A METHOD AND ARRANGEMENT FOR REMOTELY CONTROLLING ONE OR MORE FUNCTIONS OF A MOTOR-DRIVEN VEHICLE

Abstract: A method for remotely controlling one or more vehicle functions. The invention is characterized in that a first coded signal transmitted by a cordless transmitter is caused to be received in a receiver (1; 16) located in the vehicle. The receiver (1; 16) includes a decoding device which is caused to detect and identify the code and to compare the code with a vehicle specific code. When agreement is found between the received code and the vehicle specific code, the receiver (1; 16) is caused to activate one or more electronic circuits in the vehicle through the agency of a control circuit (2; 12-15), such as to deactivate one or more of the vehicle functions. The invention also includes a method for receiving a second coded signal which results in the activation of those vehicle functions that were earlier deactivated. The invention also relates to devices for carrying out the method.

Description: A Method and Arrangement for Remotely Controlling One or More Functions of a Motor-Driven Vehicle The present invention relates to a method and to an arrangement for remotely controlling one or more of the functions of a motor-driven vehicle. More parti¬ cularly, the invention is concerned with fully or partially deactivating and activating a motor-driven vehicle by remote control. By partial or total deactivation of a vehicle is meant the deactivation of all vehicle functions or facili¬ ties, from the locking of certain parts of the vehicle to rendering the vehicle inoperable. By activating the vehicle is meant to bring the vehicle to an operable state from an inoperable state. The theft of vehicles in society is progressively in¬ creasing. Furthermore, it is becoming progressively more common for the return of leasing cars and rented cars to be delayed beyond the date agreed, or for such cars not to be returned at all. There is a serious need for the prevention of theft and unauthorized use of motor-driven vehicles. Theft against security vehicles is also becoming more usual. Naturally, there is a serious need to prevent theft or robbery of this nature. The theft of leisure boats has also increased. Such boats are often very valuable and the possibility of finding a stolen boat is relatively limited. The object of the present invention is to enable these problems to be greatly reduced. The present invention thus relates to a method for re¬ motely controlling one or more of the functions or facilities of a vehicle, and is characterized by transmitting a first coded signal with the aid of a cordless transmitter, this signal being received in a receiver in the vehicle; by including in the receiver a signal decoding means which detects and identifies said code and compares the code with a code that is specific to the vehicle concerned; and causing the receiver to activate, through the agency of a control circuit, one or more electronic circuits in the vehi¬ cle when agreement is found between the received code and the vehicle specific code in a manner such as to render one or more of the vehicle functions inopera¬ ble. The invention also relates to an arrangement of the kind defined in Claim 9 and having essentially the characteristic features set forth in said Claim. The invention will now be described in more detail with reference to exemplifying embodiments thereof and also with reference to the accompanying drawings, in which Figure 1 is a block schematic which illustrates one embodiment of the invention; - Figure 2 illustrates another embodiment of the invention; and Figure 3 illustrates a further embodiment of the invention. The present invention can be applied to all sorts of motor-driven vehicles, such as automobiles, lorries, trucks and transport vehicles, craft, etc. , and it will therefore be understood that the invention is not restricted to any particular type of vehicle, although the invention is primarily described in the following with reference to automobiles, security transport vehicles and leisure craft. Figure 1 illustrates one embodiment of an inventive arrangement. The arrangement illustrated in Figure 1 is intended to be installed in a vehicle in which the invention is applied. The arrangement is intended to remotely control one or more of the functions of a vehicle. These functions may include one or more of the functions reguired to drive the vehicle. For instance, one function may involve the supply of current to the vehicle engine or to the engine fuel system. In the case of modern cars equipped with a so-called inboard computer, the compu¬ ter may be programmed so that selective vehicle func¬ tions can be rendered non-functional by means of the arrangement. Another example is that one or more functions can be added to a vehicle and these further functions can be remotely controlled by means of the inventive arrange¬ ment. For instance, the electrically maneuverable locks of the vehicle doors and windows installed in the vehicle may be constructed so that doors and windows can be remotely locked and made impossible to open from within the vehicle. Those functions which are of interest are determined by what it is wished to achieve with the aid of the present invention. According to the invention, the arrangement includes a first receiver 1 which is installed in the vehicle and which is intended to receive a first coded signal transmitted by a cordless transmitter. The receiver includes a decoding device which functions to detect and identify the code and to compare the code with a vehicle specific code. When agreement is found between the received code and the vehicle specific code, the receiver 1 functions to deliver a signal to a control circuit 2, which is intended to activate one or more electronic circuits in a manner to render one or more of the vehicle functions inoperable. The vehicle receiver may have any suitable known con¬ struction. However, according to one further preferred embodiment of the invention, the receiver is a commer¬ cially available paging device or a mobile telephone located in the vehicle. Such a receiver will already include a decoding device and a comparator circuit which compares a call signal from a person paging system or mobile telephone network with a code which is specific to the paging device or to the mobile telephone. As will be known, paging devices and mobile telephones are constructed to produce an electric signal when called, i.e. when the comparator circuit detects similarity between the two aforesaid codes. Of the two possibilities mentioned, it is preferred to use a paging system, because a paging device is less expensive than a mobile telephone. The invention is described in the following with reference to the embodiment in which the receiver 1 is comprised of a paging device. According to the present invention, the arrangement includes a further receiver 3, a second receiver, of the same kind as the first-mentioned receiver, i.e. a further paging device or mobile telephone. This second receiver is also located in the vehicle and has the same function as the first-mentioned receiver. This second receiver 3 is intended to receive a second coded signal transmitted by a cordless transmitter, and is also constructed to detect and identify the code contained in the second coded signal and to compare the code with a second vehicle specific code, i.e. the code received by the second receiver. When agreement is found between the received second code and the second code specific to the vehicle, the receiver will deliver a signal to the control circuit 2. The control circuit is constructed to activate one or more electronic circuits in a manner which will render one or more of those vehicle functions that were earlier deactivated operable again. Thus, vehicle functions can be made non-functional and subsequently reinstated to a functional mode in a re- motely controlled fashion by means of the present invention. When a paging network of known kind is used, such as the kind constructed in Sweden, this will mean that, in practice, the first vehicle-located paging device can be activated by calling a number through the network and therewith render one or more vehicle functions inoperable, and that the second vehicle- located paging device can be activated so as to bring the deactivated function back to an operable state, by calling another number. According to one preferred embodiment of the inven¬ tion, the control circuit 2 includes one or more relays which are intended to break the voltage to one or more of the electrical circuits of the vehicle, so that the vehicle engine will no longer function. In Figure 1, the reference numeral 4 identifies the vehicle voltage source and the conductor 5 represents a conductor which extends to a vehicle operation central unit, such as the vehicle ignition system. For instance, the conductor 5 may be the conductor which controls the vehicle ignition relay. In the case of vehicle direct injection engines, the conductor 5 may be the conductor which delivers current to the injec¬ tion system. It is preferred that the aforesaid electronic circuits include relays which function to make-and-break the supply of current to one or more devices in the ve¬ hicle. This simplifies installation and renders such installation less expensive. The actual control circuit 2 may be a relay which is coupled so as to break the current between the current source 4 and the conductor 5 when the relay receives the signal from the paging device 1, which in the case of commercial paging devices causes a loudspeaker circuit to deliver a signal to the person carrying the paging device. With regard to the second paging device 3 of this em¬ bodiment, the device may be connected to a relay 6 which upon receipt of a signal from the paging device 3, this signal being the signal which normally opera¬ tes the loudspeaker circuit of said second device, closes the current between the voltage source 4 and the conductor 5, through conductors 7, 8. In this case, the relay 2 may be coupled so as to return to a state in which it closes the current path between the voltage source 4 and the conductor 5 when the relay 6 conducts current, i.e. when the second paging device sends a signal to the relay 6, whereupon those func- tions which were earlier non-functional will again be functional. When, in accordance with a highly important embodiment of the invention, the first coded signal is received by the receiver l, the control circuit functions to first activate a warning device 9 for warning the driver of the vehicle that one or more of the vehicle functions will cease to be operable. In the Figure 1 embodiment, the control circuit also includes a relay 10 which is coupled so that when the vehicle ignition is switched on, the relay will only conduct signals between the paging device 1 and the warning device 9, while when the ignition is switched- off, the device will only conduct signals between the paging device 1 and the relay 2. In this embodiment, the warning device is only activated when the vehicle ignition is switched on, which is necessary in order to be able to drive the vehicle. The relay -10 is conveniently controlled by a conductor 11 which carri¬ es current when the ignition is switched on, for instance a conductor 11 extending from the vehicle ignition relay. The object of the warning device is to warn the driver of the vehicle that one or more of the vital vehicle driving functions will cease to be operable within a predetermined, short period of time. This time period may for instance have a duration of from 30 to 60 seconds. The duration of this time period is adapted to enable the driver to stop the vehicle in a safe manner before, for instance, the engine stops. The warning device may be of any suitable kind, for instance a display which when energized will disclose to the driver that the engine will cut-out within 60 seconds. However, according to one preferred embodiment of the invention, the warning device includes a speech device and a ioudspeaker which is constructed to deliver a voice message which carries a warning. In this regard, the warning device may inform the driver that "The engine will stop within 60 seconds, due to activation of the vehicle safety system." The nature of the message delivered by the warning device will, of course, depend on the context in which the invention is applied. The embodiment illustrated in Figure 1 can be achieved solely with commercially available simple and inexpen¬ sive devices. For instance, the warning device may comprise a typical telephone answering device which upon receipt of a signal from the first paging device is activated to play-back a recorded warning message. Subsequent to the telephone answering device having delivered the recorded message, the device sends a signal to the control circuit 2, over a conductor 19, so as to break the connection between the voltage source 4 and the conductor 5. According to another preferred embodiment of the invention, the control circuit includes instead a computer 12 which is constructed to control the ve¬ hicle electronic circuits through the agency of con¬ ventional output circuits. This embodiment is illustrated in Figure 2. In this case, the two paging devices 1, 3 are connected to the computer. Those electronic circuits needed to influ¬ ence vehicle functions may have the form of relays or transistor circuits. These components are referenced 13, 14 and 15 in Figures 2 and 3. Those skilled in this art will be aware of how such circuits can be arranged in a manner suitable for the desired purpose. The warning device may comprise a conventional te¬ lephone answering device 9, which is activated by the computer 12. According to one particular embodiment, the control circuit 12 is constructed to control the vehicle locks and, when applicable, the electric window elevators, so as to lock the vehicle and to close the windows, whereafter the control circuit 12 is caused to break the voltage to one or more of the vehicle electric circuits so that the engine cannot be operated. In this case, people occupying the vehicle are unable to exit therefrom, either through doors or through win¬ dows. This embodiment finds particular advantage in vehicles that may be presumed to be hijacked by cri¬ minals, for instance security transport vehicles. Should a security transport vehicle be hijacked it may be achieved that by activating the first paging device the thieves are held within the locked vehicle at the same time as the vehicle stops. In this case, the ar¬ rangement will preferably be constructed so that a warning signal, when provided, will not be given until all doors and windows have been locked, but before the engine is stopped. Figure 3 illustrates another exemplifying embodiment of the invention. According to this embodiment, there is used a receiver 16 which is intended to receive transmitted signals and which is also constructed to receive and decode both the first and the second coded signal. The receiver 16 is connected to a computer 12. The computer 12 is also connected to a synthetic speech circuit 17. Alternatively, the computer can be programmed to deliver a desired speech message by generating the message in synthetic speech and sending the signal to an amplifier and loudspeaker 18. It will be obvious to all those skilled in this art that the invention can be practiced in many different forms, with respect to both the network over which the first and the second coded signal is transmitted and the functions of the vehicle to be deactivated and activated, and with respect to how a warning shall be given, when the arrangement includes such a facility. It will thus be obvious that a vehicle can be called and therewith deactivated by means of the present invention, possibly after giving a warning. This application of the invention finds particular ad¬ vantage, for instance, in the case of rented cars and leased cars which have not been returned within the contracted periods, or cars which have been purchased on credit and where the borrower has failed to keep up his/her installments. When a car which has been de¬ activated is found by the owner for instance, the owner is able to restore the vehicle to a functional state by calling the second paging device. The inventive arrangement can be used in a correspond¬ ing manner on more expensive leisure boats. In this case, however, the time lapse between delivering a warning message and the time at which the boat engine is stopped may be longer, in order to provide time for the driver of the boat to moor the vessel so as not to endanger the boat unnecessarily, for instance to avoid the boat being grounded in shallow water or driven onto land. It will also be understood that the invention can be applied in private vehicles as a supplementary anti- theft system to conventional car alarm systems. Should the vehicle be stolen, the owner is able to call the first paging device and therewith deactivate the vehicle in the aforesaid manner. The owner of the vehicle can then call the second paging device as soon as the vehicle is found. According to one further preferred embodiment of the invention, the receiver 1, in the form of a paging device or a mobile telephone which receives the first coded signal, is constructed to send a signal to the control circuit when it looses contact with the paging network or the mobile telephone network, this signal corresponding to the signal which the receiver is constructed to deliver to the control circuit when agreement is found between the received code and the vehicle specific code. This will result in one or more functions of the vehicle being deactivated. Paging networks and mobile telephone networks in Sweden, and also in other countries, are relatively well limited to the territory of the country con¬ cerned. Consequently, when the vehicle passes the borders between mutually adjacent countries, the receiver will lose contact with the network and the receiver will deliver a signal to the control circuit, as before mentioned. According to one embodiment, illustrated in Figure 3, a keyboard 20 is connected to the computer 12. In this case, the computer 12 may be constructed so that when a predetermined code is entered through the keyboard, the computer will not activate those circuits which deactivate one or more of the vehicle functions when the receiver delivers a signal to the computer in¬ dicating that the receiver has lost contact with the network, but the computer only activates said circuits when the receiver has been called in the aforesaid manner. This makes it impossible to drive the vehicle out of the country, unless the driver is aware of said code and enters it into the computer through the keyboard. As before mentioned, the present invention can be achieved in many ways obvious to those skilled in this art, and that the aforedescribed and illustrated embodiments are solely a few of the variants that can be achieved. The present invention shall not therefore be con¬ sidered restricted to the aforedescribed and illus¬ trated embodiments, since modifications and variations can be made within the scope of the following Claims.

Claims: Claims 1. A method for remotely controlling one or more of the functions of a motor vehicle, c h a r a c - t e r i z e d by transmitting a first coded signal with the aid of a cordless transmitter, receiving the signal in a receiver (1; 16) provided in the vehicle; including in the receiver (1; 16) a decoding device which functions to detect and identify said code and also to compare the code with a specific vehicle code; and causing the receiver (1; 16) to activate one or more electronic circuits in the vehicle when agreement is found between the received code and the specific vehicle code through the agency of a control circuit (2; 12-15) in a manner to deactivate one or more of the vehicle functions. 2. A method according to Claim 1, c h a r a c ¬ t e r i z e d by causing a second coded signal trans- mitted by a cordless transmitter to be received in a receiver (3; 16) in the vehicle; causing a decoding device included in the receiver (3; 16) to detect and identify said code and to compare said code with a vehicle specific code; and to cause the receiver (3; 16) to activate one or more electronic circuits in the vehicle through the agency of a control circuit (2;12- 15) when agreement is found between the received code and the vehicle specific code, so as to activate those functions of the vehicle which were earlier deactivat- ed. 3. A method according to Claim l or 2, c h a r a c¬ t e r i z e d by transmitting said coded signals to the vehicle through the agency of a mobile telephone network or a paging network. 4. A method according to Claim 1 or 3, c h a r a c¬ t e r i z e d by causing the control circuit (2; 12- 15) to break the voltage to one or more of the vehicle electrical circuits, so that the vehicle engine can no longer operate. 5. A method according to Claim 1, 3 or 4, c h a r a c t e r i z e d by causing the control cir¬ cuit (2; 12-15) to control the vehicle locking system and, when applicable, the vehicle window elevating system, so as to lock the vehicle and close the win¬ dows and by then causing the control circuit (2; 12- 15) to break the voltage to one or more of the vehicle electrical circuits so as to deactivate the engine of the vehicle. 6. A method according to Claim 1, 3, 4 or 5, c h a r a c t e r i z e d by causing the control cir¬ cuit (2; 12-15) to activate a warning device (9) so as to warn the driver of the vehicle that one or more of vehicle functions will cease to' operate, when the vehicle receiver (1; 16) receives a signal indicating that the control circuit (2; 12-15) shall activate one or more electronic circuits in a manner to deactivate one or more of the vehicle functions. 7. A method according to Claim 6, c h a r a c - t e r i z e d in that the warning device (9) includes a loudspeaker which delivers a speech warning. 8. A method according to any one of Claims 3-7, c h a r a c t e r i z e d by causing the receiver (1) , in the form of a paging device or a mobile tele¬ phone intended to receive the first coded signal, to deliver a signal to the control circuit (2; 12-15) when said receiver looses contact with the paging network or the mobile telephone network, said signal corresponding to the signal which the receiver de¬ livers to the control circuit when agreement is found between the received code and the vehicle specific code. 9. An arrangement for remotely controlling one or more of the functions of a vehicle, c h a r a c ¬ t e r i z e d in that the arrangement includes a re¬ ceiver (1; 16) which is located in the vehicle and which is intended to receive a first coded signal transmitted by a cordless transmitter; in that the receiver (1: 16) includes a decoding device which is constructed to detect and identify said code and to compare said code with a vehicle specific code; and in that the receiver (1; 16) is constructed to deliver a signal to a control circuit (2; 12-15) when agreement is found between the received code and the vehicle specific code, said control circuit being constructed to activate one or more electronic circuits in the vehicle in a manner to deactivate one or more of the vehicle functions. 10. An arrangement according to Claim 9, c h a ¬ r a c t e r i z e d in that the arrangement includes a receiver (3; 16) which is located in the vehicle and which is intended to receive a second coded signal transmitted by a cordless transmitter; in that the receiver includes a decoding device which is con¬ structed to detect and identify said code and to compare said code with a vehicle specific code; and in that the receiver (3; 16) is intended to deliver a signal to a control circuit (2; 12-15) when agreement is found between the received code and the vehicle specific code, said control circuit (2; 12-15) being constructed to activate one or more electronic cir¬ cuits in the vehicle in a manner to reactivate one or more of those vehicle functions which were earlier deactivated. 11. An arrangement according to Claim 9 or 10, c h a r a c t e r i z e d in that the receiver (1; 16) is constructed to receive coded signal which is transmitted to the vehicle over a mobile telephone network or a paging network. 12. An arrangement according to Claim 9 or 11, c h a r a c t e r i z e d in that the control circuit (2; 12-15) is constructed to interrupt the voltage to one or more of the vehicle electric circuits so as to deactivate the vehicle engine. 13. An arrangement according to Claim 9, 11 or 12, c h a r a c t e r i z e d in that the control circuit (2; 12-15) is constructed to control the vehicle locking system and, when applicable, to control the electric window elevators, so that the vehicle can be locked and the windows closed, whereafter the control circuit (2; 12-15) is caused to interrupt the voltage to one or more of the vehicle electric circuits so as to deactivate the engine of the vehicle. 14. An arrangement according to Claim 8, 11, 12 or 13, c h a r a c t e r i z e d in that when the first coded signal is received by the receiver (1; 16) , the control circuit (2; 12-15) will function to first activate a warning device (9) which warns the driver of the vehicle that one or more of the vehicle func¬ tions are about to be deactivated. 15. An arrangement according to Claim 14, c h a¬ r a c t e r i z e d in that the warning device (9) includes a speech device and a loudspeaker for delive¬ ring a warning in the form of a speech message. 16. An arrangement according to any one of Claims 9- 15. c h a r a c t e r i z e d in that the vehicle receiver (1; 16) and the decoding device are included in a paging device or a mobile telephone located in the vehicle. 17. An arrangement according to any one of Claims 9- 16, c h a r a c t e r i z e d in that the control circuit (12-15) includes a computer (12) which con¬ trols the electronic circuits of the vehicle. 18. An arrangement according to any one of Claims 9- 17, c h a r a c t e r i z e d in that the electronic circuits include relays (2, 6; 13-15) which function to break and make the supply of current to one or more devices belonging to the vehicle. 19. An arrangement according to any one of Claims 11-18, c h a r a c t e r i z e d in that the re¬ ceiver (1) has the form of a paging device or a mobile telephone and is intended to receive the first coded signal and to deliver a signal to the control circuit (2; 12-15) when the receiver looses contact with the paging network or the mobile telephone network, said signal corresponding to the signal which the receiver is intended to deliver to the control circuit when agreement is found between the received coded signal and the vehicle specific code.

Inventors: NYFELT LEIF, NYFELT, LEIF
Applicants: SCARINUS DEV AB, SCARINUS DEVELOPMENT AB
Application year: 1993
Main classification: B60R25
IPC codes: B60R25