US3797803A - Control valve assembly for a gas passageway - Google Patents

Control valve assembly for a gas passageway Download PDF

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Publication number
US3797803A
US3797803A US00252577A US3797803DA US3797803A US 3797803 A US3797803 A US 3797803A US 00252577 A US00252577 A US 00252577A US 3797803D A US3797803D A US 3797803DA US 3797803 A US3797803 A US 3797803A
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US
United States
Prior art keywords
diaphragm
valve body
exhausts
passageway
diaphragm chamber
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
Application number
US00252577A
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English (en)
Inventor
K Goto
H Nohira
K Mizuno
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.)
Toyota Motor Corp
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Toyota Motor Corp
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Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
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Publication of US3797803A publication Critical patent/US3797803A/en
Anticipated expiration legal-status Critical
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    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
    • F16K31/1268—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like with a plurality of the diaphragms
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/58—Constructional details of the actuator; Mounting thereof
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S137/00—Fluid handling
    • Y10S137/907—Vacuum-actuated valves

Definitions

  • ABSTRACT A control valve assembly for a passageway for gases.
  • the device comprises a valve body adapted to open and close communication between a gas inlet duct and a gas outlet duct.
  • a diaphragm having the valve body attached to a middle portion thereof for resiliently urging the valve body normally to move into engagement with an opening of the gas inlet duct to close the same, compensation apparatus provided in one portion of a diaphragm chamber in which the valve body is disposed for eliminating or minimizing the influence of the pressure of gases on a surface of the diaphragm on which the valve body is mounted, and apparatus for permitting the other portion of the diaphragm chamber which is disposed opposite to the first mentioned diaphragm chamber portion with respect to the diaphragm to communicate with a negative pressure source.
  • the force of resilience adapted to urge the valve body into engagement'with the opening of the gas inlet duct to close the same is set at the same level as the force of negative diaphragm.
  • This invention relates to a control valve assembly provided in a passageway for gases and adapted automatically to open andclose the passageway irrespective of the pressure of gases passing therethrough when the negative pressure at which the control valve assembly is set for operation exceeds a predetermined level. More particularly, the invention deals with a control valve assembly having particular utility for use in a passageway for the exhausts of an internal combustion engine which are high in temperature and highly corrosive and which tend to contain minute particles of carbon, lead compounds and other materials which tend to adhere to the passageway.
  • This invention has as its object the provision ofa cont'rol valve assembly, simple in construction. compact in size and light in weight. which permits control of exhaust emission ofa motor vehicle engine to be effected smoothly and positively in the manner described above without being affected by external conditions, such for example as the pressure of exhausts.
  • FIG. 1 is a vertical sectional view of the control valve assembly comprising one embodiment of this invention.
  • FIG. 2 is a vertical sectional view of the control valve assembly comprising another embodiment of the invention.
  • control valve assembly is shown as comprising a valve body 4 of the semi-spherical shape mounted in an inlet duct 1, for exhausts from the engine or other gases, which is connected to a valve casing 3 to which an outlet duct 2 for the exhausts is also connected.
  • a lower cover 6 Provided over an upper opening of casing 3 is a lower cover 6 on which an upper cover is mounted with a diaphragm 7 being interposed between the two covers.
  • Valve body 4 is firmly secured to a support plate 8 attached to a middle portion of diaphragm 7.
  • a flexible tube 9 made of metal is arranged between an outer periphery of support plate 8 and a lower portion of lower cover 6 for mounting therein valve body 4 and inlet duct 1.
  • An upper diaphragm chamber portion 10 of a diaphragm chamber defined by diaphragm 7 and upper cover 5 is maintained in communication, through a negative pressure inlet port 11 formed in upper cover 5, with a mixing passage in the engine or other negative pressure source (not shown).
  • a spring 13 is mounted between an upper wall 12 of upper diaphragm chamber portion 10 and an upper surface of support plate 8 normally to urge valve body 4 by its biasing force to move downwardly into engagement with an upper end of inlet duct 1 to close the same.
  • the biasing force of Spring 13 normally urging valve body 4 to move into engagement with the upper opening of exhausts inlet duct 1 is set at the same level as the negative pressure which actuates diaphragm 7.
  • metallic flexible cylinder 9 serves as a sort of compensation means for minimizing the influence of the stream of exhausts exerted on diaphragm 7.
  • FlG. 2 illustrates another embodiment of the invention in a vertical sectional view.
  • a valve body 20 is juxtaposed to an opening 18 of an inlet duct 16 for exhausts from the engine and an opening 19 of an outlet duct 17 for the exhausts simultaneously to open and close the two ducts.
  • Attached to an upper portion of a casing 30 in which ducts 16 and 17 are formed is a first lower cover 22 to which is firmly secured a firstupper cover 21 with a first diaphragm 23 being interposed between the two covers.
  • a first support plate 24 Attached to a middle portion of diaphragm 23 is a first support plate 24 to which a stem 25 supporting a valve body 20 is firmly secured at one end thereof.
  • a first diaphragm chamber 26 defined by first upper cover 21 and first diaphragm 23 is maintained in communication with a mixing passage in the engine or other negative pressure source (not shown) through a negative pressure inlet duct 27 formed in first upper cover 21.
  • a spring 28 is mounted between an upper wall of first upper diaphragm chamber 26 and an upper surface of first support plate 24 so as to normally urge valve body to move downwardly into engagement with the openings 18 and 19 of exhaust inlet and outlet ducts l6 and 17 respectively.
  • a second diaphragm chamber 29 defined by first diaphragm 23 and first lower cover 22 is maintained in communication with exhausts outlet duct 17 through a first port 31 in casing 30.
  • the stem 25 supporting valve body 20 extends through casing and the other end thereof reaches a position which is symmetrical with the position of the mechanism including first diaphragm 23 with respect to the axes of exhausts inlet and outlet ducts 16 and 17.
  • the mechanism including stem 25, third port 39 and second diaphragm 34 constitutes a sort of compensation means for minimizing the influence of the stream of exhausts exerted on first diaphragm 23.
  • first diaphragm 23 will be actuated and displaced to move upwardly the valve body 20supported bystem 25, thereby permitting communication to be established between the openings 18 and 19 of exhausts inlet and outlet ducts l6 and 17 respectively.
  • the pressure of the stream of exhausts is applied to first diaphragm 23 in second diaphragm chamber 29.
  • the pressure is introduced through a third port 39 into fourth diaphragm chamber 38 associated with second diaphragm '34 simultaneously to be applied to second diaphragm 34. Since the two diaphragm mechanisms are disposed symmetrically with each other with respect to the axes of inlet and outlet ducts l6 and 17, the actions of the stream of exhausts exerted on the two diaphragms 23 and 34 cancel each other out, so that little or no influence of the stream of exhausts is exerted on first diaphragm 23. Since third diaphragm chamber 36 is maintained in communication with atmosphere through second port 37, no other influence is exerted on first diaphragm 23 than the influence of the negative pressure introduced into first diaphragm chamber 26 through negative pressure inlet duct 27.
  • control valve assembly has no sliding parts. Because of this, the invention offers the advantage of having particular utility for use in a passageway for exhausts from an internal combustion engine which are high in temperature and highly corrosive and which contain minute particles of carbon, lead compounds and other materials which tend to adhere to the passageway, because the invention is free from mechanical failures due to corrosion of sliding parts or adherence of the minute particles of these materials thereto. The danger of leakage of exhausts is eliminated by virtue of the provision of the diaphragm mechanism for sealing the valve.
  • control valve assembly is relatively simple so that its size is compact and its weight is light. Thus, the control valve assembly can be mounted in any limited space.
  • control valve assembly lends itself to use not only as a control valve for any exhaust emission control devices for motor vehicle engines but also as a control valve for passageways for exhausts, of any type, because it has particular utility for use in the passageway of exhausts which are high in temperature and highly corrosive and which contain minute particles of materials tending to adhere to the passagewayv What is claimed is:
  • a control valve assembly for exhausts mounted in a passageway for exhausts for controlling a stream of exhausts moving through said passageway comprising a valve body disposed in a horizontal plane in which an Opening of an up stream portion of said passageway for exhausts and an opening of a downstream portion thereof are disposed, said valve body being adapted to move vertically relative to said horizontal plane to open and close communication between the two openings, a plurality of diaphragm chambers each having a diaphragm of the same area of a pressure receiving surface, said diaphragms being disposed opposite each other with respect to said horizontal plane, a spring mounted in one portion of one of said diaphragm chambers for urging said valve body by its biasing force to move into engagement with said openings of said upstream and downstream portions of said passageway for exhausts to interrupt the movement of exhausts through said passageway, said one portion of said one diaphragm chamber in which said spring is mounted being connected to a negative pressure source, the other portion of said one diaphragm chamber and
  • a control valve assembly for a passageway for gases comprising:
  • first diaphragm mechanism provided in an upper portion of said casing said first diaphragm mechanism including a first upper cover (21), a first lower cover (22), a first diaphragm (23) and a first support plate (24) provided in a central portion of said first diaphragm (23), said first support plate (24) being secured to one end of said stem first diaphragm chamber (26) defined by said first upper cover (21) and said first diaphragm (23); negative pressure inlet duct (27) provided so as to communicate said first upper cover (21) to a negative pressure source;
  • a second diaphragm chamber (29) defined by said first lower cover (22) and said first diaphragm (23), said casing (30) having a first port (31) to provide communication between said second diaphragm chamber (29) and said gas outlet duct a second diaphragm mechanism provided in a lower a third diaphragm chamber (36) defined by said second lower cover (32) and said second diaphragm (34), said second lower cover (32) having a second port (37) communicating with atmosphere; and

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid-Driven Valves (AREA)
US00252577A 1971-05-15 1972-05-12 Control valve assembly for a gas passageway Expired - Lifetime US3797803A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971039028U JPS4734522U (enrdf_load_stackoverflow) 1971-05-15 1971-05-15

Publications (1)

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US3797803A true US3797803A (en) 1974-03-19

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US00252577A Expired - Lifetime US3797803A (en) 1971-05-15 1972-05-12 Control valve assembly for a gas passageway

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JP (1) JPS4734522U (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885538A (en) * 1973-12-03 1975-05-27 Ford Motor Co Engine air pump pressure/manifold vacuum controlled exhaust gas recirculating control system
US3928966A (en) * 1972-11-30 1975-12-30 Toyota Motor Co Ltd Flow control valve for exhaust gas recirculation system
US4054133A (en) * 1976-03-29 1977-10-18 The Bendix Corporation Control for a demand cannula
FR2402820A1 (fr) * 1977-09-07 1979-04-06 Fram Corp Valve de commande d'air
US4651778A (en) * 1984-08-29 1987-03-24 Alfred Pernat Pressure regulating system
US4903721A (en) * 1985-04-03 1990-02-27 Outboard Marine Corporation Fuel pressure regulator
US5217043A (en) * 1990-04-19 1993-06-08 Milic Novakovic Control valve
US20050087244A1 (en) * 2003-10-27 2005-04-28 Francois Delaney Proportional valve
US7013916B1 (en) 1997-11-14 2006-03-21 Air Products And Chemicals, Inc. Sub-atmospheric gas delivery method and apparatus
US7150299B2 (en) 2003-09-12 2006-12-19 Air Products And Chemicals, Inc. Assembly and method for containing, receiving and storing fluids and for dispensing gas from a fluid control and gas delivery assembly having an integrated fluid flow restrictor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS531903B2 (enrdf_load_stackoverflow) * 1974-02-05 1978-01-23
JPS6120683U (ja) * 1984-07-02 1986-02-06 新日軽株式会社 換気小窓

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169683A (en) * 1938-01-03 1939-08-15 Ex Lab Inc Generating mixed fluid heating medium
GB919397A (en) * 1961-03-15 1963-02-27 Filton Ltd Improvements in or relating to fluid flow control valves
US3473521A (en) * 1967-09-13 1969-10-21 George V Mustain Crankcase ventilation valve and fuel economizer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169683A (en) * 1938-01-03 1939-08-15 Ex Lab Inc Generating mixed fluid heating medium
GB919397A (en) * 1961-03-15 1963-02-27 Filton Ltd Improvements in or relating to fluid flow control valves
US3473521A (en) * 1967-09-13 1969-10-21 George V Mustain Crankcase ventilation valve and fuel economizer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928966A (en) * 1972-11-30 1975-12-30 Toyota Motor Co Ltd Flow control valve for exhaust gas recirculation system
US3885538A (en) * 1973-12-03 1975-05-27 Ford Motor Co Engine air pump pressure/manifold vacuum controlled exhaust gas recirculating control system
US4054133A (en) * 1976-03-29 1977-10-18 The Bendix Corporation Control for a demand cannula
FR2402820A1 (fr) * 1977-09-07 1979-04-06 Fram Corp Valve de commande d'air
US4651778A (en) * 1984-08-29 1987-03-24 Alfred Pernat Pressure regulating system
US4903721A (en) * 1985-04-03 1990-02-27 Outboard Marine Corporation Fuel pressure regulator
US5217043A (en) * 1990-04-19 1993-06-08 Milic Novakovic Control valve
US7013916B1 (en) 1997-11-14 2006-03-21 Air Products And Chemicals, Inc. Sub-atmospheric gas delivery method and apparatus
US7150299B2 (en) 2003-09-12 2006-12-19 Air Products And Chemicals, Inc. Assembly and method for containing, receiving and storing fluids and for dispensing gas from a fluid control and gas delivery assembly having an integrated fluid flow restrictor
US20050087244A1 (en) * 2003-10-27 2005-04-28 Francois Delaney Proportional valve
US6988513B2 (en) 2003-10-27 2006-01-24 Delaney Machinerie Inc. Proportional valve

Also Published As

Publication number Publication date
JPS4734522U (enrdf_load_stackoverflow) 1972-12-18

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