JPH068762U - Laminated armature - Google Patents

Abstract

(57) [Abstract] [Purpose] In an electronic control unit injector that uses a laminated armature, suppresses eddy currents that occur at the start and end of energization of the solenoid, and improves the rising response of the poppet valve at the start of energization. Another object of the present invention is to provide a laminated armature capable of improving the seat force of the poppet valve when the poppet valve is at the top dead center position. [Structure] Laminated plates 17 are arranged on both sides with a solid core 16 sandwiched therebetween, and they are integrally fastened together by a laminated plate fixing bolt 18 and a laminated plate fixing nut 19 to form a laminated plate 1
A laminated armature arranged such that the laminating direction of 7 is perpendicular to the central axis of the poppet valve.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a laminated armature, and more particularly to a laminated armature used for an electronic control unit injector of a diesel engine.

[0002]

[Prior art]

 As shown in FIGS. 6 and 7, the conventional laminated armature is constructed by laminating a large number of laminated plates 17 in one direction. Such a laminated armature is generally effective in suppressing eddy currents.

FIG. 8 is a diagram showing a structure around a solenoid valve of a conventional electronic control unit injector using such a laminated armature. In FIG. 8, 1'is a laminated armature, 2 is a poppet valve, 4 is a core, 5 is a return spring, 6 is an armature chamber interior, 7 is a valve stopper, 8 is an injector body, 9 is a fuel supply port, 10 is A high pressure fuel communication passage, 11 is a fuel drain hole, 12 is an exhaust fuel communication passage, 13 is a spacer, 14 is a solenoid, and 15 is a solenoid outer shell resin. The laminated armature 1 ′ is arranged so that the laminating direction of the laminated plate 17 is the same as the central axis of the poppet valve 2.

In FIG. 8, when a current flows through the solenoid 14, an attractive force due to magnetic force acts between the core 4 and the armature 1 ′, overcoming the reaction force of the return spring 5 and the armature 1 ′ works upward. At this time, in the configuration of FIG. 8, the magnetic lines of force 20 that generate the attraction force and the laminated plate 17 are orthogonal to each other as shown in FIG. 9, and must pass through the boundary surface of the laminated plates 17 of multiple layers. Therefore, the rising response of the poppet valve 2 was deteriorated.

Further, even when the poppet valve 2 is sucked and is at the top dead center position, since the laminating direction of the laminated plate 17 is the same direction as the central axis of the poppet valve 1, the magnetic force lines 20 cause the boundary of the laminated plate 17 to move. Since it passes through the surface, it becomes a magnetic resistance, which deteriorates the suction efficiency and reduces the seat force of the poppet valve 1.

Further, at the end of energization of the solenoid, since the laminating direction of the laminating plate 17 is the same as the central axis of the poppet valve 1, the traveling direction of the magnetic force lines 20 as shown in FIG. Since the boundary surface of the laminated plate 17 exists in the above, the laminated structure was not effective in suppressing the eddy current 21.

[0007]

[Problems to be solved by the device]

 As described above, since the stacking direction of the conventional stacking armature is the same as the central axis of the poppet valve, the magnetic lines of force that generate the suction force are orthogonal to the stacking plate, and the vortices that are generated at the start and end of energization of solenoid If the stacking direction is the same as the central axis of the poppet valve at the start of energization of the solenoid, the magnetic field lines near the adsorption surface will pass through the laminated plate, resulting in a magnetic resistance. As a result, the responsiveness of the poppet valve when it rises is deteriorated, and even when the poppet valve is sucked and is at the top dead center position, the laminating direction of the armature laminate plate is in the same direction as the central axis of the poppet valve. As a result, the lines of magnetic force that generate the suction force are in a state of passing through the boundary surface of multiple layers of laminated plates, which creates magnetic resistance and deteriorates the suction force, reducing the poppet valve seat force. There is a problem that that.

Therefore, in the present invention, in the electronic control unit injector using the laminated armature, the eddy current generated at the start and end of energization of the solenoid is suppressed, and the rising response of the poppet valve at the start of energization is improved. It is also an object of the present invention to provide a laminated armature capable of improving the seat force of the poppet valve when the poppet valve is at the top dead center position.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is composed of laminated plates, and in a laminated armature having a rectangular cross section used for an electronically controlled unit injector, the laminated plate is used as a central axis of a poppet valve in an electronically controlled unit injector. It is characterized in that they are laminated in a direction perpendicular to.

[0010]

[Action]

 If the lamination direction of the laminated plates that make up the laminated armature is perpendicular to the center axis of the poppet valve, the magnetic resistance will be small because the boundary surface of the laminated plates does not exist in the direction of the magnetic force lines when the solenoid is energized. , The poppet valve rising characteristic is improved.

Further, even when the poppet valve is completely sucked and is at the top dead center position, since the boundary surface of the laminated plates does not exist in the traveling direction of the magnetic force lines and the magnetic resistance is small, the suction efficiency is increased. .

[0012] Furthermore, at the end of energization of the solenoid, since there is no boundary interface between the laminated plates in the traveling direction of the magnetic force lines, the laminated structure functions to suppress the eddy current, so that the falling response of the poppet valve is reduced. Sex is improved.

[0013]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a laminated armature according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. 3 is a sectional view showing a structure around an electromagnetic valve of an electronic control unit injector incorporating the laminated armature shown in FIGS. 1 and 2.

In FIGS. 1, 2 and 3, 1 is a laminated armature, 2 is a poppet valve, 4 is a core, 5 is a return spring, 6 is an inside of an armature chamber, 7 is a valve stopper, 8 is an injector body, and 9 is Fuel supply port, 10 is a high pressure fuel communication passage, 11 is a fuel drain hole, 12 is an exhaust fuel communication passage, 13 is a spacer, 14 is a solenoid, 15 is a solenoid outer shell resin, 16 is a solid core, 17 is a laminated plate, 18 is a laminated plate fixing bolt, and 19 is a laminated plate fixing nut.

As shown in FIG. 1 and FIG. 2, the laminated armature 1 has laminated plates 17 on both sides with a solid core 16 sandwiched therebetween, and these are fixed by a laminated plate fixing bolt 18 and a laminated plate fixing nut 19. Is fixed together.

The solid core 16 is for avoiding a partially laminated structure so that the laminated armature 1 can be firmly tightened with screws or bolts when the laminated armature 1 is attached to the poppet valve 2. The poppet valve insertion hole 16a into which 2 is inserted is opened. The laminated plates 17 are laminated so that the laminating direction is perpendicular to the central axis of the poppet valve 2 and the boundary face of the laminated plates 17 does not exist in the traveling direction of the magnetic force lines. The solid core 16 is arranged on both sides of the solid core 16, and the solid core 16 and the solid core 16 are fastened together by a laminated plate fixing bolt 18 and a laminated plate fixing nut 19 to be integrated. For fixing the laminated plate 17 to the solid core 16, it is possible to use an adhesive agent, spot welding, or the like in addition to the above-described fixing method by co-tightening using bolts and nuts.

Next, the operation of the electronic control unit injector incorporating the above-mentioned laminated armature will be described. FIG. 4 is a diagram showing a state of magnetic force lines generated in the laminated armature 1 and the solenoid 14, and FIG. 5 is a diagram showing a state of magnetic force lines penetrating the attraction surface of the laminated armature 1 and eddy currents generated thereby.

In FIG. 3, when a current flows through the solenoid 14, an attractive force due to a magnetic force acts between the core 4 and the armature 1 to overcome the reaction force of the return spring 5 and the armature 1 works upward.

At this time, in the conventional laminated armature 1 ′, as shown in FIG. 9, the magnetic lines of force 20 pass through the boundary surface of the laminated plate 17 and thus become a magnetic resistance, but the laminated armature 1 according to the present invention. Since there is no boundary surface of the laminated plate 17 in the traveling direction of the magnetic force lines 20 as shown in FIG. 4, the magnetic resistance is much smaller than that of the conventional laminated armature 1 '. Therefore, the rising responsiveness of the poppet valve 2 when the energization of the solenoid 14 is started is improved.

Further, even when the poppet valve 2 is completely sucked and is at the top dead center position, in the conventional laminated armature 1 ′, the laminating direction of the laminated plates is the same as the central axis of the poppet valve 1, Similarly to the above, the magnetic lines of force 20 passing through the boundary surface of the laminated plate 17 cause a magnetic resistance, which deteriorates the suction efficiency and reduces the seat force of the poppet valve 1. On the other hand, in the laminated armature 1 according to the present invention, since the boundary surface of the laminated plate 17 does not exist in the traveling direction of the magnetic force lines 20, the magnetic resistance is smaller than that of the conventional laminated armature 1'and the attraction efficiency is lower than that of the conventional laminated armature 1. It is higher than ′.

Furthermore, when the energization of the solenoid 14 is completed, in the conventional laminated armature 1 ′, since the laminating direction of the laminating plate 17 is the same as the central axis of the poppet valve 1, the magnetic force lines 20 as shown in FIG. The boundary surface of the laminated plate 17 was present in the traveling direction of, and the laminated structure had no effect on the suppression of the eddy current 21. On the other hand, in the laminated armature 1 according to the present invention, since the boundary surface of the laminated plate 17 does not exist in the traveling direction of the magnetic force lines 20, the laminated structure has a vortex at the end of energization of the solenoid 14 as shown in FIG. It functions to suppress the current 21. As a result, the falling response of the poppet valve 1 at the end of energization of the solenoid 14 is improved.

[0022]

[Effect of device]

 According to the present invention, the following effects can be obtained by stacking the laminated plates in the laminated armature in the electronic control unit injector in the direction perpendicular to the central axis of the poppet valve.

When a current flows through the solenoid and an attractive force is exerted by the magnetic force, and the armature moves upward, there is no boundary surface between the laminated plates in the traveling direction of the magnetic force lines, so the magnetic resistance is smaller than that of the conventional laminated armature. As a result, the responsiveness of the poppet valve rising at the start of energization of the solenoid is improved.

Further, even when the poppet valve is completely sucked and is at the top dead center position, since the laminating direction of the laminated plate does not exist in the traveling direction of the magnetic force lines, the magnetic resistance becomes smaller than that of the conventional laminated armature, and the suction is reduced. Higher efficiency.

Further, at the end of energization of the solenoid, since there is no boundary surface of the laminated plates in the traveling direction of the magnetic force lines, it functions to suppress the eddy current, so the poppet falling response at the end of energization of the solenoid is improved. It

[Brief description of drawings]

FIG. 1 is a perspective view of a laminated armature according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the laminated armature shown in FIG.

3 is a cross-sectional view showing a configuration around an electromagnetic valve of an electronic control unit incorporating the laminated armature of FIG.

FIG. 4 is a cross-sectional view showing a state of magnetic force lines generated in the laminated armature and the solenoid in FIG.

5 is a schematic diagram showing a state of magnetic force lines penetrating the attraction surface of the laminated armature in FIG. 3 and eddy currents generated thereby.

FIG. 6 is a perspective view of a conventional laminated armature.

FIG. 7 is an exploded perspective view of the laminated armature of FIG.

8 is a cross-sectional view showing a configuration around a solenoid valve of an electronic control unit incorporating the laminated armature of FIG.

9 is a cross-sectional view showing a state of magnetic force lines generated in the laminated armature and the solenoid in FIG.

10 is a schematic diagram showing a state of magnetic force lines penetrating the attraction surface of the laminated armature in FIG. 8 and eddy currents generated thereby.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Laminated armature 2 ... Poppet valve 4 ... Core 5 ... Return spring 6 ... Armature chamber interior 7 ... Valve stopper 8 ... Injector body 9 ... Fuel supply port 10 ... High pressure fuel passage 11 ... Fuel drain hole 12 ... Exhaust fuel passage 13 ... Spacer 14 ... Solenoid 15 ... Solenoid shell resin 16 ... Solid core 17 ... Laminated plate 18 ... Laminated plate fixing bolt 19 ... Laminated plate fixing nut 20 ... Magnetic field line 21 ... Eddy current

Claims (1)

[Scope of utility model registration request] 1. A laminated armature having a rectangular cross-section used for an electronic control unit injector, the laminated plate being laminated in a direction perpendicular to a central axis of a poppet valve in the electronic control unit injector. A laminated armature characterized in that.