US3791360A - Solenoid valve for recycling exhaust gases in internal combustion engines - Google Patents
Solenoid valve for recycling exhaust gases in internal combustion engines Download PDFInfo
- 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
- Authority
- US
- United States
- Prior art keywords
- valve
- housing
- exhaust gases
- spacer tube
- electromagnet
- 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
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
- F02M26/65—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
Landscapes
- 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)
Abstract
In an internal combustion engine including a return conduit connecting the exhaust pipe with the intake manifold to recycle one part of the 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.
Description
Unite States Patent Inventor: Franz Rieger, Wasseralfingen,
Germany Assignee: Robert Bosch 'GmbH, Stuttgart,
Germany Filed: Feb, 3, 1972 Appl. No.: 223,253
Foreign Application Priority Data Feb. 6, 1971 Germany 2105583 U.S. Cl. 123/119 A, 137/333, 317/123 Int. Cl. F02m 25/06 Field of Search" l37/333; 3l7/l23; 123/119 A References Cited UNITED STATES PATENTS 12/1922 Erickson 317/123 Rieger Feb. 12, 1974 [54] SOLENOID VALVE FOR RECYCLING 2,254,472 9 1941 Dahl 137/334 EXHAUST GASES IN INTERNAL COMBUSTION ENGINES FOREIGN PATENTS OR APPLICATIONS 2,002,163 7/1970 Germany 123/119 A Primary ExaminerWendell E. Burns Attorney, Agent, or Firm-Edwin E. Greigg [57] 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.
6 Claims, 2 Drawing Figures PATENTEDFEBI 2 A 3.791.360
sum 2 or 2 Fig. 2
SOLENOID VALVE FOR RECYCLING EXHAUST GASES IN INTERNAL COMBUSTION ENGINES BACKGROUND OF THE INVENTION 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. The 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.
In a known solenoid valve of the aforeoutlined structure (as described, for example, in U.S. Pat. No. 1,439,231) which finds application as a gas valve in gas-heated stoves, there are provided means which,-
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. Such a guide bore, however, in case the valve is intended to be used as an exhaust gas recycling valve, despite a rapid switching by snap action, would become soiled which would lead to a breakdown of the valve. Furthermore, the structure of the setting member in such a valve is quite complex and it could be easily damaged by the hot exhaust gases of the internal combustion engine.
In another known solenoid valve (as described in German Published Application DOS No. 2,002,163, FIG. 2) in which for decreasing the harmful pollutants in exhaust gases under certain operational conditions, one part of the exhaust gases is returned from the exhaust conduit into the air intake conduit, there is provided a setting member formed as an electromagnet, the armature of which has-at one end a valve member which in one of its extreme positions (closing position) closes a passage and thus blocksthe flow of the exhaust gases through the valve housing and in its other extreme position (open position) frees the aforenoted passage. This device, however, has the disadvantage that the armature is in direct contact with the exhaust gases. As a result. the armature may become soiled and thus jamming may occur. Furthermore, the solenoid winding is particularly endangered by the hot exhaust gases.
OBJECT AND SUMMARY OF THE INVENTION.
It is an object of the invention to provide an improved solenoid valve for the partial recycling of exhaust gases in internal combustion engines, wherein the aforenoted disadvantages are eliminated and which operates in a very satisfactory manner even if dirt particles contained in the exhaust gas are passing through the valve member during the switching of the valve.
Briefly stated, according to the invention the setting member is provided with a guide bore for the valve stem and is connected with the valve housing by means of a thinwalled, sleeve-shaped spacer tube made of a- BRIEF DESCRIPTION OF THE DRAWING 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.
DESCRIPTION OF THE PREFERRED EMBODIMENT Turning now to 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). For the sake of clear illustration, 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.
Turning now to FIG. 2, 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. Preferably, 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. To the outside of the spacer tube 31 there are attached cooling fins 32 made of thin metal sheet having a good heat conductivity.
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. Preferably, the diameter D is a multiple of the diameter d.
The valve rod 26 is guided in a guide bore 33 of the electromagnet 28. In an enlargement 34 of the guide bore 33 there is disposed 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. 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 ofa 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.
The entire 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.
What is claimed is:
1. 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:
a. a valve housing having inlet and outlet means to permit passage of said exhaust gases through said housing in an open valve position;
b. an electromagnet functioning as a valve setting member;
c. a movable valve rod of given outer diameter extending to said electromagnet;
d. a first valve seat defining an opening establishing communication between said inlet and outlet means through said housing;
e. a second valve seat defining an opening through which said valve rod extends to said electromagnet;
f. a movable 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; and
g. 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.
2. A solenoid valve as defined in claim 1, including cooling fins affixed externally to said spacer tube.
3. A solenoid valve as defined in claim 1, wherein said spacer tube extends into said housing and forms said second valve seat.
4. 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.
6. A solenoid valve as defined in claim 5, including cooling fins affixed externally to said spacer tube, said cooling fins being made from a metal having relatively greater heat conductivity than said high-alloyed chromiumnickel steel.
Claims (6)
1. 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: a. a valve housing having inlet and outlet means to permit passage of said exhaust gases through said housing in an open valve position; b. an electromagnet functioning as a valve setting member; c. a movable valve rod of given outer diameter extending to said electromagnet; d. a first valve seat defining an opening establishing communication between said inlet and outlet means through said housing; e. a second valve seat defining an opening through which said valve rod extends to said electromagnet; f. a movable 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; and g. 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 thinwalled 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 thinwalled sleeve member being relatively thin with respect to its said inner diameter.
2. A solenoid valve as definEd in claim 1, including cooling fins affixed externally to said spacer tube.
3. A solenoid valve as defined in claim 1, wherein said spacer tube extends into said housing and forms said second valve seat.
4. 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.
6. A solenoid valve as defined in claim 5, including cooling fins affixed externally to said spacer tube, said cooling fins being made from a metal having relatively greater heat conductivity than said high-alloyed chromium nickel steel.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712105583 DE2105583A1 (en) | 1971-02-06 | 1971-02-06 | Solenoid valve for exhaust gas recirculation in internal combustion engines |
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 (en) |
JP (1) | JPS5421888B1 (en) |
DE (1) | DE2105583A1 (en) |
FR (1) | FR2124640A5 (en) |
GB (1) | GB1371691A (en) |
IT (1) | IT947342B (en) |
SE (1) | SE369211B (en) |
Cited By (10)
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 (en) * | 1983-01-10 | 1984-07-19 | Ford-Werke AG, 5000 Köln | DEVICE FOR RECIRCULATING THE EXHAUST GASES OF A DIESEL ENGINE |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2740646C2 (en) * | 1977-09-09 | 1982-05-19 | Bürkert GmbH, 7118 Ingelfingen | Electromagnetically controlled safety shut-off valve |
DE2847748A1 (en) * | 1978-11-03 | 1980-05-22 | Bosch Gmbh Robert | WATER CONTROL VALVE FOR A MOTOR VEHICLE AIR CONDITIONING, IN PARTICULAR HEATING SYSTEM, AND METHOD FOR THE PRODUCTION THEREOF, IN PARTICULAR ADJUSTMENT |
GB2288638B (en) * | 1992-08-28 | 1997-02-05 | Fuji Heavy Ind Ltd | Exhaust gas recirculation control system and method |
DE4321394C2 (en) * | 1993-06-26 | 2000-03-16 | Audi Ag | Exhaust gas recirculation valve for an internal combustion engine |
JP3068746B2 (en) * | 1994-06-17 | 2000-07-24 | 三菱電機株式会社 | Electric flow control valve |
DE4438250A1 (en) * | 1994-10-26 | 1996-05-02 | Bosch Gmbh Robert | Exhaust gas recirculation valve |
Citations (3)
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 (en) * | 1969-01-20 | 1970-07-23 | Nissan Motor | Device on motor vehicles for protection against air pollution |
-
1971
- 1971-02-06 DE DE19712105583 patent/DE2105583A1/en active Pending
- 1971-12-10 FR FR7144530A patent/FR2124640A5/fr not_active Expired
-
1972
- 1972-02-03 US US3791360D patent/US3791360A/en not_active Expired - Lifetime
- 1972-02-04 GB GB523372A patent/GB1371691A/en not_active Expired
- 1972-02-04 SE SE132872A patent/SE369211B/xx unknown
- 1972-02-05 IT IT2027572A patent/IT947342B/en active
- 1972-02-07 JP JP1352872A patent/JPS5421888B1/ja active Pending
Patent Citations (3)
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 (en) * | 1969-01-20 | 1970-07-23 | Nissan Motor | Device on motor vehicles for protection against air pollution |
Cited By (14)
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 (en) * | 1983-01-10 | 1984-07-19 | Ford-Werke AG, 5000 Köln | DEVICE FOR RECIRCULATING THE EXHAUST GASES OF A DIESEL ENGINE |
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 |
---|---|
DE2105583A1 (en) | 1972-08-10 |
FR2124640A5 (en) | 1972-09-22 |
IT947342B (en) | 1973-05-21 |
SE369211B (en) | 1974-08-12 |
GB1371691A (en) | 1974-10-23 |
JPS5421888B1 (en) | 1979-08-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3791360A (en) | Solenoid valve for recycling exhaust gases in internal combustion engines | |
EP0499900B1 (en) | Two-stage high flow purge valve | |
US4763635A (en) | Discharge system for introducing volatilized fuel into an internal combustion engine | |
US5435519A (en) | EGR system having fast-acting EGR valve | |
US5492104A (en) | Exhaust gas recirculation for an internal combustion engine | |
US3783847A (en) | Engine spark control and exhaust gas recirculation vacuum signal selector | |
GB2073316A (en) | Fuel injection installation for preventing vapour lock | |
GB2072306A (en) | Electromagnetically actuable valve | |
US3709204A (en) | Crankcase ventilation | |
GB2250801A (en) | Solenoid actuated control valve | |
US6062536A (en) | Solenoid actuator with sealed armature | |
GB2275989A (en) | Combination valve | |
US3782348A (en) | Combustion engine construction | |
US3291462A (en) | Carburetors comprising an automatic auxiliary starting device | |
US3928966A (en) | Flow control valve for exhaust gas recirculation system | |
US3978831A (en) | Control device for a vacuum advancer | |
EP0229315A2 (en) | Automotive engine idle speed control device | |
US3225753A (en) | Fire check and cold start control device for crankcase ventilator | |
US3807375A (en) | Valve means for the recycling of waste gas in internal combustion engines | |
GB1407489A (en) | Heated induction system for an automotive internal combustion engine | |
JPH07279795A (en) | Solenoid-operated type fuel injection valve | |
US4399780A (en) | Spark advance control mechanism for dual fuel engine | |
US5533707A (en) | Check valve with internal longitudinally displaceable sleeve valve | |
US4005691A (en) | Control installation for exhaust gas recycling | |
US3726512A (en) | Apparatus to regulate the intake air temperature of combustion engine prime movers |