US3882837A - Exhaust gas recirculation control device for internal combustion - Google Patents

Exhaust gas recirculation control device for internal combustion Download PDF

Info

Publication number
US3882837A
US3882837A US337198A US33719873A US3882837A US 3882837 A US3882837 A US 3882837A US 337198 A US337198 A US 337198A US 33719873 A US33719873 A US 33719873A US 3882837 A US3882837 A US 3882837A
Authority
US
United States
Prior art keywords
valve
engine
intake manifold
actuator
flow control
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
US337198A
Other languages
English (en)
Inventor
Masakazu Horie
Takao Fukuhara
Tetuya Harada
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co 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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Application granted granted Critical
Publication of US3882837A publication Critical patent/US3882837A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F02M26/63—Systems for actuating EGR valves the EGR valve being directly controlled by an operator
    • 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
    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/39—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in series
    • 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
    • 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
    • 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
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves

Definitions

  • the flow control device is comprised of an exhaust gas recirculation passage, a flow control valve located in the exhaust gas recirculation passage and responsive to the position of a carburetor throttle valve of the engine, and a flow restricting means located in the exhaust gas recirculation passage in series with the flow control valve.
  • the flow restricting means includes another flow control valve responsive to a signal indicative of cold or light load operating conditions of the engine.
  • This invention relates in general to an exhaust gas recirculation system for internal combustion engines and, more particularly, to a flow control device for use in the exhaust gas recirculation system adapted for controlling the flow of exhaust gases recirculated to an intake manifold of the engine.
  • This flow control valve is so arranged as to be actuated in response to opening and closing movements of the carburetor throttle valve for thereby varying the sectional area of the passage through which the engine exhaust gases flow.
  • This arrangement it is quite difficult to control the flow of exhaust gases recirculated to the intake manifold of the engine to an optimum value which is determined in accordance with opening conditions of the engine carburetor throttle valve.
  • Another expedient proposed in the prior art is to provide a flow restriction or orifice in the exhaust gas recirculation passage connected to the intake manifold of the engine.
  • an object of the present invention to provide an improved flow control device for an exhaust gas recirculation system of an internal combustion engine.
  • Another object of the present invention is to provide a flow control device for an exhaust gas recirculation system of an internal combustion engine, which device is adapted to control the amount of exhaust gases recirculated to an intake manifold of the engine to a valve optimum for reducing the toxic nitrogen oxides contained in the exhaust gases.
  • Another object of the present invention is to provide a flow control device for an exhaust gas recirculation system of an internal combustion engine, which device is adapted to control the amount of exhaust gases recirculated to an intake manifold of the engine in accordance with the opening degree of a carburetor throttle valve of the engine.
  • Still another object of the present invention is to provide a flow control device for an exhaust gas recirculation system of an internal combustion engine, which device is capable of controlling the amount of exhaust gases recirculated to an intake manifold of the engine to an optimum value in accordance with opening degree of a carburetor throttle valve of the engine.
  • a further object of the present invention is to provide a flow control device for an exhaust gas recirculation system of an internal combustion engine, which device is simple in construction and economical to manufacture.
  • FIG. 1 is a graph illustrating the relationship between the opening degree ofa carburetor throttle valve and the amount of exhaust recirculation
  • FIG. 2 is a schematic sectional view of a preferred embodiment of the flow control device according to the present invention.
  • FIG. 3 is a view showing a modified form of the flow control device shown in FIG. 2.
  • FIG. 1 there is shown a graph illustrating variations in the amount of exhaust recirculation in terms of the opening degree of a carburetor throttle valve of the engine.
  • curve X represents the amounts of exhaust recirculation which are desirable to control the nitrogen oxide concentration in the exhaust gases.
  • the curve X is mountainshaped and has a maximum point at a given opening degree A of the carburetor throttle valve.
  • Curves Y and Y indicate the amounts of exhaust recirculation, which are obtained in the event that flow control valves are located in the exhaust gas recirculation passages, respectively through the use of prior art devices.
  • Each of these flow control valves is of the type which cooperates with the carburetor throttle valve for varying the effective cross sectional area through which the exhaust gases flow and which is adapted to increase the effective cross sectional area of the exhaust recirculation passage with the increase in the opening degree of the carburetor throttle valve until the opening degree of the carburetor throttle valve reaches approximately the point A or A and thereafter to decrease the effective cross sectional area of the exhaust recurculation passage. Accordingly, it is quite difficult forthe flow control valve to vary the amount of exhaust recirculation so as to approximate the curve X.
  • the flow control valve is arranged to vary the amount of exhaust recirculation so as to approximate the curve X in the range of lower opening degree of the carburetor throttle valve as shown by the curve Y then the amount of exhaust recirculation will be excessively increased in the range of higher opening degree of the carburetor throttle valve. If, on the contrary, the flow control valve is arranged to vary the amount of exhaust recirculation so as to approximate the curve X in the range of higher opening degree of the carburetor throttle valve, then the amount of exhaust recirculation will be insufficient in the range of lower opening degree of the carburetor throttle valve.
  • an additional cam mechanism is required in the prior art exhaust gas recirculation control system for varying the amount of exhaust recirculation in a manner approximate to the curve X shown in FIG. 1.
  • curve Z represents variations in the amount of exhaust recirculation in the event that a flow restriction or orifice is located in the exhaust recirculation passage. Since the exhaust recirculation passage is arranged to communicate with the intake manifold of the engine, the amount of exhaust recirculation admitted through the flow restriction tends to increase as the intake manifold vacuum increases, viz., when the opening degree of the carburetor throttle valve decreases. Thus, it appears that the curve Z falls with the increase in the opening degree of the carburetor throttle valve. Therefore, the amount of exhaust recirculation can be varied so as to approximate the curve X in the range of higher opening degree of the carburetor throttle valve by properly calibrating the effective cross sectional area of the flow restriction. In the range of lower opening area of the carburetor throttle valve, the intake manifold vacuum is so high that the amount of exhaust recirculation increases abruptly and, during this particular range, the exhaust recirculation passage should be shut off.
  • the present invention contemplates to provide an improved flow control device for use in an exhaust recirculation system of an internal combustion engine which device is capable of varying the amount of exhaust recirculation to a valve approximating the curve X.
  • the flow control device proposed by the present invention is specifically suited for use in the exhaust gas recirculation system of an internal combustion engine.
  • the internal combustion engine generally includes, as customary, a carburetor having a throttle valve 12 mounted therein, an intake manifold 14 connected to the carburetor l0 and an exhaust manifold (now shown) through which engine exhaust gases are emitted.
  • the throttle valve 12 is rotatably mounted on a rotary shaft 120.
  • the flow control device which is generally designated by reference numeral 16, has a casing 18 in which a passageway 20 is formed.
  • the passageway 20 forms a part of an exhaust gas recirculation passage and communicates with the exhaust manifold (now shown) of the engine for recirculating a portion of the engine exhaust gases emitted therefrom to the intake manifold 14 of the engine.
  • a butterfly valve 22 is disposed in the passageway 20.
  • the butterfly valve 22 is rotatably mounted on a rotary shaft 22a so as to be rotatably for thereby varying the effective cross sectional area of the passageway 20.
  • the rotary shaft 22a of the butterfly valve 22 is linked with the rotary shaft 12a of the carburetor throttle valve 12 through a mechanical linkage 24.
  • the mechanical linkage 24 is shown as comprising a first arm 26 having its one end connected to the rotary shaft 22a of the butterfly valve 22, connecting rod 28 having its one end connected to the other end of the first arm 26, and a second arm 30 having its one end connected to the other end of the connecting rod 28 and having its other end connected to the rotary shaft 12a of the carburetor throttle valve 12.
  • the butterfly valve 22 is opened and closed in dependence on the opening condition of the carburetor throttle valve 12.
  • the butterfly valve 22 is so arranged as to be closed when the carburetor throttle valve 12 is substantially closed as shown in FIG. 2 whereas when the carburetor throttle valve 12 is rotated counter-clockwise as viewed in FIG. 2 by an acceleration control member (not shown), the rotary shaft 22a of the butterfly valve 22 is rotated clockwise-through the mechanical linkage 24 thereby opening the butterfly valve 22 in dependence on the opening degree of the carburetor throttle valve 12 to vary the amount of the engine exhaust gases E passing through the passageway 20.
  • the cross sectional area of the passageway 20, respective lengths of the first and second arms 26 and 30 and mounting angles of the first and second arms 26 and 30 relative to the rotary shafts 22a and 12a are so determined as to cause the butterfly valve 22 to vary the amount of the exhaust gases passing through the passageway 20 in a manner as shown by the curve Y, of the graph of FIG. 1, viz., to a value which approximates the curve X in FIG, 1 in the range of O A, of the throttle opening.
  • a flow restriction 32 which is located in the exhaust gas recirculation passage downstream of the butterfly valve 22.
  • the flow restriction 32 is shown as consisting of an annular plate 34 having formed therein a restricted opening 34a communicating with the passageway 20.
  • the flow restriction 32 is located in an annular recess 36a formed in an additional casing 36, which is fixedly connected through a gasket 38 to the casing 18 by suitable fastener means 40.
  • the additional casing 36 is also formed with a passageway 42 which is aligned with the passageway 20 of the casing 18 to communicate therewith.
  • the passageway 42 also forms a part of the exhaust gas recirculation passage and communicates with the intake manifold 14 of the engine, though not shown.
  • the effective cross sectional area of the restricted opening 34a is calibrated to be such .as to vary the amount of the exhaust gases recirculated through the exhaust gas recirculation passage in a manner approximate to the curve X in FIG. 1, viz., in a manner as shown by the'curve Z in FIG. 1 when the throttle opening exceeds the level of A in FIG. 1.
  • the combination butterfly valve 22 and flow restriction 32 provided in series with each other provides an advantage in that the amount of exhaust recirculation is controlling in a manner as shown by dotted lines O-C-B which approximates the curve X in FIG. 1.
  • the flow control device 16 may further comprise a second butterfly valve 44 serving as a flow shut off valve which is located in the passageway 20 downstream of the butterfly valve 22 for closing the passageway 20 during cold starting of the engine or when the content of nitrogen oxides is small such as during light load operation of the engine.
  • the flow shut off valve 44 is rotatably mounted on a rotary shaft 44a, to which an arm 46 is fixed.
  • the arm 46 is connected at its one end through a connecting rod 48 to an actuator 50.
  • the actuator 50 may be of type having a diaphragm which is responsive to intake manifold. vacuum of the engine and which is fixedly connected to the rod 48 for rotating the arm 46. To this end, the actuator 50 communicates through a conduit 52 with the intake manifold 14 of the engine.
  • Indicated at 54 is a solenoid valve which is disposed in the conduit 52 for opening and closing the same.
  • This solenoid valve 54 is arranged to be energized for opening the conduit 52 in response to a signal 'S indicative of cold operating condition of the engine or of light load operating condition of the engine.
  • the solenoid valve 54 is energized, the conduit 52 is opened so that the intake manifold vacuum is delivered to the actuator 50.
  • the actuator 50 operates to cause the rod 48 to move downwardly thereby rotating the arm 46 and accordingly the rotaty shaft 44a counterclockwise.
  • the flow shut off butterfly valve 44 is rotated in a direction to close the passageway 20 and, therefore, the flow of exhaust gases is shut off.
  • the second butterfly valve 44 may be so arranged as to be maintained at its slightly opened condition for thereby providing throttle effect even in the event that the engine is operating under the load or under. cold condition and, thus, the annular plate 34 can be dispensed with.
  • suitable means such as a stop (not shown) can be provided as a means for limiting the rotation of the arm 46 and accordingly the opening angle of the second butterfly valve 44.
  • the opening angle of the second butterfly valve can be small and, therefore, the second butterfly valve can be actuated by an electromagnetic solenoid instead of the actuator 50 mentioned hereinabove.
  • FIG. 3 wherein like or corresponding component parts are designated by same reference numerals.
  • the second butterfly valve 44 has functions not only to completely shut off the passageway 20 during light load operating condition and cold operating condition of the engine but also to restrict the flow of exhaust gases passing through the passageway 20 when it is opened.
  • the rotary shaft 44a of the second butterfly valve 44 is secured to an arm 56 having its lower end 56a biased by a tension spring 58 suspended from a flange 60 secured to the casing 18 so that the second butterfly valve 44 is moved in a direction to close the passageway 20.
  • the lower end 56a of the arm 56 is made of a piece of iron and spaced from an opposing end of a magnetic core 62a of an electro-magnetic solenoid 62 by a distance I.
  • the electro-magnetic solenoid 62 is electrically connected to a control unit 64 and controlled thereby in response to the signal S which has been previously mentioned.
  • the electro-magnetic solenoid 62 is de-energized so that the arm 56 is rotated clockwise by the action of the tension spring 58 and, accordingly, the second butterfly valve 44 is maintained in its closed condition. If the signal S disappears, then the control unit 64 energizes the electro-magnetic solenoid 62 so that the magnetic core 62a attracts the lower end 56a of the arm against the action of the tension spring 58. In this condition, the arm 56 is rotated counterclockwise thereby opening the second butterfly valve 44 to a given opening degree determined by the distance I.
  • the opening degree of the second butterfly valve 44 can be suitably determined by selecting the distance 1 between the lower end 56a of the arm and the magnetic core 62a whereby an optimum throttle effect is obtained to vary the amount of exhaust recirculation as shown by the curve X in FIG. 1.
  • the flow control device of the present invention is capable of controlling the amount of exhaust recirculation in a manner optimum for reducing the content of the toxic nitrogen oxides in engine exhaust gases without impairing engine operation.
  • the flow control device of the present invention is constituted by a minimum number of component parts to provide a simple construction which is readily assembled and economical to manufacture.
  • a flow control device for controlling the amount of exhaust recirculation to said intake manifold, said device comprising, in combination, passage means for recirculating engine exhaust gases to said intake manifold, valve means disposed in said passage means and responsive to the opening degree of said throttle valve for varying the effective cross sectional area of said passage means, and-flow restricting means located in said passage means in series with, and downstream of said valve means, said flow restricting means including a butterfly valve downstream of said valve means, a diaphragm type actuator responsive to intake manifold vacuum, a butterfly valve arm linked to said actuator, a passageway connecting said intake manifold to said actuator, a solenoid valve located in said passageway in response to a signal indicative of said engine operating under light load and cold condition causing said actuator to close said butterfly valve through movement of said throttle valve arm linked to said actuator.
  • a flow control device for controlling the amount of exhaust recirculation to said intake manifold, said device comprising, in combination, passage means for recirculating engine exhaust gases to said intake manifold, valve means disposed in said passage means for controlling the effective cross sectional area of said passage means, a mechanical linkage interconnecting said valve means to said carburetor throttle valve for thereby causing said valve means to open and close said passage means in dependence on the position of said carburetor throttle valve, and flow restricting means located in said passage means in series with, and downstream of said valve means, said flow restricting means including a butterfly valve downstream of said valve means, a diaphragm type actuator responsive to intake manifold vacuum, a butterfly valve arm linked to said actuator, a passageway connecting said intake manifold to said actuator, a solenoid valve located in said passageway to close said passageway in response to a signal indicative of said engine operating under light load and
  • a flow control device in which said mechanical linkage includes a first arm secured to said valve means, a connecting rod connected at its one end to said first arm, and a second arm secured to said carburetor throttle valve and connected to the other end of said connecting rod.

Landscapes

  • 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)
US337198A 1972-03-02 1973-03-01 Exhaust gas recirculation control device for internal combustion Expired - Lifetime US3882837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47021728A JPS5122563B2 (US08088816-20120103-C00036.png) 1972-03-02 1972-03-02

Publications (1)

Publication Number Publication Date
US3882837A true US3882837A (en) 1975-05-13

Family

ID=12063122

Family Applications (1)

Application Number Title Priority Date Filing Date
US337198A Expired - Lifetime US3882837A (en) 1972-03-02 1973-03-01 Exhaust gas recirculation control device for internal combustion

Country Status (3)

Country Link
US (1) US3882837A (US08088816-20120103-C00036.png)
JP (1) JPS5122563B2 (US08088816-20120103-C00036.png)
GB (1) GB1411352A (US08088816-20120103-C00036.png)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2636139A1 (de) * 1975-08-12 1977-03-10 Nissan Motor Verbrennungsmotor
US4027638A (en) * 1972-10-16 1977-06-07 Hitachi, Ltd. Exhaust gas recirculation device
US4036191A (en) * 1974-11-05 1977-07-19 Nippondenso Co., Ltd. Exhaust gas recirculation system
US4048968A (en) * 1975-07-17 1977-09-20 Nissan Motor Company, Limited Exhaust gas recirculation system
US4100734A (en) * 1976-01-12 1978-07-18 Nippon Soken, Inc. Exhaust gas purification system for an internal combustion engine
US4122812A (en) * 1976-10-19 1978-10-31 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation apparatus for an internal combustion engine
US4137879A (en) * 1976-06-17 1979-02-06 Toyo Kogyo Co., Ltd. Exhaust gas recirculation means
US4149503A (en) * 1976-10-01 1979-04-17 Nippon Soken, Inc. Exhaust gas recirculation system for an internal combustion engine
US4224912A (en) * 1978-08-02 1980-09-30 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation system with an auxiliary valve
US4282846A (en) * 1978-08-23 1981-08-11 Aisan Industry Co., Ltd. Exhaust gas recirculating device
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
US5531205A (en) * 1995-03-31 1996-07-02 Siemens Electric Limited Rotary diesel electric EGR valve
US6105559A (en) * 1998-11-18 2000-08-22 General Motors Corporation Charge proportioning valve assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53109018A (en) * 1977-03-04 1978-09-22 Mitsubishi Motors Corp Suction control device
AU5518501A (en) * 2000-03-16 2001-09-24 Vesuvius Crucible Co Sliding gate for liquid metal flow control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354179A (en) * 1941-03-24 1944-07-25 Blanc Et L Paiche W Charge forming device
US2421406A (en) * 1944-08-19 1947-06-03 Carter Carburetor Corp Fuel conditioning device
US3513816A (en) * 1968-05-20 1970-05-26 Atlantic Richfield Co Exhaust recycle system for an internal combustion engine
US3673993A (en) * 1969-01-20 1972-07-04 Nissan Motor Air-pollution preventive system for motor vehicles
US3675633A (en) * 1969-01-20 1972-07-11 Nissan Motor Air-pollution preventive system for motor vehicles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354179A (en) * 1941-03-24 1944-07-25 Blanc Et L Paiche W Charge forming device
US2421406A (en) * 1944-08-19 1947-06-03 Carter Carburetor Corp Fuel conditioning device
US3513816A (en) * 1968-05-20 1970-05-26 Atlantic Richfield Co Exhaust recycle system for an internal combustion engine
US3673993A (en) * 1969-01-20 1972-07-04 Nissan Motor Air-pollution preventive system for motor vehicles
US3675633A (en) * 1969-01-20 1972-07-11 Nissan Motor Air-pollution preventive system for motor vehicles

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027638A (en) * 1972-10-16 1977-06-07 Hitachi, Ltd. Exhaust gas recirculation device
US4036191A (en) * 1974-11-05 1977-07-19 Nippondenso Co., Ltd. Exhaust gas recirculation system
US4048968A (en) * 1975-07-17 1977-09-20 Nissan Motor Company, Limited Exhaust gas recirculation system
US4071005A (en) * 1975-08-12 1978-01-31 Nissan Motor Co., Ltd. Internal combustion engine equipped with improved exhaust gas recirculation system
DE2636139A1 (de) * 1975-08-12 1977-03-10 Nissan Motor Verbrennungsmotor
US4100734A (en) * 1976-01-12 1978-07-18 Nippon Soken, Inc. Exhaust gas purification system for an internal combustion engine
US4137879A (en) * 1976-06-17 1979-02-06 Toyo Kogyo Co., Ltd. Exhaust gas recirculation means
US4149503A (en) * 1976-10-01 1979-04-17 Nippon Soken, Inc. Exhaust gas recirculation system for an internal combustion engine
US4122812A (en) * 1976-10-19 1978-10-31 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation apparatus for an internal combustion engine
US4224912A (en) * 1978-08-02 1980-09-30 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation system with an auxiliary valve
US4282846A (en) * 1978-08-23 1981-08-11 Aisan Industry Co., Ltd. Exhaust gas recirculating device
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
US5531205A (en) * 1995-03-31 1996-07-02 Siemens Electric Limited Rotary diesel electric EGR valve
US6105559A (en) * 1998-11-18 2000-08-22 General Motors Corporation Charge proportioning valve assembly

Also Published As

Publication number Publication date
GB1411352A (en) 1975-10-22
JPS4888317A (US08088816-20120103-C00036.png) 1973-11-19
JPS5122563B2 (US08088816-20120103-C00036.png) 1976-07-10

Similar Documents

Publication Publication Date Title
US3882837A (en) Exhaust gas recirculation control device for internal combustion
US3774583A (en) Venturi vacuum responsive exhaust gas recirculation control system
US4484551A (en) Air-air/fuel control device
JPS6025604B2 (ja) 内燃機関の吸気制御方法
US4796579A (en) Automotive type throttle body
GB1254457A (en) Carburetors for internal combustion engines
US3502167A (en) Governing system for engines and automotive vehicles
GB1465921A (en) Choke valve apparatus for internal combustion engine intake air
GB1522010A (en) System for recirculating exhaust gas from the exhaust passage into the induction passage of an internal combustion engine
US4759326A (en) Method of controlling engine idle speed and air throttle therefor
US6378510B1 (en) Exhaust gas recirculation system for an internal combustion engine having an integrated vacuum regulator and delta pressure sensor
US4249490A (en) Exhaust gas recirculation for engine
US3766896A (en) Button valve exhaust gas recirculation system
US4242998A (en) Engine exhaust gas recirculation system
GB1463762A (en) Internal combustion engines
CA1044092A (en) Deceleration control in engine
GB1043865A (en) Improvements in and relating to internal combustion engines
US4116185A (en) Radial carburetor
GB1324873A (en) Internal combustion engine with fuel injection
US3779530A (en) Carburetors
US4005692A (en) Carburetor arranged for recirculating exhaust gases
JPH06193474A (ja) ディーゼルエンジンの吸気絞り弁装置
JPS6124665Y2 (US08088816-20120103-C00036.png)
JPS5912856B2 (ja) 吸気絞り装置を備えたデイ−ゼルエンジン
JPH0429057Y2 (US08088816-20120103-C00036.png)