JP2002256907A - Solenoid valve driving device of internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve driving device of an internal combustion engine for reducing adaptive manhours with the simple constitution, and capable of executing accurate valve seating control. SOLUTION: Current pattern of a drawing 2 is for controlling a lift quantity of a valve. First of all, a current quantity to a solenoid is controlled in a first prescribed position according to the lift quantity of the valve. The first prescribed position is preferable in a position having the most influence on a seating way of the valve as compared with the other position. For example, about 1 mm is preferable. As a second prescribed position, for example, the current OFF timing is controlled in about 0.5 mm. As a third prescribed value, for example, the current On timing is controlled again in about 0.2 mm, and as a fourth prescribed position, for example, the current quantity is controlled in about 0.1 mm. Thus, since adaptive control is executed at several points, accurate valve control can be executed with the simple constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic valve driving device, and more particularly to drive control when a valve is opened and closed.

[0002]

2. Description of the Related Art Conventionally, as intake and exhaust valves of an internal combustion engine,
A camshaft driven based on the rotation of a crankshaft is generally used. From the viewpoint of improving the performance of the internal combustion engine, various variable mechanisms of a valve operating system are being put into practical use for the purpose of controlling an optimal valve opening / closing timing according to an operating state. On / off control type) and continuously variable type are also being developed. These variable mechanisms include those that shift the rotation phase of the camshaft and those that have a plurality of profiles on the camshaft.

However, with the intake and exhaust valves driven by the camshaft described above, it is impossible to independently and arbitrarily set all of the valve lift (valve lift), the valve opening period, and the valve opening / closing timing. Therefore, in recent years, in order to meet the demand for higher performance of the internal combustion engine, research on an electromagnetically driven valve train that can set those parameters to ideal values according to the operation state has been activated. I have.

For example, Japanese Patent Application Laid-Open No. Sho 59-2113913 discloses that a valve body is elastically supported at a neutral position by a biasing force of a pair of springs, and an electromagnetic force is applied to a plunger connected to the valve body. An electromagnetically driven valve having a structure for moving a valve body from a neutral position to a fully open direction or a fully closed direction is disclosed. As described above, a spring-mass system including the plunger as a mass is provided.
The electromagnetically driven valve constituting (tem) is excellent in that power consumption is low.

In the electromagnetically driven valve constituting the spring mass system, the force acting on the plunger is an electromagnetic force and an urging force of a spring. This electromagnetic force is generated between the plunger and the electromagnet generating the electromagnetic force. As the distance becomes smaller, it increases sharply compared to the urging force. Therefore, as is common to other electromagnetically driven valves, control (seating control) for reducing the impact when the plunger is attracted to or seated on the electromagnet is required.

The seating control is disclosed in Japanese Patent Laid-Open No. 11-15 / 1999.
The technology disclosed in Japanese Patent No. 9313 is disclosed. In this publication technique, it provided the de-energization timing just before seating of the plunger as shown in t ₂ ~t ₃ in FIG. 2, while detecting the seating velocity that time, the de-energization so seating velocity is minimized A learning control method in which the start time and the end time are changed and stored is devised.

[0007]

During operation of the internal combustion engine, the in-cylinder pressure varies greatly depending on the operating condition. Since the change in the in-cylinder pressure has a great effect on the opening / closing control of the electromagnetically driven valve, the seating control of the plunger cannot be accurately performed only by adjusting the off period of the energization timing as in the technique disclosed in the above publication. There is a fear.

Here, in order to carry out the seating control with high accuracy even if the in-cylinder pressure largely changes, the injection current (FIG. 2)
Is the control target, there are multiple combinations of the closing current, the off start time, and the off end time that minimize the sitting speed even under the same conditions. It becomes more complicated, and it takes time to converge, and controllability deteriorates.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an electromagnetic valve driving device capable of uniquely determining these parameters.

[0010]

According to the first aspect of the present invention,
A rod that moves in the valve closing direction or the valve opening direction integrally with the valve, and an armature that is integrally provided around the rod;
A valve-side spring that urges the valve in the valve-closing direction and a valve-opening spring that urges the valve in the valve-opening direction; A valve-closing solenoid that holds the valve closed, and a valve-opening solenoid that is provided at a predetermined interval on the other end face side of the armature and absorbs the armature and holds the valve open. And an energization control means for energizing the solenoid for opening the valve and the solenoid for closing the valve, wherein a parameter relating to a speed of the valve is set such that the valve is seated accurately in accordance with an operation region. Target parameter setting means for setting a target value of the valve, speed parameter detecting means for detecting a parameter relating to the speed of the valve, and detecting a position of a lift of the valve. And a valve position detecting means for,
The energization control unit detects the target parameter detected by the target parameter detection unit and the speed parameter detection unit when the position of the valve detected by the valve position detection unit reaches a first predetermined position. Based on the parameters relating to the speed of the valve to be
An energization amount setting unit that sets an energization amount to the solenoid for valve opening and the solenoid for valve closing, and when a position of the valve detected by the valve position detection unit reaches a second predetermined position. Based on a target parameter detected by the target parameter setting means and a parameter relating to a valve speed detected by the speed parameter detecting means, a timing for turning off the power to the solenoid for opening the valve and the solenoid for closing the valve. And power-off timing setting means for setting

Conventionally, according to the lift amount of the valve, FIG.
There is known an apparatus which controls the seating of a valve by setting the amount of energization as described above. In the technique disclosed in Japanese Patent Application Laid-Open No. 11-159313, the seating control of the valve is performed by setting the energization off timing (FIG. 2) and the energization ON timing (FIG. 2). In the invention of claim 1,
In addition to this, the valve seating control can be performed with higher accuracy by controlling the amount of the supplied current (FIG. 2). At this time, since there are three control parameters, there is a concern that the adaptation man-hour may increase. However, according to the first aspect of the present invention, when the valve position is the first predetermined position, the injection current (FIG. 2) is controlled. When the valve position is the second predetermined position, the power-off timing is set, so that the control parameter can be uniquely determined at each predetermined position, thereby reducing the number of adaptation steps and performing accurate seating control. be able to.

The first position of the armature with respect to the seating position
Since the predetermined position is farther than the second predetermined position, controlling the make-up current (FIG. 2) at the first predetermined position greatly affects the valve speed when the armature is seated. Can be. In the second predetermined position, the first
As compared with controlling the make-up current (FIG. 2) at the predetermined position, the valve speed when the armature is seated cannot be greatly affected, but the power-off timing is set at the second predetermined position. This allows fine adjustment as compared to controlling the input current (FIG. 2).

Further, according to the invention of claim 2, according to claim 1
In addition to the above configuration, the energization control unit may further include a position of the valve detected by the valve position detection unit being a third position.
The valve opening solenoid or the valve closing based on a target parameter detected by the target parameter detecting means and a parameter relating to a valve speed detected by the speed parameter detecting means when the predetermined position is reached. Energizing on timing setting means for setting energizing on timing to the solenoid for use.

Thus, the energization ON timing is set at the third predetermined position closer to the seating position, so that the valve can be seated accurately and smoothly.

Further, as in the third aspect of the present invention, when the valve position detected by the valve position detecting means reaches a fourth predetermined position,
The amount of power to the solenoid for opening the valve or the solenoid for closing the valve is set based on a target parameter detected by the target parameter detecting means and a parameter relating to a valve speed detected by the speed parameter detecting means. May be provided.

According to a fourth aspect of the present invention, in the electromagnetic valve driving apparatus for an internal combustion engine according to any one of the first to third aspects, the parameter detected by the speed parameter detecting means is set to be the following. The target value set by the target parameter setting means is a target speed of the valve with respect to the position of the valve.

According to the fifth aspect of the present invention, the rod that moves in the valve closing direction or the valve opening direction integrally with the valve, the armature provided integrally around the rod, and biases the valve in the valve closing direction. A valve-closing spring and a valve-opening spring that urges the valve in the valve-opening direction, and a valve that is provided at one end face of the armature at a predetermined interval and sucks the armature to hold the valve closed. A valve solenoid, a valve opening solenoid provided at a predetermined interval on the other end face side of the armature for absorbing the armature and holding the valve open, the solenoid for valve opening and the closing A solenoid valve drive device comprising: a current control means for controlling current supply to a solenoid for a valve, wherein a target speed setting for setting a target speed of the valve such that the valve is accurately seated in accordance with an operation area. Means, a valve speed detecting means for detecting a speed of the valve, and a valve position detecting means for detecting a position of a lift of the valve, wherein the energization control means is a valve detected by the valve position detecting means. When the armature reaches a predetermined position immediately before the armature is absorbed by the solenoid, the target speed of the valve set by the target speed setting means and the valve speed detected by the valve speed detection means. Based on the above, there are provided a power-on timing setting means for setting power-on timings for the valve-opening solenoid and the valve-closing solenoid, and a power-amount setting means for setting a subsequent power-amount.

The electromagnetic force has such a characteristic that it grows more rapidly as the distance between the armature and the solenoid is reduced. At a predetermined position immediately before the armature is absorbed by the solenoid, the manner in which the armature is seated when the armature is seated can be finely adjusted because the electromagnetic force rapidly grows as described above.

[0019]

<First Embodiment> FIG. 1 shows an embodiment of an electromagnetic valve driving apparatus according to the present invention, which will be described below. Known engine head 2
An intake port 21 is provided at 0, and a valve 1 as an intake valve for opening and closing the intake port 21 is provided. The valve 1 has a valve seat 1a formed at the end of the intake port 21.
And a valve body 22 that constitutes a valve portion and closes the intake port 21, and a stem 23 extending above the valve body 22. The stem 23 is slidable vertically in the valve guide 2 press-fitted and fixed to the engine head 20. It is inserted and held.

The engine head 20 above the valve guide 2
The lower spring 1 serves as a valve-closing spring between the spring 23 and the spring stopper 24 provided at the upper end of the stem 23.
0 is disposed, and the valve 1 is closed (upward in the figure).
It is energizing. A cylindrical housing 25 whose upper end is closed by the cover member 11 and whose lower end is opened is fixed to the upper surface of the engine head 20, and the upper end of the stem 23 is connected to the lower end of the movable element 3 slidably housed in the housing 25. Contacting the department. On the outer periphery of the mover 3, a lower coil 7, which is a valve opening solenoid for opening the valve 1 and maintaining the state, is provided.

A disk-shaped armature 19 made of a magnetic material is fixed to the outer periphery of the upper end of the mover 3, and the lower coil 7 and the lower core 6 are arranged at a predetermined interval on the lower surface of the armature 19. . The spacer 8 is a member that holds the armature 19 so as to be slidable in the vertical direction, and regulates the operation in the rotation direction. The lower core 6, the lower coil 7, and the target side with respect to the armature 19 are provided with the upper coil 5 and the upper core 4, which are valve closing solenoids for operating the valve 1 on the valve closing side and maintaining the state. Above the armature 19, a mover 26 is arranged on the extension of the stem 23 and the mover 3. The mover 26 is a cover member 1
1 slidably held in the vertical direction, and the upper end thereof is in contact with a spring stopper 27.

The upper end of the cover member 11 is configured to receive the lower end of an upper spring 9 for urging the valve 1 in the valve opening direction, and the upper spring 9 is received by the cover member 11 and the housing 27. . Here, the spring forces of the springs 8 and 9 are set to be equal, and the armature 19 is stationary at a substantially intermediate position between the coils 5 and 7 in the illustrated state where power is not supplied to the upper coil 5 and the lower coil 7.

When power is supplied to either the upper coil 5 or the lower coil 7, the armature 19 is driven to be sucked upward or downward, whereby the valve 1 is closed or opened.

On the outer periphery of the armature 19, a cylindrical spacer 8 is disposed along the inner peripheral surface of the cylindrical housing 25,
The distance between the armature 19 and the cores 4, 6 is set by the spacer 8, and the stroke length of the armature 19, that is, the valve lift is adjusted.

The lower end of the cylindrical housing 25 has a valve 2
Is provided with a valve position detection sensor 12 for detecting the position. The mover 3 in the vicinity of the valve position detection sensor 12 is configured such that the diameter of the mover decreases in the valve body direction, and the valve position detection sensor 12 outputs an output value according to the distance from the mover 3. It is configured to The valve position detection sensor 12 outputs a large value as the mover 3 moves in the valve closing direction, and outputs a small value as the mover 3 moves in the valve opening direction. The valve position detection sensor 1 at this time
2, the position of the valve 1 is detected. The valve position detection sensor 12 is provided with a differentiating circuit (not shown), and detects the speed of the valve 1 by differentiating the output value output from the valve position detection sensor 12.

Next, an outline of a circuit configuration for controlling energization of both coils 5 and 7 will be described with reference to block diagrams 13 to 18. The vibration transmitter 15 is a circuit that outputs a waveform having a constant frequency, and the control circuit 13 sets a threshold for the waveform of the vibration transmitter 15 in accordance with a command from a command input 14. The switch 16 is configured to output an ON signal when the waveform of the vibration transmitter 15 is larger than the threshold set by the control circuit 15. on the other hand,
Reference numeral 18 denotes, for example, a battery as an energy source,
The voltage from the battery 18 is amplified by the amplifier 17. Then, the voltage amplified by the amplifier is
When the ON signal of 6 is output, one of the coils 5, 7 is energized.

In the non-energized state shown in FIG. 1, since the forces of the springs 9 and 10 are substantially equal, the armature 19 is at an intermediate position between the coils 5 and 7. From here, it is necessary to perform a start control for closing all the valves 2 once before starting the engine. The start control is performed by using the natural vibration of the spring-mass system determined by the mass of the movable part and the spring of the system, and by alternately energizing the upper coil 5 and the lower coil 7 at a resonance frequency corresponding to the natural vibration. You. If the start control is performed for a while, the valve 1 starts to vibrate and the amplitude increases. Eventually, it will operate up to the maximum riff position defined by the distance between the coils 5,7. Here, by holding the armature 19 in a state where it is attracted to the upper coil 5, the closed state of the valve 1 can be maintained, and the startup control ends.

Thereafter, the engine is started, and the amount of energization to the upper coil 5 and the lower coil 7 is controlled to open and close the intake valve and the exhaust valve of the engine at an arbitrary timing based on the output of each sensor from the engine.

In controlling the opening and closing of the valve 1, the seating control of the valve 1 or the armature 19 is important. That is, if the seating speed is too high, the collision between the upper core 4, the lower core 6, and the valve seat 1a not only generates a loud tapping sound, but also promotes the deformation of the member. Therefore, it is important to control the seating speed to be low. The target speed at the time of sitting is preferably, for example, about 0.04 m / s.

In this embodiment, control when the valve 1 is opened will be described in detail. The maximum lift amount based on the opening time of the valve 1 is 4 when the armature 19 is adsorbed on the upper core 4, and the lift amount becomes 0 when the armature 19 is adsorbed on the lower core 6. Here, valve 1
Means that the armature 19 is adsorbed to the lower core 6, and the seating speed at this time is controlled to be a small value. In the present embodiment, a target trajectory of a speed corresponding to the valve lift amount is provided as a map as shown in FIG. 3 so that the valve 1 reaches the target speed when the valve 1 is seated. Since the opening and closing movement of the valve 1 is most affected by the combustion pressure of the internal combustion engine, a map of the target trajectory is set for each operating region of the internal combustion engine, and furthermore, the final speed is determined in consideration of main disturbance conditions and the like. Set the target trajectory map.

A description will be given of a method of adapting an energization pattern so that the valve speed follows the target trajectory of the valve speed obtained in this manner. FIG. 4A shows the speed of the valve 1 according to the energization pattern of FIG. When the energization pattern shown in FIG. 2 is used, the valve 1 is not sufficiently decelerated, so that the lower coil 7 is adsorbed at a high speed. In the adaptation method of the present embodiment, adaptation is performed using four steps in order to match the seating speed to the target speed.

<Method of Adapting Valve Speed> This method of adapting the valve speed will be described with reference to the flowchart shown in FIG. First, in step S10, the applied current (FIG. 2) when the lift amount is about 1 mm is adapted. Lift amount is 1
The reason why the applied current is applied at about mm is that the electromagnetic force grows rapidly as the position of the armature 19 is closer to the lower coil 7, and is experimentally necessary to control the seating of the valve 1 at about 1 mm to 2 mm. High electromagnetic force can be obtained. That is, when the lift amount is 2 mm or more, even if the lower coil 7 is energized, there is almost no effect on the valve speed, so that there is a possibility that extra power is consumed. For this reason, FIG.
As shown in (b), the applied current is adjusted at a position where the lift amount is about 1 mm.

In this case, the adaptation of the applied current is adjusted so that the final seating speed of the valve 1 becomes 0.04 m / s + α. When the speed of the valve 1 is reduced so as to conform to the target valve speed, the applied current is set to a small value, and when the speed of the valve 1 is increased, the applied current is set to a large value. The reason why the final valve speed is set to 0.04 m / s + α is that the control of the valve 1 speed by the applied current in this step has a greater effect on the seating speed than in the three steps described later. is there. Therefore, when trying to match the final target speed of the valve, the seating speed of the valve may be 0.04 m / s or less, which is equivalent to the seating speed by the conventional cam drive, and a suction error of the valve 1 occurs. This is because there is a fear. Actually, since the input current is temporarily delayed, the energization start timing is set such that the lift amount of the valve 1 is 1 mm.
The energization is started at the position of the lift amount larger than that, and when the lift amount of the valve 1 becomes 1 mm, it is adapted so as to become the target closing current.

Next, in step S20, FIG.
As shown in (2), when the lift amount of the valve 1 is about 0.5 mm, the power-off timing of the lower coil 7 is adjusted. Setting the energization off timing of the lower coil 7 earlier shortens the execution time of the applied current, so that the influence of the applied current on the valve 1 can be reduced. In addition, since the energization off period increases, only the spring force of the two springs 9 and 10 is applied to the valve 1, the deceleration is sufficiently performed, and the valve 1 is further decelerated.

In contrast to the earlier setting of the power-off timing as described above, the later setting of the power-off timing to the lower coil 7 sets the execution time of the input current longer, so that the valve 1 based on the input current becomes longer. The effect on can be increased. Further, the period during which the valve 1 is decelerated by only the spring force of both springs 9 and 10 is shortened by reducing the energization off period, and the deceleration of the valve 1 is reduced. In the setting of the power-off timing, the influence on the seating speed of the valve 1 is smaller than the influence on the seating speed of the valve 1 by the applied current in step S10. However, since the fine adjustment is possible as compared with the adjustment with the input current, the speed of the valve 1 at the time of sitting can be adjusted more accurately.

Next, the adaptation in step S30 shown in FIG. 4D will be described. The applicable object here is valve 1
Is the power-on timing when the lift amount is about 0.2 mm. If the energization ON timing of the lower coil 7 is set to be late, the energization OFF period becomes longer, so that the period in which only the spring force of both springs 9 and 10 is applied to the valve 1 increases, and the valve 1 is sufficiently decelerated. Will be done. In addition, setting the energization ON timing earlier shortens the energization OFF period, so that the period in which only the spring force of both springs 9, 10 is applied to the valve 1 decreases, and the valve 1 is sufficiently decelerated. The period becomes smaller.

Next, a description will be given of a process performed in step S40 for adjusting the amount of current supplied to the lower coil 7 when the lift amount of the valve 1 is about 0.1 mm. At a position where the valve lift amount is about 0.1 mm, a larger electromagnetic force can be obtained because the armature 19 is just before the lower core 6 is attracted to the armature 19. For this reason, there is an effect to prevent a suction error of the valve 1 and the like.

As described above, in the method of adjusting the valve speed according to the present embodiment, when the valve lift amount is about 1 mm, the amount of the applied current is adjusted, and the suction of the valve by the applied current is adjusted. And the valve lift amount is 0.5m
At positions of about m and about 0.2 mm, the energization off period is set by setting the energization off timing and the energization on timing, and the deceleration of the valve speed is determined. By setting the energizing amount of the applied current and the energizing off period in this way, the seating speed of the valve 1 is set to the target seating speed with higher accuracy than in the conventional technique of setting only the energizing off period. be able to. Also, an increase in parameters for adjusting the seating speed of the valve 1 to the target seating speed may cause an enormous amount of adaptation man-hours. However, as in the present embodiment, the valve position is set to 0. .1m
When about m, the input current can be adjusted independently, and when about 0.5 mm, 0.2 mm, the energization off period can be independently adjusted. Therefore, a plurality of parameters can be uniquely determined, and the number of adjustment steps increases. Can be prevented.

<Valve Speed Feedback Control> Next, a flowchart for performing valve speed feedback control will be described with reference to the main routine of FIG. First, in step S200, the seating speed at which the armature 19 is adsorbed to the lower core 6 becomes equal to the target speed (for example, 0.04 m /
s) It is determined whether it is larger than. Here, if it is determined that the speed is lower than the target speed, the present routine is terminated as it is. On the other hand, if the seating speed is equal to or higher than the target speed, the process proceeds to step S110 and subsequent processes to perform feedback control of the valve speed.

In step S110, the valve lift is calculated based on the output of the valve position detection sensor 12. Next, in step S120, the valve lift amount calculated in step S110 is set as the first predetermined position, for example, 1
mm, it is determined in step S170
The process of controlling the amount of supplied current is performed, and this routine is terminated. On the other hand, if it is determined that the lift amount is, for example, about 0.5 mm as the second predetermined position, the power-off timing setting process of step S160 is performed, and the present routine ends. If the lift position is, for example, 0.2 mm as the third predetermined position in step S140, the control of the amount of current applied and / or the timing of turning off the current in step S150 is performed, and this routine ends. . Note that, except for the first to third predetermined positions, the determinations in steps S120 to S140 are all NO, and thus this routine is terminated.

<Control of Energizing Amount of Applying Current> The energizing amount control of the applying current in step S170 in FIG. 6 will be described with reference to a subroutine shown in FIG. First, step S20
At 0, the value of the valve lift position calculated in step S110 of FIG. 6 is used to calculate the speed V of the valve 1 by a differentiating circuit or the like as described above. Then, step S2
Proceeding to 10, it is determined whether the calculated valve speed V is higher than the speed A1 and lower than the speed A2. Here, it is determined whether or not the valve speed V is within a predetermined range. If the valve speed V is within the predetermined range, the process proceeds to step S220, and the previous energization amount I1 is input as the energization amount I1 of the input current, and FIG. Return to the main routine. On the other hand, the valve speed V
Is outside the predetermined range, that is, when the deviation between the valve target speed and the valve speed V at the valve lift position at the first predetermined position is large, the armature 19 is finally absorbed by the lower core 6. Speed remains high,
In order to match this with the target seating speed, the input current asked is updated. Actually, in step S230, the deviation between the target speed and the valve speed V is calculated, and in step S240, the correction amount I of the energization amount of the input current is calculated based on the deviation calculated in step S230. . Then, in step S240, the current amount of current I1 is set by adding the correction amount I calculated this time to the previous amount of current I1, and the process returns to the main routine of FIG.

<Electrification OFF Timing Control> Next, FIG.
The energization off timing control in step S160 will be described with reference to a subroutine shown in FIG. First, step S
At 300, the speed of the valve 1 is calculated. Then, in step S310, in order to determine whether or not the valve speed is within a predetermined range, speed B1 <valve speed V <speed B1
It is determined whether the condition is satisfied. Here, when the valve speed V satisfies the above condition, the process proceeds to step S320, the previous energization off timing T1 is set to the current energization off timing, and the process returns to the main routine of FIG.

On the other hand, at step S310, the valve speed V
Does not satisfy the above condition, that is, when the valve lift position is the target speed and the valve speed V at the second predetermined position.
If the deviation is large, the process proceeds to step S330 and subsequent steps to compensate for the deviation. Step S33
At 0, a deviation between the target speed and the valve speed V is calculated, and at step S340, a correction amount T of the power-off timing is calculated based on the calculated deviation. Then, in step S350, the calculated energization off timing is updated by adding the calculated correction amount T to the previous energization off timing T1, and the process returns to the main routine of FIG.

<Electricity control of energizing current or energizing off timing control> Next, the energizing amount control of energizing current or energizing off timing control of step S150 in FIG. 6 will be described with reference to a subroutine of FIG. . In the present subroutine, the valve speed immediately before the armature 19 is attracted to the lower core 6 is detected, and the control of the amount of current supplied and / or the timing of turning off the current is performed. The following is a description with reference to the drawings. First, step S4
At 00, the valve speed V is calculated. After calculating the valve speed, it is determined in step S410 whether the valve speed V is within a predetermined range. As a determination condition, C1 <valve speed V <C2 is a condition. Here, if the above condition is satisfied, the process proceeds to step S420, and the current supply current I1 or the current supply off timing T1 is set to the current supply current I1 or the current supply off timing T1. And returns to the main routine of FIG.

On the other hand, if it is determined in step S410 that the valve speed does not satisfy the above condition, that is, if the valve speed V
When the deviation between the target valve speed and the target valve speed is large, a process for compensating for the deviation is performed in the processes after step S430. In step S430, a deviation between the target speed and the valve speed V is calculated, and the process proceeds to step S440. In step S440, a correction amount I of the energization amount or a correction amount T of the energization off timing according to the deviation calculated in step S430 is calculated, and the process proceeds to step S450. In step S450, I or T is added as the correction amount calculated this time to the previous energizing amount I1 of the previous energizing current or the previous energizing off timing T1, and the energizing amount I1 of the current energizing current or the current energizing off timing Set to
It returns to the main routine of FIG.

In the present embodiment, when the lift position of the valve 1 is at the first to third predetermined positions as described above,
The armature 19 is controlled by the lower core 6 by feedback-controlling the amount of current supplied and the timing at which current is turned off.
The seating speed when adsorbing on the surface was controlled accurately. This makes it possible to independently control the energization amount of the input current and the energization off timing, so that the control range of the valve 1 speed can be increased as compared with the conventional technique of setting only the energization off period. Also, the speed of the valve 1 can be controlled accurately with a simple configuration. The third
At the predetermined position, the energization amount of the make-up current and / or the energization off timing are controlled according to the deviation between the valve speed V and the target speed. Instead, the energization on timing and the energization amount are controlled according to the deviation. You may make it control.

In this embodiment, the target parameter setting means is a means for setting based on the map shown in FIG. 3, and the speed parameter detecting means is a valve for detecting a valve position detected by a sensor 12 for detecting a valve position. A valve position detecting means includes a sensor 1 for detecting a valve position.
2, the energization amount control means is shown in the flowchart of FIG. 7, the energization off timing setting means is shown in the flowcharts of FIGS. 8 and 9, the target speed setting means is set by the map of FIG. The means corresponds to and functions as means for calculating the valve speed by inputting the valve position detected by the sensor 12 for detecting the valve position into a differentiating circuit or the like.

(Other Embodiment 1) In this embodiment,
Although only the valve opening is described for convenience of description, the above-described adaptation method and feedback control may be used when the valve is closed. At this time, when the valve is closed, the combustion pressure of the internal combustion engine promotes the closing motion of the valve.
As indicated by a solid line of 0, the amount of current supplied is smaller than when the valve is open, and the energization off period is set longer than when the valve is open. In addition, as for the adaptation method and the feedback control, the same contents as those described in the embodiment may be used.

(Other Embodiment 2) In this embodiment,
0.1 immediately before the armature 19 is adsorbed on the lower core 6
Although the adaptation of the energization amount was performed in the vicinity of mm, the change in the energization amount here had little effect on the valve speed when the armature 19 was adsorbed to the lower core 6, and therefore, in this embodiment, this adaptation was performed. Not performed.

(Other Embodiment 3) In this embodiment,
Although the adaptation and the control were performed based on the valve speed, the present embodiment is not limited to this, and any parameter relating to the speed may be used.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of the present invention.

FIG. 2 is a diagram showing a valve lift amount and an energization pattern in the first embodiment.

FIG. 3 is a map of a target speed determined for each engine operation area in the first embodiment.

FIG. 4 is a diagram showing adaptation of a valve lift speed in the first embodiment.

FIG. 5 is a flowchart showing a method of adjusting a valve lift speed in the first embodiment.

FIG. 6 is a flowchart illustrating feedback control of a valve speed in the first embodiment.

FIG. 7 is a flowchart showing control of the amount of current applied to the input current in the first embodiment;

FIG. 8 is a flowchart showing power-off timing control in the first embodiment.

FIG. 9 is a flowchart showing control of a supply amount of a supply current or a supply-off timing in the first embodiment.

FIG. 10 is a diagram showing the control of the amount of energization performed in the other embodiment 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Valve, 1a ... Valve seat, 2 ... Valve guide, 3 ... Mover, 4 ... Upper core, 5 ... Upper coil, 6 ... Lower core, 7 ... Lower coil, 8 ... Spacer, 9 ... Upper spring, 10 ... Lower spring, 11 ... housing, 12 ... sensor, 13 ... control device, 14 ... command input, 15 ... vibration transmitter, 16 ... switch, 17 ... amplifier, 18 ... energy source, 19 ... plunger, 20 ... engine head, 21 ... intake port, Reference numeral 22: valve element, 23: stem, 24: spring stopper, 25: tubular housing, 26: movable element, 27: spring stopper, 28: housing.

Claims (7)

[Claims] 1. A rod that moves integrally with a valve in a valve closing direction or a valve opening direction, an armature integrally provided around the rod, a valve-closing spring and a valve that urge the valve in the valve closing direction. A valve-opening spring that biases in the valve direction, a valve-closing solenoid that is provided at a predetermined interval on one end face side of the armature, sucks the armature, and holds the valve closed; A solenoid for opening the valve, which is provided at a predetermined interval on the other end face side of the armature and absorbs the armature to hold the valve open, and energizes and controls the solenoid for opening the valve and the solenoid for closing the valve. An electromagnetic valve driving device comprising: a target parameter for setting a target value of a parameter relating to a speed of the valve so that the valve is seated accurately in accordance with an operation region. Data setting means; speed parameter detecting means for detecting a parameter relating to the speed of the valve; valve position detecting means for detecting a position of a lift of the valve; and the energization controlling means detected by the valve position detecting means. When the position of the valve reaches a first predetermined position, based on a target parameter detected by the target parameter detection unit and a parameter related to a valve speed detected by the speed parameter detection unit,
Energizing amount setting means for setting an energizing amount to the valve-opening solenoid and the valve-closing solenoid, and a position of the valve detected by the valve position detecting means being higher than the first predetermined position by the solenoid. When reaching the second predetermined position on the side absorbed by the valve, based on the target parameter detected by the target parameter setting means and the parameter relating to the valve speed detected by the speed parameter detecting means, the opening is determined. An electromagnetic valve driving apparatus for an internal combustion engine, comprising: a solenoid for a valve; and a power-off timing setting means for setting a power-off timing for the solenoid for valve closing. 2. The power supply control means, when the position of the valve detected by the valve position detection means reaches a third predetermined position on the side absorbed by the solenoid from the second predetermined position. On the basis of a target parameter detected by the target parameter detecting means and a parameter relating to a valve speed detected by the speed parameter detecting means, power supply to the solenoid for valve opening or the solenoid for valve closing is turned on. 2. The electromagnetic valve driving device for an internal combustion engine according to claim 1, further comprising an energization ON timing setting means for setting a timing. 3. The control device according to claim 1, wherein the energization control unit includes: a target parameter detected by the target parameter detection unit when the valve position detected by the valve position detection unit reaches a fourth predetermined position; A second power supply amount setting unit configured to set a power supply amount to the valve opening solenoid or the valve closing solenoid based on a parameter relating to a valve speed detected by the parameter detection unit. Claim 1 or Claim 2
An electromagnetic valve driving device for an internal combustion engine according to any one of the above. 4. The method according to claim 1, wherein the first predetermined position is set in such a manner that when the solenoid for valve opening or the solenoid for valve closing is energized, the subsequent armature is absorbed by the solenoid. The electromagnetic valve driving device for an internal combustion engine according to any one of claims 1 to 3, wherein the position is a position that greatly affects the position. 5. The second predetermined position is energized to the valve-opening solenoid or the valve-closing solenoid more than the first predetermined position, and the armature thereafter is absorbed by the solenoid. 5. The electromagnetic valve driving device for an internal combustion engine according to claim 4, wherein the position is a position that has a small influence on how it is absorbed. 6. A parameter detected by the speed parameter detecting means is a speed of the valve, and a target value set by the target parameter setting means is a target speed of the valve with respect to a position of the valve. The electromagnetic valve driving device for an internal combustion engine according to any one of claims 1 to 5, characterized in that: 7. A rod that moves integrally with a valve in a valve closing direction or a valve opening direction, an armature provided integrally around the rod, a valve-closing spring and a valve that urge the valve in the valve closing direction. A valve-opening spring that biases in the valve direction, a valve-closing solenoid that is provided at a predetermined interval on one end face side of the armature, sucks the armature, and holds the valve closed; A solenoid for opening the valve, which is provided at a predetermined interval on the other end face side of the armature and absorbs the armature to hold the valve open, and energizes and controls the solenoid for opening the valve and the solenoid for closing the valve. An electromagnetic valve driving device comprising: a target speed setting unit that sets a target speed of the valve such that the valve is accurately seated in accordance with an operation region; and Valve speed detecting means for detecting the degree, valve position detecting means for detecting the position of the valve lift, the energization control means, the position of the valve detected by the valve position detecting means the armature is When the valve reaches a predetermined position immediately before being absorbed by the solenoid, the valve is opened based on a target speed of the valve set by the target speed setting means and a valve speed detected by the valve speed detection means. An electromagnetic type of an internal combustion engine comprising: an energization ON timing setting unit that sets energization ON timing to a solenoid for a valve and a solenoid for closing the valve; and an energization amount setting unit that sets a subsequent energization amount. Valve drive.