JP5025195B2 - Solenoid valve device for engine - Google Patents

Description

  The present invention relates to an electromagnetic valve device for an engine that opens and closes a valve with an armature that is alternately attracted and swung by a first electromagnet and a second electromagnet.

An upper disc (amateur) and a lower disc (with a distal end connected to the drive valve and a base end pivotally supported on a disc base that is movable in a direction perpendicular to the opening / closing direction of the drive valve provided in the cylinder head of the engine Amateur), electromagnets arranged inside both disks, and a pair of permanent magnets arranged outside both disks, and controlling the energization of the electromagnets to turn both disks alternately into electromagnets and permanent magnets Patent Document 1 listed below discloses a drive valve that opens and closes by adsorbing and reciprocatingly swinging, and changes the lift amount of the drive valve by moving the disk base with an actuator to change the lever ratio of both disks. Is known.
JP 2006-22776 A

  By the way, in the above-mentioned conventional one, it is necessary to move a disk base supporting one electromagnet, two permanent magnets and two disks (amateurs) with an actuator, so that the whole electromagnetic valve device is enlarged. There has been a problem that a large restriction occurs in the narrow space in the cylinder head of the engine.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to reduce the size of an electromagnetic valve device that opens and closes a valve with an arbitrary lift amount by an electromagnet.

To achieve the above object, according to the first aspect of the present invention, there is provided an armature having one end pivotably supported by the engine body and the other end abutting against a valve stem, and a first armature of the armature. A first electromagnet capable of attracting the attracting surface and a second electromagnet capable of attracting the second attracting surface of the amateur, and opening and closing the valve by alternately attracting the amateur by the first electromagnet and the second electromagnet the electromagnetic valve operating device for an engine that drives the first, one of the electromagnets of the second electromagnet, the position with respect to the engine body is swingably supported around a fixed shaft fixed Rutotomoni, the one end of the armature is pivotally supported on the engine body via the fixed shaft, the first, the other electromagnet of the second electromagnet, the fixed part is provided for fixing the fixing shaft, wherein The square of the electromagnet, the actuator, the engine body above the fixed shaft are separately configured to the one of the electromagnets the configured separately and independently forcibly swinging the one of the electromagnets said about the fixed shaft And a control shaft that is supported by the control shaft and the one electromagnet so that the one electromagnet is reciprocally swung around the fixed shaft according to the reciprocating rotation of the control shaft. An electromagnetic valve device for an engine is proposed, which is interlocked and connected via a link .

  According to the invention described in claim 2, in addition to the structure of claim 1, the one electromagnet causes the valve to lift and regulates the lift amount of the valve. An electromagnetic valve device is proposed.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the spring further includes a pair of valve springs that bias the armature to a neutral position, and supports one of the valve springs. There is proposed an electromagnetic valve operating system for an engine, wherein a seat is fixed to the engine body, and a spring seat supporting the other valve spring moves in accordance with the swing of the one electromagnet.

According to a fourth aspect of the invention, in addition to the configuration of the third aspect, the other valve spring and the spring seat supporting the valve spring are disposed on the outer periphery of the stem of the valve, and the spring sheets electromagnetic valve operating system for an engine, characterized in that moving is integrally coupled to the one electromagnet Ru been proposed.

  The cylinder head 12 and the head cover 13 of the embodiment correspond to the engine body of the present invention, the intake valve 17 of the embodiment corresponds to the valve of the present invention, and the first electromagnet 21 of the embodiment corresponds to the present invention. Corresponding to the other electromagnet, the second electromagnet 22 of the embodiment corresponds to one electromagnet of the present invention, the inner block member 27 of the embodiment corresponds to the fixing portion of the present invention, and the first of the embodiment. The valve spring 47 and the second valve spring 51 correspond to the valve spring of the present invention.

According to the first aspect of the present invention, the first suction surface of the armature and the first suction surface are pivotally supported around one fixed shaft whose position is fixed with respect to the engine body and the other end contacts the stem of the valve. 2 suction surface first, since the adsorption respectively second electromagnets, first, it is possible to arbitrarily change the lift amount of the valve by oscillating the hand with the actuator of the second electromagnet. The first, if to swing only hand of the second electromagnet may, in addition, it is not necessary to move the position of the armature, it is possible to constitute an electromagnetic valve operating system compact. In particular, since the one electromagnet is swung to change the lift amount of the valve, the electromagnetic valve device can be made compact in the axial direction of the valve.

In addition, since one of the electromagnets and the armature is pivotally supported on the same fixed shaft, even if the one electromagnet swings, the positional relationship with the amateur attracted to the electromagnet is the same, and the electromagnet and the armature The suction surface can be easily managed. Furthermore, since the fixing portion for fixing the fixed shaft to the other electromagnet is provided, the positional relationship between the other electromagnet and the amateur is stabilized, and the management of the adsorption surface of the other electromagnet and the amateur is facilitated, There is no need to separately secure a member for providing the fixed shaft.

  According to the second aspect of the present invention, since the valve is lifted by the swinging electromagnet and the lift amount of the valve is regulated, not only the valve can be opened reliably, but also the collision sound when the valve is closed. The lift amount of the valve can be changed while suppressing the deterioration of the valve.

  According to the configuration of claim 3, of the pair of valve springs that bias the amateur to the neutral position, the spring seat that supports one valve spring is fixed to the engine body, and the spring seat that supports the other valve spring. Is moved in accordance with the swing of the one electromagnet, so that the neutral position of the amateur is prevented from being significantly shifted even if the engine is stopped when the one electromagnet is in any swing position. Sometimes the armature can be reliably attracted to the first electromagnet or the second electromagnet.

According to the configuration of claim 4, since the other valve spring and the spring seat supporting the valve spring are arranged on the outer periphery of the stem of the valve, not only can the electromagnetic valve device be made compact, since the spring seat is moved in response to the swinging of the integrally linked with the one of the electromagnets to the one of the electromagnets, Ru can be biased to ensure the neutral position amateur.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 6 show an embodiment of the present invention. FIG. 1 is a sectional view of a cylinder head of an engine equipped with an electromagnetic valve device, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. FIG. 4 is an exploded perspective view of the swing drive unit of the second electromagnet, FIG. 5 is an explanatory diagram of the action during a low lift and a high lift (neutral state), and FIG. It is action explanatory drawing at the time of high lift (maximum lift state).

  As shown in FIG. 1, a cylinder head 12 is coupled to the top surface of the cylinder block 11 of the engine, and a head cover 13 is coupled to the top surface of the cylinder head 12. An intake port 14 is formed in the cylinder head 12, and an intake valve 17 that opens and closes a valve hole 16 that the intake port 14 opens into the combustion chamber 15 has a stem 18 that can slide on a valve guide 19 provided in the cylinder head 12. Guided by

  As shown in FIGS. 1 to 4, an electromagnetic valve device 20 that opens and closes a pair of intake valves 17 at the same timing and the same lift amount includes a pair of first electromagnets 21, a pair of second electromagnets 22, and a pair of The armature 23 and a pair of urging rods 24 are provided.

  The first electromagnet 21 includes a core 25 in which a large number of steel plates are laminated, a pair of coils 26 wound around four coil grooves 25 a formed in the core 25, and an inner block member 27 stacked on the inner end of the core 25. And an outer block member 28 superimposed on the outer end of the core 25, and the inner block member 27, the core 25 and the outer block member 28 are integrally fastened by four bolts 29. The three mounting arms 27a of the inner block member 27 are fastened to the mounting portion 12a of the cylinder head 12 by bolts 30, respectively, and the three mounting arms 28a of the outer block member 28 are fastened to the mounting portions 12b of the cylinder head 12 by bolts 31, respectively. As a result, the first electromagnet 21 is fixed to the cylinder head 12.

  The second electromagnet 22 includes a core 32 in which a large number of steel plates are laminated, a pair of coils 33 wound around four coil grooves 32 a formed in the core 32, and an inner block member 34 that is overlapped on the inner end of the core 32. And an outer block member 35 superimposed on the outer end of the core 32, and the inner block member 34, the core 32, and the outer block member 35 are integrally fastened by four bolts 36. The inner block member 34 is provided with two hinge arms 34a and two link arms 34b, and the outer block member 35 is provided with three spring seat support arms 35a.

  The amateur 23 is a plate-like member, and two hinge arms 23a are provided at the inner end, and two rollers 37 are rotatably supported at the outer end. The fixed shaft 38 is press-fitted into the three mounting arms 27 a of the inner block member 27 of the first electromagnet 21, and the two hinge arms 23 a of the armature 23 and the inner block of the second electromagnet 22 are arranged on the outer periphery of the fixed shaft 38. Two hinge arms 34a of the member 34 are fitted so as to be relatively rotatable. Therefore, the armature 23 and the second electromagnet 22 are pivotally supported around the fixed shaft 38 so that they can swing independently of each other. The fixed shaft 38 means that the position does not move with respect to the cylinder head 11 and may rotate at the same position.

  Two link arms 39 a provided on a control shaft 39 rotatably supported by the cylinder head 12 and two link arms 34 b of the inner block member 34 of the second electromagnet 22 are respectively connected to both ends of the control link 40. It is pivoted at 41,42. Accordingly, when the control shaft 39 is reciprocally rotated by the actuator 43 such as an electric motor, the second electromagnet 22 swings around the fixed shaft 38 via the control link 40.

  A cylindrical spring seat 44 is slidably fitted in a guide recess 12 c formed coaxially with the intake valve 17 in the cylinder head 12, and a pin 45 provided on the spring seat 44 is an outer block of the second electromagnet 22. The member 35 engages with a long hole 35b provided at the tip of the spring seat support arm 35a. Therefore, when the second electromagnet 22 swings, the spring seat 44 moves up and down along the guide recess 12c. The reason why the long hole 35b is engaged with the pin 45 provided on the spring seat support arm 35a is that the spring seat support arm 35a of the outer block member 35 swings around the fixed shaft 38, while the spring seat This is because 44 is linearly moved along the guide recess 12c.

  A first valve spring 47 is contracted between the spring seat 46 provided at the upper end of the stem 18 of the intake valve 17 and the spring seat 44. The first valve spring 47 urges the intake valve 17 in the valve closing direction (upward), and the upper end of the stem 18 of the intake valve 17 contacts the roller 37 of the armature 23 by the urging force.

  The urging rod 24 disposed coaxially with the stem 18 of the intake valve 17 is slidably supported by a rod guide 48 provided on the support portion 13 a of the head cover 13. A second valve spring 51 is contracted between a spring seat 49 formed integrally with the rod guide 48 and a spring seat 50 provided below the biasing rod 24, and is biased downward by the second valve spring 51. The lower end of the biasing rod 24 comes into contact with the roller 37 of the armature 23. A hydraulic buffer mechanism 52 that buffers an impact when the intake valve 17 is seated is provided above the rod guide 48.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  When the second electromagnet 22 is swung around the fixed shaft 38 by the actuator 43 via the control shaft 39 and the control link 40, the bottom surface of the first electromagnet 21 fixed to the cylinder head 12 and the swung second electromagnet 22. The angle formed with the upper surface of the surface changes. 5A corresponds to the case where the angle α is small and the intake valve 17 is driven with a low lift amount, and FIG. 5B is the state where the angle β is large and the intake valve 17 is high. This corresponds to the case of driving with the lift amount.

  When the first and second electromagnets 21 and 22 are not excited, the armature 23 always has the first and second electromagnets 21 and 22 regardless of whether the second electromagnet 22 is in a low lift state or a high lift state. It stops at a substantially neutral position of the wedge-shaped space formed therebetween. The reason is as follows.

  In the low lift state, the armature 23 is pushed up by the stem 18 of the intake valve 17 biased upward by the first valve spring 47 and pushed down by the biasing rod 24 biased downward by the second valve spring 51. Then, it stops at the neutral position where the push-up force and the push-down force are balanced. In this neutral position, the resilience of the first and second valve springs 47 and 51 is adjusted so that the armature 23 stops approximately at the center between the first and second electromagnets 21 and 22.

  When the second electromagnet 22 is lowered from this state to the high lift state, the spring seat 44 supporting the lower end of the first valve spring 47 is lowered together with the second electromagnet 22, so that the first and second valve springs 47, 51 are Stretch evenly. As a result, the armature 23 swings downward from the low lift state and stops at the neutral position in the middle of the space between the first and second electromagnets 21 and 22 even in the high lift state.

  Assuming that the lower end of the first valve spring 47 is supported by the cylinder head 12 so as not to move, even if the second electromagnet 22 swings downward in the high lift state, the armature 23 does not move from the position of the low lift state. However, there is a problem that the clearance between the amateur 23 and the second electromagnet 22 becomes larger than the clearance between the amateur 23 and the first electromagnet 21.

  Thus, if the armature 23 does not stop near the center between the first and second electromagnets 21 and 22 when the engine is stopped, the second electromagnet 22 is excited at the moment when the engine is started and the armature 23 is attracted. In the cylinder, a large attracting force is required for the second electromagnet 22 whose distance from the amateur 23 becomes large, and problems such as an increase in the size of the second electromagnet 22 and an increase in power consumption occur.

  On the other hand, in the present embodiment, the armature 23 is surely stopped substantially in the center between the first and second electromagnets 21 and 22 when the engine is stopped. Therefore, the first and second electromagnets 21 and 22 are started when the engine is started. In any case, no specially large suction force is required, so that the above-mentioned problem is solved.

  In addition, since the first valve spring 47 and the spring seat 44 are arranged on the outer periphery of the stem 18 of the intake valve 17, not only can the size be reduced, but the pin 45 and the elongated hole 35b are provided on the second electromagnet 22 with the spring seat 44. Therefore, the spring seat 44 can be moved according to the swing of the second electromagnet 22, and the armature 23 can be reliably urged to the neutral position regardless of the swing position of the second electromagnet 22.

  Thus, when the first electromagnet 21 is excited, the first attracting surface 23b of the armature 23 is attracted to the lower surface of the first electromagnet 21, so that the armature 23 swings upward around the fixed shaft 38, and the second valve The urging rod 24 is pushed up by the roller 37 while compressing the spring 51. At the same time, the intake valve 17 whose stem 18 is pushed up by the elastic force of the first valve spring 47 is seated in the valve hole 16 and is closed. In a state where the intake valve 17 is closed, the dimensional relationship of each part is set so that the first attracting surface 23 b of the armature 23 is in close contact with the lower surface of the first electromagnet 21. The impact at the moment when the intake valve 17 is seated in the valve hole 16 is buffered by a hydraulic buffer mechanism 52 that suppresses upward movement of the upper end of the urging rod 24.

  When the first electromagnet 21 is demagnetized from the closed state of the intake valve 17 and the second electromagnet 22 is excited, the second attracting surface 23 c of the armature 23 is attracted to the upper surface of the second electromagnet 22. Then, the armature 23 swings downward around the fixed shaft 38, and the intake valve 17 is opened by pushing down the stem 18 with the roller 37 while compressing the first valve spring 47. At this time, the urging rod 24 descends following the armature 23 by the elastic force of the second valve spring 51. When the second attracting surface 23c of the amateur 23 is in close contact with the upper surface of the second electromagnet 22, the lift amount of the intake valve 17 becomes the maximum lift amount, and as shown in FIG. It changes arbitrarily depending on the moving position.

  Since the second electromagnet 22 and the armature 23 swing around the common fixed shaft 38, the second attracting surface 23c of the armature 23 is in the low lift state of FIG. 6A and the high lift state of FIG. Can be brought into close contact with the upper surface of the second electromagnet 22, and the upper surface of the second electromagnet 22 and the second attracting surface 23c of the armature 23 can be easily managed. Further, since the fixed shaft 38 is provided on the first electromagnet 21 fixed to the cylinder head 11, it is not only necessary to secure a place for providing the fixed shaft 38 on the cylinder head 11, but also between the first electromagnet 21 and the armature 23. The positional relationship is stable, and management of the lower surface of the first electromagnet 21 and the first attracting surface 23b of the armature 23 is facilitated.

Thus, by changing the swing position of the second electromagnet 22, the maximum lift amount of the intake valve 17 can be arbitrarily changed, and the timing of excitation and demagnetization of the first and second electromagnets 21 and 22 can be changed. By changing this, the valve timing of the intake valve 17 can be arbitrarily changed. At this time, since it is only necessary to change the position of the second electromagnet 22 without changing the positions of the first electromagnet 21 and the armature 23, all of the first, second electromagnets 21, 22 and the armature 23 are moved. The electromagnetic valve device 20 can be configured more compactly than what is to be made. Moreover, since the first electromagnet 21 that regulates the valve closing position of the intake valve 17 is fixed so as not to move, the intake valve 17 can be seated with high accuracy.
The

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

For example, although in the embodiment the present invention is applied to the intake valve 17, Ru can apply it to the exhaust valve.

  In the embodiment, the pair of armatures 23 are driven at the same timing and lift amount, but the armatures 23 can be driven at different timings and lift amounts for each intake valve 17.

Cross-sectional view of an engine cylinder head equipped with an electromagnetic valve device 1 is an enlarged view of the main part of FIG. Disassembled perspective view of electromagnetic valve device The exploded perspective view of the rocking drive part of the 2nd electromagnet Action diagram during low lift and high lift (neutral state) Action explanation diagram at the time of low lift and high lift (maximum lift state)

12 Cylinder head (engine body)
13 Head cover (engine body)
17 Intake valve (valve)
18 stem 21 first electromagnet (the other electromagnet)
22 Second electromagnet (one electromagnet)
23 Amateur 23b 1st adsorption surface 23c 2nd adsorption surface 27 Inner block member (fixed part)
38 Fixed shaft
39 control shaft
40 control links
43 Actuator 44 Spring seat 47 First valve spring (valve spring)
49 Spring seat 51 Second valve spring (valve spring)

Claims (4)

An armature (23) whose one end is pivotally supported by the engine body (12) and the other end is in contact with the stem (18) of the valve (17), and a first suction surface (23b) of the armature (23) A first electromagnet (21) capable of adsorbing and a second electromagnet (22) capable of adsorbing the second adsorption surface (23c) of the amateur (23) , the first electromagnet (21) and the second electromagnet In the electromagnetic valve device for an engine for alternately opening and closing the valve (17) by alternately adsorbing the amateur (23) according to (22),
The first, one of the electromagnets of the second electromagnet (21, 22) (22), the position with respect to the engine body (12) is swingably supported by a fixed shaft (38) around which is fixed And the one end of the amateur (23) is pivotally supported by the engine body (12) via the fixed shaft (38),
The other electromagnet (21) of the first and second electromagnets (21, 22) is provided with a fixing portion (27) for fixing the fixing shaft (38),
The one electromagnet (22) includes an actuator (43) that is configured independently of the one electromagnet (22) and forcibly swings the one electromagnet (22) around the fixed shaft (38). ) Is configured separately from the fixed shaft (38) and is supported by the engine body (12) so as to be reciprocally rotatable, and the control shaft (39) and the one electromagnet (22). ) Respectively , and interlocked via a control link (40) that reciprocally swings the one electromagnet (22) around the fixed shaft (38) in response to the reciprocating rotation of the control shaft (39) . An electromagnetic valve device for an engine characterized by being coupled.   2. The electromagnetic valve operating apparatus for an engine according to claim 1, wherein the one electromagnet (21) causes the valve (17) to lift and regulates the lift amount of the valve (17).   A pair of valve springs (47, 51) for biasing the amateur (23) to a neutral position are provided, and a spring seat (49) supporting one of the valve springs (51) is fixed to the engine body (13), The engine electromagnetic according to claim 1 or 2, characterized in that the spring seat (44) supporting the other valve spring (47) moves in accordance with the swing of the one electromagnet (22). Valve operating device. The other valve spring (47) and the spring seat (44) supporting the valve spring (47) are arranged on the outer periphery of the stem (18) of the valve (17), and the spring seat (44) is arranged on the one side. and wherein the moving is integrally connected to the electromagnet (22), the electromagnetic valve operating equipment for an engine according to claim 3.

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