GB1380046A - Internal combustion engines with recirculation of exhaust gas - Google Patents

Internal combustion engines with recirculation of exhaust gas

Info

Publication number
GB1380046A
GB1380046A GB56671A GB56671A GB1380046A GB 1380046 A GB1380046 A GB 1380046A GB 56671 A GB56671 A GB 56671A GB 56671 A GB56671 A GB 56671A GB 1380046 A GB1380046 A GB 1380046A
Authority
GB
United Kingdom
Prior art keywords
orifice
valve
diaphragm
exhaust gas
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
Application number
GB56671A
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.)
Meakers Realisations Ltd
Original Assignee
Meakers Realisations 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 Meakers Realisations Ltd filed Critical Meakers Realisations Ltd
Priority to GB56671A priority Critical patent/GB1380046A/en
Publication of GB1380046A publication Critical patent/GB1380046A/en
Expired legal-status Critical Current

Links

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
    • F02M26/13—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
    • 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
    • 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
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor
    • F02M26/61—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor in response to exhaust pressure
    • 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
    • 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
    • F02M2026/002—EGR valve being controlled by vacuum or overpressure
    • F02M2026/0025—Intake vacuum or overpressure modulating valve

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)

Abstract

1380046 Recirculating I C engine exhaust gas BRITISH LEYLAND (AUSTIN-MORRIS) Ltd 22 March 1972 [6 Jan 1971] 566/71 Heading F1B [Also in Divisions F2 and G3] The flow of exhaust gas through a metering orifice 9 to the intake manifold 5 is controlled by a valve 10 which operates to maintain substantially atmospheric pressure immediately downstream of the orifice so that the orifice meters the recirculation of exhaust gas as a substantially constant percentage of the mass exhaust flow and therefore the mass air flow into the engine 1, e.g. 12 to 17%. The valve member 21 of the valve 10 is operated by a diaphragm 17 subject in the chamber 14 to the intake manifold suction, through the valve stem 23 and orifices 27, 28, and in the chamber 15 to atmospheric pressure, through a duct 19 and air filter 20 and intake manifold suction through a stem orifice 25. The orifice 25 is controlled by a valve member 26 on a diaphragm 18 subjected in a chamber 16, to the pressure at an orifice 33 immediately downstream of the orifice 9 or the substantially constant suction in the carburetter region 7, between the choke and throttle valves, under the control of a valve 11. The valve member 46 of the valve 11 engages the seat 45 when the bi-metallic element 48 is cold and/or the diaphragm 37 is not subjected to sufficient pressure difference in the chambers 35 and 36, connected to the region 7 and the carburetter port 40, to overcome the bias of a spring 38. When the diaphragm 18 is subject to a pressure below atmospheric in chamber 16 the orifice 25 is opened and the pressures on opposite sides of the diaphragm tend to equalize so that the spring 29 moves the valve member 21 to reduce exhaust gas recirculation. When the pressure in chamber 16 is above atmospheric the orifice 25 is closed by the valve member 26 and the valve 21 is moved by the diaphragm 17 to increase recirculation. In operation with the throttle valve 8 substantially fully closed or wide open or with the bi-metallic below a predetemined temperature the valve member 21 prevents recirculation whereas with the chamber 16 connected to the orifice 33 the valve member is positioned to provide substantially constant pressure at the orifice. In another embodiment, Fig. 2 (not shown), the diaphragm 18 is continuously subject to the pressure immediately downstream of the metering orifice (9A). The orifice (9A) contains a valve plug (51) which is operated by a spring-biased diaphragm (57). The diaphragm (57) is subject to intake manifold suction, to cause orifice opening, or atmospheric pressure to cause orifice closing, under the control of a valve (11A). The valve (11A) is controlled by a bi-metallic element (69) and a diaphragm (67) subject to the suction at the carburetter port 40. The valve 10 may comprise a poppet member (21A), Fig. 3 (not shown) connected by a stirrup-shaped member (73) to the hollow valve stem (23A) so that the stem is not in the path of the exhaust gas.
GB56671A 1971-01-06 1971-01-06 Internal combustion engines with recirculation of exhaust gas Expired GB1380046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB56671A GB1380046A (en) 1971-01-06 1971-01-06 Internal combustion engines with recirculation of exhaust gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB56671A GB1380046A (en) 1971-01-06 1971-01-06 Internal combustion engines with recirculation of exhaust gas

Publications (1)

Publication Number Publication Date
GB1380046A true GB1380046A (en) 1975-01-08

Family

ID=9706631

Family Applications (1)

Application Number Title Priority Date Filing Date
GB56671A Expired GB1380046A (en) 1971-01-06 1971-01-06 Internal combustion engines with recirculation of exhaust gas

Country Status (1)

Country Link
GB (1) GB1380046A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100734A (en) * 1976-01-12 1978-07-18 Nippon Soken, Inc. Exhaust gas purification system for an internal combustion engine
US4164918A (en) * 1978-02-21 1979-08-21 General Motors Corporation Exhaust gas recirculation control
US4180034A (en) * 1978-05-25 1979-12-25 General Motors Corporation Exhaust gas recirculation control
US4186703A (en) * 1978-09-06 1980-02-05 General Motors Corporation Exhaust gas recirculation control
US4196707A (en) * 1978-07-31 1980-04-08 General Motors Corporation Exhaust gas recirculation control
US4459804A (en) * 1975-01-22 1984-07-17 Nissan Motor Company, Limited Multiple spark ignition internal combustion engine with exhaust gas recirculation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4459804A (en) * 1975-01-22 1984-07-17 Nissan Motor Company, Limited Multiple spark ignition internal combustion engine with exhaust gas recirculation
US4100734A (en) * 1976-01-12 1978-07-18 Nippon Soken, Inc. Exhaust gas purification system for an internal combustion engine
US4164918A (en) * 1978-02-21 1979-08-21 General Motors Corporation Exhaust gas recirculation control
US4180034A (en) * 1978-05-25 1979-12-25 General Motors Corporation Exhaust gas recirculation control
US4196707A (en) * 1978-07-31 1980-04-08 General Motors Corporation Exhaust gas recirculation control
US4186703A (en) * 1978-09-06 1980-02-05 General Motors Corporation Exhaust gas recirculation control

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed