GB2257748A - Preventing unauthorised engine operation. - Google Patents

Preventing unauthorised engine operation. Download PDF

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Publication number
GB2257748A
GB2257748A GB9113977A GB9113977A GB2257748A GB 2257748 A GB2257748 A GB 2257748A GB 9113977 A GB9113977 A GB 9113977A GB 9113977 A GB9113977 A GB 9113977A GB 2257748 A GB2257748 A GB 2257748A
Authority
GB
United Kingdom
Prior art keywords
vehicle
immobiliser
switch
deactivated
switches
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Withdrawn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
GB9113977A
Other versions
GB9113977D0 (en
Inventor
Stephen Edward Wilson
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
Application filed by Individual filed Critical Individual
Priority to GB9113977A priority Critical patent/GB2257748A/en
Publication of GB9113977D0 publication Critical patent/GB9113977D0/en
Publication of GB2257748A publication Critical patent/GB2257748A/en
Withdrawn legal-status Critical Current

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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
    • B60R25/045—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 limiting or cutting the electrical supply to the propulsion unit
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

The operation of the ignition of a diesel engine is prevented electronically by an encapsulated unit until a predetermined combination of vehicle switch actuations, e.g. head lamp flasher and horn switches, is executed. The unit may have an override switch.

Description

Vehicle Immobiliser This invention relates to a vehicle protection device Vehicle protection devices are numerous and many versions are readily available.The vehicle immobiliser is fully automatic in it's operation and does not rely,as with most current systems, on audible-alarms.It automatically prevents the vehicle's unauthorised starting thus providing a really effective deterent to the would be car thief.St is an encapsulated unit which is so designed to be unobtrusive within the vehicles engine compartment but also as compatible as possible with the vehicles standard equipment and hence virtually un detectable.
Existing vehicle protection devices do not prevent the vehicle from being driven away.They actively announce their presence and hence invite the thief to prevent their operation.The vehicle immobiliser is relatively inexpensive in comparison with such devices and the thief has no easy way of detecting it's presence.
According to the present invention the vehicle immobiliser by electronic means(as described in detail in figure7) will prevent the vehicles ignition coil from generating enough energy to produce a spark.It can fitted to a vehicle with conventional or electronic ignition systems.The immobiliser function wire,or wires, can be connected to any existing switch or switches.It can be deactivated according to the preference of the driver and the approriate combination would be known only to him.Hypothectically it could be connected to a positive going headlamp flasher switch wire only,or alternatively,to both a positive going switch wire and a negative going switch wire.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which: FIGURE 1 shows in perspective ,the vehicle immobiliser with wires exiting through the underside of the encapsulated housing.The front face shows a small switch which can be used to override the unit.
FIGURE 2 illustrates the~holes used for the mounting arrangement The 4 or 5 wires exiting the housing are 1 metre long and designated as follows.
1) BLUE to coil 2)WHITE to coil 3)BLACK to earth(Ring Tag Used) 4) YELLOW to switch 5) GREEN (May be Internally linked ) to switch FIGURE 3 shows the override switch. When switched to the off position the vehicle operates as normal and may be used for service reasons.
FIGURE 4a shows the vehicle's switch in the off position.
FIGURE 4b shows the vehicle's ignition switch in the on position in preparation for momentarily operating the selected vehicle switches.
FIGURE 5a/b shows the headlamp flasher and ,or the horn switch being operated correctly and the immobiliser being deactivated.
FIGURE 6 shows the ignition switch in the start position.
If the function switches have been operated correctly the vehicle will now start.
FIGURE 7 gives an electrical explanation of how the unit functions.
Refering to the drawing, the vehicle immobiliser is -a small plastic encapsulation which incorporates the circuitry shown in figure 7.It is hence of tamperproof construction with considerable resistance to the ingress of hostile material.The hole mounting arrangement as shown in figure 2 is provided with suitable sized hole to facilitate it's attachment to existing bolts and is internally connected to circuits OV line. The wires would be attached to their various destinations by means of tap in connectors.Figure 3 shows the override switch that disconnects the varistor from the circuit. This operation would normally be performed automatically by the momentary operation of-selected switches.

Claims (6)

Claims
1) A-vehicle immobiliser of compact encapsulated construction which can be installed unobtrusively into any vehicle and would prevent the unauthorised starting of the vehicles engine by electronic means.
2) A vehicle immobiliser as claimed in claim 1 which would prevent the unauthorised starting of the vehicle's engine with both conventional and electronic ignition systems, including diesel powered engines.
3) A vehicle immobiliser as claimed in claim 1 or 2, which can be deactivated by means of an existing switch or switches.
4) A vehicle immobiliser as claimed in claim 3 which can be deactivated by means of positive or negative going switches.
5) A vehicle immobiliser as claimed in any preceding claim wherein the immobiliser can be deactivated by means of an override switch.
6) A vehicle immobiliser substantially as described herein with reference to figures 1 to 7 of the accompanying drawings.
GB9113977A 1991-06-28 1991-06-28 Preventing unauthorised engine operation. Withdrawn GB2257748A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9113977A GB2257748A (en) 1991-06-28 1991-06-28 Preventing unauthorised engine operation.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9113977A GB2257748A (en) 1991-06-28 1991-06-28 Preventing unauthorised engine operation.

Publications (2)

Publication Number Publication Date
GB9113977D0 GB9113977D0 (en) 1991-08-14
GB2257748A true GB2257748A (en) 1993-01-20

Family

ID=10697488

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9113977A Withdrawn GB2257748A (en) 1991-06-28 1991-06-28 Preventing unauthorised engine operation.

Country Status (1)

Country Link
GB (1) GB2257748A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2297804A (en) * 1995-02-09 1996-08-14 Christopher Clifford Anti-theft vehicle engine fuel supply

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1563476A (en) * 1978-04-06 1980-03-26 Hefford R Motor vehicle ant-theft devices
US4209709A (en) * 1978-09-05 1980-06-24 BBJ Laboratories Anti-theft ignition system
GB2096236A (en) * 1981-04-03 1982-10-13 Shirazi Nasser Electronic combination security device
US4479064A (en) * 1983-03-31 1984-10-23 Monsen Dee N Safe start system for automotive vehicles
WO1985001708A1 (en) * 1983-10-14 1985-04-25 Phantom Systems Antitheft ignition system and solenoid apparatus for use therewith
GB2210484A (en) * 1987-09-29 1989-06-07 Newton Hall Electronics Limite Security system for a motor vehicle
WO1991007297A1 (en) * 1989-11-15 1991-05-30 Edwards Allen V Anti-theft control apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1563476A (en) * 1978-04-06 1980-03-26 Hefford R Motor vehicle ant-theft devices
US4209709A (en) * 1978-09-05 1980-06-24 BBJ Laboratories Anti-theft ignition system
GB2096236A (en) * 1981-04-03 1982-10-13 Shirazi Nasser Electronic combination security device
US4479064A (en) * 1983-03-31 1984-10-23 Monsen Dee N Safe start system for automotive vehicles
WO1985001708A1 (en) * 1983-10-14 1985-04-25 Phantom Systems Antitheft ignition system and solenoid apparatus for use therewith
GB2210484A (en) * 1987-09-29 1989-06-07 Newton Hall Electronics Limite Security system for a motor vehicle
WO1991007297A1 (en) * 1989-11-15 1991-05-30 Edwards Allen V Anti-theft control apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2297804A (en) * 1995-02-09 1996-08-14 Christopher Clifford Anti-theft vehicle engine fuel supply

Also Published As

Publication number Publication date
GB9113977D0 (en) 1991-08-14

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)