GB2042127A - Thermo-responsive valves - Google Patents

Thermo-responsive valves Download PDF

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Publication number
GB2042127A
GB2042127A GB7903679A GB7903679A GB2042127A GB 2042127 A GB2042127 A GB 2042127A GB 7903679 A GB7903679 A GB 7903679A GB 7903679 A GB7903679 A GB 7903679A GB 2042127 A GB2042127 A GB 2042127A
Authority
GB
United Kingdom
Prior art keywords
valve
valve member
arm
metal
thermo
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.)
Granted
Application number
GB7903679A
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GB2042127B (en
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.)
General Motors Ltd
Original Assignee
General Motors 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 General Motors Ltd filed Critical General Motors Ltd
Priority to GB7903679A priority Critical patent/GB2042127B/en
Publication of GB2042127A publication Critical patent/GB2042127A/en
Application granted granted Critical
Publication of GB2042127B publication Critical patent/GB2042127B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
    • F02M31/04—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture
    • F02M31/06—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating combustion-air or fuel-air mixture by hot gases, e.g. by mixing cold and hot air
    • F02M31/07—Temperature-responsive control, e.g. using thermostatically-controlled valves
    • 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
    • G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
    • G05D23/138—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for gases
    • 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

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

Abstract

A thermo-responsive valve, suitable for use in an internal combustion engine air cleaner, has a valve member 2 mounted on one end of a bimetal arm 1, a resilient coupling being interposed between the valve member and the arm to damp vibrations induced therein by engine vibration or air currents. <IMAGE>

Description

SPECIFICATION Thermo responsive valves This invention relates to thermo-responsive valves and in particlar to thermo-responsive valves for air cleaners, for example, in which a valve member is mounted on one end of a bi-metal strip or arm and is movable towards or away from a valve seat in response to flexure of the arm induced by changes in temperature. A valve of this kind is disclosed in United States Patent No: 2,289,635 and British Patents 1,248,741 and 1,363,668.
Such valves have been proposed for use in internal combustion engine air cleaners in order to control the admixture of warm and cold air from separate air inlets, the valve being located so as to move towards one and away from the other inlet in response to changes in temperature sensed by the bi-metal arm downstream of the inlets, However, an air cleaner with such a thermo-responsive valve device tends to create objectionable noise in operation, as the effect of the separate air-flows, and engine vibrations, give rise to a vibrational resonance within engine firing frequencies of 10-200 Hz.
The resulting noise can be heard in the vehicle in which the engine is mounted; also, the vibration may result in undue wear of the valve seal which may be either on the valve member on the end of the bi-metal arm, or on the air inlet ports.
In such a thermo-responsive valve, according to the present invention, a flexible coupling is interposed between the valve member and the end of the bi-metal arm which carries it; such coupling may be a member of elastomeric material or a resilient metal coupling between the valve member and bi-metal arm.
Preferred embodiments of the invention are hereinafter described with reference to the accompanying drawings in which: Figure 1 is a perspective view of the end of a bi-metal arm with a valve member mounted thereon with a flexible coupling; Figure 2 is an end elevation of the flexible coupling employed in the embodiment according to Figure 1.
Figure 3 is a side elevation of a second embodiment of a bi-metal blade and valve member with a coupling according to the invention; Figure 4 is a perspective view of the coupling employed in the embodiment according to Figure 3; Figure 5 is a third embodiment of a bi-metal arm and valve assembly according to the invention; Figure 6 is a perspective view of the coupling employed in the embodiment according to Figure 5; and Figure 7 is a sectional elevation of a portion of an air cleaner with the bi-metal arm and valve member assembly of Figures 1 and 2 mounted therein.
In the bi-metal arm and valve member assembly shown in Figure 1 a bi-metal arm 1 has mounted on one end thereof a valve member 2 comprising a metal blade 3 with an end portion, of circular form, td either side of which are secured pads 4 of rubber, foam plastics or like material adapted to form a seal when engaged with a valve port, for example, in the air inlet tube of an internal combustion engine air cleaner.
The blade 3 is secured to the end of the bi-metal arm 1 by means of a pad of rubber 5 which has extending from either side thereof pairs of tapered bosses 6 (Figure 2) spaced from the pad 5 by integral short necks 7, the bosses 6 being adapted to be pulled through corresponding openings in the end of the bi-metal arm 1 and the end of the blade 3, the resilience of the necks 7 which are stretched after such insertion, retaining the blade 3 in engagement with the end of the bi-metal arm 1.
In use, the resiliently flexible connection provided by the elastomeric coupling 5 between the valve member blade 3 and the bi-metal arm 1 effectiveiy damps vibrations induced in the arm and valve member assembly by engine vibrations and the effect of the two streams of air acting on the valve member 2 and thus prevents the generation of noise by the arm and valve member assembly.
The construction shown in Figures 3 and 4 has a flexible coupling comprising a block 10 of rubber or like elastomeric material of substantially greater width and length than depth, and with a pair of openings 11 extending therethrough from end to end thereof to receive the ends of the bi-metal arm 1 and the valve member blade 3 respectively. The ends of the arm and blade may be secured in the openings 11 in the block 10 by adhesive.
In the embodiment shown in Figure5 and 6 the valve member blade 3 is attached to the end of the bi-metal arm 1 by means of a spring steel coupling 20 which, as shown in Figure 5, is formed of a strip of spring steel with slits made therein to form strips 21 bowed outwardly from opposite sides thereof.
Figure 7 shows the bi-metal arm and valve member assembly 1,2 mounted in the air intake conduit 12 of an internal combustion engine air cleaner 14 having a cold air inlet 15 and a warm air inlet 16, the admixture of warm and cold air being controlled by movement of the arm 1 in response to temperature changes to move the valve member 2,4 towards one and away from the other of the inlets 15, 16.
1. A thermo-responsive valve in which a valve is mounted on one end of a bi-metal strip the other end of which is fixed on a support, said valve member being movable towards or away from a valve seat in response to flexure of the arm induced by changes in temperature, and in which a flexure coupling is interposed betwen the valve member and the end of the bi-metal strip which carries it.
2. A thermo-responsive valve according to claim 1, arranged in an air intake conduit of an internal combustion engine air cleaner so as to be movable towards and away from one and the other of two inlets respectively for heated and unheated air and maintain a substantially constant temperature of the air downstream of said inlets.
3. A thermo-responsive valve according to claim 1, or 2, in which said coupling is a pair of elastomeric material sandwiched between said valve member and said one end of said bi-metal strip.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Thermo responsive valves This invention relates to thermo-responsive valves and in particlar to thermo-responsive valves for air cleaners, for example, in which a valve member is mounted on one end of a bi-metal strip or arm and is movable towards or away from a valve seat in response to flexure of the arm induced by changes in temperature. A valve of this kind is disclosed in United States Patent No: 2,289,635 and British Patents 1,248,741 and 1,363,668. Such valves have been proposed for use in internal combustion engine air cleaners in order to control the admixture of warm and cold air from separate air inlets, the valve being located so as to move towards one and away from the other inlet in response to changes in temperature sensed by the bi-metal arm downstream of the inlets, However, an air cleaner with such a thermo-responsive valve device tends to create objectionable noise in operation, as the effect of the separate air-flows, and engine vibrations, give rise to a vibrational resonance within engine firing frequencies of 10-200 Hz. The resulting noise can be heard in the vehicle in which the engine is mounted; also, the vibration may result in undue wear of the valve seal which may be either on the valve member on the end of the bi-metal arm, or on the air inlet ports. In such a thermo-responsive valve, according to the present invention, a flexible coupling is interposed between the valve member and the end of the bi-metal arm which carries it; such coupling may be a member of elastomeric material or a resilient metal coupling between the valve member and bi-metal arm. Preferred embodiments of the invention are hereinafter described with reference to the accompanying drawings in which: Figure 1 is a perspective view of the end of a bi-metal arm with a valve member mounted thereon with a flexible coupling; Figure 2 is an end elevation of the flexible coupling employed in the embodiment according to Figure 1. Figure 3 is a side elevation of a second embodiment of a bi-metal blade and valve member with a coupling according to the invention; Figure 4 is a perspective view of the coupling employed in the embodiment according to Figure 3; Figure 5 is a third embodiment of a bi-metal arm and valve assembly according to the invention; Figure 6 is a perspective view of the coupling employed in the embodiment according to Figure 5; and Figure 7 is a sectional elevation of a portion of an air cleaner with the bi-metal arm and valve member assembly of Figures 1 and 2 mounted therein. In the bi-metal arm and valve member assembly shown in Figure 1 a bi-metal arm 1 has mounted on one end thereof a valve member 2 comprising a metal blade 3 with an end portion, of circular form, td either side of which are secured pads 4 of rubber, foam plastics or like material adapted to form a seal when engaged with a valve port, for example, in the air inlet tube of an internal combustion engine air cleaner. The blade 3 is secured to the end of the bi-metal arm 1 by means of a pad of rubber 5 which has extending from either side thereof pairs of tapered bosses 6 (Figure 2) spaced from the pad 5 by integral short necks 7, the bosses 6 being adapted to be pulled through corresponding openings in the end of the bi-metal arm 1 and the end of the blade 3, the resilience of the necks 7 which are stretched after such insertion, retaining the blade 3 in engagement with the end of the bi-metal arm 1. In use, the resiliently flexible connection provided by the elastomeric coupling 5 between the valve member blade 3 and the bi-metal arm 1 effectiveiy damps vibrations induced in the arm and valve member assembly by engine vibrations and the effect of the two streams of air acting on the valve member 2 and thus prevents the generation of noise by the arm and valve member assembly. The construction shown in Figures 3 and 4 has a flexible coupling comprising a block 10 of rubber or like elastomeric material of substantially greater width and length than depth, and with a pair of openings 11 extending therethrough from end to end thereof to receive the ends of the bi-metal arm 1 and the valve member blade 3 respectively. The ends of the arm and blade may be secured in the openings 11 in the block 10 by adhesive. In the embodiment shown in Figure5 and 6 the valve member blade 3 is attached to the end of the bi-metal arm 1 by means of a spring steel coupling 20 which, as shown in Figure 5, is formed of a strip of spring steel with slits made therein to form strips 21 bowed outwardly from opposite sides thereof. Figure 7 shows the bi-metal arm and valve member assembly 1,2 mounted in the air intake conduit 12 of an internal combustion engine air cleaner 14 having a cold air inlet 15 and a warm air inlet 16, the admixture of warm and cold air being controlled by movement of the arm 1 in response to temperature changes to move the valve member 2,4 towards one and away from the other of the inlets 15, 16. CLAIMS
1. A thermo-responsive valve in which a valve is mounted on one end of a bi-metal strip the other end of which is fixed on a support, said valve member being movable towards or away from a valve seat in response to flexure of the arm induced by changes in temperature, and in which a flexure coupling is interposed betwen the valve member and the end of the bi-metal strip which carries it.
2. A thermo-responsive valve according to claim 1, arranged in an air intake conduit of an internal combustion engine air cleaner so as to be movable towards and away from one and the other of two inlets respectively for heated and unheated air and maintain a substantially constant temperature of the air downstream of said inlets.
3. A thermo-responsive valve according to claim 1, or 2, in which said coupling is a pair of elastomeric material sandwiched between said valve member and said one end of said bi-metal strip.
4. A thermo-responsive valve according to claim 1 or 2, in which said coupling is a flexible metal member the opposite ends of which are respectively secured to said valve member and said one end of said bi-metal strip.
5. A thermo-responsive valve, substantially as hereinbefore described with reference to and as shown in Figures 1, 2 and 7 of the accompanying drawings.
6. Athermo-responsive valve, substantially as hereinbefore described with reference to and as shown in Figures 3 and 4 of the accompanying drawings.
7. A thermo-responsive valve, substantially as hereinbefore described with reference to and as shown in Figures 5 and 6 of the accompanying drawings.
8. An internal combustion engine air cleaner having a thermo-responsive valve according to any of claims 1 to 7 arranged in an intake conduit of the cleaner so that said valve member is movable towards one and away from the other of two valve seats respectively on the end of an inlet for heated air and an inlet for unheated air.
GB7903679A 1979-02-02 1979-02-02 Thermo-responsive valves Expired GB2042127B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7903679A GB2042127B (en) 1979-02-02 1979-02-02 Thermo-responsive valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7903679A GB2042127B (en) 1979-02-02 1979-02-02 Thermo-responsive valves

Publications (2)

Publication Number Publication Date
GB2042127A true GB2042127A (en) 1980-09-17
GB2042127B GB2042127B (en) 1983-04-07

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Family Applications (1)

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GB7903679A Expired GB2042127B (en) 1979-02-02 1979-02-02 Thermo-responsive valves

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2565632A1 (en) * 1984-06-12 1985-12-13 Volvo Ab VALVE FOR DISTRIBUTING PREHEATED AIR AND NON-PREHEATED AIR IN AN INTERNAL COMBUSTION ENGINE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2565632A1 (en) * 1984-06-12 1985-12-13 Volvo Ab VALVE FOR DISTRIBUTING PREHEATED AIR AND NON-PREHEATED AIR IN AN INTERNAL COMBUSTION ENGINE

Also Published As

Publication number Publication date
GB2042127B (en) 1983-04-07

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee