JP2003007532A - Electromagnetic drive unit for engine valve - Google Patents

Electromagnetic drive unit for engine valve

Info

Publication number
JP2003007532A
JP2003007532A JP2001183078A JP2001183078A JP2003007532A JP 2003007532 A JP2003007532 A JP 2003007532A JP 2001183078 A JP2001183078 A JP 2001183078A JP 2001183078 A JP2001183078 A JP 2001183078A JP 2003007532 A JP2003007532 A JP 2003007532A
Authority
JP
Japan
Prior art keywords
electromagnetic
engine valve
drive
power supply
valve
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.)
Pending
Application number
JP2001183078A
Other languages
Japanese (ja)
Inventor
Seinosuke Hara
Tatsuo Matsumura
Yoji Okada
誠之助 原
養二 岡田
達雄 松村
Original Assignee
Hitachi Unisia Automotive Ltd
株式会社日立ユニシアオートモティブ
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Unisia Automotive Ltd, 株式会社日立ユニシアオートモティブ filed Critical Hitachi Unisia Automotive Ltd
Priority to JP2001183078A priority Critical patent/JP2003007532A/en
Publication of JP2003007532A publication Critical patent/JP2003007532A/en
Application status is Pending legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342Oxides
    • H01F1/344Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4

Abstract

PROBLEM TO BE SOLVED: To use a low-capacity, inexpensive electromagnetic drive unit as a switching element for regenerating energy and improve change-over response of a current direction, in an electromagnetic device for engine valve that uses an induced electromotive force generated in an electromagnetic coil to regenerate energy. SOLUTION: Drive power supply of electromagnetic coils 10 and 11 is lowered in voltage to make a low potential Vlow, and when an induced electromotive force is generated in the electromagnetic coils 10 and 11 corresponding to the positional change of an engine valve, an FET 55 is turned on to make an induced current flow in a capacitor 56 on the low-potential Vlow side and charge it. Electric charge accumulated once in the capacitor 56 is boosted by a transformer 57 and returned to the drive power supply of the electromagnetic coils 10 and 11, and it is used to drive the electromagnetic coils 10 and 11.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic drive device having a structure in which an intake / exhaust valve, for example, an engine valve of an internal combustion engine for an automobile is opened and closed by an electromagnet and a permanent magnet. . 2. Description of the Related Art Conventionally, as this type of electromagnetic drive device,
For example, Japanese Patent Application Laid-Open No. 2000-283317 and
What is described in -131726 gazette is known. In the technique described in JP-A-2000-283317, an electromagnet that opens and closes an engine valve, a permanent magnet that holds the engine valve at an open position and a closed position, and the engine valve is set at a neutral position in the opening and closing direction. And a biasing spring member. For example, when the engine valve is driven from the valve closing position to the valve opening position, a reaction force against the magnetic attraction force of the permanent magnet is generated by the electromagnet to release the valve closing holding state by the permanent magnet. The engine valve is displaced to the valve opening position by the electromagnetic attraction force in the valve opening direction generated simultaneously with the reaction force and the spring force of the spring member, and the valve opening position is held by the attraction force by the permanent magnet. Further, in the configuration described in Japanese Patent Application Laid-Open No. 10-131726, a structure in which an electromagnetic force of an electromagnet is applied to a permanent magnet fixed to a stem portion of an engine valve to open and close the engine valve is used for gravity. When the engine valve is lowered by the return spring and an induced electromotive force is generated in the electromagnetic coil of the electromagnet, the induced electromotive force is boosted by a boost chopper circuit to charge a capacitor, and is discharged when the engine valve is lowered. It regenerates part of the energy. However, as described above, in the case where the induced electromotive force is boosted to a voltage higher than the power supply voltage of the electromagnet by the boosting chopper circuit, the boosting chopper circuit uses the boosting chopper circuit as a switching element or a diode. Therefore, it is necessary to use a capacitor having a large capacity corresponding to the above, and there is a problem that elements constituting the driving device become expensive. In addition, since the load side (electromagnetic coil side) is stepped up with respect to the power supply side by the above-described step-up chopper circuit, the power running current in the opposite direction is changed from the state where the induced current is flowing through the electromagnetic coil. When flowing the current, the switching response of the current direction is deteriorated. For example, when the engine valve is displaced by the inertial force and hits the stopper, when a powering current is temporarily applied to the electromagnet to suppress rebound and an electromagnetic attraction force is generated, if the switching response in the current direction is slow, the rebound There is a problem that the effect of suppressing the occurrence of odor is reduced. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides an engine that can use a relatively low-capacity and inexpensive element and that can switch the current direction from an induced current to a powering current with good response. It is an object to provide an electromagnetic drive for a valve. [0008] Therefore, the invention according to claim 1 is a structure in which an engine valve is driven to be opened and closed by an electromagnet and a permanent magnet. An electromagnetic drive device for an engine valve that performs energy regeneration using an induced electromotive force generated in an electromagnetic coil of the electromagnet in response to a displacement of the engine valve, wherein an induced current due to the induced electromotive force is lower than a drive power source for the electromagnet. The energy is regenerated by refluxing to a potential power supply. With this configuration, the induced current is not returned to the drive power supply for the electromagnet, but is returned to the power supply having a lower potential than the drive power supply, and the supply of the drive current to the electromagnetic coil is stopped. In this state, the energy generated in the electromagnetic coil is regenerated. According to the second aspect of the invention, after the induced current is returned to the low-potential power source, the induced current is boosted and returned to the driving power source. According to this configuration, after the energy is once recovered by the low potential power supply, the energy is boosted and returned to the drive power supply for the electromagnetic coil, and the recovered energy is used for the next drive of the electromagnetic coil. According to the third aspect of the present invention, the low-potential power supply is configured to be a power supply that supplies power to engine components other than the electromagnet. According to this configuration, the induced current caused by the induced electromotive force of the electromagnetic coil is returned to the low-potential power supply prepared in advance as a power supply for supplying power to engine components other than the electromagnet (for example, a control unit). The recovered energy is used to drive engine components other than the electromagnet. According to a fourth aspect of the present invention, the amount of return of the induced current to the low-potential power supply is changed according to the displacement position of the engine valve. According to this configuration, the energy regeneration due to the return of the induced current simultaneously generates the deceleration force of the engine valve. Therefore, the energy regeneration amount (recirculation current amount) changes according to the displacement position of the engine valve. With such a configuration, the deceleration force is controlled according to the displacement position of the engine valve. According to the first aspect of the present invention, the configuration is such that the induced current is returned to the low potential power supply, so that the potential difference generated between the elements for controlling the return of the induced current can be reduced. In addition to being able to use an inexpensive element with a small capacity, the potential on the electromagnetic coil side can be kept lower than the driving power supply, and the switching of the current direction from the induced current to the powering current can be performed with good response, for example, to suppress rebound. Force control can be performed with good response to reduce rebound. According to the second aspect of the invention, the energy recovered by the low-potential power supply is returned to the driving power supply for the electromagnet, and the energy recovered from the electromagnetic coil can be used for driving the electromagnet. is there. Claim 3
According to the invention described above, the energy recovered from the electromagnetic coil to the low potential power supply is used for driving other than the electromagnet while keeping the low potential, so that there is no boosting circuit and the circuit configuration can be simplified. According to the fourth aspect of the present invention, it is possible to apply a deceleration force according to the displacement position of the engine valve, and reduce the collision energy when hitting the stopper while ensuring the responsiveness of the opening and closing operation of the engine valve. As a result, it is possible to reduce collision noise and rebound and to improve durability. Embodiments of the present invention will be described below. FIG. 1 shows an electromagnetic drive device for an engine valve according to the present invention.
An embodiment applied to an intake valve is shown. In this FIG.
The intake valve 1 is an engine valve that opens and closes an open end of an intake port 3 formed in a cylinder head 2. The intake valve 1 is separated from and seated on an annular valve seat 3 a provided at the open end of the intake port 3, and closes the open end. It has an umbrella portion 1a that opens and closes, and a stem 1b that slides along a sliding hole formed through the cylinder head 2. In the middle of the stem 1b, a flange 1c is provided.
Is formed, and the upper surface of the flange 1c and the cylinder head 2 are formed.
A valve-opening coil spring 4 is compressed and mounted between the intake valve 1 and the lower side of the flange 1c and the cylinder head 2 side. Is urged downward (valve opening direction) by the valve opening coil spring 4 and urged upward (valve closing direction) by the valve closing coil spring 5. I have. A disk-shaped armature 6 made of a magnetic material is provided at the base end of the stem 1b, and electromagnets 7 and 8 are vertically arranged with the armature 6 interposed therebetween. The electromagnets 7 and 8 include a core 9, an upper electromagnetic coil 10, and a lower electromagnetic coil 11. The core 9 has a cylindrical portion 9 surrounding the armature 6.
a, a pair of disk-shaped portions 9b and 9c respectively covering the upper and lower open ends of the cylindrical portion 9a, and a circular hole 9d formed at the center of the disk-shaped portions 9b and 9c, respectively, extending inward. A pair of small-diameter cylindrical portions 9e and 9f,
The distal ends of the small-diameter cylindrical portions 9e and 9f are opposed to each other with the armature 6 provided at the base end of the stem 1b inserted through the inner periphery of the cylindrical portion 9e interposed therebetween. The upper electromagnetic coil 10 and the lower electromagnetic coil 11 are provided on the outer peripheral side of the small-diameter cylindrical portions 9e and 9f.
The coils are wound in the same winding direction, and the electromagnetic coils 10 and 11 are connected in series. Further, the cylindrical portion 9
A cylindrical permanent magnet 12 having a magnetic pole in a vertical direction is mounted between the upper electromagnetic coil 10 and the lower electromagnetic coil 11 on the inner periphery of a. That is, the driving device for the intake valve 1 shown in the figure comprises a valve opening coil spring 4, a valve closing coil spring 5, electromagnets 7, 8 and a permanent magnet 12 for the intake valve 1.
Are driven to open and close, and can be simplified as shown in FIG. The permanent magnet 12
When the armature 6 is sucked through the core 9 and the armature 6 is in contact with the tip of the small-diameter cylindrical portion 9e or the small-diameter cylindrical portion 9f, the armature 6 is brought into the neutral position by the valve-opening coil spring 4 and the valve-closing coil spring 5. The armature 6 is set to have a magnetic attraction force capable of maintaining the state in which the armature 6 comes into contact with the small-diameter cylindrical portions 9e and 9f, overcoming the urging force to be returned. For example, as shown in FIG. 3A, when the armature 6 is attracted to the tip of the upper small-diameter cylindrical portion 9e, the armature 6 is moved by the permanent magnet 12 in a closed state.
The force Fm1 for upwardly sucking the coil springs 4 and 5
Is larger than the force Fst for urging the armature 6 downward, and the closed state of the intake valve 1 is maintained. When the valve is opened from such a closed state, as shown in FIG. 3B, a drive current in a direction that generates an electromagnetic force Fcl1 in a direction of pushing down the armature 6 to the electromagnetic coils 10 and 11, in other words, For example, by supplying a drive current in a direction that generates a magnetic field opposite to the magnetic field of the permanent magnet 12, the armature 6
The sum of the spring force Fst and the electromagnetic force Fcl1, which is a force in the direction of pushing down the armature 6, is set to be greater than the force Fm1 for sucking the armature upward. As a result, the armature 6 separates from the tip of the upper small-diameter cylindrical portion 9e and starts downward displacement. The supply of the drive current to the electromagnetic coils 10 and 11 is stopped after the start of the displacement, and the armature 6 separated from the tip of the small-diameter cylindrical portion 9e is moved to the lower small-diameter cylindrical portion beyond the neutral position by inertia force. The armature 6 is attracted to the distal end of the small-diameter cylindrical portion 9f by approaching the small-diameter cylindrical portion 9f by approaching the small-diameter cylindrical portion 9f. Here, in order to prevent the armature 6 from rebounding after hitting the tip of the small-diameter cylindrical portion 9f, the energizing direction to the electromagnetic coils 10 and 11 is switched so that the armature 6 is temporarily energized. , 1
The armature 6 is caused to be attracted to the tip of the small-diameter cylindrical portion 9f by generating an electromagnetic force in the direction of attracting toward 1. When the armature 6 is attracted to the tip of the small-diameter cylindrical portion 9f by the magnetic force of the permanent magnet 12, the coil springs 4 and 5 urge the armature 6 upward as shown in FIG. However, the armature 6 is more strongly moved by the permanent magnet 12 than the spring force Fst.
The force Fm1 for sucking the pressure downward is large, and the valve open state is maintained. FIG. 4 is a diagram showing a circuit for controlling the energization of the electromagnetic coils 10 and 11. In this FIG.
p-channel FET 51a and n-channel FET 5
1b and a p-channel FET 51c
And a series connection circuit of the n-channel FET 51d are connected in parallel with each other, and the parallel circuit is connected to a driving power source (24 V to 6 V).
0V) in series. The p-channel FET 51a
And the n-channel FET 51b and the p-channel FET 51c and the n-channel FET 51d are electrically connected by a series connection circuit of the electromagnetic coils 10 and 11. Note that a diode 52 is connected in parallel to each of the FETs 51a to 51d with the conduction direction reversed. In the above configuration, the FET 51c and the FE
T51b is turned ON, and FET51a and FET51d are turned ON.
When FF is performed, a current flows in the direction A to the electromagnetic coils 10 and 11, and on the contrary, the FETs 51c and 51b are turned off.
F, when the FET 51a and the FET 51d are turned on, a current flows through the electromagnetic coils 10 and 11 in the direction B opposite to the direction A. ON / OFF of the FETs 51a to 51d
Are controlled by a gate driver 53, and the FETs 51a-5
The generation and direction of the electromagnetic force in the electromagnets 7 and 8 are controlled by the ON / OFF control of 1d. Further, n-channel FETs 55a and 55b are connected to both ends of the series connection circuit of the electromagnetic coils 10 and 11 in parallel with the electromagnetic coils 10 and 11, respectively. Are connected in series to the capacitor 56. A transformer 5 for reducing the voltage of the drive power supply Vi to generate a low potential Vlow dedicated to regeneration by lowering the voltage of the drive power supply Vi between the drive power supply Vi of the electromagnetic coils 10 and 11 and the terminal of the capacitor 56.
7 are interposed. The n-channel type FET 55
The switching between a and 55b is controlled by the regenerative current control unit 58. In the above configuration, when the state in which the valve opening or valve closing position is held by the permanent magnet 12 is released by the electromagnetic force of the electromagnets 7 and 8, and the intake valve 1 starts to be displaced, the drive current is supplied. The magnetic flux of the stopped electromagnetic coils 10 and 11 changes to generate an induced electromotive force. At this time, when the n-channel FETs 55a and 55b are turned on, the electromagnetic coils 10, 11 and the low potential Vlow are conducted, and the induced current is returned to the capacitor 56 to be charged. FIG. 5 shows a simplified circuit configuration shown in FIG. 4 in order to explain in detail the operation of the regenerative charging in the capacitor 56. The electromagnetic coil 1
When an induced electromotive force is generated at 0 and 11, the duty control of the n-channel type FET 55 (switching element) is performed at a predetermined frequency to function as a step-down chopper circuit. In the ON period of the n-channel FET 55, if the induced electromotive voltage Ed is higher than the low potential Vlow, the induced current i is transferred from the electromagnetic coils 10, 11 to the capacitor via the n-channel FET 55 and the diode 54. Then, the capacitor 56 is charged. Here, the potential difference between both ends of the n-channel FET 55 is
Since it is Ed-Vlow, the potential difference between both ends of the switching element is smaller than when a boost chopper circuit is used, and a low-capacity and inexpensive switching element can be used. Further, since the potential difference of the return path is kept at a large value, the amount of current flowing out of the electromagnetic coils 10, 11 to the capacitor 56 is large, and energy regeneration can be performed with high efficiency. Further, since the configuration is not such that the potential of the electromagnetic coils 10 and 11 (load side) is increased, the supply of the driving current (powering current) to the electromagnetic coils 10 and 11 is started from the state where the induced electromotive force is generated. The switching response when a current in the opposite direction to the induced current flows is fast. Therefore, when the drive current is supplied for suppressing the rebound, the electromagnetic force suitable for the control of the supply of the drive current can be generated with good response, and the rebound can be suppressed small. The electric charge once stored in the capacitor 56 is boosted by the transformer 57 and is returned to the drive power supply for the electromagnetic coils 10 and 11.
Used for driving 0,11. Here, when the n-channel FET 55 is duty-controlled at a predetermined frequency to charge the capacitor 56 (recover energy), a deceleration force of the intake valve 1 is generated at the same time. When the energy regeneration efficiency is high as in the present embodiment, a large deceleration force is obtained. Therefore, if the energy regeneration is performed uniformly and immediately after the start of the operation of the intake valve 1 until the end of the operation, the opening / closing response is greatly reduced. Therefore, the ON time ratio in the duty control of the n-channel FET 55 is increased as the operation end position is approached, and the energy regeneration amount (deceleration force) is increased as the operation end position is approached. Is preferred. With this configuration, the speed at which the armature 6 collides with the small-diameter cylindrical portions 9e and 9f (stopper) can be reduced while ensuring the opening and closing response, thereby reducing the collision sound and rebound. Can be improved in durability. It is preferable that the ON time ratio is gradually increased and changed in accordance with the displacement position of the intake valve 1. However, for simplicity, the first half of the drive of the intake valve 1 is controlled by the n-channel FET.
55 may be held in the OFF state, and switching may be performed at a constant ON time ratio in the latter half of driving. ON
The change in the time ratio can be performed based on a detection signal from a position sensor that detects the displacement position of the armature 6, and can be performed in accordance with the elapsed time from the start of the operation. Although the circuit configuration is simplified in FIG. 5, in an actual circuit, as shown in FIG. 4, two return paths of the induced current are provided in accordance with the direction of the induced current due to the induced electromotive force.
A system is provided to select which one of the n-channel FETs 55a and 55b is duty-controlled in accordance with the direction of the induced current. By the way, in the above-described embodiment, the drive power supply for the electromagnetic coils 10 and 11 is stepped down to generate a low potential. However, in addition to the high voltage source required for driving the electromagnetic coils 10 and 11, for example, a control unit Dedicated low voltage source (5 V to 1
2V), it can be configured as shown in FIG. In the second embodiment shown in FIG. 6, the low-voltage source is connected to a capacitor 56, and the energy stored in the capacitor 56 is used as a power source for the low-voltage source except for driving the electromagnetic coils 10 and 11. It is used to drive the constituent parts. According to the above configuration, the transformer 57 is omitted, and the circuit configuration of the driving device can be simplified. It should be noted that the engine valve is not limited to the intake valve 1 described above, and it is apparent that other engine valves such as an exhaust valve can be similarly configured.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an actuator unit in an electromagnetic drive device according to an embodiment. FIG. 2 is a schematic view showing an actuator unit in the electromagnetic drive device of the embodiment in a simplified manner. 3A and 3B are schematic diagrams illustrating an operation of the electromagnetic drive device according to the embodiment; FIG. 3A is a valve-closed holding state; FIG. 3B is a valve-closed to valve-opening operating state; FIG. FIG. 4 is a circuit diagram showing a control circuit in the electromagnetic drive device of the embodiment. FIG. 5 is a circuit diagram simplified to explain an energy regeneration operation in the embodiment. FIG. 6 is a circuit diagram showing another embodiment of the control circuit. [Description of Signs] 1 ... intake valve (engine valve) 4 ... valve opening coil spring 5 ... valve closing coil spring 6 ... armature 7, 8 ... electromagnet 10 ... upper electromagnetic coil 11 ... lower electromagnetic coil 12 ... permanent magnet 51 55, FET 52, 54 Diode 53 Gate driver 56 Capacitor 57 Transformer 58 Regenerative current control unit

Continuation of front page    (72) Inventor Seinosuke Hara             1370 Onna, Atsugi City, Kanagawa Prefecture             Nissia Jex F term (reference) 3G018 AB09 BA38 CA16 DA34 DA45                       DA46 EA01 EA24 GA03 GA18                       GA37                 3H106 DA07 DA25 DB02 DB12 DB26                       DB32 DC02 DC17 DD04 EE48                       FA10 KK17                 5E048 AA04 AB01 AD07 BA07                 5H540 AA10 BA10 BB06 EE05

Claims (1)

  1. Claims: 1. An engine valve which is driven to open and close by an electromagnet and a permanent magnet, and wherein the supply of a drive current to the electromagnet is stopped, the engine valve being driven in accordance with the displacement of the engine valve. An electromagnetic drive device for an engine valve that performs energy regeneration by using an induced electromotive force generated in an electromagnetic coil, wherein the induced current due to the induced electromotive force is returned to a power source having a lower potential than a drive power source of the electromagnet to perform energy regeneration. An electromagnetic drive device for an engine valve, wherein the drive is performed. 2. The electromagnetic drive device for an engine valve according to claim 1, wherein after the induced current is returned to the low-potential power source, the induced current is boosted and returned to the drive power source. 3. An electromagnetic valve driving apparatus for an engine valve according to claim 1, wherein said low-potential power supply is a power supply for supplying power to an engine component other than said electromagnet. 4. The engine valve according to claim 1, wherein the amount of recirculation of the induced current to the low-potential power supply is changed according to a displacement position of the engine valve. Electromagnetic drive.
JP2001183078A 2001-06-18 2001-06-18 Electromagnetic drive unit for engine valve Pending JP2003007532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001183078A JP2003007532A (en) 2001-06-18 2001-06-18 Electromagnetic drive unit for engine valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001183078A JP2003007532A (en) 2001-06-18 2001-06-18 Electromagnetic drive unit for engine valve

Publications (1)

Publication Number Publication Date
JP2003007532A true JP2003007532A (en) 2003-01-10

Family

ID=19023073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001183078A Pending JP2003007532A (en) 2001-06-18 2001-06-18 Electromagnetic drive unit for engine valve

Country Status (1)

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JP (1) JP2003007532A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6948461B1 (en) 2004-05-04 2005-09-27 Ford Global Technologies, Llc Electromagnetic valve actuation
US7027913B2 (en) 2002-11-29 2006-04-11 Denso Corporation Vehicle control system
KR100753881B1 (en) * 2002-05-09 2007-09-03 나이키 인코포레이티드 Footwear sole component with a single sealed chamber
US7295417B2 (en) 2004-05-04 2007-11-13 Ford Global Technologies, Llc Electromagnetic valve actuation with series connected electromagnet coils
KR101629581B1 (en) * 2014-12-15 2016-06-13 현대오트론 주식회사 Solenoid valve control apparatus for preventing a boost voltage
CN108131487A (en) * 2017-12-20 2018-06-08 中国航发贵州红林航空动力控制科技有限公司 A kind of electromagnetic valve switch control system of type multimode electromagnetic valve actuator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100753881B1 (en) * 2002-05-09 2007-09-03 나이키 인코포레이티드 Footwear sole component with a single sealed chamber
US7027913B2 (en) 2002-11-29 2006-04-11 Denso Corporation Vehicle control system
US6948461B1 (en) 2004-05-04 2005-09-27 Ford Global Technologies, Llc Electromagnetic valve actuation
US7295417B2 (en) 2004-05-04 2007-11-13 Ford Global Technologies, Llc Electromagnetic valve actuation with series connected electromagnet coils
KR101629581B1 (en) * 2014-12-15 2016-06-13 현대오트론 주식회사 Solenoid valve control apparatus for preventing a boost voltage
CN108131487A (en) * 2017-12-20 2018-06-08 中国航发贵州红林航空动力控制科技有限公司 A kind of electromagnetic valve switch control system of type multimode electromagnetic valve actuator
CN108131487B (en) * 2017-12-20 2019-06-28 中国航发贵州红林航空动力控制科技有限公司 A kind of electromagnetic valve switch control system of type multimode electromagnetic valve actuator

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