US3915133A - Device for controlling the recycle of exhaust gas in an internal combustion engine - Google Patents

Device for controlling the recycle of exhaust gas in an internal combustion engine Download PDF

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Publication number
US3915133A
US3915133A US445292A US44529274A US3915133A US 3915133 A US3915133 A US 3915133A US 445292 A US445292 A US 445292A US 44529274 A US44529274 A US 44529274A US 3915133 A US3915133 A US 3915133A
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US
United States
Prior art keywords
exhaust gas
valve
carburetor
throttle valve
internal combustion
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
US445292A
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English (en)
Inventor
Hidetaka Nohira
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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 US3915133A publication Critical patent/US3915133A/en
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Expired - Lifetime legal-status Critical Current

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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
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F02M26/56—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
    • F02M26/57—Systems for actuating EGR valves using vacuum actuators having pressure modulation valves using electronic means, e.g. electromagnetic valves
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/33—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage controlling the temperature of the recirculated gases
    • 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
    • F02M2026/001—Arrangements; Control features; Details
    • F02M2026/004—EGR valve controlled by a temperature signal or an air/fuel ratio (lambda) signal

Definitions

  • This invention relates to an internal combustion engine provided with an exhaust gas recycling means for use with such as an automobile and more particularly to an internal combustion engine in which the watercontent of the exhaust gas recycled is prevented from freezing within the carburetor.
  • FIG. 1 is a chart concerning the freezing condition for the water-content in the exhaust gas
  • FIG. 2 is a system diagram showing an embodiment of the invention.
  • FIG. 3 is a cross-section of another example for mounting the temperature sensor.
  • FIG. 2 An embodiment based on the idea mentioned above is shown in FIG. 2, in which an internal combustion engine comprising, as is well known, an air cleaner 1, a carburetor 2, a suction tube 8 on an engine body 7 and an exhaust tube 9, has a conduit 4 for recycling exhaust gas connected to a portion between the exhausttube 9 and an injection hole 3 provided in the upstream side of the throttle valve 6 of the carburetor, whereby a part of the exhaust gas is recycled from the exhaust tube to the carburetor under the constant pressure on the upstream side of the throttle valve during the engine operation.
  • a cooler 5 for cooling the exhaust gas and an on-off valve 10.
  • the on-off valve 10 comprises a valve seat 11, valve body 12, a diaphragm 13 connected with the valve body 12 on the operating side, a spring 14 provided on the operating side of the diaphragm l3 and a diaphragm chamber 15.
  • the diaphragm 13 Upon introduction of manifold vacuum into the diaphragm chamber 15, the diaphragm 13 is bent upward against the spring 14 to move the valve body 12 away from the valve seat 11 to thereby open the conduit 4.
  • the diaphragm 13 is reset by the spring 14 to bring the valve body 12 into contact with the valve seat 11 which shuts off the conduit 4.
  • the diaphragm chamber 15 of the on-off valve 10 is connected to a magnetic transfer valve 20 by means of pipe 16 which transmits the manifold vacuum.
  • the magnetic transfer valve 20 comprises an outlet port 21 connected with the pipe 16, an inlet port connected by conduit 22 to intake manifold 8, a port 24 open to the ambient air, a valve body 25 which opens either the inlet port or ambient air port 24 when it closes the other, a spring 26 and a coil .27 for operating the valve body 25.
  • the valve body 25 closes the ambient air port 24 and connects the inlet port attached to line 22 and the outlet port 21 so that the diaphragm chamber 15 will be supplied with manifold vacuum.
  • the spring 26 causes the valve body 25 to close the manifold vacuum inlet port and thus connects the ambient air port 24 and outlet port 21 so that the diaphragm chamber 15 is restored to atmospheric pressure.
  • a temperature sensor 16 is embedded in the carburetor 2 near its throttle valve 6 for detecting the temperature about the throttle valve.
  • the temperature sensor 17 is electrically connected to the coil 27 of the magnetic transfer valve 20 via a controller 18 which deter mines whether a freezing condition is present in the interior of the carburetor.
  • the temperature sensor may comprise a thermistor using electrical resistance variation, a thermoswitch using a material property variation, etc., and it may be built into the valve shaft 6 of the throttle valve 6, as shown in FIG. 3.
  • the controller 18 under normal weather conditions, the controller 18 generates an electric signal in response to the inner temperature of the carburetor sensed by the temperature sensor 17, so that the magnetic transfer valve 20 acts to supply manifold vacuum to the diaphragm chamber 15 to open the on-off valve 10 thereby recycling a part of the exhaust gas to the carburetor 2.
  • the controller 18 no longer generates an electric signal. This causes the magnetic transfer valve 20 to restore atmsopheric pressure in the diaphragm chamber 15 which closes the on-off valve 10 to thereby stop the recycling of the exhaust gas and as a result, freezing is prevented.
  • the recycling of exhaust gas can be stopped to prevent the freezing of the moisture contained in the exhaust gas whenever freezing is likely to take place, so that the throttle valve is always maintained in a reliable condition for the driver. Since the presence or absence of the freezing condition is determined'from the temperature in the carburetor, it is possible to obtain a reliable operation and a simplified construction for the controller.
  • An internal combustion engine exhaust gas recycle control device comprising a conduit for recycling exhaust gas connected from the exhaust tube of the engine to the upstream side of the throttle valve of the carburetor, a cooler provided on said conduit, an onsaid carburetor, and an electro-magnetic transfer valve responsive to a signal from said controller for feeding said on-off valve with a pneumatic signal to close the on-off valve whenever there is the danger of freezing.
  • a device according to claim 1 wherein said temperature sensor is positioned within the valve shaft of the throttle valve.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
US445292A 1973-05-07 1974-02-22 Device for controlling the recycle of exhaust gas in an internal combustion engine Expired - Lifetime US3915133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48049792A JPS5247102B2 (de) 1973-05-07 1973-05-07

Publications (1)

Publication Number Publication Date
US3915133A true US3915133A (en) 1975-10-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US445292A Expired - Lifetime US3915133A (en) 1973-05-07 1974-02-22 Device for controlling the recycle of exhaust gas in an internal combustion engine

Country Status (3)

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US (1) US3915133A (de)
JP (1) JPS5247102B2 (de)
AU (1) AU458794B2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963011A (en) * 1973-07-26 1976-06-15 Nissan Motor Co., Ltd. Method and device for adjusting engine exhaust gas recirculation control
FR2355172A1 (fr) * 1976-06-17 1978-01-13 Toyo Kogyo Co Dispositif de recyclage des gaz d'echappement
US4090482A (en) * 1976-08-05 1978-05-23 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation apparatus for an internal combustion engine
US4106449A (en) * 1976-01-20 1978-08-15 Toyota Jidosha Kogyo Kabushiki Kaisha EGR system
US4147141A (en) * 1977-07-22 1979-04-03 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation system in an internal combustion engine
US4173205A (en) * 1977-11-28 1979-11-06 The Bendix Corporation Closed loop exhaust gas recirculation system
US4323045A (en) * 1978-11-30 1982-04-06 Yamaha Hatsudoki Kabushiki Kaisha Flow control device for exhaust gas recycling system

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2287593A (en) * 1940-02-05 1942-06-23 Ball & Ball Carburetor Company Carburetor
US2414296A (en) * 1943-10-13 1947-01-14 Garrett Corp Aires Mfg Company Anti-icing control for engine systems
US2464047A (en) * 1947-09-24 1949-03-08 Gen Electric Carburetor deicing control system
US2658734A (en) * 1949-08-26 1953-11-10 Carter Carburetor Corp Carburetor de-icing means
US3210058A (en) * 1964-03-06 1965-10-05 Oliver D Colvin Carburetor deicing device
US3242473A (en) * 1963-07-23 1966-03-22 Jr Charles B Shivers Apparatus for detecting the presence of water and ice in the fuel systems of aircraft
US3512509A (en) * 1969-04-10 1970-05-19 Atlantic Richfield Co Control mechanism for exhaust recycle system
US3646764A (en) * 1969-05-30 1972-03-07 Nissan Motor Air pollution preventive system for motor vehicles
US3783847A (en) * 1972-12-06 1974-01-08 Ford Motor Co Engine spark control and exhaust gas recirculation vacuum signal selector
US3800764A (en) * 1972-03-14 1974-04-02 Toyota Motor Co Ltd Exhaust gas recycling system
US3805752A (en) * 1973-02-23 1974-04-23 Gen Motors Corp Quenched combustion separated charge internal combustion engine
US3817232A (en) * 1971-11-22 1974-06-18 Nissan Motor Method and apparatus for reducing toxic compounds in exhaust gases from combustion type power plant

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2287593A (en) * 1940-02-05 1942-06-23 Ball & Ball Carburetor Company Carburetor
US2414296A (en) * 1943-10-13 1947-01-14 Garrett Corp Aires Mfg Company Anti-icing control for engine systems
US2464047A (en) * 1947-09-24 1949-03-08 Gen Electric Carburetor deicing control system
US2658734A (en) * 1949-08-26 1953-11-10 Carter Carburetor Corp Carburetor de-icing means
US3242473A (en) * 1963-07-23 1966-03-22 Jr Charles B Shivers Apparatus for detecting the presence of water and ice in the fuel systems of aircraft
US3210058A (en) * 1964-03-06 1965-10-05 Oliver D Colvin Carburetor deicing device
US3512509A (en) * 1969-04-10 1970-05-19 Atlantic Richfield Co Control mechanism for exhaust recycle system
US3646764A (en) * 1969-05-30 1972-03-07 Nissan Motor Air pollution preventive system for motor vehicles
US3817232A (en) * 1971-11-22 1974-06-18 Nissan Motor Method and apparatus for reducing toxic compounds in exhaust gases from combustion type power plant
US3800764A (en) * 1972-03-14 1974-04-02 Toyota Motor Co Ltd Exhaust gas recycling system
US3783847A (en) * 1972-12-06 1974-01-08 Ford Motor Co Engine spark control and exhaust gas recirculation vacuum signal selector
US3805752A (en) * 1973-02-23 1974-04-23 Gen Motors Corp Quenched combustion separated charge internal combustion engine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963011A (en) * 1973-07-26 1976-06-15 Nissan Motor Co., Ltd. Method and device for adjusting engine exhaust gas recirculation control
US4106449A (en) * 1976-01-20 1978-08-15 Toyota Jidosha Kogyo Kabushiki Kaisha EGR system
FR2355172A1 (fr) * 1976-06-17 1978-01-13 Toyo Kogyo Co Dispositif de recyclage des gaz d'echappement
US4090482A (en) * 1976-08-05 1978-05-23 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation apparatus for an internal combustion engine
US4147141A (en) * 1977-07-22 1979-04-03 Toyota Jidosha Kogyo Kabushiki Kaisha Exhaust gas recirculation system in an internal combustion engine
US4173205A (en) * 1977-11-28 1979-11-06 The Bendix Corporation Closed loop exhaust gas recirculation system
US4323045A (en) * 1978-11-30 1982-04-06 Yamaha Hatsudoki Kabushiki Kaisha Flow control device for exhaust gas recycling system

Also Published As

Publication number Publication date
JPS49135027A (de) 1974-12-26
AU6754774A (en) 1975-03-06
JPS5247102B2 (de) 1977-11-30
AU458794B2 (en) 1975-03-06

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