US3319617A - Spark ignition systems for internal combustion engines - Google Patents
Spark ignition systems for internal combustion engines Download PDFInfo
- Publication number
- US3319617A US3319617A US325661A US32566163A US3319617A US 3319617 A US3319617 A US 3319617A US 325661 A US325661 A US 325661A US 32566163 A US32566163 A US 32566163A US 3319617 A US3319617 A US 3319617A
- Authority
- US
- United States
- Prior art keywords
- contact breaker
- capacitor
- gate
- inductor
- rectifier
- 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 - Lifetime
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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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/05—Layout of circuits for control of the magnitude of the current in the ignition coil
- F02P3/051—Opening or closing the primary coil circuit with semiconductor devices
-
- 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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/0407—Opening or closing the primary coil circuit with electronic switching means
- F02P3/0435—Opening or closing the primary coil circuit with electronic switching means with semiconductor devices
-
- 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
- F02P9/00—Electric spark ignition control, not otherwise provided for
- F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
Definitions
- This invention relates to spark ignition systems for internal combustion engines, of the kind in which current flow in a winding controls the discharge across a spark plug of the engine.
- the winding may be the primary winding of a transformer having the plug in its secondary circuit. However, where low-voltage plugs are used the plug may be fed from the winding.
- the present invention makes use of a device known as a controlled rectifier, the characteristic of which is that if a triggering pulse is applied between its gate and cathode terminals the rectifier becomes conductive, and thereafter continues to conduct, even when the triggering pulse is removed, until the anode-cathode current falls to zero.
- controlled rectifiers manufactured in a certain manner have the additional property that they can be switched oif by a pulse of opposite polarity (but not necessarily of equal magnitude) applied between the gate and cathode.
- switchable rectifier is used to mean a controlled rectifier having this additional property.
- a spark ignition system of the kind specified and according to the invention comprises in combination first and second terminals for connection to a DC. source, a switchable rectifier having its anode and cathode connected across said terminals in series with said winding, a series circuit connected across said terminals, said series circuit including a contact breaker and an inductor, means coupling said series circuit to the gate of the switchable rectifier, so that the switchable rectifier is switched on when the contact breaker closes, and is switched off by the energy stored in the inductor when the contact breaker opens, a first capacitor connected across the contact breaker, and an additional capacitor connected in the system, said additional capacitor being connected in a position such that in the event of the contact breaker reaking down after it opens, the charge on this additional capacitor will prevent inadvertent switching on of the switchable rectifier.
- FIGURE 1 is a circuit diagram showing an arrangement having certain disadvantages
- FIGURE 2 shows one example of a circuit for minimising such disadvantages
- FIGURES 3 and 4 illustrate further examples.
- first and second terminals 11, 12 which in use are connected to a DC. source 13 so as to be of positive and negative polarity respectively.
- an ignition transformer 14 having its secondary winding 15 connected through a distributor 16 to the spark plugs 17 of the engine in turn.
- the primary winding 18 of the transformer 14 has one end connected through a resistor 19 to the terminal 11, and its other end connected to the terminal 12 through the anode and cathode of a switchable rectifier 21, the anode and cathode being bridged by a capacitor 22.
- a series circuit including a contact breaker 23, a resistor 24 and an inductor 25.
- the contact breaker 23 is bridged by a capacitor 26, whilst a point 27 intermediate the resistor 24 and inductor 25 is connected to the gate of the switchable rectifier 21.
- the circuit thus far described operates in the following manner: when the contact breaker 23 closes, current flows from terminal 11 through the contact breaker 23 and resistor 24 to the point 27 between the resistor 24 and inductor 25. From the point 27, part of the current flows 7 to the terminal 12 through the gate and cathode of the rectifier 21, so switching the rectifier 21 on. The remainder of the current flows to the terminal 12 through the inductor 25, in which energy is stored.
- capacitor 26 is charged so that its lower plate is negative.
- ther capacitor 26 might be of capacitance 0.2 microfarad
- it is replaced as shown in FIGURE 2 by a capacitor 26a connected across the contact breaker 23 and of capacitance 0.05 microfarad, and a further capacitor 26b connected in parallel with the inductor 25, the capacitance of the capacitor 2612 being 0.15 microfarad.
- the arrangement is such that when the inductor 25 drives point 27 negative, both capacitors are charged to almost equal potentials behaving thus efiectively as a single capacitor.
- the capacitor 26a will discharge in a oscillatory manner in the same way as the capacitor 26 in FIGURE 1, but the capacitor 26b will discharge exponentially through the resistor 24.
- the constants of the circuit are so chosen that the point 27 cannot become sutficiently positive to switch on the rectifier 21 until the contact breaker 23 closes again.
- a diode 28 is included between the inductor 25 and the point 27, and the capacitor 26b is bridged by a resistor 29.
- the diode 28 prevents re-switching on of the switchable rectifier 21 as a result of oscillations occurring between the inductor 25 and the capacitors 26a, 26b, and the resistor 29 ensures that these capacitors are completely discharged at the end of each cycle before the contact breaker 23 closes.
- FIGURE 4 illustrates two alternative positions for the capacitor 26b. In the full line position, the capacitor 26b is connected across the capacitor 26a is series with a resistor 33. In the dotted line position, the capacitor 26b is connected between the terminal 11 and point 27.
- a resistor maybe included in series with the capacitor 26b in FIGURE 2, or the capacitor 26b shown in dotted lines in FIGURE 4.
- the point 27 has been connected to the gate of the switchable rectifier 21 either directly or through a resistor.
- the coupling to the gate of the switchable rectifier can be inductive, and for this purpose the inductor may constitute the primary winding of a transformer, the secondary winding of which has one end connected to the terminal 12 and its other end connected to the gate of the rectifier 21.
- a spark ignition system for an internal combustion engine of the kind in which current flow in a winding controls discharge across a spark plug of the engine, comprising in combination a DC. source having a positive terminal and a negative terminal, a switchable rectifier having its anode and cathode connected across said terminals in series with said winding, said switchable rectifier having an anode, a cathode and a gate, and being turned on by a positive pulse between its gate and cathode, and turned off by a negative pulse between its gate and cathode, a series circuit connected across said terminals, said series circuit including a contact breaker having one side thereof connected to said positive terminal and an inductor through which the other side of said contact breaker is connected to said negative terminal, means coupling a point in said series circuit intermediate the contact breaker and inductor to the gate of the switchable rectifier, so that the switchable rectifier point intermediate the inductor and contact breaker and the negative terminal.
- a spark ignition system as claimed in claim 1 in which the additional capacitor is connected between a point intermediate the inductor and contact breaker and the positive terminal.
- a spark ignition system as claimed in claim 1 including a resistor in series with the additional capacitor.
- a spark ignition system as claimed in claim 1 in which the additional capacitor is connected across the first capacitor in series with a resistor.
- a spark ignition system as claimed in claim 1 in which the series circuit includes a resistor and a diode in series between the contact breaker and the inductor,
- the diode preventing the inductor and additional capacitor from forming an oscillatory circuit.
- a spark ignition system as claimed inclaim 6 including a resistor connected between the negative terminal and a point intermediate the diode and resistor in the series circuit.
- a spark ignition system as claimed in claim 6 in which said means coupling the series circuit to the gate comprises a connection from the gate to a point intermediate the diode and resistor in the series circuit.
- a spark ignition system as claimed in claim 8 in which said connection includes a resistor which delays switching on of the switchable rectifier.
- a spark ignition system as claimed in claim 9 including a diode connected across said resistor so that switching 011 of the switchable rectifier is not delayed.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB45984/62A GB1064731A (en) | 1962-12-05 | 1962-12-05 | Spark ignition systems for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
US3319617A true US3319617A (en) | 1967-05-16 |
Family
ID=10439359
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US325661A Expired - Lifetime US3319617A (en) | 1962-12-05 | 1963-11-22 | Spark ignition systems for internal combustion engines |
Country Status (4)
Country | Link |
---|---|
US (1) | US3319617A (nl) |
DE (1) | DE1464009B1 (nl) |
GB (1) | GB1064731A (nl) |
NL (1) | NL143655B (nl) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408993A (en) * | 1965-04-09 | 1968-11-05 | Mallory Electric Corp | Electrical switching circuit |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2011395A (en) * | 1933-08-12 | 1935-08-13 | Gen Electric | Electric circuit |
US2433650A (en) * | 1947-12-30 | Ignition system | ||
US3025430A (en) * | 1959-04-08 | 1962-03-13 | Axel R Leppala | Ignition circuit |
US3131327A (en) * | 1964-04-28 | Type ignition circuit condenser discharge | ||
US3213320A (en) * | 1962-04-05 | 1965-10-19 | Gen Motors Corp | Ignition system having a controlled rectifier |
US3219877A (en) * | 1962-04-05 | 1965-11-23 | Gen Motors Corp | Controlled rectifier ignition system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1170981A (fr) * | 1957-04-08 | 1959-01-21 | Ducellier Ets | Système d'allumage électronique pour moteurs à explosion |
FR72497E (fr) * | 1957-11-22 | 1960-04-14 | Dispositif d'allumage électronique pour moteurs à explosion | |
US3034019A (en) * | 1958-08-11 | 1962-05-08 | Gen Motors Corp | Electronic ignition circuit |
FR75571E (fr) * | 1959-04-15 | 1961-07-17 | Dba Sa | Système d'allumage électronique pour moteurs à explosion |
FR1237802A (fr) * | 1959-06-22 | 1960-08-05 | Csf | Perfectionnements à l'allumage électronique |
DE1103389B (de) * | 1959-10-14 | 1961-03-30 | Siemens Ag | Schaltanordnung mit einer Vierschichthalbleiteranordnung |
-
1962
- 1962-12-05 GB GB45984/62A patent/GB1064731A/en not_active Expired
-
1963
- 1963-11-22 US US325661A patent/US3319617A/en not_active Expired - Lifetime
- 1963-11-27 DE DE19631464009 patent/DE1464009B1/de not_active Withdrawn
- 1963-12-04 NL NL63301356A patent/NL143655B/nl unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2433650A (en) * | 1947-12-30 | Ignition system | ||
US3131327A (en) * | 1964-04-28 | Type ignition circuit condenser discharge | ||
US2011395A (en) * | 1933-08-12 | 1935-08-13 | Gen Electric | Electric circuit |
US3025430A (en) * | 1959-04-08 | 1962-03-13 | Axel R Leppala | Ignition circuit |
US3213320A (en) * | 1962-04-05 | 1965-10-19 | Gen Motors Corp | Ignition system having a controlled rectifier |
US3219877A (en) * | 1962-04-05 | 1965-11-23 | Gen Motors Corp | Controlled rectifier ignition system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3408993A (en) * | 1965-04-09 | 1968-11-05 | Mallory Electric Corp | Electrical switching circuit |
Also Published As
Publication number | Publication date |
---|---|
NL143655B (nl) | 1974-10-15 |
GB1064731A (en) | 1967-04-05 |
DE1464009B1 (de) | 1970-08-06 |
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