Electromagnetic injection valve

Claim 2

An electromagnetic valving assembly, comprising an electromagnet with armature and an armature-actuated valve member whose mass is much less than that of the armature and which is not fixedly connected with the armature so that the armature can exert a force on the valve member in one direction only, characterized in that before the start of an actuation cycle the armature is retained in the inoperative position by resilient restraining means, wherein the holding force of said restraining means is only a fraction of the saturation induction force of said electromagnet, wherein after overcoming said holding force said armature travels a major part of the armature stroke without causing said valve member to move in the direction of armature movement, and wherein only after traveling a major part of the armature stroke said armature impinges on said valve member at high speed and in so doing said armature moves said valve member in the direction of armature movement so that a substantial part of the work of opening said valve member is attained by the kinetic energy of said armature and of parts connected with said armature.

Claim 3

An electromagnetic valve assembly according to claim 1 characterized in that the mechanical opening force of said valve member is higher than the saturation magnetic force of said electromagnet.

Claim 4

An electromagnetic valve assembly according to claim 1 characterized in that said valve member upon opening movement is pressurized on all sides by the system pressure.

Claim 5

An electromagnetic valving assembly, comprising an electromagnet with armature and an armature-actuated valve member whose mass is much less than that of the armature and which is not fixedly connected with the armature so that the armature can exert a force on the valve member in one direction only, characterized in that before the start of an actuation cycle the armature is retained in the inoperative position by resilient restraining means, wherein the holding force of said restraining means is only a fraction of the saturation induction force of said electromagnet, wherein after overcoming said holding force said armature travels a major part of the armature stroke without transmitting any substantial forces to said valve member, wherein after traveling a major part of the armature stroke said armature impinges on said valve member at high speed and in so doing said armature moves said valve member in the direction of armature movement so that a substantial part of the work of opening said valve member is attained by the kinetic energy of said armature and of parts connected with said armature, and further characterized in that said armature said parts connected with said armature or said valve member impinge, after having traveled a portion of the opening stroke, on a supplementary mass which is under the load of a strong spring, so that the mechanical end force lies only little below the saturation induction force of said electromagnet.

Claim 6

An electromagnetic valving assembly, comprising an electromagnet with armature and an armature-actuated valve member whose mass is much less than that of the armature and which is not fixedly connected with the armature so that the armature can exert a force on the valve member in one direction only, characterized in that before the start of an actuation cycle the armature is retained in the inoperative position by resilient restraining means, wherein the holding force of said restraining means is only a fraction of the saturation induction force of said electromagnet, wherein after overcoming said holding force said armature travels a major part of the armature stroke without transmitting any substantial forces to said valve member, wherein after traveling a major part of the armature stroke said armature impinges on said valve member at high speed and in so doing said armature moves said valve member in the direction of armature movement so that a substantial part of the work of opening said valve member is attained by the kinetic energy of said armature and of parts connected with said armature, and further characterized in that said armature said parts connected with said armature or said valve member impinge, after having traveled a portion of the opening stroke, on a supplementary mass which is under the load of a strong spring, so that the mechanical end force lies only little below the saturation induction force of said electromagnet.

Claim 7

An electromagnetic valving assembly, comprising an electromagnet with armature and an armature-actuated valve member whose mass is much less than that of the armature and which is not fixedly connected with the armature so that the armature can exert a force on the valve member in one direction only, characterized in that before the start of an actuation cycle the armature is retained in the inoperative position by resilient restraining means, wherein the holding force of said restraining means is only a fraction of the saturation induction force of said electromagnet, wherein after overcoming said holding force said armature travels a major part of the armature stroke without transmitting any substantial forces to said valve member, wherein after traveling a major part of the armature stroke said armature impinges on said valve member at high speed and in so doing said armature moves said valve member in the direction of armature movement so that a substantial part of the work of opening said valve member is attained by the kinetic energy of said armature and of parts connected with said armature, and further characterized in that said valving member has a strong resetting spring of its own and itself serves as supplementary mass.

Claim 8

An electromagnetic valving assembly, comprising an electromagnet with armature and an armature-actuated valve member whose mass is much less than that of the armature and which is not fixedly connected with the armature so that the armature can exert a force on the valve member in one direction only, characterized in that before the start of an actuation cycle the armature is retained in the inoperative position by resilient restraining means, wherein the holding force of said restraining means is only a fraction of the saturation induction force of said electromagnet, wherein after overcoming said holding force said armature travels a major part of the armature stroke without transmitting any substantial forces to said valve member, wherein after traveling a major part of the armature stroke said armature impinges on said valve member at high speed and in so doing said armature moves said valve member in the direction of armature movement so that a substantial part of the work of opening said valve member is attained by the kinetic energy of said armature and of parts connected with said armature, and further characterized in that said valving member has a strong resetting spring of its own and itself serves as supplementary mass.

Claim 9

An electromagnetic valving assembly, comprising an electromagnet with armature and an armature-actuated valve member whose mass is much less than that of the armature and which is not fixedly connected with the armature so that the armature can exert a force on the valve member in one direction only, characterized in that before the start of an actuation cycle the armature is retained in the inoperative position by resilient restraining means, wherein the holding force of said restraining means is only a fraction of the saturation induction force of said electromagnet, wherein after overcoming said holding force said armature travels a major part of the armature stroke without transmitting any substantial forces to said valve member, wherein after traveling a major part of the armature stroke said armature impinges on said valve member at high speed and in so doing said armature moves said valve member in the direction of armature movement so that a substantial part of the work of opening said valve member is attained by the kinetic energy of said armature and of parts connected with said armature, and wherein said armature comprises abutment surface means moveable in unison therewith, characterized in that the abutting gap resulting when said armature is in its inoperative position is defined by juxtaposed surface means of an area as large as possible so that a hydraulic end-position damping results upon said armature reaching its end stroke position.

Claim 10

An electromagnetic valving assembly, comprising an electromagnet with armature and an armature-actuated valve member whose mass is much less than that of the armature and which is not fixedly connected with the armature so that the armature can exert a force on the valve member in one direction only, characterized in that before the start of an actuation cycle the armature is retained in the inoperative position by resilient restraining means, wherein the holding force of said restraining means is only a fraction of the saturation induction force of said electromagnet, wherein after overcoming said holding force said armature travels a major part of the armature stroke without transmitting any substantial forces to said valve member, wherein after traveling a major part of the armature stroke said armature impinges on said valve member at high speed and in so doing said armature moves said valve member in the direction of armature movement so that a substantial part of the work of opening said valve member is attained by the kinetic energy of said armature and of parts connected with said armature, and wherein said armature comprises abutment surface means moveable in unison therewith, characterized in that the abutting gap resulting when said armature is in its inoperative position is defined by juxtaposed surface means of an area as large as possible so that a hydraulic end-position damping results upon said armature reaching its end stroke position.

Claim 11

An electromagnetic injection valve, in particular for the injection of fuel into the suction pipe or into the combustion chamber of internal combustion engines, comprising an electromagnet with armature and an armature-actuated valving member, abutting surfaces existing between the moving parts and the stationary parts for the transmission of forces and a relative movement of the abutting surfaces occurring in which narrow gaps are formed in which fuel is present at least intermittently, characterized in that, with the gap closed and with the abutting surfaces lying one on top of the other, a certain free cross-section remains which permits a largely uninterrupted inflow of fuel, characterized in that one of said abutting surfaces is flat and the other being beveled with an angle of less than 1°.

Claim 12

An electromagnetic injection valve, in particular for the injection of fuel into the suction pipe or into the combustion chamber of internal combustion engines, comprising an electromagnet with armature and an armature-actuated valving member, abutting surfaces existing between the moving parts and the stationary parts for the transmission of forces and a relative movement of the abutting surfaces occurring in which narrow gaps are formed in which fuel is present at least intermittently, characterized in that, with the gap closed and with the abutting surfaces lying one on top of the other, a certain free cross-section remains which permits a largely uninterrupted inflow of fuel, characterized in that one of said abutting surfaces is flat and the other being beveled with an angle of less than 1°.

Claim 13

An electromagnetic injection valve assembly, in particular for injecting fuel into the suction pipe or into the combustion chamber of internal combustion engines, comprising an electromagnet with armature and with a valving member actuated by the armature, characterized in that, for damping the hydrodynamic oscillations, a hose-like elastic damping body concentrically embraces the inflow cross-section to the valving member in the immediate vicinity thereof.

Claim 14

An electromagnetic injection valve assembly, in particular for injecting fuel into the suction pipe or into the combustion chamber of internal combustion engines, comprising an electromagnet with armature and with a valving member actuated by the armature, characterized in that, for damping the hydrodynamic oscillations, a hose-like elastic damping body concentrically embraces the inflow cross-section to the valving member in the immediate vicinity thereof.

Claim 15

An electromagnetic injection valve assembly according to claim 8 and further comprising a cavity formed in said valve assembly, and wherein said hose-like damping body serves to close-off said cavity as to maintain said cavity devoid of fuel.

Claim 16

An electromagnetic injection valve assembly according to claim 9 and further comprising electrically energizable field coil means, coil former means upon which said field coil means is carried, and wherein said cavity is disposed directly in the coil former means.

Claim 17

An electromagnetic injection valve assembly according to claim 9 wherein said cavity is situated outwardly of said hose-like damping body and juxtaposed thereto.

Claim 18

An electromagnetic injection valve having a rotationally-symmetrical electromagnet with an electrically energizable field coil contained by a jacket defining a magnetic circuit and an armature which actuates a valving member, or itself serves as a valving member, said jacket comprising a generally cylindrical wall circumscribing said field coil, wherein the armature is guided in an axial direction in a guide which limits radial play, and wherein said jacket of the magnetic circuit has a plurality of openings formed radially through said cylindrical wall.

Claim 19

An electromagnetic injection valve having a rotationally-symmetrical electromagnet with an electrically energizable field coil contained by a jacket defining a magnetic circuit and an armature which actuates a valving member, or itself serves as a valving member, said jacket comprising a generally cylindrical wall circumscribing said field coil, wherein the armature is guided in an axial direction in a guide which limits radial play, and wherein said jacket of the magnetic circuit has a plurality of openings formed radially through said cylindrical wall.

Claim 20

An electromagnetic injection valve assembly, in particular for injecting fuel into the suction pipe or into the combustion chamber of internal combustion engines, comprising an electromagnet with armature and with a valving member actuated by the armature and an inflow portion leading to said valving member, characterized in that, for damping the hydrodynamic oscillations, a hose-like elastic body is itself embraced within the cross-section of said inflow portion.

Claim 21

An electromagnetic injection valve assembly, in particular for injecting fuel into the suction pipe or into the combustion chamber of internal combustion engines, comprising an electromagnet with armature and with a valving member actuated by the armature and an inflow portion leading to said valving member, characterized in that, for damping the hydrodynamic oscillations, a hose-like elastic body is itself embraced within the cross-section of said inflow portion.

Claim 22

An electromagnetic device, comprising electrically energizable coil means formed about and extending along a central axis, body means embracing at least a major portion of said energizable coil means, wherein said body means comprises pole piece means extending along and aligned with said central axis, wherein said pole piece means is comprised of composite material, and wherein said composite material comprises a powder of soft magnetic material embedded in a plastic material.

Claim 23

An electromagnetic device, comprising electrically energizable coil means formed about and extending along a central axis, body means embracing at least a major portion of said energizable coil means, wherein said body means comprises pole piece means extending along and aligned with said central axis, wherein said pole piece means is comprised of composite material, and wherein said composite material comprises a powder of soft magnetic material embedded in a plastic material.

Claim 24

An electromagnetic device according to claim 14 wherein said body means comprises annular wall means circumscribing said coil means, and wherein said wall means is comprised of said composite material.

Claim 25

An electromagnetic device according to claim 14 wherein said pole piece means comprises flange means extending transversely of said central axis, and wherein said flange means is comprised of said composite material.

Claim 26

An electromagnetic device having electrically energizable coil means and magnetic material and operated by a rapidly changing electric current in said coil means, wherein the flux path of the flux created by said coil means is defined at least partly by a compound material, wherein said compound material comprises a ferromagnetic powder having a high saturation induction, wherein said compound material comprises an electrical insulating medium, wherein said ferromagnetic powder is firmly embedded in said insulating medium, and wherein said embedded ferromagnetic powder and insulating medium as a compound is directly pressed around and against said coil means.

Claim 27

An electromagnetic device having electrically energizable coil means and magnetic material and operated by a rapidly changing electric current in said coil means, wherein the flux path of the flux created by said coil means is defined at least partly by a compound material, wherein said compound material comprises a ferromagnetic powder having a high saturation induction, wherein said compound material comprises an electrical insulating medium, wherein said ferromagnetic powder is firmly embedded in said insulating medium, and wherein said embedded ferromagnetic powder and insulating medium as a compound is directly pressed around and against said coil means.

Claim 28

An electromagnetic device, comprising energizable coil means formed about and extending along a central axis, pole piece means, armature means movable toward said pole piece means upon energization of said coil means, a guide member fixedly secured to said armature means as to be aligned with said central axis and movable in unison with said armature means, wherein said guide member and said armature means are respectively formed of different materials, wherein said armature means is comprised of composite material, and wherein said composite material comprises a powder of soft magnetic material embedded in a plastic material.

Claim 29

An electromagnetic device, comprising energizable coil means formed about and extending along a central axis, pole piece means, armature means movable toward said pole piece means upon energization of said coil means, a guide member fixedly secured to said armature means as to be aligned with said central axis and movable in unison with said armature means, wherein said guide member and said armature means are respectively formed of different materials, wherein said armature means is comprised of composite material, and wherein said composite material comprises a powder of soft magnetic material embedded in a plastic material.

Claim 30

An electromagnetic device according to claim 18 wherein said armature means comprises centrally situated passage means, and wherein said member is at least partly received in said passage means.

Claim 31

An electromagnetic device according to claim 18 wherein said member comprises a generally tubular cylindrical configuration extending along said central axis.

Claim 32

An electromagnetic device according to claim 19 wherein said member comprises a generally tubular cylindrical configuration extending along said central axis, and wherein said member is fixedly secured to said armature means by having said composite material mechanically pressed operatively against and about said member.

Claim 33

An electromagnetic device, comprising electrically energizable coil means formed about and extending along a central axis, pole piece means, armature means movable toward said pole piece means upon energization of said coil means, bobbin means, wherein said bobbin means is comprised of ceramic material, said coil means being formed directly onto said ceramic bobbin means, and wherein said coil means is under mechanical tension and exerting force radially directed toward said central axis and said ceramic bobbin means.

Claim 34

An electromagnetic device, comprising electrically energizable coil means formed about and extending along a central axis, pole piece means, armature means movable toward said pole piece means upon energization of said coil means, bobbin means, wherein said bobbin means is comprised of ceramic material, said coil means being formed directly onto said ceramic bobbin means, and wherein said coil means is under mechanical tension and exerting force radially directed toward said central axis and said ceramic bobbin means.

Claim 35

An electromagnetic device according to claim 22 wherein said coil means is formed of electrically conductive foil.

Claim 36

An electromagnetic device according to claim 22 and further comprising strength reinforcing support structure operatively engaging said ceramic material.

Claim 37

An electromagnetic device according to claim 24 wherein said strength reinforcing support structure comprises metal material.

Claim 38

An electromagnetic device according to claim 24 wherein said strength reinforcing support structure comprises soft magnetic material.

Claim 39

An electromagnetic valving assembly for rapidly pulsing or cycling a fluid flow, comprising stationary magnetic body means, said magnetic body means being formed as to have an axis of revolution, pole piece means situated as to be centrally of said magnetic body means, electrical coil means, armature means, wherein said pole piece means comprises magnetic material, pole piece end face means formed at an end of said pole piece means closest to said armature means and during operation of said valving assembly being of fixed location and thereby defining stationary surface means, said pole piece end face means being formed of said magnetic material and formed about said axis of revolution, said electrical coil means being effective upon energization thereof to create a magnetic flux field, said armature means comprising abutment surface means for cyclically abutting against said pole piece end face means, said abutment surface means being movable during operation of said valving assembly and thereby defining movable surface means, said armature means being moved into direct contact with said magnetic material of said end face means upon energization of said coil means thereby causing engagement between said stationary surface means and said movable surface means and at that time permitting the flow of said fluid, and wherein when said movable surface means is in abutting engagement with said stationary surface means a certain free cross-sectional area remains which permits a largely uninterrupted inflow of said fluid toward the area of contact between said movable and stationary surface means.

Claim 40

An electromagnetic valving assembly for rapidly pulsing or cycling a fluid flow, comprising stationary magnetic body means, said magnetic body means being formed as to have an axis of revolution, pole piece means situated as to be centrally of said magnetic body means, electrical coil means, armature means, wherein said pole piece means comprises magnetic material, pole piece end face means formed at an end of said pole piece means closest to said armature means and during operation of said valving assembly being of fixed location and thereby defining stationary surface means, said pole piece end face means being formed of said magnetic material and formed about said axis of revolution, said electrical coil means being effective upon energization thereof to create a magnetic flux field, said armature means comprising abutment surface means for cyclically abutting against said pole piece end face means, said abutment surface means being movable during operation of said valving assembly and thereby defining movable surface means, said armature means being moved into direct contact with said magnetic material of said end face means upon energization of said coil means thereby causing engagement between said stationary surface means and said movable surface means and at that time permitting the flow of said fluid, and wherein when said movable surface means is in abutting engagement with said stationary surface means a certain free cross-sectional area remains which permits a largely uninterrupted inflow of said fluid toward the area of contact between said movable and stationary surface means.