CA1073037A - Opto-electronic ignition systems for internal combustion engines - Google Patents
Opto-electronic ignition systems for internal combustion enginesInfo
- Publication number
- CA1073037A CA1073037A CA256,761A CA256761A CA1073037A CA 1073037 A CA1073037 A CA 1073037A CA 256761 A CA256761 A CA 256761A CA 1073037 A CA1073037 A CA 1073037A
- Authority
- CA
- Canada
- Prior art keywords
- transistor
- photo
- darlington
- opto
- radiation
- 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
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An opto-electronic ignition system for an internal combustion engine in which radiation falls on to and is cut off from a photo-transistor in timed sequence with the engine, and in which between the photo-transistor and the primary winding of the ignition coil there is a plurality of switching Darlington pairs, each Darlington switching in inverse relation to its neighbour, and the first Darlington switching in inverse relation with the photo-transistor.
An opto-electronic ignition system for an internal combustion engine in which radiation falls on to and is cut off from a photo-transistor in timed sequence with the engine, and in which between the photo-transistor and the primary winding of the ignition coil there is a plurality of switching Darlington pairs, each Darlington switching in inverse relation to its neighbour, and the first Darlington switching in inverse relation with the photo-transistor.
Description
`~` 1073~37 The present invention relates to opto-electronic ignition systems such as disclosed in our Canadian Patent Nos. 879,285 and 932,382.
In these prior Patents the transistors which form the bistable trigger are arranged to switch in inverse relation to one another, so that if any one transistor is fully saturated, its neighbours are non-conductive.
The purpose of this type of bistable trigger is to ensure that at any instant of time there is always one transistor fully conductive to act as a short-circùit path for any transients on the line.
It is an object of the present invention to extend this basic principle of inverse switching transistors to the use of Darlington pairs.
Due to a rapid advance in lntegrated circuitry over the last few years, it is advantageous to form as many of the components as possible on a monolithic chip, together with the photo-detector. This provides an article which is not only very compact, but which is very cheap to manu-facture. It is a further object of the invention to achieve a monolithic construction for a number of the components.
, According to the present invention, there is provided an opto-, electronic ignition system for controlling switching of the primary winding `J of an ignition coil of an internal combustion engine, said system compris-ing a source of radiation; a photo-transistor sensitive to radiation which will switch on or conduct when exposed to the radiation and switch off when , the radiation is cut off; means disposed between said source and said photo-, transistor for intermittently blocking radiation from said source in timed relation to the engine revolutions so as to control the periods during which radiation is received by said photo-transistor; and a switching circuit for controlling switching of the ignition coil responsive to the output of said photo-transistor; said switching circuit comprising a plurality of ~ pairs of transistors the components of each pair being connected in a i~ Darlington configuration and means for connecting said pairs of transistors to each other between said photo-transistor and the ignition coil such ~`, that each Darlington pair switches in inverse relationship to at least one other Darlington pair and a first Darlington pair _ _ .~ .. . .. . . .
.
.
1073~37 switches in inverse relationship to said photo-transistor, so as to cause fast switching of the primary winding of the ignition coil thereby inducing a spark voltage in the second winding of the coil.
'rhe Darlington pairs, with the possible exception of the last in the circuit, which may be a power Darlington pair, may be formed on a monolithic chip, together with the photo-transistor.
A diode may be connected between each junctlon of the Darlington pairs of the circuit, and the commoned emitter electrodes of all the second transistors of the Darlington pairs.
Additional features already disclosed in our Canadian Patent No. 932,382 may include ~:
(a) the provision of a diode across the emitter-collector path of the photo-transistor;
.~ .
~' ,, (b) at least one zener diode connected between the commoned collector electrodes of the transistors fonming the Darlington pair of the~ last stage of the circuit and the base electrode of the first transistor of said Darlington pair; and (c) a zener diode across the radiation source, which is preferably a gallium arsenide lamp,and the photo-transistor.
The present invention will now be described in greater detail, by way of example, with reference to the accompanying drawing, wherein the sole figure is a circuit diagram of one preferred form of an opto-electronic ignition system.
Referring to the drawing, the circuit includes a solid state gallium arsenide lamp 1, a photo-- ; transistor 2 and two pairs of D æ lington pairs Q1 and Q2. The lamp 1 and the photo-transistor 2 are . .
each in series with respective resistors R1 and R2, and receive a 7.S volt stabilized supply fxom a zener ~; ~ 20 diode Z1. The zener diode is connected across the 12 volt battery of the vehicle through a resistor R3.
Connected across the emitter-collector electrodes of the photo-transistor 2 is a diode D1, which serves not only to ensure clean switching of the photo-transistor 2, but ensures that any negative transients on the line during the time that the photo-transistor ' - -:
is non-conductive are conducted past the photo-transistor, and are thus unable to cause any damage to its structuxe.
The Darlington pairs Q1 and Q2 each consist of a pair of transistors T1, T2 and T3, T4 respectively, arranged in conventional Darlington configura~ion.
The base electrode of the transistor T1 is connected to the collector electrode of the photo-transistor 2.
The commoned collector electrodes of the transistors .-~ 10 T1 and T2 are connected firstly to the base electrode , of the transistor T3 of the second Darlington pair Q2 through a diode D3 and, secondly, to the 7.5 volt ~ , zenered supply through a resistor R4.
A diode D2 is connected across the commoned .
collector electrodes of the transistors T1 and T2, ~ - -and the emitter electrode of the transistor T2. The ~
:: -diode D2 serves to protect the Darlington pairs against ~`
negative going transients, and also against a careless - mechanic connecting the battery the wTong way around.
.: . :
The diode D1 also serves to protect the photo-transistor
In these prior Patents the transistors which form the bistable trigger are arranged to switch in inverse relation to one another, so that if any one transistor is fully saturated, its neighbours are non-conductive.
The purpose of this type of bistable trigger is to ensure that at any instant of time there is always one transistor fully conductive to act as a short-circùit path for any transients on the line.
It is an object of the present invention to extend this basic principle of inverse switching transistors to the use of Darlington pairs.
Due to a rapid advance in lntegrated circuitry over the last few years, it is advantageous to form as many of the components as possible on a monolithic chip, together with the photo-detector. This provides an article which is not only very compact, but which is very cheap to manu-facture. It is a further object of the invention to achieve a monolithic construction for a number of the components.
, According to the present invention, there is provided an opto-, electronic ignition system for controlling switching of the primary winding `J of an ignition coil of an internal combustion engine, said system compris-ing a source of radiation; a photo-transistor sensitive to radiation which will switch on or conduct when exposed to the radiation and switch off when , the radiation is cut off; means disposed between said source and said photo-, transistor for intermittently blocking radiation from said source in timed relation to the engine revolutions so as to control the periods during which radiation is received by said photo-transistor; and a switching circuit for controlling switching of the ignition coil responsive to the output of said photo-transistor; said switching circuit comprising a plurality of ~ pairs of transistors the components of each pair being connected in a i~ Darlington configuration and means for connecting said pairs of transistors to each other between said photo-transistor and the ignition coil such ~`, that each Darlington pair switches in inverse relationship to at least one other Darlington pair and a first Darlington pair _ _ .~ .. . .. . . .
.
.
1073~37 switches in inverse relationship to said photo-transistor, so as to cause fast switching of the primary winding of the ignition coil thereby inducing a spark voltage in the second winding of the coil.
'rhe Darlington pairs, with the possible exception of the last in the circuit, which may be a power Darlington pair, may be formed on a monolithic chip, together with the photo-transistor.
A diode may be connected between each junctlon of the Darlington pairs of the circuit, and the commoned emitter electrodes of all the second transistors of the Darlington pairs.
Additional features already disclosed in our Canadian Patent No. 932,382 may include ~:
(a) the provision of a diode across the emitter-collector path of the photo-transistor;
.~ .
~' ,, (b) at least one zener diode connected between the commoned collector electrodes of the transistors fonming the Darlington pair of the~ last stage of the circuit and the base electrode of the first transistor of said Darlington pair; and (c) a zener diode across the radiation source, which is preferably a gallium arsenide lamp,and the photo-transistor.
The present invention will now be described in greater detail, by way of example, with reference to the accompanying drawing, wherein the sole figure is a circuit diagram of one preferred form of an opto-electronic ignition system.
Referring to the drawing, the circuit includes a solid state gallium arsenide lamp 1, a photo-- ; transistor 2 and two pairs of D æ lington pairs Q1 and Q2. The lamp 1 and the photo-transistor 2 are . .
each in series with respective resistors R1 and R2, and receive a 7.S volt stabilized supply fxom a zener ~; ~ 20 diode Z1. The zener diode is connected across the 12 volt battery of the vehicle through a resistor R3.
Connected across the emitter-collector electrodes of the photo-transistor 2 is a diode D1, which serves not only to ensure clean switching of the photo-transistor 2, but ensures that any negative transients on the line during the time that the photo-transistor ' - -:
is non-conductive are conducted past the photo-transistor, and are thus unable to cause any damage to its structuxe.
The Darlington pairs Q1 and Q2 each consist of a pair of transistors T1, T2 and T3, T4 respectively, arranged in conventional Darlington configura~ion.
The base electrode of the transistor T1 is connected to the collector electrode of the photo-transistor 2.
The commoned collector electrodes of the transistors .-~ 10 T1 and T2 are connected firstly to the base electrode , of the transistor T3 of the second Darlington pair Q2 through a diode D3 and, secondly, to the 7.5 volt ~ , zenered supply through a resistor R4.
A diode D2 is connected across the commoned .
collector electrodes of the transistors T1 and T2, ~ - -and the emitter electrode of the transistor T2. The ~
:: -diode D2 serves to protect the Darlington pairs against ~`
negative going transients, and also against a careless - mechanic connecting the battery the wTong way around.
.: . :
The diode D1 also serves to protect the photo-transistor
2 against reverse battery connection.
The commoned collector electrodes of the transis-: ~ .
~ tors T3 and T4 are connected to one end of the primary ~j :
- winding of the ignition coil 4, the other end of which is connected to the positive terminal of the 12 volt battery. Between the commoned collector electrodes of , ~ .
.~ . .
.
~ .
.
. . - . . .
'.,;' - . . ' ~ . ' . .: .
, .
the transistors T3 and T4, and the base electrode of the transistor T3, there is connected a series circuit comprising a pair of zener diodes Z2 and Z3, and a resistor R5. The purpose of this circuit is, firstly, to control the rate of switching of the Darlington pair Q2 and, secondly, to protect ~he Darlington pair against positive going transients, as explained in our Canadian Patent No. 932,382.
In one preferred form, the Darlington pair Q2 is a power Darlington pair, thus ensuring sufficient current carrying capacity to handle the currents flow-ing through the primary winding of the coil when the magnetic field of the coil is being built up.
In the above described embodiment, the photo-transistor 2, and the Darlington pairs Ql and Q2 all switch in inverse relation to one another. Thus, when the photo-transistor 2 receives the infra-red radiation from the solid-state lamp 1, it will switch on in the fully saturated condition, which means that : 20 the Darlington pair Ql is non-conductive whilst the Darlington pair Q2 is fully on, passing the ignition coil current through the primary winding of the coil 4. As soon as the infra-red radiation is cut off from the photo-transistor 2, it is rendered non- -~
conductive, which switches the Darlington pair Ql : on, and the Darlington pair Q2 off. When the Darlington , ~
.. - .~ ~- . .
: :
pair Q2 switches off the primary current is inter-rupted to cause the collapse of the magnetic field associated with the coil 4, and the induction of a high voltage in the secondary winding to produce the spark.
It will be appreciated that where it is desir-ed to switch in the reverse mode, i.e. the spark is produced when the photo-transistor 2 is rendered con-ductive, all that is necessary is to introduce a further Darlington pair in the chain of Darlington pairs.
The switching on and off of the photo-transistor ; 2 is achieved by means of a bladed disc 3, such as disclosed in our Canadian Patent No. 932,382, or an apertured disc, `~
such as the type disclosed for the first trigger in our double trigger Canadian Patent No. 984>935. Preferably, where the disc is driven fro~ the cam shaft of the engine, ~-the number of apertures or slots is equal to the number of cylinders in the engine, but if the disc is not mounted within the distributor housing, as is conventional, the number of slots or apertures may be a ~ultiple or sub-multiple o~ the number of cylinders in the engine.
The Darlington pair Ql, or in the case of the re-verse de switching trigger, the first two Darlington psirs in the circuit, ~ay be for-ed on a =onolithic ~.' .
,.... . ~
.. .. . . .
, chip, together with the photo-transistor 2, the diode Dl and the resistors R2 and R4, appropriate interconnections being made by well known integrated circuit teclmiques. In this construction, the mono- I
lithic chip is mounted within the distributor housing opposite the gallium arsenide lamp 1, between which the blades of the chopper disc 3 rotate. The photo- ¦
area of the photo-transistor 2 would occupy between one quarter and one half the total area of one face of the monolithic chip, being off-set with respect to ; the centre of the chip, and preferably occupying an area on one side of the central axis of the chip.
The Darlington pair Ql and associated resistors R2 -j and R4 together with the diode Dl are formed on the lS remaining area of the face o the chip and appropriately connected. The power Darlington pair is mounted on a separate heat sink outside the distributor housing, together with the resistors R3 and R5, the zener diodes Zl to Z3, and the diodes D2 and D3.
` 20 Alternatively, in cases where heat dissipation is not a serious problem, the power Darlington pair may also be formed on the monolithic chip.
Although in the above embodiment there are two series connected zener diodes across the Darlington -pair Q2, it is possible to provide only a single zener diode if the voltage rating is high enough .
.. . . . . . . . ..
, : ;, .
to effect satisfactory operation of the Darlington pair in the presence of trsnsients.
It will be appreciated that the chain of Darlington pairs can have two, four or six pairs for one mode of switching, or three, five or seven pairs for the reverse mode of switching. It will be further appreciated that a diode is inserted between each Darlington pair and earth.
Whilst the preferred foTm shown in the drawing~
utilizes a bladed or apertured disc, it would be possible to use any other form of interrupting device, such as a slotted or apertured drum or cup.
The circuit shown in the drawing may readily be adapted to be incorporated into the circuits disclosed in -our Canadian Patent Nos. 984,935 and 1,018,245 and our -Canadian Patent No. 1,049,609. For example, in Canadian Patent No. 1,018,245, in the block diagram shown in Figure 1, the first trigger 11 and the second trigger 12 would each comprise the photo-transistor 2, the Darlington pair Ql, associated resistors R2 and R4, and the diodes Dl and D3. A second Darlington pair switching in in~erse relation to the first pair could be added if necessary.
In each case, the components comprising the first and second triggers could be formed either on a single monolithic chip or two separate monolithic chips mounted side by side.
-
The commoned collector electrodes of the transis-: ~ .
~ tors T3 and T4 are connected to one end of the primary ~j :
- winding of the ignition coil 4, the other end of which is connected to the positive terminal of the 12 volt battery. Between the commoned collector electrodes of , ~ .
.~ . .
.
~ .
.
. . - . . .
'.,;' - . . ' ~ . ' . .: .
, .
the transistors T3 and T4, and the base electrode of the transistor T3, there is connected a series circuit comprising a pair of zener diodes Z2 and Z3, and a resistor R5. The purpose of this circuit is, firstly, to control the rate of switching of the Darlington pair Q2 and, secondly, to protect ~he Darlington pair against positive going transients, as explained in our Canadian Patent No. 932,382.
In one preferred form, the Darlington pair Q2 is a power Darlington pair, thus ensuring sufficient current carrying capacity to handle the currents flow-ing through the primary winding of the coil when the magnetic field of the coil is being built up.
In the above described embodiment, the photo-transistor 2, and the Darlington pairs Ql and Q2 all switch in inverse relation to one another. Thus, when the photo-transistor 2 receives the infra-red radiation from the solid-state lamp 1, it will switch on in the fully saturated condition, which means that : 20 the Darlington pair Ql is non-conductive whilst the Darlington pair Q2 is fully on, passing the ignition coil current through the primary winding of the coil 4. As soon as the infra-red radiation is cut off from the photo-transistor 2, it is rendered non- -~
conductive, which switches the Darlington pair Ql : on, and the Darlington pair Q2 off. When the Darlington , ~
.. - .~ ~- . .
: :
pair Q2 switches off the primary current is inter-rupted to cause the collapse of the magnetic field associated with the coil 4, and the induction of a high voltage in the secondary winding to produce the spark.
It will be appreciated that where it is desir-ed to switch in the reverse mode, i.e. the spark is produced when the photo-transistor 2 is rendered con-ductive, all that is necessary is to introduce a further Darlington pair in the chain of Darlington pairs.
The switching on and off of the photo-transistor ; 2 is achieved by means of a bladed disc 3, such as disclosed in our Canadian Patent No. 932,382, or an apertured disc, `~
such as the type disclosed for the first trigger in our double trigger Canadian Patent No. 984>935. Preferably, where the disc is driven fro~ the cam shaft of the engine, ~-the number of apertures or slots is equal to the number of cylinders in the engine, but if the disc is not mounted within the distributor housing, as is conventional, the number of slots or apertures may be a ~ultiple or sub-multiple o~ the number of cylinders in the engine.
The Darlington pair Ql, or in the case of the re-verse de switching trigger, the first two Darlington psirs in the circuit, ~ay be for-ed on a =onolithic ~.' .
,.... . ~
.. .. . . .
, chip, together with the photo-transistor 2, the diode Dl and the resistors R2 and R4, appropriate interconnections being made by well known integrated circuit teclmiques. In this construction, the mono- I
lithic chip is mounted within the distributor housing opposite the gallium arsenide lamp 1, between which the blades of the chopper disc 3 rotate. The photo- ¦
area of the photo-transistor 2 would occupy between one quarter and one half the total area of one face of the monolithic chip, being off-set with respect to ; the centre of the chip, and preferably occupying an area on one side of the central axis of the chip.
The Darlington pair Ql and associated resistors R2 -j and R4 together with the diode Dl are formed on the lS remaining area of the face o the chip and appropriately connected. The power Darlington pair is mounted on a separate heat sink outside the distributor housing, together with the resistors R3 and R5, the zener diodes Zl to Z3, and the diodes D2 and D3.
` 20 Alternatively, in cases where heat dissipation is not a serious problem, the power Darlington pair may also be formed on the monolithic chip.
Although in the above embodiment there are two series connected zener diodes across the Darlington -pair Q2, it is possible to provide only a single zener diode if the voltage rating is high enough .
.. . . . . . . . ..
, : ;, .
to effect satisfactory operation of the Darlington pair in the presence of trsnsients.
It will be appreciated that the chain of Darlington pairs can have two, four or six pairs for one mode of switching, or three, five or seven pairs for the reverse mode of switching. It will be further appreciated that a diode is inserted between each Darlington pair and earth.
Whilst the preferred foTm shown in the drawing~
utilizes a bladed or apertured disc, it would be possible to use any other form of interrupting device, such as a slotted or apertured drum or cup.
The circuit shown in the drawing may readily be adapted to be incorporated into the circuits disclosed in -our Canadian Patent Nos. 984,935 and 1,018,245 and our -Canadian Patent No. 1,049,609. For example, in Canadian Patent No. 1,018,245, in the block diagram shown in Figure 1, the first trigger 11 and the second trigger 12 would each comprise the photo-transistor 2, the Darlington pair Ql, associated resistors R2 and R4, and the diodes Dl and D3. A second Darlington pair switching in in~erse relation to the first pair could be added if necessary.
In each case, the components comprising the first and second triggers could be formed either on a single monolithic chip or two separate monolithic chips mounted side by side.
-
Claims (13)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An opto-electronic ignition system for controlling switching of the primary winding of an ignition coil of an internal combustion engine, said system comprising a source of radiation; a photo-transistor sensitive to radiation which will switch on or conduct when exposed to the radiation and switch off when the radiation is cut off; means disposed between said source and said photo-transistor for intermittently blocking radiation from said source in timed relation to the engine revolutions so as to control the periods during which radiation is received by said photo-transistor; and a switching circuit for controlling switching of the ignition coil responsive to the output of said photo-transistor; said switching circuit comprising a plurality of pairs of transistors the components of each pair being connect ed in a Darlington configuration and means for connecting said pairs of transistors to each other between said photo-transistor and the ignition coil such that each Darlington pair switches in inverse relationship to at least one other Darlington pair and a first Darlington pair switches in inverse relationship to said photo-transistor, so as to cause fast switching of the primary winding of the ignition coil thereby inducing a spark voltage in the second winding of the coil.
2. An opto-electronic ignition system according to claim 1, wherein the radiation source is a gallium arsenide lamp emitting radiation in the infra-red region of the electro-magnetic spectrum.
3. An opto-electronic ignition system according to claim 1, wherein the last Darlington pair in the circuit is a Darlington power pair, the emitter-collector path of the second transistor being connected in series with the primary winding of the ignition coil.
4. An opto-electronic ignition system according to claim 3, wherein means are provided for protecting the Darlington power transistor against transients and for slowing down the fast switch off of said power Darlington pair.
5. An opto-electronic ignition system according to claim 4, wherein said Darlington power transistor protection means includes a parallel circuit consisting of a capacitor and at least one zener diode, and a resistor connected in series therewith, said parallel circuit being connected between the commoned collector electrodes and the base electrode of the first tran-sistor of the Darlington power pair.
6. An opto-electronic ignition system according to claim 4, wherein a diode is connected between the emitter electrode of the second transistor and the base electrode of the first transistor of the Darlington power pair, to thereby protect the Darlington power pair against negative going transients.
7. An opto-electronic ignition system according to claim 2, wherein a zener diode is connected across both the gallium arsenide lamp, the photo-transistor and the first Darlington pair to provide a stabilized voltage source therefor.
8. An opto-electronic ignition system according to claim 2, wherein a first diode is connected across the emitter-collector path of the photo-transistor, and a second diode is connected across the gallium arsenide lamp.
9. An opto-electronic ignition system according to claim 1, wherein there is an even number of Darlington pairs in the transistorized ignition circuit, the spark for ignition being produced on de-energization of the photo-transistor.
10. An opto-electronic ignition system according to claim 1, wherein there is an odd number of Darlington pairs in the transistorized ignition circuit, the spark for ignition being produced on energization of the photo-transistor.
11. An opto-electronic ignition system according to claim 3, wherein the photo-transistor and the Darlington pair or pairs, other than the power Darlington pair are formed on the same monolithic chip.
12. An opto-electronic ignition system according to claim 11, wherein the photo-area of the photo-transistor occupies between one quarter and one half of the total area of one face of the monolithic chip.
13. An opto-electronic ignition system for controlling switching of the primary winding of an ignition coil of an internal combustion engine, said system comprising an infra-red solid-state source of radiation; a photo-transistor sensitive to infra-red radiation which will switch on or conduct when exposed to the radiation and switch off when the radiation is cut off;
means arranged between said infra-red radiation source and said photo-tran-sistor for intermittently blocking radiation from said infra-red source in timed relation to the engine revolutions so as to control the periods during which the infra-red radiation is received by said photo-transistor, and a switching circuit for controlling switching of the ignition coil responsive to the output of said photo-transistor, said switching circuit comprising first and second pairs of transistors connected in a Darlington configuration and means for connecting said pairs of transistors to each other between said photo-transistor and the ignition coil such that the two Darlington pairs switch in inverse relationship to each other and the said first Darlington pair switches in inverse relationship to said photo-transistor so as to cause fast switching of the primary winding of the ignition coil thereby inducing a spark voltage in the second winding of the coil.
means arranged between said infra-red radiation source and said photo-tran-sistor for intermittently blocking radiation from said infra-red source in timed relation to the engine revolutions so as to control the periods during which the infra-red radiation is received by said photo-transistor, and a switching circuit for controlling switching of the ignition coil responsive to the output of said photo-transistor, said switching circuit comprising first and second pairs of transistors connected in a Darlington configuration and means for connecting said pairs of transistors to each other between said photo-transistor and the ignition coil such that the two Darlington pairs switch in inverse relationship to each other and the said first Darlington pair switches in inverse relationship to said photo-transistor so as to cause fast switching of the primary winding of the ignition coil thereby inducing a spark voltage in the second winding of the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA256,761A CA1073037A (en) | 1976-07-12 | 1976-07-12 | Opto-electronic ignition systems for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA256,761A CA1073037A (en) | 1976-07-12 | 1976-07-12 | Opto-electronic ignition systems for internal combustion engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1073037A true CA1073037A (en) | 1980-03-04 |
Family
ID=4106411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA256,761A Expired CA1073037A (en) | 1976-07-12 | 1976-07-12 | Opto-electronic ignition systems for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1073037A (en) |
-
1976
- 1976-07-12 CA CA256,761A patent/CA1073037A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2136123A1 (en) | Microprocessor controlled capacitor discharge ignition system | |
| US4361129A (en) | Ignition system for internal combustion engines | |
| US3395686A (en) | Blocking oscillator circuit and capacitor discharge ignition system employing the blocking oscillator circuit | |
| US3878824A (en) | Internal combustion engine magneto ignition system of the shunt switch type | |
| US4122814A (en) | Opto-electronic ignition systems for internal combustion engines | |
| US4446841A (en) | Photoelectric isolation circuit for an internal combustion engine ignition system | |
| CA1044750A (en) | Ignition system for internal combustion engines having timing stabilizing means | |
| US4171687A (en) | Revolution limiters | |
| EP0009957A1 (en) | Four lead monolithic Darlington and opto-electronic ignition system incorporating it | |
| US4436076A (en) | Electronic speed control for capacitor discharge ignition system | |
| US3835350A (en) | High energy output inductive ignition system | |
| RU2169287C2 (en) | Ignition system output stage | |
| US4176643A (en) | Pulse generating and distributing circuits for internal combustion engines or the like | |
| CA1073037A (en) | Opto-electronic ignition systems for internal combustion engines | |
| US3940658A (en) | Electronic ignition control system | |
| RU98107165A (en) | IGNITION CIRCUIT | |
| US5056481A (en) | Magneto-semiconductor ignition system | |
| US4491122A (en) | Anti-reverse operation of solid state inductive magneto | |
| US3622837A (en) | Transistorized capacitor-discharge system | |
| US5755199A (en) | Discharge ignition apparatus for internal combustion engine having built-in overspeed disable capability | |
| JPH0299763A (en) | Ignitor for internal combustion engine | |
| USRE30418E (en) | Opto-electronic ignition systems for internal combustion engines | |
| GB1168224A (en) | Improvements in Voltage Cut-Off Circuits | |
| US4346690A (en) | CD Ignition with isolation circuit to provide immediate recharging of the charge capacitor | |
| US4433668A (en) | Capacitor discharge ignition system having a charging control means |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |