GB1454419A - Pilot valve for use in an exhaust gas recirculation - Google Patents

Pilot valve for use in an exhaust gas recirculation

Info

Publication number
GB1454419A
GB1454419A GB5951273A GB5951273A GB1454419A GB 1454419 A GB1454419 A GB 1454419A GB 5951273 A GB5951273 A GB 5951273A GB 5951273 A GB5951273 A GB 5951273A GB 1454419 A GB1454419 A GB 1454419A
Authority
GB
United Kingdom
Prior art keywords
valve
pressure
exhaust gas
diaphragm
flow
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
GB5951273A
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.)
Bendix Corp
Original Assignee
Bendix Corp
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 Bendix Corp filed Critical Bendix Corp
Publication of GB1454419A publication Critical patent/GB1454419A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52Systems for actuating EGR valves
    • F02M26/55Systems for actuating EGR valves using vacuum actuators
    • F02M26/56Systems for actuating EGR valves using vacuum actuators having pressure modulation valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65Constructional details of EGR valves
    • F02M26/66Lift valves, e.g. poppet valves
    • F02M26/68Closing members; Valve seats; Flow passages
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65Constructional details of EGR valves
    • F02M26/72Housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/45Sensors specially adapted for EGR systems
    • F02M26/46Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
    • F02M26/47Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates

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

1454419 Exhaust gas recirculation control valve BENDIX CORP 21 Dec 1973 [26 Dec 1972] 59512/73 Heading F1B [Also in Division G3] Exhaust gas recirculation system for I.C. engines comprises a pilot valve which includes first pressure differential responsive means adapted to be exposed to ambient air pressure and to a pressure which varies as a function of engine air-flow and which, in use, generates a first force, second pressure differential responsive means adapted to be exposed to pressure signals whose difference is representative of the circulated exhaust gas flowrate and which, in use, generates a second force, and means for summing said forces, said means being operative to wave a piston member and thereby modulate in accordance with the intensity of the combined forces a signal for controlling the relative opening and closing of an exhaust gas recirculating valve, the modulated control signal providing said valve with a regulation such that the volume of exhaust gas being recirculated to the engines intake manifold varies in a proportion related to the engine air-flow. Valve 20 has a connection 48 to the Venturi of carburetter 41 and a connection 115 to a point downstream of the Venturi and upstream of the throttle valve 46. Fig. 2 shows the exhaust gas recirculation passage which is connected to valve 20 by pipes 37 and 36 which communicate the pressures 52 and 53 in the passage and in a Venturi 35 respectively to the valve. A valve 38 controls the amount of exhaust gas recirculated and is actuated by a diaphragm 13, one side of which is subject to atmospheric pressure and the other side of which is subject to a pressure Sx in pipe 16 connected to valve 20, which regulates the amount of exhaust gas recirculated in a predetermined relationship to engine air-flow. Operation. When engine air-flow is small but increasing, pressure Si from the carburetter Venturi will be less than atmospheric and decreasing. This pressure acts on diaphragm 170, which is subject to atmospheric pressure on its other side, and through passageway 21c' on diaphragm 80. A spring 227 holds valve 225 against seat 226 at small air-flows, so that pressures Sy and S 1 are equal. As air-flow increases, diaphragm 80 is lifted and tends to close valve 27 against seat 92, thus closing off a passageway 91 which communicates with atmosphere through chamber 22d, below diaphragm 80, and passageway 21d'. The pressure Sx then tends more towards the manifold pressure Pw which is established in chamber 122 by connection 115, and pressure Sx acts on diaphragm 13 to open valve 18. Pressures S 2 and S 3 , of which S 3 will be the smaller act on opposite sides of diaphragm 60 and produce a downward force in addition to a downward force caused by the difference between pressures S 3 and Sy which act on opposite sides of diaphragm 70. This downward force tends to move valve 27 on to seat 93, thus reducing the influence of manifold pressure on Sx and tending to reduce the flow of recirculated exhaust gas. The rate of flow of exhaust gas is ultimately limited by an orifice 39 downstream of valve 18, the difference between pressures S 2 and S 3 is no longer sufficient to balance the forces on valve assembly 23 and valve 27 engages seat 92. The reservior 122 which includes check-valve 124 then acts to maintain pressure Sx at a low level, although manifold pressure may vary, thus maintaining the flow of recirculated exhaust gas. As engine air-flow continues to increase, diaphragm 170 is pulled down and valve member 235 engages seat 236, pressure Sy becomes equal to atmospheric pressure, via air opening 229 and passage 221c', valve member 27 closes on to seat 93 and pressure Sx becomes equal to atmospheric so that recirculation valve 18 closes. In a modification a bi-metal spring acts on valve assembly 223 to inhibit recirculation of exhaust gas at predetermined engine or engine bay temperatures.
GB5951273A 1972-12-26 1973-12-21 Pilot valve for use in an exhaust gas recirculation Expired GB1454419A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00318150A US3814070A (en) 1972-12-26 1972-12-26 Exhaust gas recirculation flow control system

Publications (1)

Publication Number Publication Date
GB1454419A true GB1454419A (en) 1976-11-03

Family

ID=23236881

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5951273A Expired GB1454419A (en) 1972-12-26 1973-12-21 Pilot valve for use in an exhaust gas recirculation

Country Status (8)

Country Link
US (1) US3814070A (en)
JP (1) JPS572901B2 (en)
AU (1) AU476179B2 (en)
CA (1) CA987559A (en)
DE (1) DE2364712C2 (en)
FR (1) FR2211971A5 (en)
GB (1) GB1454419A (en)
IT (1) IT1002267B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204915A (en) * 1987-05-12 1988-11-23 Ford Motor Co I.c. engine exhaust gas recirculation control

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924589A (en) * 1973-03-17 1975-12-09 Toyota Motor Co Ltd Exhaust gas recirculating apparatus
IT996383B (en) * 1973-05-10 1975-12-10 Pierburg Kg A CONTROL DEVICE FOR THE RETURN OF EXHAUST GAS IN THE INTAKE PIPES OF AN INTERNAL COMBUSTION ENGINE
JPS5060627A (en) * 1973-10-02 1975-05-24
US3915136A (en) * 1974-02-25 1975-10-28 Ranco Inc Control system for exhaust gas recirculating valve
US4022237A (en) * 1974-02-28 1977-05-10 The Bendix Corporation Exhaust gas recirculation flow control system
US3926161A (en) * 1974-02-28 1975-12-16 Bendix Corp Exhaust gas recirculation flow control system
JPS5234687B2 (en) * 1974-06-24 1977-09-05
JPS5345857B2 (en) * 1974-06-24 1978-12-09
JPS5235822B2 (en) * 1974-06-25 1977-09-12
JPS5345858B2 (en) * 1974-06-27 1978-12-09
GB1520933A (en) * 1975-01-22 1978-08-09 Nissan Motor Multiple spark ignition internal combustion engine with exhaust gas recirculation
JPS555745Y2 (en) * 1975-06-13 1980-02-08
JPS521324A (en) * 1975-06-24 1977-01-07 Toyota Motor Corp Exhaust gas recirculation apparatus
US4071006A (en) * 1975-08-12 1978-01-31 Nissan Motor Co., Ltd. Exhaust gas recirculating system
JPS5610901Y2 (en) * 1975-09-06 1981-03-12
JPS5290729A (en) * 1976-01-23 1977-07-30 Nissan Motor Co Ltd Exhaust gas recirculation control device
JPS52139916U (en) * 1976-04-19 1977-10-24
JPS53323A (en) * 1976-06-23 1978-01-05 Nissan Motor Co Ltd Exhaust circulation control system
US4148286A (en) * 1976-10-01 1979-04-10 Nippon Soken, Inc. Exhaust gas recirculation system for an internal combustion engine
US4130094A (en) * 1977-08-03 1978-12-19 Ford Motor Company Exhaust gas recirculation valve assembly
JPS552827A (en) * 1978-06-20 1980-01-10 Hitachi Ltd Solenoid valve
US4248186A (en) * 1978-09-29 1981-02-03 Hitachi, Ltd. Exhaust gas recirculation control system
JPS5672250A (en) * 1979-11-15 1981-06-16 Honda Motor Co Ltd Controller for exhaust gas recirculation in engine
US5203313A (en) * 1992-06-19 1993-04-20 Bundy Corporation EGR venturi coupler
US5255659A (en) * 1992-09-28 1993-10-26 Ford Motor Company Pressure balanced exhaust gas recirculation valve
CN108979906B (en) * 2018-08-03 2020-11-20 潍柴动力股份有限公司 EGR valve and engine
FR3142268A1 (en) 2022-11-17 2024-05-24 Psa Automobiles Sa Managing the functionalities of a motor vehicle using a gesture-driven human-machine interface
CN116175990B (en) * 2023-04-24 2023-07-11 国营川西机器厂 Device and method for solving oil leakage faults of aeroengine parting film

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2364712A (en) * 1942-10-10 1944-12-12 Harvel Res Corp Condensation products of phenols and phenolic ethers, and method of preparing the same
US3507260A (en) * 1967-05-01 1970-04-21 Brooks Walker Exhaust recirculation control for an engine
GB1262252A (en) * 1969-01-20 1972-02-02 Nissan Motor Exhaust recirculation system for motor vehicles
US3648672A (en) * 1969-08-10 1972-03-14 Toyo Kogyo Co Device for purifying the exhaust gas of an internal combustion engine to reduce the nitrogen oxide content
US3581719A (en) * 1969-10-30 1971-06-01 Chrysler Corp Fluidic exhaust recirculator for two stroke cycle engines
US3643425A (en) * 1970-02-12 1972-02-22 Exxon Research Engineering Co Low-polluting internal combustion engine wherein secondary air is injected into the exhaust ports
DE2011464C3 (en) * 1970-03-11 1976-01-08 Volkswagenwerk Ag, 3180 Wolfsburg Internal combustion engine with exhaust gas recirculation
US3662722A (en) * 1970-04-22 1972-05-16 Chrysler Corp Cool exhaust recycling
US3741179A (en) * 1971-07-01 1973-06-26 Ford Motor Co Exhaust gas recirculating system control
JPS527494A (en) * 1975-07-01 1977-01-20 Nagata Jozo Kikai Kk Method of making malted rice by supplying water and nutrients during c ultivation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2204915A (en) * 1987-05-12 1988-11-23 Ford Motor Co I.c. engine exhaust gas recirculation control

Also Published As

Publication number Publication date
DE2364712A1 (en) 1974-06-27
FR2211971A5 (en) 1974-07-19
AU476179B2 (en) 1976-09-16
IT1002267B (en) 1976-05-20
JPS4996134A (en) 1974-09-11
DE2364712C2 (en) 1982-03-25
US3814070A (en) 1974-06-04
CA987559A (en) 1976-04-20
AU6389173A (en) 1975-06-26
JPS572901B2 (en) 1982-01-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee