US3806854A - Control for automotive choke - Google Patents

Control for automotive choke Download PDF

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Publication number
US3806854A
US3806854A US00312428A US31242872A US3806854A US 3806854 A US3806854 A US 3806854A US 00312428 A US00312428 A US 00312428A US 31242872 A US31242872 A US 31242872A US 3806854 A US3806854 A US 3806854A
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United States
Prior art keywords
heat
heater
coil
choke
temperature
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Expired - Lifetime
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US00312428A
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English (en)
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J Armstrong
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Texas Instruments Inc
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Texas Instruments Inc
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Application filed by Texas Instruments Inc filed Critical Texas Instruments Inc
Priority to US00312428A priority Critical patent/US3806854A/en
Priority to GB4394473A priority patent/GB1447275A/en
Priority to GB1590876A priority patent/GB1449807A/en
Priority to IT7353072A priority patent/IT994399B/it
Priority to DD174145A priority patent/DD111235A5/xx
Priority to YU02819/73A priority patent/YU36405B/xx
Priority to JP48125847A priority patent/JPS4986725A/ja
Priority to FR7340957A priority patent/FR2209047B1/fr
Priority to RO76830A priority patent/RO90997B/ro
Priority to PL1973167018A priority patent/PL89875B1/pl
Priority to SU731987942A priority patent/SU797605A3/ru
Priority to HU73TE751A priority patent/HU175425B/hu
Priority to SE7316375A priority patent/SE405393B/xx
Priority to CS738388A priority patent/CS209467B2/cs
Priority to DE2360454A priority patent/DE2360454A1/de
Application granted granted Critical
Publication of US3806854A publication Critical patent/US3806854A/en
Priority to SU762326946A priority patent/SU797606A4/ru
Priority to SE7614400A priority patent/SE7614400L/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M23/00—Apparatus for adding secondary air to fuel-air mixture
    • F02M23/04—Apparatus for adding secondary air to fuel-air mixture with automatic control
    • F02M23/10—Apparatus for adding secondary air to fuel-air mixture with automatic control dependent on temperature, e.g. engine temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • F02M1/08—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically
    • F02M1/10—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on engine temperature, e.g. having thermostat
    • F02M1/12—Carburettors with means for facilitating engine's starting or its idling below operational temperatures the means to facilitate starting or idling becoming operative or inoperative automatically dependent on engine temperature, e.g. having thermostat with means for electrically heating thermostat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • An improved automotive choke control reduces the il l l l I pollutant content of automotive exhaust gasses by regulating a choke to supply fuel-enriched air-fuel mixtures to an internal combustion engine or motor only while such enriched mixtures are necessary to facilitate motor starting and to supply leaner air-fuel mixtures to the motor as soon as the motor is able to utilize the leaner mixtures while the motor is being heated to its normal operating temperature.
  • a thermostat metal coil is arranged to move and to open a choke valve as the coil is heated.
  • Two self-regulated electrical resistance heaters are thermally coupled to the thermostat metal coil for heating the coil to open a choke at selected rates, one heater being arranged to be energized when motor operation is first started for assuring that opening of the choke is initiated promptly after motor starting particularly at lower ambient temperatures and for assuring that opening of the choke proceeds at least at aselected rate, and the other heater being arranged to be ener:
  • a thermostatic switch upon actuation of a thermostatic switch at ambient temperatures above a selected level for opening the choke at a relatively faster rate and for assuring that full opening of the choke is completed'promptly after the motor has reached its normal operating temperature particularly at higher ambient temperatures.
  • a novel and advantageous heater element havingtwo portions arranged to serve as separate heaters in the control device.
  • the conventional control provides a rich air-fuel mixture to a motor when the motor is first started to facilitate motor starting, but supplies a leaner air-fuel mixture for achieving greater fuel economy after the motor has reached its normal operating temperature.
  • reliance upon heat-transfer from the motor for heating the thermostat metal coil of the choke control is unreliable and causes difficulty under various different conditions. For example, the system is unreliable at higher altitudes.
  • the conventional control tends to leave, the choke valve in its initial, almost fully closed position for too long a period of time after the motor is first started so that the air-fuel mixture supplied to the motor is unnecessarily rich during at least part of this period.
  • the conventional control tends to require too long a period of time to complete opening of the choke valve, particularly at higher ambient temperature, so that a partly enriched air-fuel mixture is supplied to the motor longer than is necessary.
  • This provision of unnecessarily rich air-fuel mixtures to the motor at various stages during warming up of the motor results in excessive emission of pollutants with the exhaust gasses from the motor during motor starting.
  • FIG. 1 is a plan elevation view of the improved control device provided by this invention
  • FIG. 2 is a section view to enlarged scale along line 22 of FIG. 1;
  • FIG. 3 is a section view to enlarged scale along line 3-3 of FIG. 1;
  • FIG. 4 is a schematic diagram illustrating operation of the control device of FIG. 1;
  • FIG. 5 is a section view similar to FIG. 2 illustrating an alternate embodiment'of the control of this inven-
  • FIG. 8 is a schematic diagram similar to FIG. 4 illustrating operation of the control device of FIG. 7.
  • the control 10 includes a housing 12 having a generally cylindrical body portion 14 forming a chamber 16, having a generally. cylindrical flange 18 forming a recess 20, and having an additional flange 22 forming another recess 24, this other recess having a reduced diameter portion forming a shoulder 26 within the recess.
  • the housing 12 is preferably formed of a strong, rigid dielectric material such as glass-filled nylon or the like.
  • the choke control 10 incorporates a heat sink member 28 having a generally round plate portion 30 disposed on the flange 18 to close off the housing recess 20, having a pair of arms 32 which extend radially outward from the heat sink plate portion and upwardly along the flange 18 (see FIG. 3), and having respective, integral rivet pin members 34 which extend up from the ends of the arms 32.
  • the rivets 34 extend through apertures 36 in the housing 12 and through apertures 38 in respective ground plates 40 (see FIG. 1) and are flattened at their ends to secure the plate portion of the heat-sink member firmly against the housing flange 18 and to secure each of the ground plates 40 firmly against the outer surfaces of the housing.
  • the heat sink member 28 has a bushing portion 44 which may comprise a separate element secured to the remainder of the heat-sink member as shown or which may be formed as an integral part of the heat-sink member.
  • the heat-sink member is formed of a metal of high thermal conductivity and typically the heat-sink member is formed of cold rolled steel having the bushing 44 formed of brass.
  • thermostat metal coil 48 is fitted snugly into one of the bushing slots, the thermostat metal coil being spirally wound from composite, multilayer thermostat metal strip and being provided at its opposite end with a tang 52 which extends radially outward from the coil.
  • the thermostat metal coil has a layer of metal 48.1 of relatively high coefficient of thermal expansion metallurgically bonded to a second layer of metal 48.2 of relatively lower coefficient of thermal expansion. The fitting of the coil end 50 into the bushing slot securely attaches the thermostat metal coil to the heat-sink member 28 and holds the coil end 50 in fixed position in the control 10.
  • the spiral coil 48 unwinds and moves the coil tang 52 (in a clockwise direction relative to the control as viewed in FIG. 1) as the thermostat metal coil is heated.
  • the bushing slot 46 is crimped after insertion of the coil end in the slot for assuring secure attachment of the coil to the bushing.
  • two self-regulated electrical resistance heaters 54 and 56 are secured to the heat-sink member 28 within the housing recess 20 so that each of the heaters is thermally coupled to the thermostat metal coil 48 through the heat-sink member.
  • each of the heaters 54 and 56 comprises a body 54.1, 56.1 of resistive material having opposite metal surface layers 54.2, 56.2 and 54.3, 56.3 secured thereto to serve as electrical contacts for the heaters.
  • the heater contact layers 54.3 and 56.3 are preferably secured to the heat-sink member 28 by use of a metalfilled, electrically-conductive epoxy adhesive or the like or may be soldered tothe heat-sink if desired.
  • the heater bodies 54.1 and 56.1 are formed of a material which has a positive temperature coefficient of resistance and which is adapted to display very low resistance as electrical current is directed through the resistive material at room temperature but which is adapted to be self-heated within a very brief period of time to an anomaly temperature at which the resistance of the heater material very sharply r s Bial1 f.
  • the heater a body portion 54.1 of a thickness of about 0.060 inches and a diameter of about 0.630 inches and is formed of lanthanum-doped barium titanate having the empirical formula Ba,,, La, TiO
  • This heater displays a resistance of about 1.5 to 3.5 ohms at room temperature and a resistance of several thousand ohms at an anomaly temperature of about 120C.
  • the heater 56 typically is of the same material and thickness and is of smaller diameter to display about 8 ohms resistance at room temperature.
  • Electrical resistance heaters of this type are self-regulating in that, as the heaters reach their anomaly temperature and display sharply increased resistance, current in the heaters is reduced so that the heater temperature is stabilized at about 120C., subsequent current in the resistors serving to maintain the heaters at this temperature.
  • the two self-regulating heaters 54 and 56 are described as being formed of the same positive temperature coefficient material with the two heaters being of different diameter to provide different room temperature resistances, the heaters could be of the same size or the heater 56 could be formed of a material displaying a lower or higher anomaly or stabilization temperature within the scope of this invention.
  • self-regulating heaters of the type described are relatively insensitive to voltage variations from 6 to 16 volts (d.c.) and can withstand voltage surges ten times greater than normal voltage levels. These heater materials are therefore well suited for use in automotive electrical systems.
  • these selfregulating heaters are each arranged to heat the same heat-sink member but are adapted to be energized under different conditions.
  • a spring contact member 58 of electrically conductive metal material is secured to the housing 12 within the housing recess 20 by means of an electrically conductive metal rivet 60 so that the spring contact member resiliently engages the contact surface layer 54.2 of the heater 54, one end 60.1 of the rivet extending into the housing recess 24 to serve as an electrical contact.
  • a snapacting thermostat metal disc 62 having an opening 62.1 therein is also placed in the housing recess 24 with its disc perimeter resting on the housing shoulder 26.
  • An additional spring contact member 64' of spider-like configuration is provided with an electricalcontact 66 secured at the center of the spider and is arranged in the housing recess 24 on top of the thermostatic disc 62 with the spider contact 66 fitted into the disc opening 62.1 as shown in FIG. 2.
  • an electrical'contact plate 68 having a terminal portion 68.1- is disposed over the housing recess 24 along with a layer of dielectric material and is secured to the housing with the dielectric layer by screw means 72 or the like, thereby to retain the thermostat disc 62 and the spring contact spider 64 within the housing recess.
  • the thermostatic disc 62 is formed of a selected bimetallic material and is provided with a selected dished configuration in conventional manner so that, at a selected ambient temperature, below 60F.
  • the disc is disposed as shown in FIG. 2 to hold the spider contact 66 out of engagement with the rivet contact 60.] but so that, at ambient temperatures above 60F, the disc 62 moves with snap-action to the inverted dished configuration shown in FIG. 3 to engage the spider contact 66 with the rivet contact 60.1.
  • a gasket member 74 is clamped between the contact plate 68 and the housing 12 around the recess 24 as shown in FIGS. 2 and 3 for effectively sealing the housing recess 74 against environmental moisture.
  • an additional spring contact 76 of electrically conductive metal material is also secured to the housing 12 within the housing recess 20 by a rivet 78 so that the spring contact 76 resiliently engages the contact surface layer 56.2 of the heater 56, the rivet 78 also serving to assist in securing the contact plate 68 onto the housing and to electrically connect the spring contact member 76 to the contact plate 68 as shown in FIG. 2.
  • the choke control 10 abovedescribed is adapted to be mounted on a conventional automotive carburetor for regulating the operation of the choke valve in the carburetor.
  • carburetors are well known, the detailed construction of the carburetor is not shown but it will be understood that the carburetor includes a bell-crank indicated by the broken lines 80 in FIGS. 2 and 3 which is adapted to be rotated for opening and closing a choke valve (not shown) through appropriate conventional linkage, the bellcrank being located in a metal bell-crank housing indicated by the broken lines 82.
  • a conduit indicated by broken lines 84 is arranged to conduct warm gasses from the exhaust manifold of a motor into the bell-crank housing as indicated by the arrow 86 in FIG. 2 so that the bellcrank housing chamber is heated by such gasses as the temperature of the motor increases after starting of the motor.
  • the control 10 is mounted on the bell-crank housing 82 of the conventional carburetor by means of a metal ring clamp indicated by the broken lines 88 so that the thermostat metal coil 48 of the control is disposed to engage the bell-crank 80 as shown in FIG. 2.
  • the metal ring clamp 88 in engaging the ground plates 40 on the control 10, serves to connect the ground plates to the metal bellcrank housing 82 for electrically grounding the control 10.
  • the choke control 10 is adapted to be rotated as it is mounted on the bell-crank housing 82 with the clamp 88 loosened until the tang 52 of the thermostat metal coil in the choke control engages the bell-crank 80 with selected pressure at a predetermined coil temperature as illustrated in FIG. 2.
  • the choke control 10 is adapted to be electrically connected to a power source such as the automotive battery 90, or to the automotive alternator or to other power sources if desired, through the ignition switch 92 by making electrical connection to the contact plate terminal portion 68.1.
  • the choke control of this invention provides choke regulation in a manner which significantly reduces the quantity of pollutants in the exhaust gasses discharged by the motor while the motor is heating up to its normal operating temperature. That is, as has been described, the thermostat metal coil is arranged in the control 10 so that, when the control is mounted on a selected part of the motor such as the bell-crank housing 82 of the carburetor, the thermostat metal coil of the control is adapted to move the bellcrank 80 as the coil is heated.
  • thermostat metal coil 48 required in a choke control will be of considerable length and mass in order to provide the torque force required to move a conventional carburetor choke valve and in order to provide the 45 angular movement of the bell-crank 80 necessary to open a choke valve in the conventional carburetor to the 45 angle which is considered as comprising its fully open position.
  • thermostat metal coil has been heated by heat-transfer from the motor as the motor increases in temperature as in the conventional choke control
  • a considerable period of time is required after motor starting before the large mass of the thermostat metal coil is heated from the 0 ambient temperature to the coil temperature at which the coil begins to unwind to move the bell-crank 80 to begin to initiate the opening cycle of the carburetor choke valve.
  • the carburetor is providing a fuel mixture of maximum richness to the motor even though, immediately after starting, the motor could operate with a leaner mixture to reduce pollution emission during much of this period.
  • the heater 56 is immediately energized on starting of the motor and is quickly heated to its anomaly or stabilization temperature.
  • the heat-sink member 28 is quickly heated toward the stabilization temperature of the heater 56,and the thermostat metal coil 48, thermally-coupled to the heater 56 through the heatsink member 28, is rapidly heated to the coil temperature at which the coil begins to unwind to open the choke valve even when the motor is started under low ambient temperature conditions.
  • the coil continues to move at a selected rate to open the carburetor choke valve. That is, as shown in FIGS.
  • thermostat metal coil 48 were to be heated only by heat-transfer from a motor after starting as in the conventional choke control, heating of the coil to the temperature required for unwinding the coil to the point where the coil would open a choke valve to its fully open position would necessarily lag behind the time when the motor had reached its normal operating temperature. This is particularly true because closing of the choke tends to become quite slow in its final stages when the gradually diminishing difference in temperature between the heat-sink and the coil slows the rate of increase in temperature of the coil. During this lag period, the choke control would also be providing a richer fuel mixture than necessary to the motor so that excessive pollution emission would again occur. In this regard, it is found that, particularly when ambient temperature is relatively high, above 60F. for example, this lag period tends to result in significant degree of unnecessary emission of exhaust gas pollutants.
  • the thermostat disc 62 functions as an ambient temperature sensing switch.
  • the heater 54 is immediately energized as the motor is started through the contact plate 68, the spider 64 and its contact 66, the rivet 60, the spring contact 58, the heater 54, the heat-sink member 28 and the ground plates to the bell-crank housing 82.
  • the heaters 54 and 56 cooperate to heat the heat-sink member 28 more quickly than when only the heater 56 has been energized.
  • the thermostat metal coil 48 is very quickly heated to the temperature necessary to move the bell-crank 80 for fully opening the carburetor choke valve after motor starting to again minimize pollution emission in exhaust gasses from the motor.
  • heat-transfer occurs in the control 10 from the heat sink 28 to the thermostatic disc 62 even when the motor is started at ambient temperatures below 60F. so that the disc 62 ultimately moves to the position shown in FIG. 3 under most ambient temperature conditions for energizing the heater 54 after the thermostat metal coil 48 has been substantially heated by the heater 56.
  • the disc 62 is usually actuated to move to its closed circuit position shown in FIG. 3 during the choke regulation cycle and actuation of the disc 62 serves to assure that heating of the coil 48 is promptly completed even at temperatures lower than 60F.
  • the control 10 of this invention is adapted to promptly begin to open and to achieve complete choke opening in 20 seconds or less after motor starting at F. With similar prompt initiation of opening, the control achieves full opening in about 60 seconds at 60F. and in about 300 seconds at 0F.
  • each of the heaters 54 and 56 is of the self-regulating type such that they display low electrical resistance when first heated but display sharply increasing resistance as the heaters are self-heated to their anomaly or stabilization temperatures. In this way, heating of the heaters above their anomaly or stabilization temperature is inherently prevented. As a result, power consumption by the heaters after reaching their anomaly temperatures is very low and overheating of the heaters is inherently prevented for assuring long heater life. It will be understood that, where the choke control 10 of this invention is used to regulate a carburetor where the bell-crank housing of the carburetor is heated by warm gasses conducted thereto as indicated by the arrow 86 in FIG.
  • the mounting of the control 10 above-described is effective to dispose the thermostat coil 48 of the control in heat-transfer relation to the motor. Accordingly, the heaters 54 and 56 are proportioned to cooperate with heat transferred to the coil 48 from the motor for assuring that choke opening occurs at desired rates as above-described.
  • a self-regulating electrical resistance heater 94 of the type previously described with reference to heaters 54 and 56 is provided with a body portion 94.1 of the lanthanum-doped barium titanate material and with metal surface layers 94.2 and 94.3 to serve as electrical contacts for the heater.
  • the metal surface layer 94.2 is then scribed or otherwise machined as indicated at 96 to divide the contact surface layer 94.2 into two portions a and b as indicated in FIG. 6.
  • This electrical heater element is then disposed in the choke control 100 illustrated in FIG. 5.
  • the choke control 100 is generally similar to the choke control 10 previously described and corresponding components therein are identified by reference numerals as used in describing the control 10.
  • the separate heaters 54 and 56 are replaced with the single heater element 94 as illustrated in FIG. 6, the heater element 94 being arranged in the control 100 so that the spring contact 58 engages the contact surface portion 94.2 a of the heater whereas the spring contact 76 engages the contact surface portion 94.2b of the heater.
  • the heater is effectively energized only between the contact surface areas 94.2b
  • the heater 96 functions like the heater 56 of the choke control 10.
  • the full heater 96 is energized to deliver heat to the heat-sink member 28 and heater 96 functions like the heaters 54 and 56 in the choke control 10.
  • the location of the scribe line 96 is selected to provide these two portions of the heater 96 with the desired relative heating properties for achieving the type of choke control action desired.
  • the choke control 110 of this invention is provided with a self-regulated electrical resistance heater which is thermally-coupledto the thermostatic disc switch 62 for assuring full opening of a choke valve promptly after motor starting.
  • the choke control 110 illustrated in FIG. 7 is provided with a self-regulated electrical resistance heater which is thermally-coupledto the thermostatic disc switch 62 for assuring full opening of a choke valve promptly after motor starting.
  • the housing recess 24 is enlarged to form two separate portions 24.1 and 24.2 in communication with each other.
  • the selfregulating resistance heater 56 is then mounted in the recess portion 24.2 on a metal base plate 112.
  • An additional spider contact member 1 14 having a contact 1 16 therein is then disposed in the recess portion 24.2 for electrically engaging the heater 56 and the contact plate 68.
  • the base plate 112 is then electrically connected to the heat-sink member 28 by means of a rivet 118 and by a conductive metal strap 120, the rivet being joined to the base plate and the strap for securing these members to the housing 12 as shown in FIG. 7 and the other end of the strap 120 (not shown) being held against the housing 12 by engagement of the strap end between a heat-sink arm 32 and the housing by a heat-sink rivet pin 34 as will be understood.
  • closing of the ignition switch 92 for starting a motor at temperatures below 60F. ambient temperature immediately energizes the heater 56 in the control 110.
  • This heater 56 is thermally-coupled to the thermostatic disc switch-62 in the other portion 24.1 of the housing recess so that, after a selected brief period of time, the disc 62 moves by snap-action to energize the heater S4 in the manner previously described.
  • the thermostat metal coil is rapidly heated to initiate opening of the choke and then, after a selected further period of time is fully heated for fully opening the carburetor choke valve.
  • Control means for adjusting a choke in an automotive motor system as motor temperature increases after initiation of motor operation while modifying the period of choke adjustment in accordance with ambient temperature comprising heatresponsive means movable in response to increase in temperature of said heat-responsive means for adjusting said choke, first electrical heater means disposed in heat-transfer relation to said heat-responsive means for heating said heat-responsive means when said first heater means is energized, thermostatic switch means connectable to an electrical power source upon initiation of said motor operation and actuable above a se lected ambient temperature for energizing said first heater means, and additional electrical heater means energizable from an electrical power source upon initiation of said motor operation for accelerating heating of said heat-responsive means.
  • Control means as set forth in claim 1 having housing means enclosing said heat-responsive means for mounting said heat-responsive means in heat-transfer relation to said motor.
  • Control means for adjusting a choke in an automotive motor system as motor temperature increases after initiation of motor operation while modifying the period of choke adjustment in accordance with ambient temperature comprising a thermostat metal coil movable in response to increase in coil temperature for adjusting said choke, electrical heater means disposed in heat-transfer relation to said coil and energizable from an electrical power source upon initiation of said motor operation for heating said coil, additional electrical heater means disposed in heattransfer relation to said coil for supplementing heating of said coil when said additional heater means is energized, and thermostatic switch means connectable to an electrical power source upon initiation of said motor operation and actuable above a selected ambient temperature for energizing said additional heater means.
  • each of said electrical heater means comprises an electrical resistance heater element of a self-regulating type which has a positive temperature coefficient of resistance and which is adapted to self-heat when electrically energized to reach a selected temperature at which the resistance of the heater element sharply increases for stabilizing the temperature of the heater element at a selected level.
  • Control means as set forth in claim 4 having housing means enclosing said thermostat metal coil for mounting said coil in heat-transfer relation to said motor.
  • Control means for adjusting a choke in an automotive motor system as motor temperature increases after initiation of motor operation while modifying the period of choke adjustment in accordance with ambient temperature comprising a thermostat metal coil movable in response to increase in coil temperature for adjusting said choke, heat-sink means mounting said coil for said movement thereon, selfregulating electrical resistance means mounted on said heat-sink means in heat-transfer relation to said coil and energizable from an electrical power source upon initiation of said motor operation for heating said coil, additional self-regulating electrical resistance means mounted on said heat-sink means in heat-transfer relation to said coil for supplementing heating of said coil when said additional heater means is energized, and thermostatic switch means connectable to an electrical power source upon initiation of said motor operation and actuable above a selected ambient temperature for energizing said additional heater means.
  • said heat-sink member comprises a metal bushing having one end of said thermostat metal coil secured to said bushing, said thermostat metal coil being spirally wound around said bushing, said heat-sink member having a plate portion mounting said bushing and having one surface of said heat-sink plate portion extending along a lateral edge of said spirally wound thermostat metal coil, said electrical heater means each being mounted on an opposite surface of said heat-sink plate portion in heat-transfer relation to said coil through said heat-sink member.
  • Control means for adjusting a choke in an automotive motor system as motor temperature increases after initiation of motor operation while modifying the period of choke adjustment in accordance with ambient temperature comprising a housing of dielectric material having a body portion defining a housing chamber and having a flange portion defining a housing recess within said chamber, a heat-sink member of thermally and electrically conductive metal material having a heat-sink plate portion mounted on said housing flange portion over said housing recess, said heat-sink member being connectable to electrical ground and having a bushing portion extending from said plate portion into said housing chamber, a thermostat metal coil secured at one end to said heat-sink bushing portion and extending spirally around said bushing portion along one surface of said heat-sink plate portion within said housing chamber, said coil being movable in response to increase in coil temperature for adjusting said choke, self-regulating electrical resistance heater means having one end mounted on an opposite surface of said heat-sink plate portion within said housing recess in electrically conductive relation to said heat-
  • each of said electrical heaters comprises a body of resistive material which has a positive temperature coefficient of resistance and which is adapted to self-heat when electrically energized to reach a selected temperature at which resistance of said material sharply increases for stabilizing heater temperature at a selected level, said body of resistive material having a layer of metal secured to each of two opposite sides thereof forming electrical contacts for said heater.
  • Control means for adjusting a choke in an automotive motor system as motor temperature increases after initiation of motor operation while modifying the period of choke adjustment in accordance with ambient temperature comprising a housing of dielectric material having a body portion defining a housing chamber and having a flange portion defining a housing recess within said chamber; a heat-sink member of thermally and electrically conductive metal material having a heat-sink plate portion mounted on said housing flange portion over said housing recess, said heat-sink member being connectable to electrical ground and having a bushing portion extending from said plate portion into said housing chamber; a thermostat metal coil secured at one end to said heat-sink bushing portion and extending spirally around said bushing portion along one surface of said heat-sink plate portion within said housing chamber, said coil being movable in response to increase in coil temperature for adjusting said choke; an electrical resistance heater means having a body of resistive material which has a positive temperature coefficient of resistance and which is adapted to self-heat when electrically energized to
  • Control means for adjusting a choke in an automotive motor system as motor temperature increases after initiation of motor operation while modifying the period of choke adjustment in accordance with ambient temperature comprising a thermostat metal coil movable in response to increase in coil temperature for adjusting said choke, first electrical heater means disposed in heat-transfer relation to said coil for heating said coil when said first heater means is energized, thermostatic switch means connectable to an electrical power source upon initiation of said motor operation and actuable above a selected switch temperature for energizing said first heater means, said thermostatic switch means being disposed to be actuated in response to ambient temperature above said selected switch temperature, and additional heater means disposed in heat-transfer relation to said switch means, said additional heater means being energizable from an electrical power source upon initiation of said motor operation for heating said switch means to said selected switch temperature subsequent to initiation of said motor operation when ambient temperature is below said selected switch temperature.
  • each of said electrical heater means comprises an electrical resistance heater element of a self-regulating type which has a positive temperature coefficient of resistance and which is adapted to self-heat when electrically energized to reach a selected heater temperature at which the resistance of the heater means sharply increases for stabilizing the temperature of said heater means at said selected heater temperature.
  • Control means as set forth in claim 14 having housing means enclosing said thermostat metal coil for mounting said coil in heat-transfer relation to said motor.
  • a multiple element electrical heater means comprising a body of resistive material which has a positive temperature coefficient of resistance and which is adapted to self-heat when electrically energized to reach a temperature at which resistance of said mate- .rial sharply increases for stabilizing said material temperature at a selected level, a layer of metal secured to one side surface of said body of resistive material formjng org electrical contact for said heater, and at least two portions of a layer of metal secured in spaced relation to each other on an opposite side surface of said body of resistive material forming additional electrical contacts for said heater, whereby electrical current is adapted to be directed through portions of said body of resistive material between said one electrical contact and one or more of said additional electrical contacts for electrically heating selected portions of said body of resistive material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Means For Warming Up And Starting Carburetors (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
US00312428A 1972-12-05 1972-12-05 Control for automotive choke Expired - Lifetime US3806854A (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
US00312428A US3806854A (en) 1972-12-05 1972-12-05 Control for automotive choke
GB4394473A GB1447275A (en) 1972-12-05 1973-09-19 Control for automotive choke valve
GB1590876A GB1449807A (en) 1972-12-05 1973-09-19 Heater element
IT7353072A IT994399B (it) 1972-12-05 1973-10-11 Perfezionamento nelle disposizioni di controllo della valvola dell aria in motori per auto veicoli
DD174145A DD111235A5 (de) 1972-12-05 1973-10-18
YU02819/73A YU36405B (en) 1972-12-05 1973-10-29 Regulator for n automatic damper of a carburetor
JP48125847A JPS4986725A (de) 1972-12-05 1973-11-08
FR7340957A FR2209047B1 (de) 1972-12-05 1973-11-16
RO76830A RO90997B (ro) 1972-12-05 1973-11-29 Dispozitiv de reglare a socului unui motor de autovehicul
PL1973167018A PL89875B1 (de) 1972-12-05 1973-12-03
SU731987942A SU797605A3 (ru) 1972-12-05 1973-12-04 Устройство дл управлени воздушнойзАСлОНКОй КАРбюРАТОРА дВигАТЕл ВНуТ-РЕННЕгО СгОРАНи
HU73TE751A HU175425B (hu) 1972-12-05 1973-12-04 Reguljator k ustanovke drossel'ja pri vsasyvanii vozdukha dlja avtomobil'nogo dvigatelja, a tak zhe ehlektricheskij otopitel'nyj ehlement k reguljatoru
SE7316375A SE405393B (sv) 1972-12-05 1973-12-04 Regleringsanordning for en automatisk fordonschoke
CS738388A CS209467B2 (en) 1972-12-05 1973-12-05 Regulation device for adjusting the choke position
DE2360454A DE2360454A1 (de) 1972-12-05 1973-12-05 Steuervorrichtung zum verstellen einer luftklappe in einem kraftfahrzeugmotorsystem
SU762326946A SU797606A4 (ru) 1972-12-05 1976-03-02 Устройство дл управлени воздушнойзАСлОНКОй КАРбюРАТОРА
SE7614400A SE7614400L (sv) 1972-12-05 1976-12-21 Elektrisk uppvermningsanordning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00312428A US3806854A (en) 1972-12-05 1972-12-05 Control for automotive choke

Publications (1)

Publication Number Publication Date
US3806854A true US3806854A (en) 1974-04-23

Family

ID=23211396

Family Applications (1)

Application Number Title Priority Date Filing Date
US00312428A Expired - Lifetime US3806854A (en) 1972-12-05 1972-12-05 Control for automotive choke

Country Status (14)

Country Link
US (1) US3806854A (de)
JP (1) JPS4986725A (de)
CS (1) CS209467B2 (de)
DD (1) DD111235A5 (de)
DE (1) DE2360454A1 (de)
FR (1) FR2209047B1 (de)
GB (2) GB1449807A (de)
HU (1) HU175425B (de)
IT (1) IT994399B (de)
PL (1) PL89875B1 (de)
RO (1) RO90997B (de)
SE (2) SE405393B (de)
SU (2) SU797605A3 (de)
YU (1) YU36405B (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972311A (en) * 1974-11-20 1976-08-03 Depetris Peter S Electronic choke control
US3980065A (en) * 1974-04-10 1976-09-14 Honda Giken Kogyo Kabushiki Kaisha Automatic actuator for carburetor choke valve
US3987772A (en) * 1975-03-10 1976-10-26 Texas Instruments Incorporated Self-regulating heater
US4007720A (en) * 1974-07-30 1977-02-15 Robert Bosch G.M.B.H. Fuel metering system for internal combustion engines
US4038955A (en) * 1974-03-19 1977-08-02 Societe Industrielle De Brevets Et D'etudes S.I.B.E. Automatic choke systems for carburetors
US4058097A (en) * 1975-06-30 1977-11-15 Texas Instruments Incorporated Choke control
DE2629610A1 (de) * 1976-07-01 1978-01-12 Audi Nsu Auto Union Ag Vorrichtung zur beheizung eines saugrohres einer fremdgezuendeten brennkraftmaschine
US4081499A (en) * 1976-06-15 1978-03-28 Honda Giken Kogyo Kabushiki Kaisha Carburetor with electric heating type autochoke device
US4096837A (en) * 1975-12-16 1978-06-27 Honda Giken Kogyo Kabushiki Kaisha Automatic choking device of electric heating type
US4131657A (en) * 1977-03-10 1978-12-26 Gte Sylvania Incorporated Electric automotive choke
US4132211A (en) * 1975-10-24 1979-01-02 Robert Bosch Gmbh Fuel injection system
US4201735A (en) * 1978-09-08 1980-05-06 Fasco Industries, Inc. Method of manufacturing a choke control device
US4237077A (en) * 1978-08-29 1980-12-02 Texas Instruments Incorporated Automatic choke system
US4311653A (en) * 1977-11-10 1982-01-19 Texas Instruments Incorporated Fast idle carburetor system
US4331615A (en) * 1980-11-06 1982-05-25 Texas Instruments Incorporated Fuel supply system with automatic choke
US4496496A (en) * 1982-11-01 1985-01-29 Texas Instruments Incorporated Fuel supply system with electric choke and control therefor
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
US20170130676A1 (en) * 2015-11-05 2017-05-11 Ini Power Systems, Inc. Thermal choke, autostart generator system, and method of use thereof
US10054081B2 (en) 2014-10-17 2018-08-21 Kohler Co. Automatic starting system
USD827572S1 (en) 2015-03-31 2018-09-04 Ini Power Systems, Inc. Flexible fuel generator

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5265849A (en) * 1975-11-28 1977-05-31 Hitachi Ltd Device for fixing ptc elements
JPS5371731A (en) * 1976-12-06 1978-06-26 Aisan Ind Co Ltd Electric auto-choke mechanism for carbureter
JPS5392043A (en) * 1977-01-21 1978-08-12 Hitachi Ltd Electrical auto-choke
JPS5453714A (en) * 1977-10-06 1979-04-27 Toyota Motor Corp Internal combustion engine fuel injector
DE7825072U1 (de) * 1978-08-23 1978-12-21 Pierburg Gmbh & Co Kg, 4040 Neuss Vorrichtung zur beheizung eines saugrohres einer fremdgezuendeten brennkraftmaschine
JPS581640Y2 (ja) * 1979-03-19 1983-01-12 マツダ株式会社 エンジンの暖機状態検出装置
JPS551968U (de) * 1979-03-22 1980-01-08
JPS5815616B2 (ja) * 1979-10-06 1983-03-26 愛三工業株式会社 内燃機関用気化器のチョ−ク弁自動調節装置
JPS55137243U (de) * 1980-04-02 1980-09-30
JPS5659953U (de) * 1980-07-02 1981-05-22
US4419564A (en) * 1981-03-30 1983-12-06 Texas Instruments Incorporated Self-regulating electric heater for use in an early fuel evaporation system
JPS5835653U (ja) * 1981-09-03 1983-03-08 三國工業株式会社 始動装置のワツクス加熱調整回路
DE3612058A1 (de) * 1986-04-10 1987-10-15 Bockelmann Wilfried Dipl Ing Verfahren zur einstellung von vergasern
JPH0579894U (ja) * 1992-03-28 1993-10-29 株式会社村田製作所 正特性サーミスタ発熱装置
EP1967719B1 (de) * 2007-03-09 2009-05-13 Magneti Marelli S.p.A. Ventil zur Steuerung des Luftdurchsatzes in einer Brennkraftmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2381751A (en) * 1932-12-16 1945-08-07 Bendix Stromberg Carburetor Co Carburetor
US2987595A (en) * 1959-03-03 1961-06-06 Honeywell Regulator Co Control apparatus
US3529585A (en) * 1968-01-29 1970-09-22 Gen Motors Corp Internal combustion engine fuel system

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FR969619A (fr) * 1948-07-17 1950-12-22 Solex Perfectionnements apportés aux commandes automatiques, par thermostat, des dispositifs qui doivent fonctionner en dessous d'une température déterminée, notamment à celles des dispositifs auxiliaires facilitant la mise en marche, à froid, des moteurs à combustion interne
FR1300840A (fr) * 1961-06-26 1962-08-10 Sibe Perfectionnements apportés aux moyens de commande automatique des dispositifs de départ de carburateurs pour moteurs à combustion interne
DE1814685A1 (de) * 1968-12-14 1970-06-25 Daimler Benz Ag Automatische Kaltstartvorrichtung
FR215189A (de) * 1971-08-04
US3752133A (en) * 1972-11-15 1973-08-14 Ford Motor Co Multiple heat automatic choke

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2381751A (en) * 1932-12-16 1945-08-07 Bendix Stromberg Carburetor Co Carburetor
US2987595A (en) * 1959-03-03 1961-06-06 Honeywell Regulator Co Control apparatus
US3529585A (en) * 1968-01-29 1970-09-22 Gen Motors Corp Internal combustion engine fuel system

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038955A (en) * 1974-03-19 1977-08-02 Societe Industrielle De Brevets Et D'etudes S.I.B.E. Automatic choke systems for carburetors
US3980065A (en) * 1974-04-10 1976-09-14 Honda Giken Kogyo Kabushiki Kaisha Automatic actuator for carburetor choke valve
US4007720A (en) * 1974-07-30 1977-02-15 Robert Bosch G.M.B.H. Fuel metering system for internal combustion engines
US3972311A (en) * 1974-11-20 1976-08-03 Depetris Peter S Electronic choke control
US3987772A (en) * 1975-03-10 1976-10-26 Texas Instruments Incorporated Self-regulating heater
US4058097A (en) * 1975-06-30 1977-11-15 Texas Instruments Incorporated Choke control
US4132211A (en) * 1975-10-24 1979-01-02 Robert Bosch Gmbh Fuel injection system
US4096837A (en) * 1975-12-16 1978-06-27 Honda Giken Kogyo Kabushiki Kaisha Automatic choking device of electric heating type
US4081499A (en) * 1976-06-15 1978-03-28 Honda Giken Kogyo Kabushiki Kaisha Carburetor with electric heating type autochoke device
DE2629610A1 (de) * 1976-07-01 1978-01-12 Audi Nsu Auto Union Ag Vorrichtung zur beheizung eines saugrohres einer fremdgezuendeten brennkraftmaschine
US4131657A (en) * 1977-03-10 1978-12-26 Gte Sylvania Incorporated Electric automotive choke
US4311653A (en) * 1977-11-10 1982-01-19 Texas Instruments Incorporated Fast idle carburetor system
US4237077A (en) * 1978-08-29 1980-12-02 Texas Instruments Incorporated Automatic choke system
US4201735A (en) * 1978-09-08 1980-05-06 Fasco Industries, Inc. Method of manufacturing a choke control device
US4331615A (en) * 1980-11-06 1982-05-25 Texas Instruments Incorporated Fuel supply system with automatic choke
US4496496A (en) * 1982-11-01 1985-01-29 Texas Instruments Incorporated Fuel supply system with electric choke and control therefor
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
USD827572S1 (en) 2015-03-31 2018-09-04 Ini Power Systems, Inc. Flexible fuel generator
US20170130676A1 (en) * 2015-11-05 2017-05-11 Ini Power Systems, Inc. Thermal choke, autostart generator system, and method of use thereof
US10030609B2 (en) * 2015-11-05 2018-07-24 Ini Power Systems, Inc. Thermal choke, autostart generator system, and method of use thereof
US11274634B2 (en) * 2015-11-05 2022-03-15 Ini Power Systems, Inc. Thermal choke, autostart generator system, and method of use thereof
US11655779B2 (en) 2015-11-05 2023-05-23 The Dewey Electronics Corporation Thermal choke, autostart generator system, and method of use thereof

Also Published As

Publication number Publication date
CS209467B2 (en) 1981-12-31
YU281973A (en) 1981-11-13
FR2209047A1 (de) 1974-06-28
RO90997B (ro) 1987-02-28
RO90997A (ro) 1987-02-27
DD111235A5 (de) 1975-02-05
SU797605A3 (ru) 1981-01-15
SE7614400L (sv) 1976-12-21
PL89875B1 (de) 1976-12-31
SE405393B (sv) 1978-12-04
JPS4986725A (de) 1974-08-20
IT994399B (it) 1975-10-20
DE2360454A1 (de) 1974-06-06
FR2209047B1 (de) 1979-01-26
SU797606A4 (ru) 1981-01-15
GB1447275A (en) 1976-08-25
GB1449807A (en) 1976-09-15
YU36405B (en) 1983-06-30
DE2360454C2 (de) 1988-09-01
HU175425B (hu) 1980-07-28

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