US3640260A - Ignition arrangement for internal combustion engines - Google Patents

Ignition arrangement for internal combustion engines Download PDF

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Publication number
US3640260A
US3640260A US51181A US3640260DA US3640260A US 3640260 A US3640260 A US 3640260A US 51181 A US51181 A US 51181A US 3640260D A US3640260D A US 3640260DA US 3640260 A US3640260 A US 3640260A
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US
United States
Prior art keywords
transistors
circuit
housing
distributor
ignition
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
Application number
US51181A
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English (en)
Inventor
Hermann Mittag
Jorg Issler
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Priority claimed from DE19691935517 external-priority patent/DE1935517C3/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3640260A publication Critical patent/US3640260A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors
    • F02P7/026—Distributors combined with other ignition devices, e.g. coils, fuel-injectors
    • 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

Definitions

  • the ignition arrangement which, as an integrated circuit, is July 12, 1969 Gennany ..P 19 35 517.0 fix d to the distributor housing, comprises a battery-powered circuit having two transistors Darlington connected, of which [52] US. Cl .123] 148 E, 315/209 the common load is the primary winding of a spark coil or of [51] Int. Cl ..F02p 3/06 an ignition capacitor charging transformer.
  • a cam on the dis- [58] tributor shaft periodically opens a make-and-break switch in Field of Search ..123/146.5 A, 148 E; 315/209 the circuit.
  • the invention relates to an ignition arrangement for internal combustion engines.
  • a direct current circuit containing an inductive reactance is periodically opened by means of a transistor switching circuit.
  • An arrangement of this kind is greatly heated not only bythe operation of the internal com bustion engine but also by the heat loss in the control resistors of the circuit. Consequently, the highly temperature sensitive transistor circuit does not always ensure the desired switching reliability, and, moreover, poses difficulties as to where it should be placed.
  • An object of the invention is appreciably to reduce the heat acting on the transistor switching circuit, particularly the heat caused by the control current.
  • the invention broadly comprises a circuit having a source of direct current, such as the battery of an internal combustion engine, and at least two transistors connected together to have a current gain that is the product of their individual current gains, means for generating high-voltage pulses for firing spark plugs, the means including an inductive reactance connected in the emitter-collector path of one of the transistors as the load common to the transistors, and means for periodically opening the circuit in synchronism with the operation of the engine.
  • a source of direct current such as the battery of an internal combustion engine
  • the means for generating high-voltage pulses for firing spark plugs the means including an inductive reactance connected in the emitter-collector path of one of the transistors as the load common to the transistors, and means for periodically opening the circuit in synchronism with the operation of the engine.
  • FIG. 1 shows a circuit of one embodiment of the invention, as applied to a spark coil ignition
  • FIG. 2 is a view in section of adistributor housing with the ignition circuit and connector arrangement
  • FIG. 3 is a detail view of another embodiment of the combination of distributor housing, shown in section, the ignition circuit, and the connector arrangement;
  • FIG. 4 shows a circuit of another embodiment, as applied to an ignition system having a capacitor.
  • the circuit shown in FIG. 1 has a direct current source 11, such as the battery of the internal combustion engine, not shown.
  • the ignition circuit uses the principle of an ignition, or spark, coil.
  • the source 11 is connected to a direct current circuit containing an inductive reactance 13.
  • the inductive reactance consists of the primary winding 14 of a spark coil 15.
  • the secondary winding 16 of this coil is connected in turn to each of the spark plugs 20, 21, 22 and 23 of the engine's cylinders by the rotating arm 19 rigidly fixed to the turning shaft 17 of the ignition distributor 18 of the engine.
  • a transistor switch 24 ensures that the direct current circuit of the winding 14 is broken in synchronism with the ignition strokes of the pistons.
  • the switch 24 comprises two transistors T1 and T2 connected together to have a common load and a current gain that is the product of their individual current gains.
  • the specific connection shown is the Darlington; and the load, comprised by the primary winding 14, is connected in the emitter-collector path El-Cl of the transistor T1.
  • the emitter E1 of this transistor is therefore connected through a connector 25, a lead' 25' forming part of the connector 25, the
  • the collector C1 of this same transistor is connected to the negative pole of the source of the ground wire 27,
  • the base B1 is connected to the emitter E2 of transistor T2, of which latter the collector C2 is connected to the collector C1.
  • the base B2 is connected by a control resistance 28 and a lead 29 to a control arrangement 30 connected to the ground wire 27.
  • the control arrangement preferably a make-and-break switch 31, which is operated by a cam 32 on the distributor shaft 17.
  • the make-and-break switch 31 is closed, the two emittercollector paths E2-C2 and El-Cl are conductive, so that current from the source 11 flows through the primary 14 of the spark coil 15.
  • the cam 32 opens the switch 31, causing the potential at the base B2 to fall and thereby the two emitter-collector paths E2-C2 and El-Cl to become nonconductive. Consequently, there appears across the secondary winding 16 of the spark coil 15 a high-voltage pulse, which the rotating distributor arm 19 conducts to one of the four spark plugs 20 to 24. In Fig. l the pulse is conducted to the spark plug 23, where the resulting spark ignites the compressed fuel-air mixture.
  • the control resistance 28 can have a relatively large value, which ensures that very little of the control current is converted into heat. There is no difficulty, consequently, to incorporate the two transistors T1 and T2 as an integrated circuit in a tiny electronic unit, which is made part of the ignition distributor 18.
  • FIG. 2 A suitable constructional arrangement for the unit 33 is shown in FIG. 2.
  • the electronic unit 33 and the connector 25 comprises a unitary part, which is mounted on the distributor housing 34 and has a portion 35 that extends outside of the distributor housing.
  • the portion 35 is a terminal to which the primary winding lead 25 is connected.
  • the connector 25 is constructed as a screw, which has a head 37 containing the unit 33 and engaging the inner wall surface 36 of the housing 34 and which also has a threaded shank 38, which is the terminal 35.
  • Two nuts 39 and 40 are screwed onto the shank 38.
  • the nut 39 holds the unit 33 fast against the housing 34, and the nut 40 clamps in place the lead 25.
  • the lead 29 is mechanically held on the screwhead 37 and connected to the unit 33 in accordance with the wiring diagram of FIG. 1.
  • the connector 125 is constructed as a heat-dissipating body and fixed to the outside of the distributor housing 34.
  • the connector 125 has for the lead 29 a terminal 41, which extends into the interior of the housing 34. Both terminals 35 and 41 are preferably flat plugs.
  • the ignition arrangement is to incorporate a circuit for suppressing interference pulses caused by chattering of the contacts of the switch 31, it can be made as an electronic unit and built into, or as part of, the connector 25 or 125, as is the unit 33.
  • the invention can also be employed, as shown in FIG. 4, in
  • the inductive reactance 13 is formed by the primary winding 42 of a charging transformer 43, of which latter the secondary winding 44 is connected through a diode 45 to the ignition capacitor 46.
  • the capacitor is shunted by a series circuit consisting of the primary 47 of the spark coil 48 and the switching path A-K of a thyristor 49.
  • the spark coil secondary 50 is connected to the spark plugs 20 to 23 in the same way as is the secondary 16 in the circuit of FIG. 1.
  • the thyristor has a gate S, which triggers the thyristor to conduct along the path A-K when it receives a positive pulse 51.
  • the resulting high-voltage pulse across the secondary 44 whenever the make-and-break switch 31 is opened charges the capacitor 46 through the diode 45.
  • the thyristor gate S receives a positive pulse 51, which renders the switching path A-K conductive and so enables the capacitor 46 to discharge through the primary winding 47 of the spark coil 48.
  • the high-voltage pulse appearing across the secondary 50 is conducted to one of the spark plugs 20 to 23, as in the embodiment shown in FIG. 1.
  • a capacitor comprising a circuit having a source of direct current; said circuit including at least two transistors connected together to have a current gain that is the product of their individual current gains, the base of one of said transistors being connected to the emitter of the other of said two transistors and the collectors of said two transistors being connected directly together, so that said two transistors are Darlington connected; means for generating high-voltage pulses for firing spark plugs, said means including an inductive reactance connected in the emitter-collector path of said one of said transistors as the load common to said two or more said transistors; and means for periodically opening said circuit and thereby charging said capacitor in synchronism with the operation of the engine.
  • a combination as defined in claim 2 including an ignition distributor, and an electronic unit as a part of said distributor and having an integrated circuit comprising said transistors.
  • said distributor comprises a housing to which said unit is fixed, and said unit includes connector means accessible from outside and housing for connection to said inductive reactance.
  • a combination comprising a circuit having a source of direct current; said circuit including at least two transistors connected together to have a current gain that is the product of their individual current gains; means for generating highvoltage pulses for firing spark plugs, said means including an inductive reactance connected in the emitter-collector path of said one of said transistors as the load common to said two or more said transistors; means for periodically opening said circuit in synchronism with the operation of the engine, said means for periodically opening said circuit disconnecting the base of the other of said transistors in said circuit, said transistors being Darlington connected; an ignition distributor and an electronic unit as a part of said distributor and having an integrated circuit comprising said transistors, said distributor comprising a housing to which said unit is fixed, and said unit including connector means accessible from outside said housing for connection to said inductive reactants, said unit being located inside said distributor housing, and said connector means being a screw means having a head containing said unit and engaging an inside surface of said housing.
  • a combination comprising a circuit having a source of direct current; said circuit including at least two transistors connected together to have a current gain that is the product of their individual current gains; means for generating highvoltage pulses for firing spark plugs, said means including an inductive reactance connected in the emitter-collector path of said one of said transistors as the load common to said two or more said transistors; means for periodically opening said circuit in synchronism with the operation of the engine, said transistors being Darlington connected, said means for periodically opening said circuit disconnecting the base of the other of said transistors in said circuit; an ignition distributor and an electronic unit as part of said distributor and having an integrated circuit comprising said transistors, said distributor comprising a housing to which said unit is fixed, and said unit including connector means accessible from outside said housing for connection to said inductive reactants, said connector means being a heat dissipating body in which said electronic unit is held.
  • connector means is fixed to the outside of said distributor housing, and includes first terminal means projecting through and inside said housing for connection to said means for periodically opening said circuit and second terminal means outside of said housing for connection to said inductive reactance.
  • said inductive reactance is the primary winding of a transformer, said transformer having a secondary winding, and an ignition capacitor connected to be charged by said secondary winding.

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  • 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)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
US51181A 1969-07-12 1970-06-30 Ignition arrangement for internal combustion engines Expired - Lifetime US3640260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691935517 DE1935517C3 (de) 1969-07-12 Zündeinrichtung für Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3640260A true US3640260A (en) 1972-02-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
US51181A Expired - Lifetime US3640260A (en) 1969-07-12 1970-06-30 Ignition arrangement for internal combustion engines

Country Status (6)

Country Link
US (1) US3640260A (es)
JP (1) JPS5018535B1 (es)
ES (1) ES381696A1 (es)
FR (1) FR2031007A5 (es)
GB (1) GB1282824A (es)
SE (1) SE390327B (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765391A (en) * 1971-02-22 1973-10-16 W Cook Transistorized ignition system
US3881458A (en) * 1972-09-13 1975-05-06 Bosch Gmbh Robert Ignition system dependent upon engine speed
USRE29862E (en) * 1972-09-13 1978-12-19 Robert Bosch Gmbh Ignition system dependent upon engine speed
US4173961A (en) * 1977-02-22 1979-11-13 Delta Systems, Inc. Inductive solid state magneto ignition system
US4287436A (en) * 1978-06-07 1981-09-01 Tokyo Shibaura Denki Kabushiki Kaisha Electrical circuit for driving an inductive load
FR2571440A1 (fr) * 1984-10-04 1986-04-11 Magneti Marelli Spa Structure de module electronique et son montage sur le distributeur de moteurs a combustion interne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3039228A1 (de) * 1980-10-17 1982-05-27 Robert Bosch Gmbh, 7000 Stuttgart Zuendverteiler fuer brennkraftmaschinen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262438A (en) * 1962-11-23 1966-07-26 Philips Corp Ignition system for internal combustion engines
US3340861A (en) * 1964-09-16 1967-09-12 Rca Corp Transistorized ignition circuit
US3374778A (en) * 1965-10-22 1968-03-26 John A. Dixon Electronic ignition system
US3438362A (en) * 1968-01-08 1969-04-15 Willis D Clyborne Ignition system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1152489A (fr) * 1956-06-25 1958-02-18 Générateur électronique d'impulsions à haute tension pour l'allumage de moteurs à explosion
US3437876A (en) * 1962-07-12 1969-04-08 Gianni A Dotto Automotive semiconductor ignition control apparatus
US3299874A (en) * 1964-05-15 1967-01-24 Richard Guarino Transistor ignition
US3328614A (en) * 1964-08-24 1967-06-27 Gen Motors Corp Breakerless ignition control unit
US3435265A (en) * 1967-01-03 1969-03-25 Brunswick Corp Housing and mounting for ignition trigger circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262438A (en) * 1962-11-23 1966-07-26 Philips Corp Ignition system for internal combustion engines
US3340861A (en) * 1964-09-16 1967-09-12 Rca Corp Transistorized ignition circuit
US3374778A (en) * 1965-10-22 1968-03-26 John A. Dixon Electronic ignition system
US3438362A (en) * 1968-01-08 1969-04-15 Willis D Clyborne Ignition system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765391A (en) * 1971-02-22 1973-10-16 W Cook Transistorized ignition system
US3881458A (en) * 1972-09-13 1975-05-06 Bosch Gmbh Robert Ignition system dependent upon engine speed
USRE29862E (en) * 1972-09-13 1978-12-19 Robert Bosch Gmbh Ignition system dependent upon engine speed
US4173961A (en) * 1977-02-22 1979-11-13 Delta Systems, Inc. Inductive solid state magneto ignition system
US4287436A (en) * 1978-06-07 1981-09-01 Tokyo Shibaura Denki Kabushiki Kaisha Electrical circuit for driving an inductive load
FR2571440A1 (fr) * 1984-10-04 1986-04-11 Magneti Marelli Spa Structure de module electronique et son montage sur le distributeur de moteurs a combustion interne

Also Published As

Publication number Publication date
GB1282824A (en) 1972-07-26
SE390327B (sv) 1976-12-13
DE1935517B2 (de) 1976-01-15
DE1935517A1 (de) 1971-01-21
JPS5018535B1 (es) 1975-06-30
FR2031007A5 (es) 1970-11-13
ES381696A1 (es) 1972-12-01

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