EP0172591A1 - Improved electroinjector for feeding fuel to an internal combustion engine - Google Patents
Improved electroinjector for feeding fuel to an internal combustion engine Download PDFInfo
- Publication number
- EP0172591A1 EP0172591A1 EP85201124A EP85201124A EP0172591A1 EP 0172591 A1 EP0172591 A1 EP 0172591A1 EP 85201124 A EP85201124 A EP 85201124A EP 85201124 A EP85201124 A EP 85201124A EP 0172591 A1 EP0172591 A1 EP 0172591A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electroinjector
- core
- annular
- armature
- shoulder
- 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.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1607—Armatures entering the winding
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
- F02M51/0667—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature acting as a valve or having a short valve body attached thereto
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/08—Injectors peculiar thereto with means directly operating the valve needle specially for low-pressure fuel-injection
Definitions
- a particular object of the present invention is to realize an electroinjector in which the magnetic and hydraulic stick ing effect is eliminated between the shoulder surfaces of the armature and of the core, such object being achieved by resorting to a range of measures consisting of placing a shoulder element in an intermediate position between the armature and the core, in such a way as to leave a gap which prevents the magnetic sticking, of reducing to the minimum the contact area between the armature and the shoulder element, and of hardening at least one of the mating surfaces, so as to reduce the adhesion force, and at the same time to maintain unchang ed with time the effective contact area.
- an electroinjector realized according to the principles of the present invention is charac
- the present invention relates to an electroinjector structurally consisting of a central core of ferromagnetic material, of a coil wound on said core, of a movable armature of ferromagnetic material containing at its end an insert of material suitable to build a tight hydraulic seal when the same is pressed by a return spring on an injection nozzle beneath, of a pipe insert ed inside said central core, which protrudes inward, penetrating inside a hollow part of the armature, so as to act at the same time as a guide means for the armature itself, and partly as means for feeding the fuel to the nozzle, and finally of an outside body which closes the magnetic loop with the central ccre and the armature.
- General purpose of the invention is of providing an electroinjector designed in such a way as to make the armature opening and closing transients quick and repetitive, the armature being of reduced mass, the frictior coefficients between the armature and its relevant guide being low, the gaps being characterized in order to optimising the efficiency both in the opening stage and in the closing stage of the armature, the load of the spring being optimised by intervening from the outside of the injector.
- the time duration of the closing transient of the armature/stop- per can be influenced by the effects of the so-called “hydraulic and magnetic stacking" which is experienced when a direct shoulder of end of stroke between armature and central core exists, due to the relative wear which takes place betweer shoulder surfaces.
- a shoulder element is interplaced, having a substantially annular shape, at least partly consisting of practically amagnetic material, said shoulder element being provided of a substantially annular end wall suitable to come into contact, at least partly, with a portion of the end wall, the latter too being of substantially annular shape, of one of said armature and core, at least one of said substantially annular wall being formed with a shock resistant material.
- the electroinjector according to the invention is structurally consisting of a core 10 of ferromagnetic material, an outside shell 11, it too consisting of ferromagnetic ma terial, and of an armature 12, which form altogether a magnetic loop.
- a coil is indicated, wound on a bobbin 14, which surrounds the central core 10 and can be electric ally powered with intermittent power by means of the con nectors 15 housed within a casing of plastics 16.
- the armature 12 which is coupled with a sealing insert 17 of suitable material, with the interplacing of a washer 18, is guided by a small tube 19 inserted with interference on the central core, and is pressed by a spring 20 against the shoulder of a nozzle 21 equipped with a gauged bore for the outlet of fuel.
- Said spring 20 interacts with an insert 22 insert ed with interference inside the central core 10.
- a packing 23 defines the value of the stroke "H" of armature 12, which ends its stroke against a second annular element 24 assembled on core 10 in such a way as to protrude outward by the same value of desired "T" air gap (Fig. 2).
- Rings 25, 26 and 36 guarantee the hydraulic tightness, whilst the calkings of the shell 11 on the core 10 and on the nozzle 21 render monolithic the electroinjector.
- An electroinjector provided as above described according to the principles of the invention operates as follows.
- Fuel is fed through the outer tubular wall of core 10, passes through the central bore of insert 22, then through bores 27 in the core and bores 28 in the arms- ture, it arrives externally to nozzle 21.
- the spring 20 holds the armature 12 with its sealing insert 17 pressed against the sealing flat surface of the nozzle, which is thus closed.
- the armature 12 may be manufactured with a harder material than pure iron, such as for instance PERMENORM 5000E3.
- the annular inserted element 24 (Figs. 2 and 3) can be made of course from AISI 310 or bronze , and it can be assembled both outside and inside of the central core 10 itself.
- the inserted annular element 24 can be assembled in such a way as to rest against a flat surface 29 of central core 10 (Figs. 1, 6, 7 and 8), or it can be pushed so as to define the desired value of "T" air gap (Figs. 2 and 3), fixing the reached position by dimensional interference, or by other known means, such as by soldering or by glueing means.
- Another way of fix ing the position of element 24 is to provide a longita dinal slot, such as in 30 (Fig. 4) in it, or as in 31 (Fig. 5), along its whole lenght, or along a part of it, then slindingly forcing it on to the central body, exploiting its elasticity within the limits of a given dimensional interference.
- a surface layer can be placed of very reduced thickness, of hard material,on the shoulder surface 32 of armature (Fig. 9), said material could be e.g. titanium nitride.
- the said surfaces can be provided in such a way as to be posi tioned, instead of parallel, so as to form a given a an gle between each other (Fig. 7), of e.g. 1°, or the shoul der surface of the same element 24 can be made radiused, as in 33 (Fig. 6).
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- The repeated shoulder knocks tend to annul the micro-unevennesses of wording, until the shoulder surfaces become perfectly smooth and coplanar, to that the effec tive contact area between the surfaces of the armature and of the central core increases with time and a remar kable increase happens of the adhesion forces, of both magnetic and hydraulic characters.
- The increase of the effective contact area between the armature and the ccre invelves an increase both of the remanence force, arc of the resistance against separation due tc the adhesion, also called as attraction force between contacting smooth surfaces.
- As a consequence of these phenomenors, the drift ap- rears of electroinjectors, in that their response time at closure increases.
- In view of what has been previously exposed, a particular object of the present invention is to realize an electroinjector in which the magnetic and hydraulic stick ing effect is eliminated between the shoulder surfaces of the armature and of the core, such object being achieved by resorting to a range of measures consisting of placing a shoulder element in an intermediate position between the armature and the core, in such a way as to leave a gap which prevents the magnetic sticking, of reducing to the minimum the contact area between the armature and the shoulder element, and of hardening at least one of the mating surfaces, so as to reduce the adhesion force, and at the same time to maintain unchang ed with time the effective contact area.
- More precisely, an electroinjector realized according to the principles of the present invention is charac
- The present invention relates to an electroinjector structurally consisting of a central core of ferromagnetic material, of a coil wound on said core, of a movable armature of ferromagnetic material containing at its end an insert of material suitable to build a tight hydraulic seal when the same is pressed by a return spring on an injection nozzle beneath, of a pipe insert ed inside said central core, which protrudes inward, penetrating inside a hollow part of the armature, so as to act at the same time as a guide means for the armature itself, and partly as means for feeding the fuel to the nozzle, and finally of an outside body which closes the magnetic loop with the central ccre and the armature.
- General purpose of the invention is of providing an electroinjector designed in such a way as to make the armature opening and closing transients quick and repetitive, the armature being of reduced mass, the frictior coefficients between the armature and its relevant guide being low, the gaps being characterized in order to optimising the efficiency both in the opening stage and in the closing stage of the armature, the load of the spring being optimised by intervening from the outside of the injector.
- As it is known to those skilled in the art, the time duration of the closing transient of the armature/stop- per can be influenced by the effects of the so-called "hydraulic and magnetic stacking" which is experienced when a direct shoulder of end of stroke between armature and central core exists, due to the relative wear which takes place betweer shoulder surfaces.
terized in that between its armature and its core a shoulder element is interplaced, having a substantially annular shape, at least partly consisting of practically amagnetic material, said shoulder element being provided of a substantially annular end wall suitable to come into contact, at least partly, with a portion of the end wall, the latter too being of substantially annular shape, of one of said armature and core, at least one of said substantially annular wall being formed with a shock resistant material. - The structural and functional characteristics of the invention and its advantages in comparison to the present art will appear still more evident from the fol lowing disclosure, referred to the schematic drawings attached, which show examples of embodiments of the invention itself.
- In the drawings:
- Fig. 1 is a longitudinal section view showing an electroinjector designed according to the invention; and
- Figs. from 2 to 9 are enlarged details illustrating components and alternatives of the invention itself.
- Referring first to Fig. 1 of the drawings, the electroinjector according to the invention is structurally consisting of a
core 10 of ferromagnetic material, anoutside shell 11, it too consisting of ferromagnetic ma terial, and of anarmature 12, which form altogether a magnetic loop. - By 13 a coil is indicated, wound on a
bobbin 14, which surrounds thecentral core 10 and can be electric ally powered with intermittent power by means of thecon nectors 15 housed within a casing ofplastics 16. - The
armature 12, which is coupled with a sealinginsert 17 of suitable material, with the interplacing of awasher 18, is guided by asmall tube 19 inserted with interference on the central core, and is pressed by aspring 20 against the shoulder of anozzle 21 equipped with a gauged bore for the outlet of fuel. - Said
spring 20 interacts with aninsert 22 insert ed with interference inside thecentral core 10. - A
packing 23 defines the value of the stroke "H" ofarmature 12, which ends its stroke against a secondannular element 24 assembled oncore 10 in such a way as to protrude outward by the same value of desired "T" air gap (Fig. 2). -
Rings shell 11 on thecore 10 and on thenozzle 21 render monolithic the electroinjector. - An electroinjector provided as above described according to the principles of the invention operates as follows.
- Fuel is fed through the outer tubular wall of
core 10, passes through the central bore ofinsert 22, then throughbores 27 in the core and bores 28 in the arms- ture, it arrives externally tonozzle 21. - Until the electroinjector is not electrically power ed, the
spring 20 holds thearmature 12 with itssealing insert 17 pressed against the sealing flat surface of the nozzle, which is thus closed. - When, by means of the
electrical connectors 15, electrical current is fed to thecoil 13, a flux is generated in the magnetic loop, which drawsback armature 12 from its sealing position to its position of stroke end, defined by the shoulder on theannular element 24 of non magnetic hardened material. This lifting ofarmature 12, which takes place within a very short time (opening transient) allows the fuel to flow out of the nozzle in a quantity which, at each cycle, for a given gauging of the nozzle, is a function of fuel pressure, and of electrical excitation of the coil. - When the electrical powering is turned off, the armature returns to its shoulder position on the sealing seat of the nozzle, pushed by
spring 20 within a time which characterizes the closure transient. - The
armature 12 may be manufactured with a harder material than pure iron, such as for instance PERMENORM 5000E3. The annular inserted element 24 (Figs. 2 and 3) can be made of course from AISI 310 or bronze , and it can be assembled both outside and inside of thecentral core 10 itself. - Moreover, the inserted
annular element 24 can be assembled in such a way as to rest against aflat surface 29 of central core 10 (Figs. 1, 6, 7 and 8), or it can be pushed so as to define the desired value of "T" air gap (Figs. 2 and 3), fixing the reached position by dimensional interference, or by other known means, such as by soldering or by glueing means. Another way of fix ing the position ofelement 24 is to provide a longita dinal slot, such as in 30 (Fig. 4) in it, or as in 31 (Fig. 5), along its whole lenght, or along a part of it, then slindingly forcing it on to the central body, exploiting its elasticity within the limits of a given dimensional interference. - Moreover, to the purpose of reducing still more the wear effect of the
annular element 24 by the stroke end shoulder surface of thearmature 12, a surface layer can be placed of very reduced thickness, of hard material,on theshoulder surface 32 of armature (Fig. 9), said material could be e.g. titanium nitride. - In addition, by ensuring the hardening of the should er surfaces of
element 24, as well as ofarmature 12, the said surfaces can be provided in such a way as to be posi tioned, instead of parallel, so as to form a given a an gle between each other (Fig. 7), of e.g. 1°, or the shoul der surface of thesame element 24 can be made radiused, as in 33 (Fig. 6). - By both these solutions, the contact surface between the two components of the shoulder is as reduced as pos sible.
- In any cases, the introduction of the annular element inserted 24, which defines the "T" air gap and the end of the stroke "H" of armature, eliminates the magnetic stick ing effect, whilst the hydraulic sticking effect is mini mised by the reduced thickness of the wall of
element 24 itself and by the hardness of contact surfaces, being it possible to increase such hardness as previously explain ed. - Moreover, by increasing the hardness of the shoulder surfaces, it becomes possible to further on reduce the contact geometry of said surfaces, by varying the shape of either or of both the surfaces said.
- In addition, in order to avoiding a possible pumping effect of the liquid present inside the annular chamber 34 (Fig. 2), which, during the initial stage of downward motion of armature could give rise to a delay of closure transient, providing id projected of at least a
slot 35 on the upper end of armature itself (Fig. 9).
Claims (15)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2186984 | 1984-07-12 | ||
IT21869/84A IT1175561B (en) | 1984-07-12 | 1984-07-12 | IMPROVED ELECTROINJECTOR FOR FOOD FUEL TO A C.I. ENGINE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0172591A1 true EP0172591A1 (en) | 1986-02-26 |
EP0172591B1 EP0172591B1 (en) | 1989-03-08 |
Family
ID=11188005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85201124A Expired EP0172591B1 (en) | 1984-07-12 | 1985-07-09 | Improved electroinjector for feeding fuel to an internal combustion engine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0172591B1 (en) |
DE (1) | DE3568610D1 (en) |
IT (1) | IT1175561B (en) |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0215527A1 (en) * | 1985-09-19 | 1987-03-25 | WEBER S.r.l. | Electroinjector for feeding fuel to an internal combustion engine, and process for manufacturing it |
FR2606830A1 (en) * | 1986-11-15 | 1988-05-20 | Hitachi Ltd | ELECTROMAGNETIC FUEL INJECTOR |
WO1988004727A1 (en) * | 1986-12-23 | 1988-06-30 | Lucas Industries Public Limited Company | Fuel injector |
EP0301620A2 (en) * | 1987-07-27 | 1989-02-01 | WEBER S.r.l. | Electromagnetically controlled fuel injector for feeding fuel to internal combustion engines |
DE3834447A1 (en) * | 1988-10-10 | 1990-04-12 | Mesenich Gerhard | ELECTROMAGNETIC INJECTION VALVE AND METHOD FOR THE PRODUCTION THEREOF |
WO1993003272A1 (en) * | 1991-07-29 | 1993-02-18 | Siemens Automotive L.P. | Means for attenuating audible noise from a solenoid-operated fuel injector |
EP0454675B1 (en) * | 1988-10-10 | 1993-08-11 | Siemens Aktiengesellschaft | Electromagnetic fuel injector with tilt armature |
WO1995016126A1 (en) * | 1993-12-09 | 1995-06-15 | Robert Bosch Gmbh | Electromagnetic valve |
WO1995016125A1 (en) * | 1993-12-09 | 1995-06-15 | Robert Bosch Gmbh | Electromagnetic valve |
WO1998003789A1 (en) * | 1996-07-23 | 1998-01-29 | Peugeot Motocycles S.A. | Solenoid valve such as an impact solenoid valve for a hammer-effect fuel injection system in a motor vehicle |
FR2751701A1 (en) * | 1996-07-23 | 1998-01-30 | Peugeot Motocycles Sa | Impact or ram-effect type electro-magnetic valve for automobile fuel injection system |
EP1088986A1 (en) * | 1999-09-28 | 2001-04-04 | MAGNETI MARELLI S.p.A. | Fuel injector |
EP1089301A1 (en) * | 1999-10-01 | 2001-04-04 | Siemens Automotive Corporation | Apparatus and method for changing the dynamic response of an electromagnetically operated actuator |
EP1279826A1 (en) * | 2001-07-27 | 2003-01-29 | MAGNETI MARELLI POWERTRAIN S.p.A. | Electromagnetic actuator for a fuel injector |
RU2494281C1 (en) * | 2012-06-20 | 2013-09-27 | Общество с ограниченной ответственностью "Газовая индустрия" | Gas fuel feed injector |
WO2015074927A1 (en) * | 2013-11-19 | 2015-05-28 | Robert Bosch Gmbh | Valve for metering fluid |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005035613B3 (en) * | 2005-07-29 | 2006-08-31 | Staiger Gmbh & Co. Kg | Electromagnetic valve for gaseous and liquid media comprises an electric coil and an axially displaceable magnetic anchor arranged in a magnetic housing with a medium inlet, a magnetic core and a casing |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2988675A (en) * | 1958-03-28 | 1961-06-13 | Allied Control Co | Solenoid-actuated device |
DE2123145A1 (en) * | 1970-05-12 | 1971-11-25 | Vyzk Ustav Automatizacznich Pr | Electric switch for pneumatic signals consisting of solenoid valves |
FR2241008A1 (en) * | 1973-08-17 | 1975-03-14 | Tech Haute Precision | Electro-magnetic petrol injector with rapid action - has accurately controlled annular fuel passage |
DE2639274A1 (en) * | 1976-09-01 | 1978-03-02 | Binder Magnete | Damped armature assembly for electromagnet - has damping plate on front end hitting damping mass which in turn hits damping ring |
DE3015192A1 (en) * | 1978-11-17 | 1981-10-22 | Innovation Techniques Avances-Innota, Aubagne | ELECTROMAGNETIC INJECTION NOZZLE AND METHOD FOR THE PRODUCTION THEREOF |
US4311280A (en) * | 1980-07-21 | 1982-01-19 | General Motors Corporation | Electromagnetic fuel injector with adjustable armature spring |
-
1984
- 1984-07-12 IT IT21869/84A patent/IT1175561B/en active
-
1985
- 1985-07-09 DE DE8585201124T patent/DE3568610D1/en not_active Expired
- 1985-07-09 EP EP85201124A patent/EP0172591B1/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2988675A (en) * | 1958-03-28 | 1961-06-13 | Allied Control Co | Solenoid-actuated device |
DE2123145A1 (en) * | 1970-05-12 | 1971-11-25 | Vyzk Ustav Automatizacznich Pr | Electric switch for pneumatic signals consisting of solenoid valves |
FR2241008A1 (en) * | 1973-08-17 | 1975-03-14 | Tech Haute Precision | Electro-magnetic petrol injector with rapid action - has accurately controlled annular fuel passage |
DE2639274A1 (en) * | 1976-09-01 | 1978-03-02 | Binder Magnete | Damped armature assembly for electromagnet - has damping plate on front end hitting damping mass which in turn hits damping ring |
DE3015192A1 (en) * | 1978-11-17 | 1981-10-22 | Innovation Techniques Avances-Innota, Aubagne | ELECTROMAGNETIC INJECTION NOZZLE AND METHOD FOR THE PRODUCTION THEREOF |
US4311280A (en) * | 1980-07-21 | 1982-01-19 | General Motors Corporation | Electromagnetic fuel injector with adjustable armature spring |
Non-Patent Citations (1)
Title |
---|
PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 106 (M-213)[1251], 10th May 1983; & JP - A - 58 27876 (AISAN KOGYO K.K.) 18-02-1983 * |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0215527A1 (en) * | 1985-09-19 | 1987-03-25 | WEBER S.r.l. | Electroinjector for feeding fuel to an internal combustion engine, and process for manufacturing it |
FR2606830A1 (en) * | 1986-11-15 | 1988-05-20 | Hitachi Ltd | ELECTROMAGNETIC FUEL INJECTOR |
US5012982A (en) * | 1986-11-15 | 1991-05-07 | Hitachi, Ltd. | Electromagnetic fuel injector |
WO1988004727A1 (en) * | 1986-12-23 | 1988-06-30 | Lucas Industries Public Limited Company | Fuel injector |
EP0301620A2 (en) * | 1987-07-27 | 1989-02-01 | WEBER S.r.l. | Electromagnetically controlled fuel injector for feeding fuel to internal combustion engines |
EP0301620A3 (en) * | 1987-07-27 | 1990-02-07 | WEBER S.r.l. | Electromagnetically controlled fuel injector for feeding fuel to internal combustion engines |
DE3834447A1 (en) * | 1988-10-10 | 1990-04-12 | Mesenich Gerhard | ELECTROMAGNETIC INJECTION VALVE AND METHOD FOR THE PRODUCTION THEREOF |
EP0454675B1 (en) * | 1988-10-10 | 1993-08-11 | Siemens Aktiengesellschaft | Electromagnetic fuel injector with tilt armature |
WO1993003272A1 (en) * | 1991-07-29 | 1993-02-18 | Siemens Automotive L.P. | Means for attenuating audible noise from a solenoid-operated fuel injector |
WO1995016125A1 (en) * | 1993-12-09 | 1995-06-15 | Robert Bosch Gmbh | Electromagnetic valve |
WO1995016126A1 (en) * | 1993-12-09 | 1995-06-15 | Robert Bosch Gmbh | Electromagnetic valve |
US5732888A (en) * | 1993-12-09 | 1998-03-31 | Robert Bosch Gmbh | Electromagnetically operable valve |
CN1049951C (en) * | 1993-12-09 | 2000-03-01 | 罗伯特·博施有限公司 | Electromagnetic valve |
WO1998003789A1 (en) * | 1996-07-23 | 1998-01-29 | Peugeot Motocycles S.A. | Solenoid valve such as an impact solenoid valve for a hammer-effect fuel injection system in a motor vehicle |
FR2751700A1 (en) * | 1996-07-23 | 1998-01-30 | Peugeot Motocycles Sa | SOLENOID VALVE FOR EXAMPLE OF IMPACT FOR A FUEL INJECTION SYSTEM BY WATER HAMMER EFFECT IN A VEHICLE ENGINE |
FR2751701A1 (en) * | 1996-07-23 | 1998-01-30 | Peugeot Motocycles Sa | Impact or ram-effect type electro-magnetic valve for automobile fuel injection system |
EP1088986A1 (en) * | 1999-09-28 | 2001-04-04 | MAGNETI MARELLI S.p.A. | Fuel injector |
EP1089301A1 (en) * | 1999-10-01 | 2001-04-04 | Siemens Automotive Corporation | Apparatus and method for changing the dynamic response of an electromagnetically operated actuator |
EP1279826A1 (en) * | 2001-07-27 | 2003-01-29 | MAGNETI MARELLI POWERTRAIN S.p.A. | Electromagnetic actuator for a fuel injector |
RU2494281C1 (en) * | 2012-06-20 | 2013-09-27 | Общество с ограниченной ответственностью "Газовая индустрия" | Gas fuel feed injector |
WO2015074927A1 (en) * | 2013-11-19 | 2015-05-28 | Robert Bosch Gmbh | Valve for metering fluid |
Also Published As
Publication number | Publication date |
---|---|
IT1175561B (en) | 1987-07-01 |
EP0172591B1 (en) | 1989-03-08 |
IT8421869A1 (en) | 1986-01-12 |
IT8421869A0 (en) | 1984-07-12 |
DE3568610D1 (en) | 1989-04-13 |
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Legal Events
Date | Code | Title | Description |
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