US3791360A - Solenoid valve for recycling exhaust gases in internal combustion engines - Google Patents

Solenoid valve for recycling exhaust gases in internal combustion engines Download PDF

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Publication number
US3791360A
US3791360A US3791360DA US3791360A US 3791360 A US3791360 A US 3791360A US 3791360D A US3791360D A US 3791360DA US 3791360 A US3791360 A US 3791360A
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US
United States
Prior art keywords
valve
housing
exhaust gases
spacer tube
electromagnet
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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
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English (en)
Inventor
F Rieger
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
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Publication of US3791360A publication Critical patent/US3791360A/en
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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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/74—Protection from damage, e.g. shielding means
    • 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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/68—Closing members; Valve seats; Flow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/6198—Non-valving motion of the valve or valve seat
    • Y10T137/6253—Rotary motion of a reciprocating valve
    • Y10T137/6362—Manual rotating means

Definitions

  • ABSTRACT In an internal combustion engine including a return conduit connecting the exhaust pipe with the intake manifold to recycle one part ofthe exhaust gases, there is provided in said return conduit a solenoid valve which has a housing, a movable valve head for opening and closing said return conduit, an electromagnet held externally spaced from said housing by a spacer tube affixed to said housing and a valve rod passing through said spacer tube and carrying at one end said valve head and being secured, at its other end, to the movable armature of said electromagnet.
  • This invention relates to a solenoid valve for recycling exhaust gases in internal combustion engines in which, for the purpose of reducing harmful pollutants in the exhaust gas under certain operational conditions, one portion of the exhaust gas is returned from the exhaust pipe into the air intake tube by means of a valve member or valve head actuated through a valve stem by an electromagnet functioning as a setting member.
  • valve member in one of its extreme positions (closing position), closes a passage and thus blocks the flow of exhaust gases through the valve housing and, in its other extreme position (open position), opens said passage and simultaneously closes another opening to prevent the exhaust gases from flowing to the setting member.
  • valve member upon actuation of the electromagnet, cause a valve member to snap from the closed position into its open position. In the open position the valve member lies against an intermediate flange and seals a guide bore for the valve stem.
  • a guide bore for the valve stem.
  • FIG. 1 is a schematic side elevational view of an internal combustion engine, its exhaust conduit and the incorporated preferred embodiment of the invention and FIG. 2 is a longitudinal sectional view of the preferred embodiment of the invention.
  • FIG. I to the exhaust gas conduit 10 of an internal combustion engine 11, preferably an Otto-engine, there is connected an exhaust gas recycling conduit 12 which, by means of a solenoid valve 13, is separated into two conduit portions 12a and 12b.
  • the conduit portion 12b merges in the intake manifold 14 of the engine 11.
  • the solenoid valve 13, which permits the recycling of one part of the exhaust gases from the exhaust conduit 10 into the intake manifold 14 under certain operational conditions, such as the partial load range, is connected by means of electrical conductors 15 with an electric control apparatus 16 of known structure.
  • the control signals of the apparatus 16 may be generated in response to different operational magnitudes, such as the engine rpm, the vacuum in the intake manifold and/or the angular position of the butterfly valve (not shown).
  • the solenoid valve 13 is shown spaced from the engine and out of proportion with respect thereto. In practice, the solenoid valve 13 may be directly secured to the engine 11. In order to remove coarse impurities from the exhaust gases and to keep them away from the solenoid valve 13, there may be provided a filter 17 in the conduit portion 12a, as shown in phantom lines.
  • the solenoid valve 13 comprises a sheet metal valve housing 20 provided with an inlet nipple 21 and an outlet nipple 22 oriented at right angles with respect to the inlet nipple. Both nipples 21 and 22 communicate with a valve chamber 23 enclosed by the housing 20. About the mouth of the inlet nipple 21 in the valve chamber 23 there is provided a valve seat 24 with which there cooperates a valve head 25. The latter is connected by means of a valve rod 26 with the armature 27 of an electromagnet 28 which operates as a valve setting member and which is externally secured to the valve housing 20 by means of a thinwalled, sleeve-shaped spacer tube 31.
  • the spacer tube 31, having an internal diameter D is made of a material which has a very low heat conductivity for the purpose of preventing heat transmission from the hot exhaust gases in the valve housing 20 to the electromagnet 28.
  • the spacer tube 31 is made of a high-alloyed chromium nickel steel (V2A steel) which, in addition to a low heat conductivity, also has the advantage of having a superior corrosion resistance.
  • V2A steel high-alloyed chromium nickel steel
  • the distance between the internal diameter D of the spacer tube 31 and the diameter d of the valve rod 26 is relatively large to accommodate without obstructing the motion of the valve rod 26 dirt particles carried by the exhaust gases and passing through the valve head 25 during a switching of the valve head position.
  • the diameter D is a multiple of the diameter d.
  • valve rod 26 is guided in a guide bore 33 of the electromagnet 28.
  • a return spring 35 which engages the armature 27 and a base 36 of the enlargement 34.
  • the coil 37 of the electromagnet 28 is connected through terminals 38, 38a to the conductors leading to the control apparatus 16 (shown only in FIG. 1).
  • the valve head 25 is shown in one of its end positions (closing position) in which it is seated in valve seat 24 and thus blocks the passage of exhaust gases from the inlet nipple 21 through the valve housing 20. This position is assumed by the valve head 25 when the electromagnet 28 is in an energized condition.
  • the air gap a necessary in the energized condition of the electromagnet may be set by turning the valve rod 26 which is secured to the valve head 25 by means of a thread 39. On the valve rod 26 beneath the valve head 25 there is threaded a counternut 41.
  • the valve head 25 has a conical sealing face 42 cooperating with the valve seat 24.
  • valve head 25 In its other end position (open position) the valve head 25 lies with its planar upper annular face 43 flat against a seat 44 which is situated in the valve chamber 23 opposite the valve seat 24 and which surrounds the mouth of the spacer tube 31. in this manner the spacer tube 31 is sealed so that no exhaust gases may enter thereinto during gas flow from the inlet nipple 21 to the outlet nipple 22 through the valve chamber 23.
  • the terminus of the spacer tube 31 situated in the chamber 23 is bent outwardly to form a flange 45 which connects the valve housing with the spacer tube 31 and the outer face of which constitutes the valve seat 44.
  • the inlet nipple 21 is connected by means of a flange 46 with the return conduit portion 12a, while the outlet nipple 22 is connected by means of a flange 47 with the return conduit portion 12b.
  • valve assembly 13 is tightened to the inter nal combustion engine housing 11 by means of an angle member 48 in a manner not shown in detail.
  • a solenoid valve for controlling the recycling of exhaust gases from the exhaust pipe into the intake manifold of an internal combustion engine comprising, in combination:
  • valve housing having inlet and outlet means to permit passage of said exhaust gases through said housing in an open valve position;
  • a first valve seat defining an opening establishing communication between said inlet and outlet means through said housing;
  • valve head situated in said housing and secured to said valve rod, said valve head being movable into a first position in which it is seated in said first valve seat for blocking the passage of exhaust gases through said housing, said valve head being movable into a second position in which it is spaced from said first valve seat for permitting the passage of exhaust gases through said housing, said valve head being seated in said second valve seat in said second position to prevent exhaust gases from passing to said electromagnet;
  • a thin-walled, sleeve-shaped spacer tube having an inner diameter which is a multiple of at least two of said given diameter for accommodating, without obstructing motion of said valve rod, dirt particles carried by exhaust gases, said thin-walled sleeve being made of a material of low heat conductivity for preventing heat transmission from hot exhaust gases and said housing to said electromagnet, said spacer tube having one end affixed to said housing and another end affixed to said electromagnet, said spacer tube holding said electromagnet spaced from and externally of said housing, said valve rod passing longitudinally through said spacer tube and said thin-walled sleeve member being relatively thin with respect to its said inner diameter.
  • a solenoid valve as defined in claim 1 wherein said spacer tube is made from a high-alloyed chromium nickel steel. 5. A solenoid valve as defined in claim 2, wherein said cooling fins are made from a metal having a relatively greater heat conductivity than the material of said spacer tube.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Magnetically Actuated Valves (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
US3791360D 1971-02-06 1972-02-03 Solenoid valve for recycling exhaust gases in internal combustion engines Expired - Lifetime US3791360A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712105583 DE2105583A1 (de) 1971-02-06 1971-02-06 Magnetventil zur Abgasrückführung bei Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3791360A true US3791360A (en) 1974-02-12

Family

ID=5797965

Family Applications (1)

Application Number Title Priority Date Filing Date
US3791360D Expired - Lifetime US3791360A (en) 1971-02-06 1972-02-03 Solenoid valve for recycling exhaust gases in internal combustion engines

Country Status (7)

Country Link
US (1) US3791360A (enrdf_load_stackoverflow)
JP (1) JPS5421888B1 (enrdf_load_stackoverflow)
DE (1) DE2105583A1 (enrdf_load_stackoverflow)
FR (1) FR2124640A5 (enrdf_load_stackoverflow)
GB (1) GB1371691A (enrdf_load_stackoverflow)
IT (1) IT947342B (enrdf_load_stackoverflow)
SE (1) SE369211B (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961608A (en) * 1972-11-11 1976-06-08 Robert Bosch G.M.B.H. Valve for controlling the flow of combustion gases in a combustion engine
US4164918A (en) * 1978-02-21 1979-08-21 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
DE3400313A1 (de) * 1983-01-10 1984-07-19 Ford-Werke AG, 5000 Köln Vorrichtung zur rezirkulationsregelung der auspuffgase eines dieselmotors
US4725040A (en) * 1986-02-28 1988-02-16 General Motors Corporation Exhaust gas recirculation valve assembly
US5950604A (en) * 1996-11-29 1999-09-14 Nissan Motor Co., Ltd Engine, engine manufacturing method and engine heat
US6378545B1 (en) * 1998-09-24 2002-04-30 Robert Bosch Gmbh Electromagnetically actuatable hydraulic proportional valve
US20080110939A1 (en) * 2006-11-15 2008-05-15 Nordson Corporation Liquid dispensing apparatus including an attachment member
US20080110940A1 (en) * 2006-11-15 2008-05-15 Nordson Corporation Dispensing apparatus having a pivot actuator

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740646C2 (de) * 1977-09-09 1982-05-19 Bürkert GmbH, 7118 Ingelfingen Elektromagnetisch direkt gesteuertes Sicherheitsabsperrventil
DE2847748A1 (de) * 1978-11-03 1980-05-22 Bosch Gmbh Robert Wassersteuerventil fuer eine kraftfahrzeug-klimaanlage, insbesondere heizungsanlage, sowie verfahren zu dessen herstellung, insbesondere justierung
GB2288638B (en) * 1992-08-28 1997-02-05 Fuji Heavy Ind Ltd Exhaust gas recirculation control system and method
DE4321394C2 (de) * 1993-06-26 2000-03-16 Audi Ag Abgas-Rückführventil für eine Brennkraftmaschine
JP3068746B2 (ja) * 1994-06-17 2000-07-24 三菱電機株式会社 電動式流量制御弁
DE4438250A1 (de) * 1994-10-26 1996-05-02 Bosch Gmbh Robert Abgasrückführventil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1439231A (en) * 1920-09-15 1922-12-19 Arthur F Erickson Valve-operating device
US2254472A (en) * 1939-04-28 1941-09-02 Mason Neilan Regulator Company Combination control and quench valve
DE2002163A1 (de) * 1969-01-20 1970-07-23 Nissan Motor Einrichtung an Kraftfahrzeugen zum Schutz gegen Luftverunreinigung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1439231A (en) * 1920-09-15 1922-12-19 Arthur F Erickson Valve-operating device
US2254472A (en) * 1939-04-28 1941-09-02 Mason Neilan Regulator Company Combination control and quench valve
DE2002163A1 (de) * 1969-01-20 1970-07-23 Nissan Motor Einrichtung an Kraftfahrzeugen zum Schutz gegen Luftverunreinigung

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3961608A (en) * 1972-11-11 1976-06-08 Robert Bosch G.M.B.H. Valve for controlling the flow of combustion gases in a combustion engine
US4164918A (en) * 1978-02-21 1979-08-21 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
DE3400313A1 (de) * 1983-01-10 1984-07-19 Ford-Werke AG, 5000 Köln Vorrichtung zur rezirkulationsregelung der auspuffgase eines dieselmotors
US4479473A (en) * 1983-01-10 1984-10-30 Ford Motor Company Diesel engine emission control system
US4725040A (en) * 1986-02-28 1988-02-16 General Motors Corporation Exhaust gas recirculation valve assembly
AU587681B2 (en) * 1986-02-28 1989-08-24 General Motors Corporation Exhaust gas recirculation valve assembly
US5950604A (en) * 1996-11-29 1999-09-14 Nissan Motor Co., Ltd Engine, engine manufacturing method and engine heat
US6378545B1 (en) * 1998-09-24 2002-04-30 Robert Bosch Gmbh Electromagnetically actuatable hydraulic proportional valve
US20080110939A1 (en) * 2006-11-15 2008-05-15 Nordson Corporation Liquid dispensing apparatus including an attachment member
US20080110940A1 (en) * 2006-11-15 2008-05-15 Nordson Corporation Dispensing apparatus having a pivot actuator
US8061564B2 (en) 2006-11-15 2011-11-22 Nordson Corporation Liquid dispensing apparatus including an attachment member
US8474660B2 (en) * 2006-11-15 2013-07-02 Nordson Corporation Dispensing apparatus having a pivot actuator

Also Published As

Publication number Publication date
FR2124640A5 (enrdf_load_stackoverflow) 1972-09-22
IT947342B (it) 1973-05-21
DE2105583A1 (de) 1972-08-10
JPS5421888B1 (enrdf_load_stackoverflow) 1979-08-02
SE369211B (enrdf_load_stackoverflow) 1974-08-12
GB1371691A (en) 1974-10-23

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