsules are contracted, as by providing a stop to restrict the anti-clockwise movement of the arm 14.
  • the control 26 may take any convenient form.
  • a cable or lever mechanism connects the valve 24 to a lever or knob or other device located adjacent the driving position in a car or boat and typically hidden from view and known only to the authorised user of the vehicle.
  • control system 26 may be linked with a key switch or a keypad or a radio frequency sensor and decoder for detecting the presence of an appropriate transmitter unit carried only by an authorised user of the vehicle or an infra red sensor or an ultrasonic sensor likewise including decoder means for receiving infra red or ultra-sound signals from appropriate transmitters carried by an authorised user of the vehicle.
  • the unit may comprise a proximity detector tuned to detect the proximity of a passive circuit element similar to anti-theft tags attached to display products in stores which will generate an alarm signal in the event that the product is removed from the store without the security tag having been removed.
  • valve 24 is placed in a most inaccessible position on the motor vehicle and is armoured or otherwise protected so as to render very difficult if not impossible any tampering with the valve so as to enable an unauthorised person to open the valve.
  • spring means designated by reference numeral 30 may be provided for example within the capsule which is extended as the capsule is expanded and which provides a restoring force to collapse the capsule to its normal unextended dimension when the source of heat is removed and the contents of the capsule cool down to ordinary ambient temperatures.
  • an oil or a low boiling point liquid partially fills the capsule 18.
  • conversion of the liquid into a vapour phase can be arranged to occur at a particular elevated temperature only achieved after so many seconds of normal running of the engine so that the flap 12 is kept fully open to enable the engine to be started and if necessary to be driven away a very short distance before there is any tendency for the inhibiting closure to occur.
  • the general intent behind the invention is to cause the vehicle to become unusable very shortly after it has been driven away thereby causing the unauthorised person to panic and abandon the vehicle before it has left the marina (in the cados of a boat) or the neighbourhood where it has been parket (in the case of a car or lorry) and before it is likely that he can have done any significant damage to the vehicle as might be incurred during a police chase or the like (in the case of a car) so that the rightful owner can retrieve the vehicle with minimum inconvenience and minimal action by the police.
  • FIGS 2A to 2C indicate the different modes of operation of the device shown in Figure 1.
  • FIG 2A shows the state of the capsules at start-up when it is assumed that the exhaust system has cooled to ambient temperature.
  • the capsule 18 will have contracted to its minimum size as shown in Figure 2A but the capsule 20 will possess its normal length since valve 24 is closed and even if pipe 22 is connected to the inlet of the engine and suction appears above valve 24, no suction will be applied to the capsule 20 until the valve 24 is opened.
  • FIG. 2B shows the result of the heating up process in which the liquid or gases or both within the capsule 18 have caused the latter to expand to its full permitted length thereby rotating the cranked lever assembly 14 and tilting the flap 12 into the position shown in Figure 2B where the flap either completely or at least partially closes off the exhaust pipe.
  • valve 24 remains closed, capsule 20 remains elongated and the blocked exhaust pipe rapidly chokes the engine into either a semi-stalled condition in which little or no power can be derived from the engine or into a fully stalled state in which the engine will not operate normally.
  • the engine will remain in that condition until the capsule 18 has cooled down sufficiently to enable the flap 12 to re-open the exhaust pipe whereupon if the engine is restarted it will again run for a very short time until the capsule 18 is again heated up sufficiently to cause the flap 12 to again block the pipe whereupon the engine will again be choked into a stalled condition.
  • Figure 2C indicates the mode of operation in the event that the vehicle is in the hands of an authorised person.
  • the valve 24 will have been opened by the authorised driver so enabling the suction applied to pipe 22 to cause the capsule 20 to contract thereby moving the cranked arm 14 back into the position occupied in Figure 2A and with it the flap 12 into its aligned position enabling gases once again to pass through the pipe 10 from the engine.
  • the valve 24 is opened either before or immediately after the engine has been started it will be seen that the effect of the flap 12 will never be noticed by an authorised user of the vehicle.
  • control unit 26 is arranged to leave the valve 24 open for long enough for the pressure within the capsule 20 to balance out and enable the capsule once again to expand to its normal state such as shown in Figures 2A and 2B and as the liquid or gases or both in the capsule 18 contract so capsule 18 contracts back to the position shown in Figure 2A so that the flap 12 is retained in its aligned raised position ready for the vehicle to be started normally.
  • the anti-theft system proposed by the invention is ideally combined with any other system or systems such as those which will draw attention to the vehicle as by sounding an audible alarm to causing lights to flash.
  • the subsidiary alarm system is itself arranged only to operate when the flap 12 begins to close off the exhaust pipe so that both the audible and/or visible alarm suddenly begin to operate at the same time as the engine begins to suddently lose power and stall.
  • switching means may be located within the housing 15 sensitive to the position of the cranked arm 14 or a time delay may be associated with the ignition switch and an interlock within the control unit 26 such that if the control unit 26 has not been operated to open the valve 24 either at the same time or after the ignition has been turned on, the audibe alarm or visual alarm is armed and caused to operate so many seconds after the ignition has been turned on.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne un dispositif destiné à arrêter un moteur à combustion interne dans des véhicules pouvant se déplacer sur terre, sur l'eau, dans les airs et dans lesquels on place un dispositif d'obturation monté dans l'échappement du moteur, à l'intérieur ou en aval du collecteur d'échappement, et pouvant se mettre en position de blocage qui empêche au moins partiellement le passage des gaz d'échappement provenant du moteur, et ce en réaction à l'augmentation de la pression ou de la température des gaz d'échappement du moteur qui tourne. Le moteur démarrera ainsi normalement, s'il est froid, et tournera normalement jusqu'à ce que les gaz d'échappement provoquent le blocage de l'échappement par l'intermédiaire du dispositif d'obturation, le moteur perdra alors de la puissance et s'arrêtera. On prévoit un premier dispositif qui est sensible et réagit à l'augmentation de la pression ou de la température dans l'échappement du moteur pour permettre au dispositif d'obturation de venir en mode de blocage; on prévoit un second dispositif qui contrecarre le déplacement du premier dispositif en réaction au vide généré au niveau du collecteur d'admission du véhicule. En installant un mécanisme de verrouillage, que seul un utilisateur autorisé d'un véhicule peut actionner, ce mécanisme empêche le vide d'agir sur le second dispositif, et dans le cas d'une utilisation non autorisée du véhicule, le moteur se mettrait en route, mais seulement pour un bref instant jusqu'à ce que le dispositif d'obturation se déplace pour bloquer le passage des gaz d'échappement du moteur.
EP92920796A 1991-10-08 1992-10-07 Dispositifs anti-vol pour vehicules a moteur Withdrawn EP0607220A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9121383 1991-10-08
GB919121383A GB9121383D0 (en) 1991-10-08 1991-10-08 Anti-theft device for motor vehicles
GB929208784A GB9208784D0 (en) 1991-10-08 1992-04-23 Anti-theft devices for motor powered land and water craft
GB9208784 1992-04-23
PCT/GB1992/001826 WO1993007367A1 (fr) 1991-10-08 1992-10-07 Dispositifs anti-vol pour vehicules a moteur

Publications (1)

Publication Number Publication Date
EP0607220A1 true EP0607220A1 (fr) 1994-07-27

Family

ID=26299659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92920796A Withdrawn EP0607220A1 (fr) 1991-10-08 1992-10-07 Dispositifs anti-vol pour vehicules a moteur

Country Status (4)

Country Link
EP (1) EP0607220A1 (fr)
AU (1) AU2668592A (fr)
GB (1) GB2260367B (fr)
WO (1) WO1993007367A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9302208D0 (en) * 1993-02-04 1993-03-24 Divers William K Security device
IL127901A (en) * 1999-01-01 2001-06-14 Gilad Shimon Non-return valve
CN105946789B (zh) * 2016-07-05 2018-10-19 广东宁源科技园发展有限公司 一种车辆虚拟故障装置
CN111219722A (zh) * 2020-03-02 2020-06-02 广西金源生物化工实业有限公司 一种用于低压废气的加压燃烧装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4452197A (en) * 1982-08-11 1984-06-05 Weber Harold J Vehicle anti-theft ignition foiling device
US4690240A (en) * 1985-04-01 1987-09-01 Russo Rudolph P Anti-theft exhaust system for vehicles
WO1988007462A1 (fr) * 1987-04-01 1988-10-06 Richard Lapinski Dispositif antivol
WO1989005251A1 (fr) * 1987-12-03 1989-06-15 Millar Frederick W Dispositif de securite

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9307367A1 *

Also Published As

Publication number Publication date
GB2260367B (en) 1995-04-19
GB9221098D0 (en) 1992-11-18
WO1993007367A1 (fr) 1993-04-15
GB2260367A (en) 1993-04-14
AU2668592A (en) 1993-05-03

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