CA1229870A - Ignition circuit for a motor vehicle - Google Patents
Ignition circuit for a motor vehicleInfo
- Publication number
- CA1229870A CA1229870A CA000442371A CA442371A CA1229870A CA 1229870 A CA1229870 A CA 1229870A CA 000442371 A CA000442371 A CA 000442371A CA 442371 A CA442371 A CA 442371A CA 1229870 A CA1229870 A CA 1229870A
- Authority
- CA
- Canada
- Prior art keywords
- switch
- battery
- motor vehicle
- circuit
- solenoid
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P11/00—Safety means for electric spark ignition, not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
IGNITION CIRCUIT FOR A MOTOR VEHICLE
ABSTRACT OF THE DISCLOSURE
A safety ignition circuit for a motor vehicle includes a solenoid switch which is normally open to isolate the battery from the electrically operated devices. The solenoid switch is only connected to the battery through a circuit including the ignition switch so that the solenoid is isolated from the battery except when the ignition switch is operated. The ignition switch circuit includes a fuse for protecting that cir-cuit A timer switch can be included in parallel with the ignition switch to allow timed operation of the sole-noid switch to operate one or more of the electrically operated devices for a short period of time after leaving the motor vehicle.
ABSTRACT OF THE DISCLOSURE
A safety ignition circuit for a motor vehicle includes a solenoid switch which is normally open to isolate the battery from the electrically operated devices. The solenoid switch is only connected to the battery through a circuit including the ignition switch so that the solenoid is isolated from the battery except when the ignition switch is operated. The ignition switch circuit includes a fuse for protecting that cir-cuit A timer switch can be included in parallel with the ignition switch to allow timed operation of the sole-noid switch to operate one or more of the electrically operated devices for a short period of time after leaving the motor vehicle.
Description
7~
IGNITION CIRCUIT FOR A MOTOR VEHICLE
BACKGROUND OF THE INVENTION
This invention relates to an ignition circuit for a motor vehicle and particularly to a safety circuit which can isolate the battery from the electrical com-ponents of the motor vehicle and particularly the starter motor.
Electrical fires in motor vehicles are a serious source of danger and damage and occur despite present safety systems within the electrical circuits of the motor vehicle.
Generally, the present safety syste~s comprise merely a series of fuses which act to break the circuit in the event of an overload.
SUMMARY O~ THE I~VENTION
However, there is a clear need for ~n improved safety circuit and it is therefore one object of this i.nvention to provide such an improved circuit which can either be fitted as new equipment in a motor vehicle or can be added as a later modification.
Accordingly, the invention provides a sa~ety circuit for a motor vehicle having a battery and a plurality of el.ectrically operated devices including a ~2~
starter motor, the circuit comprising a connection fro~
said battery to said electrically operated devices, a switch interposed in said connection in a normally open condition breaking said conneckion, solenoid means oper-able to close said switch to connect the battery to said electrically operated devices, a key operated switch, a connection fro~ said battery to a fuse and from said fuse to said key operated switch, a connection fro~ said key operated switch to said ~olenoid means whereby the sole-noid means is only connected to said battery when said key operated switch is closed, and a timer operate~
switch in parallel to said key operated switch whereby to allow a timed period of operation of one or more of said electrically operable devices after opening said key operated switch.
It i~ one adv~ntage of the invention therefore that the solenoid means is only activated when the key operated switch is closed. At other times, the solenoid switch is open thus iqolating the battery fro~ the elec-trically operated devices.
It is a further advantage o~ the inv~ntion that th~ solenoid i9 completely separated from the battery except when the ignition circuit i5 clos2d and thus any short circuit in the system downstream Oe the ~olenoid _ 3 ~ 7~
and including the solenoid will not cause An overload of the circuit.
With the foregoing in view, and other advan-tages as will become apparent to those skilled in the art to which this invention relates as this specification proce2ds, the invention is herein described by reference to the accompanying drawings forming a part hereof, which includes a description of the best mode known to the applicant and of the preferred typical embodiment of the principles of the present invention, in which:
Figure 1 is a schematic illustration of an ignltion circuit of a motor vehicle.
DETAILED DESCRIPTION
A motor vehicle comprises a battery lO connect-ed on one side to earth, a fuse box 12 providing electri-cal connection to a plurality of electrically operated devices schematically indicated at 13. The devices 13 are conventional and comprise the various parts of the motor vehicle including the lights, instrument panel, horn, etc. In addition, the motor vehicle includes a starter motor schematically indicated at 14 together with a starter motor switch 15.
The conventional ~ystem is modi f ied by the pre-sent invention by the provision o~ a solenoid switch generally indicated at 16 and a key operated switch 11.
The solenoid switch includes a first terminal 161 for connection to tha battery, a second terminal 162 for communication of power from the battery to the starter motor 14 and the fuse box 12, a third terminal 163 for providing power to the solenoid and a fourth terminal 1~4 which is connected to ground and provides the power cir~
cuit through the solenoid.
Inside the solenoid switch there are provided a pair of contact points 165, 166 the first of which is connected to the terminal 161 and the second of which i5 connected to the terminal 162, and a switch contact 167 which acts to bridge the contact points 165, 166 when the switch is closed.
The switch 167 is operated by an electricalLy wound solenoid 16 which receives power from the tarminals 163, 164.
In~tead of being directly connected in series with the supply from the battery lO to the electrically operated devices 13, l4, the ~ey operated switch 11 is connected in a circuit providing a connection from tha terminal 161 through a use 17 to one side o~ the igni-tion switch 11 and a connection from the other sid~ of the ignition switch 11 to the terminal 163 o~ the sole-noid 16 .
In addition, a timer switch 18 is connected in parallel with the ignition switch 11 across the connec-tions thereof to the terminals 161 and 163. The timer switch can comprise an adjustable timer 181 and a switch 182 so that the switch 182 i~ closed by operation of the timer 181 and retained closed for a period of time until the timer automatically opens the switch 182. If desired, the ~witch 18 can include merely a simple timer which cannot be adjusted but is, for example, simply depressed to provide a set period of time before re-open-ing the switch 182.
The circuit provides a two-old safety system.
The fuse 17, which is a 4 amp fuse, constitutes the fir~t safety feature. ~Ihis ensures that any short circui~
within the connections to and fro~ the key operated switch, causes a break in the circuit rather than an electrical overload which can cause a fire. It will be noted rom the circuit that tha only electrical item within the motor vehicle directly conn~cted at all time~
to the battery, i5 th~ key operated switch and this is connected through the fu e 17~
The second ~aety feature i~ provided by the - 6 ~
solenoid switch 16. This is only connected to the bat-tery through the Xey operated switch ll and is therefore isolated from the battery when the ignition switch 11 is open thus in turn isolating from the battery, the electrically operated devices 13, 14. As the entire circuit system is therefore isolated from the battery when the key operated switch 11 i9 open and therefore the solenoid 16 is open, electrical fire is impossible.
~en the key operated switch 11 is closed by operation of the key switch, the solenoid 16 is operated through the terminals 1&3, 164 thus closing the contact points 165, 166 to supply electrical power to the elec-trically operated devices 13, 14. In this condition, the circuit is controlled through the fuse 17 and also the fuse box 12 in a conventional manner.
Should the driver wish to leave on one or more of the electrically operated devices, for example, the headlights or other lights after le~ving the motor vehicle for a period of time, this can be achieved by operating the timer 181 and then leaving the motor vehicle removing the key from the key operated switch ll.
After the period of time set by the timer 181~ the switch 182 opens thus releasing the solenoid 16 fsr movement a~ay from the contact points 165, 166 under the force fxom the spring 169.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing fro~
such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
IGNITION CIRCUIT FOR A MOTOR VEHICLE
BACKGROUND OF THE INVENTION
This invention relates to an ignition circuit for a motor vehicle and particularly to a safety circuit which can isolate the battery from the electrical com-ponents of the motor vehicle and particularly the starter motor.
Electrical fires in motor vehicles are a serious source of danger and damage and occur despite present safety systems within the electrical circuits of the motor vehicle.
Generally, the present safety syste~s comprise merely a series of fuses which act to break the circuit in the event of an overload.
SUMMARY O~ THE I~VENTION
However, there is a clear need for ~n improved safety circuit and it is therefore one object of this i.nvention to provide such an improved circuit which can either be fitted as new equipment in a motor vehicle or can be added as a later modification.
Accordingly, the invention provides a sa~ety circuit for a motor vehicle having a battery and a plurality of el.ectrically operated devices including a ~2~
starter motor, the circuit comprising a connection fro~
said battery to said electrically operated devices, a switch interposed in said connection in a normally open condition breaking said conneckion, solenoid means oper-able to close said switch to connect the battery to said electrically operated devices, a key operated switch, a connection fro~ said battery to a fuse and from said fuse to said key operated switch, a connection fro~ said key operated switch to said ~olenoid means whereby the sole-noid means is only connected to said battery when said key operated switch is closed, and a timer operate~
switch in parallel to said key operated switch whereby to allow a timed period of operation of one or more of said electrically operable devices after opening said key operated switch.
It i~ one adv~ntage of the invention therefore that the solenoid means is only activated when the key operated switch is closed. At other times, the solenoid switch is open thus iqolating the battery fro~ the elec-trically operated devices.
It is a further advantage o~ the inv~ntion that th~ solenoid i9 completely separated from the battery except when the ignition circuit i5 clos2d and thus any short circuit in the system downstream Oe the ~olenoid _ 3 ~ 7~
and including the solenoid will not cause An overload of the circuit.
With the foregoing in view, and other advan-tages as will become apparent to those skilled in the art to which this invention relates as this specification proce2ds, the invention is herein described by reference to the accompanying drawings forming a part hereof, which includes a description of the best mode known to the applicant and of the preferred typical embodiment of the principles of the present invention, in which:
Figure 1 is a schematic illustration of an ignltion circuit of a motor vehicle.
DETAILED DESCRIPTION
A motor vehicle comprises a battery lO connect-ed on one side to earth, a fuse box 12 providing electri-cal connection to a plurality of electrically operated devices schematically indicated at 13. The devices 13 are conventional and comprise the various parts of the motor vehicle including the lights, instrument panel, horn, etc. In addition, the motor vehicle includes a starter motor schematically indicated at 14 together with a starter motor switch 15.
The conventional ~ystem is modi f ied by the pre-sent invention by the provision o~ a solenoid switch generally indicated at 16 and a key operated switch 11.
The solenoid switch includes a first terminal 161 for connection to tha battery, a second terminal 162 for communication of power from the battery to the starter motor 14 and the fuse box 12, a third terminal 163 for providing power to the solenoid and a fourth terminal 1~4 which is connected to ground and provides the power cir~
cuit through the solenoid.
Inside the solenoid switch there are provided a pair of contact points 165, 166 the first of which is connected to the terminal 161 and the second of which i5 connected to the terminal 162, and a switch contact 167 which acts to bridge the contact points 165, 166 when the switch is closed.
The switch 167 is operated by an electricalLy wound solenoid 16 which receives power from the tarminals 163, 164.
In~tead of being directly connected in series with the supply from the battery lO to the electrically operated devices 13, l4, the ~ey operated switch 11 is connected in a circuit providing a connection from tha terminal 161 through a use 17 to one side o~ the igni-tion switch 11 and a connection from the other sid~ of the ignition switch 11 to the terminal 163 o~ the sole-noid 16 .
In addition, a timer switch 18 is connected in parallel with the ignition switch 11 across the connec-tions thereof to the terminals 161 and 163. The timer switch can comprise an adjustable timer 181 and a switch 182 so that the switch 182 i~ closed by operation of the timer 181 and retained closed for a period of time until the timer automatically opens the switch 182. If desired, the ~witch 18 can include merely a simple timer which cannot be adjusted but is, for example, simply depressed to provide a set period of time before re-open-ing the switch 182.
The circuit provides a two-old safety system.
The fuse 17, which is a 4 amp fuse, constitutes the fir~t safety feature. ~Ihis ensures that any short circui~
within the connections to and fro~ the key operated switch, causes a break in the circuit rather than an electrical overload which can cause a fire. It will be noted rom the circuit that tha only electrical item within the motor vehicle directly conn~cted at all time~
to the battery, i5 th~ key operated switch and this is connected through the fu e 17~
The second ~aety feature i~ provided by the - 6 ~
solenoid switch 16. This is only connected to the bat-tery through the Xey operated switch ll and is therefore isolated from the battery when the ignition switch 11 is open thus in turn isolating from the battery, the electrically operated devices 13, 14. As the entire circuit system is therefore isolated from the battery when the key operated switch 11 i9 open and therefore the solenoid 16 is open, electrical fire is impossible.
~en the key operated switch 11 is closed by operation of the key switch, the solenoid 16 is operated through the terminals 1&3, 164 thus closing the contact points 165, 166 to supply electrical power to the elec-trically operated devices 13, 14. In this condition, the circuit is controlled through the fuse 17 and also the fuse box 12 in a conventional manner.
Should the driver wish to leave on one or more of the electrically operated devices, for example, the headlights or other lights after le~ving the motor vehicle for a period of time, this can be achieved by operating the timer 181 and then leaving the motor vehicle removing the key from the key operated switch ll.
After the period of time set by the timer 181~ the switch 182 opens thus releasing the solenoid 16 fsr movement a~ay from the contact points 165, 166 under the force fxom the spring 169.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing fro~
such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims
CLAIMS:
(1) A safety circuit for a motor vehicle having a battery and a plurality of electrically operated devices including a starter motor, the circuit comprising a connection from said battery to said electrically operated devices, a switch interposed in said connection in a normally open condition breaking said connection, solenoid means operable to close said switch to connect the battery to said electrically operated devices, a key operated switch, a connection from said battery to a fuse and from said fuse to said key operated switch, a connection from said key operated switch to said solenoid means whereby the solenoid means is only connected to said battery when said key operated switch is closed, and a timer operated switch in parallel to said key operated switch whereby to allow a timed period of operation of one or more of said electrically operable devices after opening said key operated switch.
(1) A safety circuit for a motor vehicle having a battery and a plurality of electrically operated devices including a starter motor, the circuit comprising a connection from said battery to said electrically operated devices, a switch interposed in said connection in a normally open condition breaking said connection, solenoid means operable to close said switch to connect the battery to said electrically operated devices, a key operated switch, a connection from said battery to a fuse and from said fuse to said key operated switch, a connection from said key operated switch to said solenoid means whereby the solenoid means is only connected to said battery when said key operated switch is closed, and a timer operated switch in parallel to said key operated switch whereby to allow a timed period of operation of one or more of said electrically operable devices after opening said key operated switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000442371A CA1229870A (en) | 1983-12-01 | 1983-12-01 | Ignition circuit for a motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000442371A CA1229870A (en) | 1983-12-01 | 1983-12-01 | Ignition circuit for a motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1229870A true CA1229870A (en) | 1987-12-01 |
Family
ID=4126650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000442371A Expired CA1229870A (en) | 1983-12-01 | 1983-12-01 | Ignition circuit for a motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1229870A (en) |
-
1983
- 1983-12-01 CA CA000442371A patent/CA1229870A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5818122A (en) | Power supply circuit breaking apparatus for motor vehicle and power supply circuit breaking system for motor vehicle | |
| US5533589A (en) | Signal responsive vehicle disabling system | |
| US4578628A (en) | Portable battery powered electrical apparatus with improved battery pack protected against inadvertent short circuit of the battery terminals | |
| US6049140A (en) | Battery disconnection system | |
| US6211577B1 (en) | Jump start circuit for a vehicle battery | |
| US7339774B2 (en) | Automatic battery disconnect system | |
| US3825766A (en) | Electrical control apparatus | |
| US4965461A (en) | Automatic light-extinguishing circuit | |
| US4000408A (en) | Vehicular electrical safety apparatus | |
| JPH0154931B2 (en) | ||
| US3604005A (en) | Remote control by relays of components of an internal combustion engine-powered vehicle | |
| CA1229870A (en) | Ignition circuit for a motor vehicle | |
| MY105111A (en) | A security system | |
| US5455735A (en) | Safety switching device for use with power equipment | |
| US3518655A (en) | Security devices | |
| GB2158277A (en) | Continuous security alarm for current consuming equipments | |
| GB1215009A (en) | A remote warning alarm device | |
| US3251033A (en) | Motor vehicle emergency switch and signal | |
| US4291296A (en) | Engine disabling | |
| US2876429A (en) | Theft-proof circuit for automotive vehicles | |
| US4058793A (en) | Vehicle headlight warning circuit | |
| US3975645A (en) | Automobile anti-theft alarm system | |
| US2693551A (en) | Motor vehicle headlight safety relay | |
| US3891967A (en) | Antitheft alarm system for automobiles | |
| RU2208534C1 (en) | Device to protect vehicle electrical equipment with engine shut down |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |