US3652869A - Electrical control systems - Google Patents

Electrical control systems Download PDF

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Publication number
US3652869A
US3652869A US3652869DA US3652869A US 3652869 A US3652869 A US 3652869A US 3652869D A US3652869D A US 3652869DA US 3652869 A US3652869 A US 3652869A
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US
United States
Prior art keywords
electromagnet
resistor
energized
preset
operative
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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English (en)
Inventor
William David Holt
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
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Publication of US3652869A publication Critical patent/US3652869A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/73—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for DC voltages or currents

Definitions

  • An electrical control system particularly for a choke cable on a vehicle, includes a pair of electromagnets, each of which when energized moves the choke cable back from its opera- [30] Foreign Application Priority Data tive position to its inoperative position.
  • the first electromag- Jan. 17, 1970 Great Britain ..2,369/70 net is energized when the engine temperature rises to a predetermined value, moves the choke cable back, and brings [52] US.
  • a system comprises in combination a pair of supply lines, a resistor connected across the supply lines, the resistor having a value which varies with said parameter, a first electromagnet having one end connected to one of said supply lines and its other end connected to the movable contact of a multiposition switch having a plurality of operative fixed contacts, a plurality of preset resistors connecting said operative contacts to the other supply line, a second electromagnet having one end connected to one of the supply lines and its other end connected to the movable contact of a second multiposition switch having a plurality of operative fixed contacts, a plurality of preset resistors connecting .the operative fixed contacts of the second switch to the other supply line, the arrangement of the electromagnets and switches being such that at any given time the resistor having a value dependent on the parameter is connected between the lines in parallel with a series combination including one of the preset resistors and one of the electromagnets, current flow through a preset resistor to an electromagnet being insufficient to
  • the accompanying drawing is a circuit diagram illustrating one example of the invention.
  • the battery of a road vehicle has its negative terminal connected to an earth supply line 12, and its positive terminal connected through a switch 13 which is closed only when the voltage regulator of the vehicle is operating, and resistors 11, 14 in series with the switch 13, to a supply line 15, the voltage between the lines 15 and 12 being stabilized by a Zener diode 16, connected between the junction of the resistors 11, 14 and the line 12.
  • the arrangement further includes a first rotary or other multiposition switch having a movable contact 17 which is movable in use sequentially over fixed contacts 22, 21, 20, l9, 18 in that order.
  • the contacts 18, 20, 22 are operative fixed contacts, the contacts 18 and being connected respectively to one.
  • eachof two preset resistors 23, 24 the other ends of these resistors being connected through a diode 51 to the line 15.
  • the contact 22 is connected to a supply line 25 connected to the positive battery terminal through the switch 13 and the contacts 19 and 21 are nonoperative fixed contacts.
  • the movable contact 17 is connected to the line 12 through an electromagnet 28.
  • a second rotary or other multiposition switch is also pro: vided having a movable contact 29 which is movable in use sequentially over fixed contacts 34, 33, 32, 31, 30 in that order.
  • the contacts 30, 32 and 34 are nonoperative, but the contacts 31 and 33 are operative and are connected through resistors 35 and 36 respectively to the cathode of the diode 51.
  • the movable contact 29 is connected to the line 12 through a second electromagnet 37.
  • the line 15 is connected through a resistor 26 to the base of an NPN-transistor 38, having its base connected through a variable resistor 39 and a thermistor S2 in parallel to the line 12, its emitter connected to the line 12 and its collector connected through a resistor 41 to the line 25.
  • the collector of the transistors 38 is further connected through a diode 42 to the gate of a thyristor 43, the anode of which is connected to the line 25, the gate of which is connected through a resistor 53 to the line 12, and the cathode of which is connected through diodes 44, 45, 46 and 47 respectively to the contacts 18, 20, 31 and 33.
  • a resistor 27 having a value determined by some variable parameter is'connected across the lines 15, 12.
  • the specific example described is for use in a vehicle having an automatic choke control.
  • the choke is moved to its operative position manually, but is returned to its nonoperative position with increasing engine temperature by the electromagnets 28 and 37, which require to be energized in turn.
  • the electromagnets 28 and 37 are to be energized alternately, and that the resistor 27 is sensitive to engine temperature, and has a sharply decreasing resistance with increasing temperature.
  • a resistor is used having a resistance of 2,300 ohms at minus 5 C falling to ohms at 55 C.
  • the contacts 29 and 17 are moved into engagement with the contacts 34 and 22 respectively.
  • the voltage regulator operates and closes the contact 13.
  • the electromagnet 28 is now energized by way of the contacts 22, 17,
  • the electromagnet 28 serving to move thev choke cable back towards its inoperative position, but in addition moving the contact 17 onto the contact 21 and the contact 29 onto the contact 33.
  • the circuit to the electromagnet 28 is now broken, and the electromagnet 37 is not energized, because the current flowing in the electromagnet 37 by way of the resistors 11, 14, the diode 51 and the resistor 36 is insufficient to energize the electromagnet 37.
  • the temperature sensed by the resistor 27 rises to a predetermined value, then the value of the resistor 27 will fall to a level at which the transistor 38 turns off, and current flows by way of the resistor 41 and diode 42 to turn on the thyristor 43.
  • the thyristor 43 is turned on again and the electromagnet 28 is energized by way of the diode 45.
  • the contacts 17 and 29 now step onto the contacts 19 and 35 respectively, and the sequence continues with the electromagnet 37 being energized by way of the diode 46 when the engine temperature has risen further, whereupon the contacts 17 and 29 step to the position shown.
  • the electromagnet 28 is energized by way of the diode 44, at which point the choke cable is in its inoperative position and the contacts 17 and 29 are stepped to their final off position.
  • the thermistor S2 caters for changes in ambient temperature, and it will be appreciated that the overall effect of the circuit is to return the choke gradually to its inoperative position as the temperature of the engine increases.
  • circuit can be used to control other arrangements in response to variation of a parameter.
  • An electrical control system for operating a pair of electromagnets alternately in response to variations of a parameter comprising in combination a pair of supply lines, a resistor connected across the supply lines, the resistor having a value which varies with said parameter, a first electromagnet having one end connected to one of said supply lines and its other end connected to the movable contact of a multiposition switch having a plurality of operative fixed contacts, a plurality of preset resistors connecting said operative contacts to the other supply line, a second electromagnet having one end connected to one of the supply lines and its other end connected to the movable contact of a second multiposition switch having a plurality of operative fixed contacts, a plurality of preset resistors connecting the operative fixed contacts of the second switch to the other supply line, the arrangement of the electromagnets and switches being such that at any given time the resistor having a value dependent on the parameter is connected between the lines in parallel with a series combination including one of the preset resistors and one of the electromagnets,

Landscapes

  • Means For Warming Up And Starting Carburetors (AREA)
  • Magnetically Actuated Valves (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
US3652869D 1970-01-17 1971-01-06 Electrical control systems Expired - Lifetime US3652869A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB236970 1970-01-17

Publications (1)

Publication Number Publication Date
US3652869A true US3652869A (en) 1972-03-28

Family

ID=9738339

Family Applications (1)

Application Number Title Priority Date Filing Date
US3652869D Expired - Lifetime US3652869A (en) 1970-01-17 1971-01-06 Electrical control systems

Country Status (7)

Country Link
US (1) US3652869A (cs)
JP (1) JPS538852B1 (cs)
CS (1) CS160671B2 (cs)
ES (1) ES387681A1 (cs)
FR (1) FR2077191B1 (cs)
GB (1) GB1334532A (cs)
SE (1) SE355044B (cs)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9464588B2 (en) 2013-08-15 2016-10-11 Kohler Co. Systems and methods for electronically controlling fuel-to-air ratio for an internal combustion engine
US10054081B2 (en) 2014-10-17 2018-08-21 Kohler Co. Automatic starting system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463695A1 (fr) * 1979-08-24 1981-02-27 Smiths Industries Ltd Circuit avertisseur du fonctionnement superflu du starter d'un vehicule a moteur

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533381A (en) * 1968-05-24 1970-10-13 Bosch Gmbh Robert Temperature sensitive control circuit for internal combustion engines having a fuel injection system
US3586869A (en) * 1969-09-08 1971-06-22 Honeywell Inc Sequencing control unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533381A (en) * 1968-05-24 1970-10-13 Bosch Gmbh Robert Temperature sensitive control circuit for internal combustion engines having a fuel injection system
US3586869A (en) * 1969-09-08 1971-06-22 Honeywell Inc Sequencing control unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9464588B2 (en) 2013-08-15 2016-10-11 Kohler Co. Systems and methods for electronically controlling fuel-to-air ratio for an internal combustion engine
US10240543B2 (en) 2013-08-15 2019-03-26 Kohler Co. Integrated ignition and electronic auto-choke module for an internal combustion engine
US10794313B2 (en) 2013-08-15 2020-10-06 Kohler Co. Integrated ignition and electronic auto-choke module for an internal combustion engine
US10054081B2 (en) 2014-10-17 2018-08-21 Kohler Co. Automatic starting system

Also Published As

Publication number Publication date
JPS538852B1 (cs) 1978-04-01
FR2077191A1 (cs) 1971-10-22
FR2077191B1 (cs) 1973-10-19
CS160671B2 (cs) 1975-03-28
ES387681A1 (es) 1974-01-16
SE355044B (cs) 1973-04-02
GB1334532A (en) 1973-10-17

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