US3334812A - Quick response thermostatic valve - Google Patents

Quick response thermostatic valve Download PDF

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Publication number
US3334812A
US3334812A US517763A US51776365A US3334812A US 3334812 A US3334812 A US 3334812A US 517763 A US517763 A US 517763A US 51776365 A US51776365 A US 51776365A US 3334812 A US3334812 A US 3334812A
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United States
Prior art keywords
valve
valve element
frame
opening
motor
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Expired - Lifetime
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US517763A
Inventor
Bailey Charles Stimets
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Motors Liquidation Co
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Motors Liquidation Co
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Publication date
Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
Priority to US517763A priority Critical patent/US3334812A/en
Priority to GB56193/66A priority patent/GB1132280A/en
Priority to FR89099A priority patent/FR1506854A/en
Application granted granted Critical
Publication of US3334812A publication Critical patent/US3334812A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
    • G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
    • G05D23/022—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed within a regulating fluid flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control

Definitions

  • ABSTRACT OF THE DISCLOSURE A thermostatic valve for controlling engine coolant flow to a radiator and in which a wax pellet type temperature sensitive motor for actuating the valve is insulated from the cold side of the valve and also in which engine block coolant pressure tends to open the valve when the latter is closed or almost closed by spring pressure.
  • the United States patent to Woods 2,797,873 discloses a thermostatic valve which is influenced to open by engine block coolant pressure acting against it and a temperature sensitive wax is enclosed in a motor on the cold side of the valve for actuating the latter against a tension spring plus the coolant pressure.
  • FIGURE 1 shows a portion of a cooling system for an internal combustion engine, a conduit being shown in section better to disclose the installation of a thermostatic valve incorporating features of the present invention
  • FIGURE 2 is an enlarged sectional view of the thermostatic valve and the adjacent valve supporting parts of the cooling system of FIGURE 1;
  • FIGURE 3 is a sectional view looking in the direction of the arrows 33 in FIGURE 2;
  • FIGURE 4 is a perspective view of a sleeve member utilized in the valve assembly of FIGURE 1.
  • FIGURE 1 an engine block connected to a radiator 12 by upper conduit means 14 and lower conduit means 16.
  • the upper conduit means 14 serves to retain an annular flange 20 of a valve frame 22.
  • This frame includes an imperforate cylindrical portion 24, an imperforate annular shoulder portion 26, an annular and downwardly converging frusto-conical seat portion 28 defining a main opening 29, and a bridge portion 30. Two openings such as the opening 32 are separated by the bridge portion 30.
  • the frame 22 also includes a base plate 34 and two oppositely disposed legs 36 and 38 joined to the shoulder portion 26 to define opposite openings 40 and 42.
  • the base plate 34 bears a flange 44 defining an opening 46.
  • the latter bears a cylindrical flange 52 encircling a plastic sleeve 54 freely received in the opening 46 of the frame 22.
  • the sleeve 54 is clearly shown in FIGURE 4 to include a flange 56 at one end. This flange is adapted to press upwardly against an annular inner shoulder 58 of the valve element 48 because of a movable part or casing 60 of a pellet motor.
  • the motor includes a plunger 62 fixed at 64 to the bridge portion 30. The motor is much like that ice the outside of the pellet motor casing 60.
  • the bleed notch 70 has been made with a radius of .035 inch and the volume of the space 72 has been made .026 cubic inch to give about 89 changes of coolant in the space 72 per minute.
  • valve element 48 rises and permits flow of coolant to the radiator 12 as the waX 66 is heated. If the car transmission downshifts during high speed acceleration, coolant pressure on the car heater core does not rise unduly and this is because the pump pressure counteracts against the spring pressure and blows open the valve.
  • the bleed notch 70 works together with the space 72 to reduce and often to eliminate the possibility of cycling or hunting as the valve starts to open as the engine warms up.
  • the plastic sleeve 54 cooperates with the casing 60 to provide a conduit or bleed passage for the coolant to bypass the main opening of the valve and to reach and wash the surface of the casing 60.
  • the pellet power element or motor therefore quickly senses any engine water temperature change.
  • the motor firmly operates on the bottom part of the wax melting curve (small volume change in the wax 61S per degree F. and slow valve element 48 movement per degree F.) during cold engine operation with the valve element 48 at or near its start-t'o-open position.
  • the sleeve 54 is made of insulation material such as ethyl cellulose plastic so that, the bleed coolant is not chilled by the coolant on the discharge side of the valve during engine warm-up periods.
  • insulation material such as ethyl cellulose plastic
  • a number of plastic compositions are suitable and will withstand the temperature and anti-freeze solution conditions to be encountered.
  • a thermostatic valve comprising a frame adapted to be mounted in a conduit, said frame having an annular seat defining a main opening with an inlet side and an outlet side, a valve element controlling said main opening, a thermostatic motor having two relatively movable parts, one of said parts being a plunger fixed to said frame on the said inlet side of said opening, the other of said parts containing temperature sensitive wax and being exposed at the outlet side of said opening, spring means interposed between said frame and said valve element at the outlet srde of said main opening and urging said valve element toward said annular seat, and a sleeve of heat insulating matenal interposed between said other part and said valve element and cooperating with said other part in defining a bleed passage by-passing said valve element and annular sea 2.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Temperature-Responsive Valves (AREA)

Description

Aug. 8, 1967 c. s. BAlLEY QUICK RESPONSE THERMOSTATIC VALVE Filed Dec. 50, 1965 IN VENTOR. G/m'r/es 5 504% 1 United States Patent 3,334,812 QUICK RESPONSE THERMOSTATIQ VALVE Charles Stimets Bailey, Lockport, N.Y. assrgnor to General Motors Corporation, Detroit, M1ch., a corporahon of Delaware Filed Dec. 30, 1965, Ser. No. 517,763 6 Claims. (Cl. 236-34) ABSTRACT OF THE DISCLOSURE A thermostatic valve for controlling engine coolant flow to a radiator and in which a wax pellet type temperature sensitive motor for actuating the valve is insulated from the cold side of the valve and also in which engine block coolant pressure tends to open the valve when the latter is closed or almost closed by spring pressure.
State of the prior art The United States patent to Clifford et al. 2,881,616 shows a thermostatic valve which tends to close when engine block coolant pressure acts against it in supplementing spring pressure and a wax pellet type motor is employed on the hot or engine side of the valve to act against the coolant and spring pressure.
The United States patent to Woods 2,797,873 discloses a thermostatic valve which is influenced to open by engine block coolant pressure acting against it and a temperature sensitive wax is enclosed in a motor on the cold side of the valve for actuating the latter against a tension spring plus the coolant pressure.
Description of the invention In the drawings:
FIGURE 1 shows a portion of a cooling system for an internal combustion engine, a conduit being shown in section better to disclose the installation of a thermostatic valve incorporating features of the present invention;
FIGURE 2 is an enlarged sectional view of the thermostatic valve and the adjacent valve supporting parts of the cooling system of FIGURE 1;
FIGURE 3 is a sectional view looking in the direction of the arrows 33 in FIGURE 2; and
FIGURE 4 is a perspective view of a sleeve member utilized in the valve assembly of FIGURE 1.
In FIGURE 1 is shown an engine block connected to a radiator 12 by upper conduit means 14 and lower conduit means 16. The upper conduit means 14 serves to retain an annular flange 20 of a valve frame 22. This frame includes an imperforate cylindrical portion 24, an imperforate annular shoulder portion 26, an annular and downwardly converging frusto-conical seat portion 28 defining a main opening 29, and a bridge portion 30. Two openings such as the opening 32 are separated by the bridge portion 30. The frame 22 also includes a base plate 34 and two oppositely disposed legs 36 and 38 joined to the shoulder portion 26 to define opposite openings 40 and 42. The base plate 34 bears a flange 44 defining an opening 46.
An annular valve element 48 when closed, as in FIG- URE 1, is seated on the seat portion 28 and is resiliently held thereon by a coil spring 50 interposed between the base plate 34 and the valve element. The latter bears a cylindrical flange 52 encircling a plastic sleeve 54 freely received in the opening 46 of the frame 22. The sleeve 54 is clearly shown in FIGURE 4 to include a flange 56 at one end. This flange is adapted to press upwardly against an annular inner shoulder 58 of the valve element 48 because of a movable part or casing 60 of a pellet motor. The motor includes a plunger 62 fixed at 64 to the bridge portion 30. The motor is much like that ice the outside of the pellet motor casing 60. In a typical in-- stallation, the bleed notch 70 has been made with a radius of .035 inch and the volume of the space 72 has been made .026 cubic inch to give about 89 changes of coolant in the space 72 per minute. These figures are exemplary only and will vary in accordance with engine requirements.
In operation of the valve, the valve element 48 rises and permits flow of coolant to the radiator 12 as the waX 66 is heated. If the car transmission downshifts during high speed acceleration, coolant pressure on the car heater core does not rise unduly and this is because the pump pressure counteracts against the spring pressure and blows open the valve.
The bleed notch 70 works together with the space 72 to reduce and often to eliminate the possibility of cycling or hunting as the valve starts to open as the engine warms up. The plastic sleeve 54 cooperates with the casing 60 to provide a conduit or bleed passage for the coolant to bypass the main opening of the valve and to reach and wash the surface of the casing 60. The pellet power element or motor therefore quickly senses any engine water temperature change. The motor firmly operates on the bottom part of the wax melting curve (small volume change in the wax 61S per degree F. and slow valve element 48 movement per degree F.) during cold engine operation with the valve element 48 at or near its start-t'o-open position. These factors practically eliminate hunting as there is no delay or overshooting of temperature.
The sleeve 54 is made of insulation material such as ethyl cellulose plastic so that, the bleed coolant is not chilled by the coolant on the discharge side of the valve during engine warm-up periods. A number of plastic compositions are suitable and will withstand the temperature and anti-freeze solution conditions to be encountered.
I claim:
1. A thermostatic valve comprising a frame adapted to be mounted in a conduit, said frame having an annular seat defining a main opening with an inlet side and an outlet side, a valve element controlling said main opening, a thermostatic motor having two relatively movable parts, one of said parts being a plunger fixed to said frame on the said inlet side of said opening, the other of said parts containing temperature sensitive wax and being exposed at the outlet side of said opening, spring means interposed between said frame and said valve element at the outlet srde of said main opening and urging said valve element toward said annular seat, and a sleeve of heat insulating matenal interposed between said other part and said valve element and cooperating with said other part in defining a bleed passage by-passing said valve element and annular sea 2. A thermostatic valve as set forth in claim 1, said sleeve r eing a plastic cylinder with a flange at one end, and said flange having a radially extending notch therein.
3. A thermostatic valve as set forth in claim 1, said bleed passage being a radial notch in series with an annular space, and the latter being coaxial with said motor.
4. A thermostatic valve as set forth in claim 1, said frame including a base plate on the outlet side of said main opening, an opening in said base plate, and the said other part of said motor extending into said base plate opening.
I 5. A thermostatic valve as set forth in claim 1, said frame including a bridge traversing said main opening and supporting said one motor part, and said spring means being a coil spring surrounding said one motor part.
6. A thermostatic valve as set forth in claim 1, said frame including a flange and a base plate having an opening therein, legs connecting said base plate to said flange, said sleeve and other motor part extending into said base plate opening, an annular space between said other motor part and the said sleeve and extending the full corresponding lengths of the sleeve and other motor part, and a References Cited UNITED STATES PATENTS Woods 236-93 Cliiford et al. 73363 Freismuth 23634 Kurz et al. 23693 X EDWARD 1. MICHAEL, Primary Examiner.

Claims (1)

1. A THERMOSTATIC VALVE COMPRISING A FRAME ADAPTED TO BE MOUNTED IN A CONDUIT, SAID FRAME HAVING AN ANNULAR SEAT DIFINING A MAIN OPENING WITH AN INLET SIDE AND AN OUTLET SIDE, A VALVE ELEMENT CONTROLLING SAID MAIN OPENING, A THERMOSTATIC MOTOR HAVING TWO RELATIVELY MOVABLE PARTS, ONE OF SAID PARTS BEING A PLUNGER FIXED TO SAID FRAME ON THE SAID INLET SIDE OF SAID OPENING, WAX AND BEING EXPOSED CONTAINING TEMPERATURE SENSITIVE WAX AND BEING EXPOSED AT THE OUTLET SIDE OF SAID OPENING, SPRING MEANS INTERPOSED BETWEEN SAID FRAME AND SAID VALVE ELEMENT AT THE OUTLET SIDE OF SAID MAIN OPENING AND URGING SAID VALVE ELEMENT TOWARD SAID ANNULAR SEAT, AND A SLEEVE OF HEAT INSULATING MATERIAL INTERPOSED BETWEEN SAID OTHER PART AND SAID VALVE ELEMENT AND COOPERATING WITH SAID OTHER PART IN DEFINING A BLEED PASSAGE BY-PASSING SAID VALVE ELEMENT AND ANNULAR SEAT.
US517763A 1965-12-30 1965-12-30 Quick response thermostatic valve Expired - Lifetime US3334812A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US517763A US3334812A (en) 1965-12-30 1965-12-30 Quick response thermostatic valve
GB56193/66A GB1132280A (en) 1965-12-30 1966-12-15 Thermo-responsive fluid flow control valve assemblies
FR89099A FR1506854A (en) 1965-12-30 1966-12-28 Heat sensitive valve

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US517763A US3334812A (en) 1965-12-30 1965-12-30 Quick response thermostatic valve

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US3334812A true US3334812A (en) 1967-08-08

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FR (1) FR1506854A (en)
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368692A (en) * 1979-08-31 1983-01-18 Shimadzu Co. Wind turbine
WO1997011262A1 (en) * 1995-09-19 1997-03-27 Standard-Thomson Corporation Thermostat having a movable weir valve
US20130180477A1 (en) * 2010-11-08 2013-07-18 Nippon Thermostat Co., Ltd. Internal combustion engine cooling device
US20150041552A1 (en) * 2012-02-22 2015-02-12 Vernet Thermostatic valve with a sleeve
US10048704B2 (en) 2013-10-22 2018-08-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Thermostatic valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106050395A (en) * 2016-08-11 2016-10-26 瑞安市万泰汽车电器有限公司 Engine electronic thermostat capable of conveniently controlling opening of valve

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797873A (en) * 1952-02-12 1957-07-02 Standard Thomson Corp Resilient telescoping diaphragm
US2881616A (en) * 1956-06-20 1959-04-14 Gen Motors Corp Thermostatic power elements
US2931576A (en) * 1956-11-28 1960-04-05 American Radiator & Standard Thermal valve for cooling system
US3258203A (en) * 1963-08-01 1966-06-28 Junkers & Co Hot-water heating system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797873A (en) * 1952-02-12 1957-07-02 Standard Thomson Corp Resilient telescoping diaphragm
US2881616A (en) * 1956-06-20 1959-04-14 Gen Motors Corp Thermostatic power elements
US2931576A (en) * 1956-11-28 1960-04-05 American Radiator & Standard Thermal valve for cooling system
US3258203A (en) * 1963-08-01 1966-06-28 Junkers & Co Hot-water heating system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4368692A (en) * 1979-08-31 1983-01-18 Shimadzu Co. Wind turbine
WO1997011262A1 (en) * 1995-09-19 1997-03-27 Standard-Thomson Corporation Thermostat having a movable weir valve
US20130180477A1 (en) * 2010-11-08 2013-07-18 Nippon Thermostat Co., Ltd. Internal combustion engine cooling device
US9777617B2 (en) * 2010-11-08 2017-10-03 Nippon Thermostat Co., Ltd. Internal combustion engine cooling device
US20150041552A1 (en) * 2012-02-22 2015-02-12 Vernet Thermostatic valve with a sleeve
US10048704B2 (en) 2013-10-22 2018-08-14 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Thermostatic valve

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Publication number Publication date
FR1506854A (en) 1967-12-22
GB1132280A (en) 1968-10-30

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