US3675633A - Air-pollution preventive system for motor vehicles - Google Patents

Air-pollution preventive system for motor vehicles Download PDF

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Publication number
US3675633A
US3675633A US2572A US3675633DA US3675633A US 3675633 A US3675633 A US 3675633A US 2572 A US2572 A US 2572A US 3675633D A US3675633D A US 3675633DA US 3675633 A US3675633 A US 3675633A
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United States
Prior art keywords
valve
cam
intake manifold
engine
vacuum
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Expired - Lifetime
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US2572A
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English (en)
Inventor
Yasuo Nakajima
Yoshimasa Hayashi
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
    • F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
    • F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
    • 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
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • 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
    • F02M26/64—Systems for actuating EGR valves the EGR valve being operated together with an intake air throttle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0276—Throttle and EGR-valve operated together

Definitions

  • ABSTRACT (21 1 Appl An air-pollution preventive system for use with motor vehicle internal combustion engines (or effectively reducing the con- [30] Foreign A li ation Pri it D m centration of nitrogen oxides in the exhaust gases emitted from the engines during the city road driving of the motor 1969 Japan "44/3497 vehicle comprises means for recirculating the exhaust gases March 22, Japan f the exhaust manifold into the intake manifo'd y when the vacuum in the intake manifold is lower than a predeter ⁇ g g mined lever concurrently with the throttle valve of the carburetor being within a predetermined range of open positions.
  • the means for recirculating the exhaust gases comprises a recirculating passage, a valve for opening and closing the [56] Rdermm cued passage, and a double-action cam which is both axially movable in res nse to intake manifold vacuum conditions and an- UNITED STATES PATENTS 9 gularly displaced in response to movement of the throttle 2.419.747 4/1947 Wassman.urban l23/ll9 A valve to open the va
  • This invention relates to an air-pollution preventive system for a motor vehicle and, more particularly, to a system for reducing the concentration of nitrogen oxides contained in the exhaust gases emitted from the internal combustion engine of the motor vehicle.
  • the system proposed by this invention is characterized in that the exhaust gases are recirculated into the intake manifold only when the engine is driven under predetermined conditions represented by the level of the vacuum in the intake manifold and the angular position of the throttle valve of the carburetor.
  • the invention was thus completed under the recognition that the drawbacks which result from the continuous recirculation of the exhaust gases can be efiectively eliminated by selectively recirculating the exhaust gases only when the engine is driven under predetermined conditions in which the motor vehicle accelerates or climbs up a hill in urban areas.
  • Such conditions of the engine providing the acceleration or hill-climbing of the motor vehicle are represented, as preferable according to the invention, by two particular factors-the angular position of the throttle valve in the carburetor and the vacuum in the intake manifold of the engine.
  • a primary object of the invention is therefore to provide a system for reducing the concentration of toxic pollutants emitted from the engine when the motor vehicle is running in urban areas.
  • Another primary object of the invention is to provide a system which is adapted to reduce the concentration of nitrogen oxides to be admitted to the open air without detriment to the operation stability and power output of the engine and without contamination of the components and parts of the engine.
  • Still another primary object of the invention is to provide a system which is constructed and arranged to have the exhaust gases recirculated into the intake manifold only when the engine is driven under predetermined conditions in which the motor vehicle accelerates or climbs up a hill.
  • Still another primary object of the invention is to provide a system whereby the engine exhaust gases containing nitrogen oxides are recirculated into the intake manifold only when the throttle valve in the carburetor is held in predetermined angular positions and concurrently the vacuum in the intake manifold of the engine is maintained at predetermined levels.
  • FIG. I is a graphical representation of a typical example of the relationships between the vehicle speed of a motor vehicle running on city-roads and the concentration of nitrogen oxides in the then emitted exhaust gases when the system according to the invention is used and not used;
  • FIG. 2 is a sectional view showing a preferred embodiment of the air-pollution preventive system of the invention as combined with a usual automotive carburetor;
  • FIG. 3 is a section on line ll ofFlG. 2;
  • FIG. 4 is a section on line ll -ll of FIG. 2;
  • FIG. 5 is a graphical representation of a region of the conditions in which the engine exhaust gases are to be recirculated by means of the system illustrated in F [65. 2 to 4.
  • the invention proposes to have the ranges a-b and c-d of the driving conditions of the motor vehicle represented by the angular position of the throttle valve in the carburetor and the vacuum level in the intake manifold of the engine.
  • the air-pollution preventive system of this invention is constructed in such a manner that the engine exhaust gases are recirculated into the intake manifold of the engine only when the throttle valve of the carburetor assumes predetermined angular positions and simultaneously the intake manifold vacuum is lower than a predetermined level.
  • the system according to the invention is used in combination with a usual carburetor which is generally indicated by numeral 1.
  • the carburetor I has, as customary, a throttle valve 2 mounted on a rotary shaft 3, and communicates with the engine (not shown) through an intake manifold 4.
  • the air-pollution preventive system of the invention essentially comprises an exhaust recirculation control valve assembly N).
  • the valve assembly 10 has a casing ll which communicates on one side with the exhaust manifold (not shown) through an exhaust recirculation conduit 12 and on the other with the carburetor l downstream of the throttle valve 2 through an exhaust recirculation nozzle 13. If preferred, the nozzle 13 may be opened into the intake manifold 4, though not so illustrated.
  • the valve assembly 10 has provided in its casing ll a valve head 14 which is positioned relative to a valve seat 15 formed integrally with the casing 11 in such a manner that the nozzle 13 is isolated from the conduit 12 when the valve head 14 is seated on the valve seat 15.
  • the valve head 14 is integrally connected with a valve stem M which slidably extends through a valve guide 17 formed integrally with the casing ll.
  • the valve stem I6 is normally held in its retracted position by the action of a positioning means comprising a spring 18 which is fast at one end on the casing 11 and at the other on an end plate 19 which is fixed relative to the valve stem 16.
  • valve stem 16 thus being normally kept retracted, the valve head 14 is normally held in a position to isolate the noule 13 from the conduit 12 and accordingly the intake manifold 4 from the exhaust manifold (not shown).
  • the valve stem 16 protrudes through the end plate 19 and abuts at its leading end against a double-action cam 20.
  • the double-action cam 20 and its associated components comprise another positioning means and the cam is mounted fixedly on a cam shaft 21 which is not only pivotal but axially movable for a limited distance.
  • the cam 20 has fonned partially on its periphery a protruded abutment 20a and when the cam 20 is rotated sufficiently angularly displaced or pivoted, the abutment 20a abuts against the leading end of the valve stem 16 which consequently is moved in a direction opposite to the cam 20 to unseat the valve head 14 from the valve seat 15.
  • the cam 20 is connected through a connecting rod 22 with an arm 23 which, in turn, is connected with the rotary shaft 3 of the throttle valve 2 in a manner to pivot as the throttle valve 2 is angularly displaced, as seen in FIGS. 2 and 3.
  • the cam 20 is angularly displaced about the axis of the cam shaft 21 as the throttle valve 2 is pivoted and, when the abutment 20a abuts against the valve stem 16, then the valve head 14 leaves the valve seat 15 thereby to permit the nozzle 13 to communicate with the conduit 12, as previously mentioned.
  • the displacement of the valve head 14 from the valve seat I is determined by varying the length of the valve stem 16 and/or the relative position and/or size of the abutment 20a and/or cam 20 per se, so that the valve assembly can be opened only when the throttle valve 2 is held in predetermined range of angular positions, for example, between and 45.
  • the double-action cam 20 when seen in end view as shown in FIG. 4, has formed on its periphery a radially reduced section b which merges with the abutment 20a through a conical section 20c.
  • the cam shaft 21 which is integrally connected with the thus shaped cam 20 is axially slidably inserted into a hollow cylinder 24 which is fixed relative to or connected integrally with the casing 11.
  • a return spring 26 In a chamber 25 defined by the inside walls of the cam shaft 2] and cylinder 24 is mounted a return spring 26 whereby the cam shaft 21 is forced or biased away from the end wall 25a of the cylinder so that the cam 20 is normally held in the farthest position possible from the cylinder 24 as shown.
  • the chamber 25 communicates with the intake manifold 4 through a vacuum conduit 27.
  • the double-action cam 20 is positioned in such a manner that, when it is held in the position farthest from the cylinder 24, the abutment 20a thereof is in line with the leading end of the valve stem 16 as shown and when in the position nearest the cylinder, the radially reduced section 20b is in line with the valve stem l6 as indicated by the broken line in FIG. 4.
  • the axial movement of the cam 20 is determined by selecting the loading of the spring 26 so that the valve stem 16 and accordingly the valve head 14 can be moved against the action of the spring 26 only when the vacuum drawn from the intake manifold 4 through the conduit 27 is lower than a predetermined level, for example, 350 mm of Hg.
  • An orifice 13a may preferably be provided in the nozzle 13 for obtaining a constant flow rate.
  • the angular position of the throttle valve 2 and the vacuum level in the intake manifold 4 remain outside those ranges in which the abutment 20a of the double-action cam 20 is not permitted to contact the valve stem 16.
  • the cam 20 is held, when seen as shown in FIG. 4, in a position indicated by a broken line against the action of the return spring 26 because of a high vacuum in the intake manifold and, when seen in plan view as in FIG. 2, in the illustrated position in which the abutment 20a is not in contact with the valve stem l6.
  • the cam 20 is held in a position where the reduced section 20!) is in line with the valve stem 16 and can not act upon the valve stem 16 so that the valve head 14 is seated on the valve seat 15 to shut off the flow of exhaust gases in the exhaust recirculation conduit 12.
  • the intake manifold vacuum drops under the aforesaid predetermined level, for example, -350 mm of Hg and the angular position of the throttle valve 2 falls within the aforesaid predetermined range, for example, anywhere between 15 and 45.
  • the spring 26 overpowers the vacuum drawn from the intake manifold 2 to cause the cam 20 to axially move into a position where the abutment 20a is in alignment with the valve stem 16 and at the same time the cam 20 is rotated angularly displaced into a position where the abutment 200 contacts the leading end of the valve stem 16.
  • the stem 16 is depressed in a direction opposite to the cam 20 against the action of the spring 18 so that the valve head 14 is unseated from the valve seat.
  • the engine exhaust gases are now pennitted to recirculate into the intake manifold 2 through the conduit 12, valve assembly 10 and nozzle 13,
  • the combustion temperature in the engine is lowered and the concentration of nitrogen oxides emitted to the open air is reduced from the levels represented by the dotted curves u'-b' and cd to the solid curve a'b'c'd' in FIG. I.
  • the range in which the engine exhaust gases are recircu lated into the intake manifold is illustrated in FIG. 5, wherein the valve assembly 10 is assumed to open when the throttle valve is opened at an angle from 15 to 45 and the intake manifold vacuum is lower than 350 mm of Hg.
  • the recirculation range is indicated by the hatched area.
  • exhaust recirculation control valve assembly may be constructed to recirculate the exhaust gases only when the angular position of the throttle valve and the intake manifold vacuum are in predetermined ranges without departing from the scope and spirit of the invention as set forth in the appended claims.
  • An air pollution preventive system for a motor vehicle having an internal combustion engine with a carburetor having a throttle valve comprising: a recirculation passage com municating at one end with an exhaust manifold of said engine and at the other with an intake manifold of said engine; a recirculation control valve mounted in said recirculation passage for opening and closing same comprising a casing communicating on one side with the exhaust manifold and on the other side with the intake manifold, a valve seat integral with said casing, a valve head movably mounted in said casing to seat and unseat on said valve seat, a valve stem connected integrally with said valve head with its leading end extending outwardly through said casing, and a compression spring biasing said valve stem to a position in which said valve head is seated on said valve seat; cam means pivotal in response to angular movement of said throttle valve of said carburetor for actuating said control valve to open said recirculation passage when said throttle valveis in a predetermined range of angular
  • An air pollution preventive system for a motor vehicle having an internal combustion engine with a carburetor having a throttle valve comprising: a recirculation passage communicating at one end with an exhaust manifold of said engine and at the other with an intake manifold of said engine; a recirculation control valve mounted in said recirculation passage; and double action cam means axially movable between operative and inoperative positions in response to the level of intake manifold vacuum and rotatable in response to angular movement of said throttle valve of said carburetor, said control valve being opened only when said intake manifold vacuum is below a predetermined level concurrently with said throttle valve being within a predetermined range of angular positions; whereby engine exhaust gases are recirculated through the engine to reduce the concentration of nitrogen oxides in the engine exhaust gases in accordance with varying driving conditions of said motor vehicle.
  • an air-pollution preventive system for reducing the concentration of nitrogen oxides in the engine exhaust gases in accordance with varying driving conditions of the motor vehicle comprising: means defining a recirculation passage communicating said intake manifold with said exhaust manifold; valve means disposed within said recirculation passage alternately positionable in an open position thereby opening said recirculation passage to allow engine exhaust gases from said exhaust manifold to flow into said intake manifold and in a closed position thereby closing said recirculation passage; first positioning means for positioning said valve means in said open position; and second positioning means for positioning said valve means in said closed position whenever said throttle valve is within a predetermined range of open positions concurrently with the vacuum level within said intake manifold being below a predetermined level.
  • said second positioning means comprising a cam. means mounting said cam both for axial movement into and out of an actuating position wherein same can open said valve means and for angular camming movement, linkage connecting said cam to said throttle valve to effect angular camming movement of said cam in response to angular movement of said throttle valve, and vacuum-operated means for effecting axial movement of said cam into said actuating position whenever the vacuum level within said intake manifold is below said predetermined level; whereby engine exhaust gases are recirculated during both acceleration and heavy loading of the motor vehicle at low speeds.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
US2572A 1969-01-20 1970-01-13 Air-pollution preventive system for motor vehicles Expired - Lifetime US3675633A (en)

Applications Claiming Priority (2)

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JP349769 1969-01-20
JP2128169 1969-03-22

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US3675633A true US3675633A (en) 1972-07-11

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US (1) US3675633A (xx)
DE (1) DE2002164C3 (xx)
FR (1) FR2028733A1 (xx)
GB (1) GB1262252A (xx)
SE (1) SE358932B (xx)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766896A (en) * 1972-06-14 1973-10-23 Gen Motors Corp Button valve exhaust gas recirculation system
US3807375A (en) * 1972-03-13 1974-04-30 Bosch Gmbh Robert Valve means for the recycling of waste gas in internal combustion engines
US3814070A (en) * 1972-12-26 1974-06-04 Bendix Corp Exhaust gas recirculation flow control system
US3844261A (en) * 1972-02-08 1974-10-29 Alfa Romeo Spa Device for regulating the rate of flow of recycled exhaust gases in an internal combustion engine
US3882837A (en) * 1972-03-02 1975-05-13 Nissan Motor Exhaust gas recirculation control device for internal combustion
US3916857A (en) * 1972-08-31 1975-11-04 Nippon Denso Co Means for controlling the exhaust recirculation
US3969614A (en) * 1973-12-12 1976-07-13 Ford Motor Company Method and apparatus for engine control
US3975904A (en) * 1975-01-22 1976-08-24 The United States Of America As Represented By The Secretary Of The Army Controlled exhaust gas recirculation
US3978834A (en) * 1973-10-09 1976-09-07 Regie Nationale Des Usines Renault Arrangement for controlling the recirculation of exhaust gas in internal combustion engines
JPS5221532A (en) * 1975-08-12 1977-02-18 Nissan Motor Co Ltd Exhaust gas reflux controller
US4027636A (en) * 1975-05-26 1977-06-07 Nissan Motor Co., Ltd. Flow rate control apparatus in exhaust gas recirculation system
US4194475A (en) * 1978-04-25 1980-03-25 Toyota Jidosha Kogyo Kabushiki Kaisha Internal combustion engine with an exhaust gas recirculation system
US4224912A (en) * 1978-08-02 1980-09-30 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation system with an auxiliary valve
US4347699A (en) * 1979-12-10 1982-09-07 Aisin Seiki Kabushiki Kaisha Exhaust cleaning fluid control system and vacuum control valve device for use therein
US4366670A (en) * 1979-12-05 1983-01-04 Aisin Seiki Kabushiki Kaisha Vacuum control valve for exhaust gas cleaning system
US4561408A (en) * 1984-01-23 1985-12-31 Borg-Warner Corporation Motorized flow control valve
US5072729A (en) * 1986-11-04 1991-12-17 Bird Products Corporation Ventilator exhalation valve
US5213087A (en) * 1990-11-06 1993-05-25 Firma Carl Freudenberg Device for supplying combusted gases to the combustion chamber of an internal combustion engine at a controlled rate
US5265578A (en) * 1991-04-08 1993-11-30 Firma Carl Freudenberg Device for quantitatively regulating the supplying of burned gases into the combustion chamber of an internal combustion engine
US5474062A (en) * 1987-11-04 1995-12-12 Bird Products Corporation Medical ventilator
US5494028A (en) * 1986-11-04 1996-02-27 Bird Products Corporation Medical ventilator
US5694926A (en) * 1994-10-14 1997-12-09 Bird Products Corporation Portable drag compressor powered mechanical ventilator
US6039034A (en) * 1997-09-04 2000-03-21 General Motors Corporation Exhaust gas recirculation valve
US6116223A (en) * 1997-12-12 2000-09-12 Caterpillar Inc. Cam driven exhaust gas recirculation valve assembly
US6135967A (en) * 1999-04-26 2000-10-24 Fiorenza; Anthony Joseph Respiratory ventilator with automatic flow calibration
LU90480B1 (en) * 1999-11-29 2001-05-30 Delphi Tech Inc Exhaust gas re-circulation device for an internal combustion engine
US6240919B1 (en) 1999-06-07 2001-06-05 Macdonald John J. Method for providing respiratory airway support pressure
FR2806448A1 (fr) * 2000-03-16 2001-09-21 Coutier Moulage Gen Ind Dispositif d'obturation et de regulation du debit de gaz d'echappement dans une ligne de recyclage de gaz d'echappement connectee a une ligne d'admission d'air d'un moteur a combustion interne
US20030136388A1 (en) * 2001-06-28 2003-07-24 Brosseau Michael R. Finger follower for a cam-actuated poppet valve in an engine intake manifold assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2038967C3 (de) * 1970-08-05 1975-12-18 Atox Trust Reg., Vaduz Einrichtung zur gesteuerten Rückführung von Abgasen in die Ansaugleitung einer Brennkraftmaschine
DE2529208C2 (de) * 1975-07-01 1985-07-11 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur Regelung der Menge von zur Saugseite einer Brennkraftmaschine rückgeführten Abgas
DE3334433C1 (de) * 1983-09-23 1984-11-22 Heinz 4474 Lathen Bergmann Verbrennungsmotor

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US2419747A (en) * 1944-08-24 1947-04-29 Carter Carburetor Corp Conditioner for recirculated exhaust gases
US2543194A (en) * 1949-10-31 1951-02-27 Jr Auguste Jean Paris Internal-combustion engine and method of operating same
US2722927A (en) * 1952-10-29 1955-11-08 George W Cornelius Apparatus for controlling internal combustion engine fuel mixtures
US2747560A (en) * 1952-09-04 1956-05-29 Gen Motors Corp Carbon dioxide as an anti-knock agent
US2889904A (en) * 1956-08-24 1959-06-09 Martinoli Sante Tino Apparatus for increasing efficiency of internal combustion engines
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Publication number Priority date Publication date Assignee Title
US2419747A (en) * 1944-08-24 1947-04-29 Carter Carburetor Corp Conditioner for recirculated exhaust gases
US2543194A (en) * 1949-10-31 1951-02-27 Jr Auguste Jean Paris Internal-combustion engine and method of operating same
US2747560A (en) * 1952-09-04 1956-05-29 Gen Motors Corp Carbon dioxide as an anti-knock agent
US2722927A (en) * 1952-10-29 1955-11-08 George W Cornelius Apparatus for controlling internal combustion engine fuel mixtures
US2889904A (en) * 1956-08-24 1959-06-09 Martinoli Sante Tino Apparatus for increasing efficiency of internal combustion engines
US3204621A (en) * 1964-01-16 1965-09-07 Stanley R Holliday System for combustion engine
US3368345A (en) * 1965-03-22 1968-02-13 Walker Brooks Engine for reduced exhaust smog emissions

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3844261A (en) * 1972-02-08 1974-10-29 Alfa Romeo Spa Device for regulating the rate of flow of recycled exhaust gases in an internal combustion engine
US3882837A (en) * 1972-03-02 1975-05-13 Nissan Motor Exhaust gas recirculation control device for internal combustion
US3807375A (en) * 1972-03-13 1974-04-30 Bosch Gmbh Robert Valve means for the recycling of waste gas in internal combustion engines
US3766896A (en) * 1972-06-14 1973-10-23 Gen Motors Corp Button valve exhaust gas recirculation system
US3916857A (en) * 1972-08-31 1975-11-04 Nippon Denso Co Means for controlling the exhaust recirculation
US3814070A (en) * 1972-12-26 1974-06-04 Bendix Corp Exhaust gas recirculation flow control system
US3978834A (en) * 1973-10-09 1976-09-07 Regie Nationale Des Usines Renault Arrangement for controlling the recirculation of exhaust gas in internal combustion engines
US3969614A (en) * 1973-12-12 1976-07-13 Ford Motor Company Method and apparatus for engine control
US3975904A (en) * 1975-01-22 1976-08-24 The United States Of America As Represented By The Secretary Of The Army Controlled exhaust gas recirculation
US4027636A (en) * 1975-05-26 1977-06-07 Nissan Motor Co., Ltd. Flow rate control apparatus in exhaust gas recirculation system
JPS5221532A (en) * 1975-08-12 1977-02-18 Nissan Motor Co Ltd Exhaust gas reflux controller
JPS5637424B2 (xx) * 1975-08-12 1981-08-31
US4194475A (en) * 1978-04-25 1980-03-25 Toyota Jidosha Kogyo Kabushiki Kaisha Internal combustion engine with an exhaust gas recirculation system
US4224912A (en) * 1978-08-02 1980-09-30 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation system with an auxiliary valve
US4366670A (en) * 1979-12-05 1983-01-04 Aisin Seiki Kabushiki Kaisha Vacuum control valve for exhaust gas cleaning system
US4347699A (en) * 1979-12-10 1982-09-07 Aisin Seiki Kabushiki Kaisha Exhaust cleaning fluid control system and vacuum control valve device for use therein
US4561408A (en) * 1984-01-23 1985-12-31 Borg-Warner Corporation Motorized flow control valve
US5072729A (en) * 1986-11-04 1991-12-17 Bird Products Corporation Ventilator exhalation valve
US5494028A (en) * 1986-11-04 1996-02-27 Bird Products Corporation Medical ventilator
US5474062A (en) * 1987-11-04 1995-12-12 Bird Products Corporation Medical ventilator
US5213087A (en) * 1990-11-06 1993-05-25 Firma Carl Freudenberg Device for supplying combusted gases to the combustion chamber of an internal combustion engine at a controlled rate
US5265578A (en) * 1991-04-08 1993-11-30 Firma Carl Freudenberg Device for quantitatively regulating the supplying of burned gases into the combustion chamber of an internal combustion engine
US7222623B2 (en) 1994-10-14 2007-05-29 Birds Products Corporation Portable drag compressor powered mechanical ventilator
US5868133A (en) * 1994-10-14 1999-02-09 Bird Products Corporation Portable drag compressor powered mechanical ventilator
US5881722A (en) * 1994-10-14 1999-03-16 Bird Products Corporation Portable drag compressor powered mechanical ventilator
US7849854B2 (en) 1994-10-14 2010-12-14 Bird Products Corporation Portable drag compressor powered mechanical ventilator
US6877511B2 (en) 1994-10-14 2005-04-12 Bird Products Corporation Portable drag compressor powered mechanical ventilator
US5694926A (en) * 1994-10-14 1997-12-09 Bird Products Corporation Portable drag compressor powered mechanical ventilator
US20050150494A1 (en) * 1994-10-14 2005-07-14 Devries Douglas F. Portable drag compressor powered mechanical ventilator
US6526970B2 (en) 1994-10-14 2003-03-04 Devries Douglas F. Portable drag compressor powered mechanical ventilator
US20050115564A1 (en) * 1994-10-14 2005-06-02 Devries Douglas F. Portable drag compressor powered mechanical ventilator
US20030230307A1 (en) * 1994-10-14 2003-12-18 Devries Douglas F. Portable drag compressor powered mechanical ventilator
US6039034A (en) * 1997-09-04 2000-03-21 General Motors Corporation Exhaust gas recirculation valve
US6116223A (en) * 1997-12-12 2000-09-12 Caterpillar Inc. Cam driven exhaust gas recirculation valve assembly
US6135967A (en) * 1999-04-26 2000-10-24 Fiorenza; Anthony Joseph Respiratory ventilator with automatic flow calibration
US6240919B1 (en) 1999-06-07 2001-06-05 Macdonald John J. Method for providing respiratory airway support pressure
EP1103715A1 (en) * 1999-11-29 2001-05-30 Delphi Technologies, Inc. Exhaust gas re-circulation device for an internal combustion engine
LU90480B1 (en) * 1999-11-29 2001-05-30 Delphi Tech Inc Exhaust gas re-circulation device for an internal combustion engine
FR2806448A1 (fr) * 2000-03-16 2001-09-21 Coutier Moulage Gen Ind Dispositif d'obturation et de regulation du debit de gaz d'echappement dans une ligne de recyclage de gaz d'echappement connectee a une ligne d'admission d'air d'un moteur a combustion interne
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Also Published As

Publication number Publication date
DE2002164B2 (de) 1973-04-19
GB1262252A (en) 1972-02-02
DE2002164A1 (de) 1970-07-23
SE358932B (xx) 1973-08-13
FR2028733A1 (xx) 1970-10-16
DE2002164C3 (de) 1973-10-31

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