US3629597A - Engine-starting systems - Google Patents

Engine-starting systems Download PDF

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Publication number
US3629597A
US3629597A US28314A US3629597DA US3629597A US 3629597 A US3629597 A US 3629597A US 28314 A US28314 A US 28314A US 3629597D A US3629597D A US 3629597DA US 3629597 A US3629597 A US 3629597A
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United States
Prior art keywords
transistor
circuit
engine
engine speed
starter
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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
US28314A
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English (en)
Inventor
David Wiley
Maurice James Allport
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Individual
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Individual
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Publication date
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Publication of US3629597A publication Critical patent/US3629597A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/10—Safety devices
    • F02N11/101—Safety devices for preventing engine starter actuation or engagement
    • F02N11/105—Safety devices for preventing engine starter actuation or engagement when the engine is already running

Definitions

  • this means is a transistor in series with a relay con [51] B Cl 11/00 trolling the starter, and this transistor is turned off when the [50] Field of Search 290/36, 37, engine Spud is above a predetermined value
  • delay 38; 123/179 means is provided for keeping the starter circuit broken for a References Cited predetermined period of time after the engine speed falls UNITED STAT S PATENTS below the predetermmed value.
  • a system comprises a starter circuit for starting an engine, means for breaking the starter circuit when the engine speed is above a predetermined value, and delay means operable when the engine speed falls below said predetermined value for keeping the starter circuit broken for a predetermined period of time.
  • the invention is designed to minimize the possibility of damaging the starter by trying to start the engine when it is running.
  • the starter circuit is automatically cutout at a predetermined engine speed, so that a second attempt cannot be made to start an engine once it has already started.
  • the delay means is incorporated to prevent this possibility.
  • the vehicle with which the system is associated has a battery 5 with positive and negative terminals 11, 12 the battery being charged through a full-wave rectifier 7 by an alternator 6 driven by the engine.
  • the output from the alternator is also fed through three further diodes 8 to a terminal 9 which is connected to a voltage regulator (not shown) controlling the alternator output by varying the current flow in its field winding.
  • the terminals 9, 11 are interconnected through a warning lamp 30 in series with a switch 25 which will, on a diesel engine vehicle, be the auxiliary switch of the vehicle, but in a spark ignition system will be the ignition switch.
  • the alternator also has one phase point connected to a terminal 10 at which an AC output is obtained at a frequency dependent on the speed of rotation of the alternator, which in turn is dependent on engine speed.
  • the terminal 11 is connected through the switch 25, a starter switch 13 and a winding 14 in series to the collector of an NPN transistor 15 the emitter of which is connected to the terminal 12.
  • the winding 14 is bridged by a diode 16, and the junction of the winding 14 and switch 13 is connected through a normally open pair of contacts 17 and the starter solenoid 18 in series to the terminal 12.
  • the contacts 17 are closed by the winding 14 when the winding 14 is energized.
  • the collector and base of the transistor 15 are bridged by a diode 19, and the base of the transistor is connected through a Zener diode 21 to the collector of an NPN transistor 22 having its emitter connected through a resistor 23 to the line 12.
  • the collector of the transistor 22 is connected through a resistor 24 to junction of the lamp and switch 25, and the emitter of the transistor 22 is connected through a resistor 26 to the same junction.
  • the circuit further includes a resistor 27 and a diode 28 connected in series between the collector of the transistor 15 and the base of the transistor 22 to provide a feedback path.
  • the base of the transistor 22 is connected to the terminal 10 through a diode pump circuit which includes a capacitor 29 and a diode 31 in series between the terminal 10 and the base of the transistor 22, together with a diode 32 connecting the junction of the capacitor 29 and diode 31 to the terminal 12, and a capacitor 33 and a variable resistor 34 in parallel between the base of the transistor 22 and the terminal 12.
  • the terminal 10 is further connected to the terminal 12 through a diode 35 and a capacitor 36 in series, the junction of the diode 35 and capacitor 36 being connected through a variable resistor 37 and a diode 38 to the collector of the transistor 15.
  • the switch 25 When it is desired to start the engine, the switch 25 must developed across the Zener diode 21 to render it conductive,
  • the emitter voltage of the transistor 22 is set by the resistors 26 and 23 and as the base voltage rises a condition is reached, at a predetermined engine speed, at which the transistor 22 starts to conduct so that current flowing through the resistor 24 is diverted through the transistor 22.
  • the current flowing through the diode 38 and the transistor 15 is diverted through the base emitter of the transistor 22 to assist turn on of the transistor 22, this feedback increasing the switching speed of the circuit.
  • the Zener diode 21 enables the transistor 15 to be turned off even though the emitter of transistor 22 is at a higher voltage than that required to turn on the transistor 15.
  • the circuit switches rapidly to a condition in which the transistor 22 is on and the transistor 15 is off, so that the winding 14 is deenergized and the contacts 17 open to break the starter circuit.
  • the starter circuit remains broken as long as the engine speed is above the predetermined value. How ever, when the engine speed falls below the predetermined value, the voltage produced across the resistor 34 by the diode pump circuit will fall below the level at which the transistor 22 conducts, and so the circuit would be capable of reverting to its condition with the transistor 15 on and the transistor 22 off. The return to this condition is, however, delayed by the delay network.
  • This delay network includes the capacitor 36 which charges by way of the diode 35, and then discharges through the resistor 37 and diode 38, and thence through the resistor 27 and diode 28 to hold the transistor 22 on for a predetermined period of time which will be chosen so that the engine speed will fall to zero.
  • An engine-starting system for a road vehicle having a battery and an alternator driven by the engine for charging said battery comprising in combination a starter circuit for starting the engine, a diode pump circuit operated by said alternator for producing an output dependent on engine speed, a switching circuit operated by the output from said diode pump circuit for breaking the starter circuit when the engine speed is above a predetermined value, said switching circuit incorporating a first transistor which is turned on by the diode pump circuit at said predetermined engine speed, a second transistor in the starter circuit which is turned off when the first transistor conducts, a Zener diode through which the base of said second transistor is supplied with current, and a feedback circuit between the first and second transistors for increasing the base drive to the first transistor as the second transistor starts to turn off, said system further including delay means operable when the engine speed falls below said predetermined value for keeping the starter circuit broken for a predetermined period of time.
  • the delay means includes a capacitor which is charged by the alternator phase output and holds the first transistor on for said predetermined period of time after the output of the diode pump circuit has fallen to a value at which the first transistor could have turned off.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Ignition Timing (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Control Of Charge By Means Of Generators (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
US28314A 1969-05-12 1970-04-14 Engine-starting systems Expired - Lifetime US3629597A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB24054/69A GB1299593A (en) 1969-05-12 1969-05-12 Engine starting systems

Publications (1)

Publication Number Publication Date
US3629597A true US3629597A (en) 1971-12-21

Family

ID=10205640

Family Applications (1)

Application Number Title Priority Date Filing Date
US28314A Expired - Lifetime US3629597A (en) 1969-05-12 1970-04-14 Engine-starting systems

Country Status (5)

Country Link
US (1) US3629597A (enrdf_load_stackoverflow)
DE (1) DE2022422A1 (enrdf_load_stackoverflow)
ES (1) ES379660A1 (enrdf_load_stackoverflow)
FR (1) FR2047545A5 (enrdf_load_stackoverflow)
GB (1) GB1299593A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3764815A (en) * 1971-03-06 1973-10-09 Siemens Ag Start-up converter
DE2413565A1 (de) * 1973-03-22 1974-10-17 Lucas Electrical Co Ltd Fahrzeuganlassystem
US3857043A (en) * 1972-02-21 1974-12-24 Bosch Gmbh Robert Interlock circuit for blocking operation of starter motor of a combustion engine
US3863077A (en) * 1973-01-19 1975-01-28 Bendix Corp Starter lock-out circuit
US3893007A (en) * 1973-07-06 1975-07-01 Nippon Denso Co Vehicle starter protective system
FR2309732A1 (fr) * 1975-02-13 1976-11-26 Philips Nv Systeme de verrouillage de demarreur
US4032792A (en) * 1975-04-23 1977-06-28 U.S. Philips Corporation Automotive starter lockout system
US4490620A (en) * 1983-09-12 1984-12-25 Eaton Corporation Engine starter protective and control module and system
DE4338638A1 (de) * 1992-12-23 1994-06-30 Valeo Equip Electr Moteur Steuerkreis für einen Kraftfahrzeug-Anlasser
RU2431055C2 (ru) * 2008-09-30 2011-10-10 Открытое акционерное общество "АВТОВАЗ" Система пуска двигателя внутреннего сгорания
RU2520180C2 (ru) * 2012-09-13 2014-06-20 Курское открытое акционерное общество "Прибор" Система электропитания транспортного средства

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1442327A (en) * 1972-08-04 1976-07-14 Lucas Electrical Ltd Road vehicle electrical systems
RU2303706C2 (ru) * 2005-10-17 2007-07-27 Рязанский военный автомобильный институт им. ген. армии В.П. Дубынина Система электростартерного пуска двигателя
RU2306450C2 (ru) * 2005-11-03 2007-09-20 Рязанский военный автомобильный институт им. ген. армии В.П. Дубынина Система электростартерного пуска двигателя

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979302A (en) * 1931-11-30 1934-11-06 Eclipse Machine Co Backfire release
US2020750A (en) * 1932-03-30 1935-11-12 Eclipse Machine Co Automatic starting mechanism
US2035820A (en) * 1934-04-26 1936-03-31 Eclipse Machine Co Automatic starter control
US2165133A (en) * 1938-09-07 1939-07-04 Leonard J Cuthbertson Automatic starting device for internal combustion engines
US3167659A (en) * 1960-07-12 1965-01-26 Gen Motors Corp Automatic starting control
US3440433A (en) * 1966-05-19 1969-04-22 Bendix Corp Aircraft starter control
US3443112A (en) * 1965-12-09 1969-05-06 Gen Motors Corp Electric cranking motor automatic disconnect circuit
US3452210A (en) * 1966-05-23 1969-06-24 Avrum Gray Automatic starter for automobiles

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979302A (en) * 1931-11-30 1934-11-06 Eclipse Machine Co Backfire release
US2020750A (en) * 1932-03-30 1935-11-12 Eclipse Machine Co Automatic starting mechanism
US2035820A (en) * 1934-04-26 1936-03-31 Eclipse Machine Co Automatic starter control
US2165133A (en) * 1938-09-07 1939-07-04 Leonard J Cuthbertson Automatic starting device for internal combustion engines
US3167659A (en) * 1960-07-12 1965-01-26 Gen Motors Corp Automatic starting control
US3443112A (en) * 1965-12-09 1969-05-06 Gen Motors Corp Electric cranking motor automatic disconnect circuit
US3440433A (en) * 1966-05-19 1969-04-22 Bendix Corp Aircraft starter control
US3452210A (en) * 1966-05-23 1969-06-24 Avrum Gray Automatic starter for automobiles

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3764815A (en) * 1971-03-06 1973-10-09 Siemens Ag Start-up converter
US3857043A (en) * 1972-02-21 1974-12-24 Bosch Gmbh Robert Interlock circuit for blocking operation of starter motor of a combustion engine
US3863077A (en) * 1973-01-19 1975-01-28 Bendix Corp Starter lock-out circuit
DE2413565A1 (de) * 1973-03-22 1974-10-17 Lucas Electrical Co Ltd Fahrzeuganlassystem
US3893007A (en) * 1973-07-06 1975-07-01 Nippon Denso Co Vehicle starter protective system
FR2309732A1 (fr) * 1975-02-13 1976-11-26 Philips Nv Systeme de verrouillage de demarreur
US4070585A (en) * 1975-02-13 1978-01-24 U.S. Philips Corporation Starter motor lockout system
US4032792A (en) * 1975-04-23 1977-06-28 U.S. Philips Corporation Automotive starter lockout system
US4490620A (en) * 1983-09-12 1984-12-25 Eaton Corporation Engine starter protective and control module and system
DE4338638A1 (de) * 1992-12-23 1994-06-30 Valeo Equip Electr Moteur Steuerkreis für einen Kraftfahrzeug-Anlasser
RU2431055C2 (ru) * 2008-09-30 2011-10-10 Открытое акционерное общество "АВТОВАЗ" Система пуска двигателя внутреннего сгорания
RU2520180C2 (ru) * 2012-09-13 2014-06-20 Курское открытое акционерное общество "Прибор" Система электропитания транспортного средства

Also Published As

Publication number Publication date
GB1299593A (en) 1972-12-13
FR2047545A5 (enrdf_load_stackoverflow) 1971-03-12
ES379660A1 (es) 1972-08-01
DE2022422A1 (de) 1970-11-19

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