JP2006342937A - Electromagnetic clutch unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the electromagnetic clutch mechanism that can satisfy both of the retention of the response performance and the reduction of power consumption. <P>SOLUTION: Two coils, i.e. a main electromagnetic coil 1 formed by winding a large diameter copper wire with a small number of turns and an auxiliary electromagnetic coil 2 formed by winding a small diameter copper wire with a large number of turns, are provided on a yoke 3 of an electromagnetic actuator section A with an armature 4 for producing the pushing force in a clutch pack 7. A large electromagnetic attraction force is demonstrated by applying electric power to the main electromagnetic coil 1 when starting pressing the clutch pack 7. After the clutch pack 7 is engaged, the electric power is switched to the auxiliary electromagnetic coil 2 and the pressing condition of the clutch pack 7 is maintained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electromagnetically operated clutch device, and more particularly to an electromagnetic clutch device suitable for use in combination with a transmission of an automobile.

  A clutch is almost inevitable in the power train of an automobile, but in recent years, an automobile called a so-called automatic car (automatic car) that does not require a clutch operation has become mainstream. In the case of this automatic vehicle, it is common to use a fluid torque converter, so-called torque converter, but more recently, automatic transmissions using only a gear transmission mechanism without using a torque converter have been put into practical use. Progressing and contributing to energy savings by improving fuel economy.

  By the way, in the case of an automatic transmission using only this gear transmission mechanism, it is necessary to automate the operation of the clutch. Therefore, an electromagnetic clutch is usually used. At this time, the clutch is activated by energizing the coil of the electromagnet. As a conventional technique, a so-called energizing engagement type electromagnetic clutch device has been proposed (see, for example, Patent Document 1).

The electromagnetic clutch device according to this prior art uses a so-called movable iron core type electromagnet as an electromagnetic actuator, and a movable iron piece called an armature is arranged on an iron core called an yoke provided with an electromagnetic coil, and the electromagnetic coil is energized. If not, the clutch is released by the force of the spring, but when the electromagnetic coil is energized, a magnetic field is generated in the yoke and the armature is attracted, so that the clutch can be engaged using this. It is a thing.
JP 2004-278778 A

  The above prior art does not give sufficient consideration to the fact that the operation responsiveness of the clutch depends on the force of the electromagnet, and there is a problem in maintaining both the response performance of the clutch and reducing the power consumption.

  In the case of an electromagnetic clutch device of energized engagement operation type, in order to perform the engagement operation of the clutch quickly, it is necessary to obtain a strong force from the electromagnet. Therefore, it is necessary to flow a large current through the electromagnetic coil of the electromagnet. Power consumption increases. On the other hand, if the current flowing through the electromagnetic coil of the electromagnet is reduced in order to reduce power consumption, a strong force cannot be generated. Therefore, the clutch engagement operation is delayed and a delay occurs until the clutch is completely engaged. End up.

  Therefore, in the prior art, it is necessary to keep a large current flowing through the electromagnetic coil of the electromagnet during the clutch engaging operation, which causes a problem in maintaining both the response performance of the clutch and reducing the power consumption.

  An object of the present invention is to provide an electromagnetic clutch mechanism capable of maintaining both response performance and reducing power consumption.

  An object of the present invention is to provide an electromagnetic clutch mechanism that is fastened by a movable iron piece type electromagnetic actuator having a yoke and an armature, wherein the yoke is provided with at least two electromagnetic coils, and energization of the at least two electromagnetic coils is performed by a clutch. This is achieved by switching from one electromagnetic coil to the other electromagnetic coil at the start of the fastening operation and at the fastening maintenance period after the clutch is engaged.

  At this time, at least one electromagnetic coil of the electromagnetic coil is an auxiliary electromagnetic coil in which a copper wire having a smaller cross-sectional area than the other electromagnetic coils is wound more times than the other electromagnetic coils, and the clutch is engaged. The above object can be achieved even when the other electromagnetic coil is energized at the start and the auxiliary electromagnetic coil is energized during the engagement maintaining period after the clutch is engaged.

  Next, at this time, the at least two electromagnetic coils are coils of the same specification, and the coils of the same specification are energized in parallel at the start of the engagement operation of the clutch, and during the engagement maintenance period after the clutch is engaged The above-described object can be achieved even if the coils having the same specifications are energized in series.

  At this time, when at least one electromagnetic coil of the at least two electromagnetic coils is energized and the clutch is engaged, other non-energized electromagnetic coils are stepped or conformed to the stepped shape. When the gap between the yoke and armature is calculated from the impedance detected from the current response obtained when this voltage is applied, and the clutch is operated according to the calculation result of this cap The above object can also be achieved by correcting the energization current.

  Further, at this time, when energization is started in at least one of the at least two electromagnetic coils, another non-energized electromagnetic coil is used as a magnetic flux detection coil, and the energization is started. The voltage value and / or current value induced in the magnetic flux detection coil by the magnetic flux generated from the applied electromagnetic coil is measured, the magnetic flux is calculated, and the electromagnetic coil that has been energized is energized. Even if the current is corrected according to the calculated magnitude of the magnetic flux, the above object can be achieved.

  According to the present invention, by using a plurality of electromagnetic coils of the electromagnetic actuator and optimizing the method of using the electromagnetic coils, it is possible to reduce the electric power required for maintaining the engagement of the clutch while ensuring responsiveness.

  At this time, the generated magnetic field is measured using an electromagnetic coil that does not contribute to the generation of the attractive force, and the magnetic field is controlled, thereby improving the accuracy of the operating force of the electromagnetic actuator and accurately increasing the clutch transmission torque. Can be adjusted.

  Similarly, using an electromagnetic coil that does not contribute to the generation of attractive force at this time, the gap between the yoke and the armature is measured, and the control current is corrected according to the gap to improve the accuracy of the operating force of the electromagnetic actuator. The transmission torque of the clutch can be adjusted with high accuracy.

  Hereinafter, the electromagnetic clutch device according to the present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 shows an embodiment in which the present invention is applied to a power train that is a power transmission mechanism of an automobile. The electromagnetic clutch mechanism is roughly divided into an electromagnetic actuator part A and a clutch part C as shown in the figure.

  First, the electromagnetic actuator section A includes a main electromagnetic coil 1 and an auxiliary electromagnetic coil 2, a yoke 3 that functions as a yoke, and an armature 4 that functions as a movable iron piece, and is configured as a movable iron piece type electromagnetic actuator. In addition, the clutch portion C includes an outer housing 5 and a slider 6, a multi-plate clutch pack 7, a rib 8, and an inner housing 9, and is configured as a multi-plate clutch.

  Here, the slider 6 is rotatably held by the rib 8 via the ball bearing 10, and the armature 4 is fixed to the other end of the slider 6. At this time, the space between the outer housing 5 and the rib 8 is fixed. A ring spring 11 acting as a return spring is interposed so that the rib 8 is normally separated from the outer housing 5, the armature 4 is separated from the yoke 3, and the clutch pack 7 is kept loose. It has become.

  At this time, the outer housing 5 is splined to the input shaft 21 and the inner housing 9 is splined to the output shaft 22 as shown in the figure. The input shaft 21 is held by an input shaft ball bearing 31 and the output shaft 22 is held by a hub ball bearing 32.

  The clutch back 7 is a pack composed of a so-called multi-plate clutch in which a plurality of friction plates are overlapped. At this time, one set of friction plates is fixed to the outer housing 5, and the other set of friction plates is the inner housing. 9 is fixed. Then, these one set of friction plates and the other set of friction plates are alternately overlapped to form the clutch back 7, so that when this clutch back 7 is loosened, torque is not transmitted, Torque will be transmitted, and the function as a clutch will be obtained.

  Next, the details of the electromagnetic actuator part A will be described with reference to FIG. 2. The actuator part A is composed of the main electromagnetic coil 1, the auxiliary electromagnetic coil 2, the yoke 3, and the armature 4 as described above. .

  First, the yoke 3 is formed as a circular ring member having a circular shape when viewed from the front direction, that is, the direction along the center of the input shaft 21 and the output shaft 22 in FIG. 1, and has an annular edge 3a around the periphery thereof. In addition, an annular groove 3b is provided in the edge 3a. The armature 4 is also formed in a circular shape like the front shape of the yoke 3. At this time, the armature 4 keeps a predetermined gap G with respect to the edge 3 a of the yoke 3. It arrange | positions so that the opening part of 3a may be plugged up.

  At this time, the yoke 3 and the armature 4 are made using a soft magnetic material with little residual magnetization, such as SUS430 material, SUS420 material, electromagnetic pure iron, or electromagnetic soft iron. This is because if the remanent magnetization is high, a magnetic attraction force remains between the yoke 3 and the armature 4 even when no current is applied, resulting in complicated control.

  Next, the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 are formed by winding a copper wire in an annular shape and molding it with a synthetic resin or the like, and after arranging it in the groove 3b, the outer C ring 3c and the inner C coil 3 By fitting the ring 3d, it is fixed in the groove 3b.

  Accordingly, if the main electromagnetic coil 1 or the auxiliary electromagnetic coil 2 is energized (current is supplied), a magnetomotive force appears in the electromagnetic coil, thereby causing a magnetic flux to flow in the magnetic circuit composed of the yoke 3 and the armature 4. A magnetic field is generated in the gap G, and an electromagnetic attractive force is applied to the armature 4.

  At this time, the armature 4 can move only in the direction of narrowing the gap G with respect to the yoke 3, and is held in a restrained state in the other directions. Therefore, when the main electromagnetic coil 1 or the auxiliary electromagnetic coil 2 is energized, the armature 4 moves toward the yoke 3 while narrowing the gap G. As a result, the slider 6 and the rib 8 are moved to the left in FIG. Move against 11 repulsive forces.

  As a result, the rib 8 presses the clutch pack 7, and the clutch is engaged and torque is transmitted from the input shaft 21 to the output shaft 22. Will be.

  By the way, the above operation is the same as that in the case of a general energization fastening type electromagnetic clutch device, but in this embodiment, the electromagnetic coil constituting the electromagnetic actuator part A is the main electromagnetic coil 1 and the auxiliary electromagnetic coil. Two types of coils 2 are provided. Based on this premise, it is characteristic that the energization state for these two types of electromagnetic coils is controlled in a predetermined manner when the clutch is engaged and when the clutch is released. This operation will be described below.

  First, in this embodiment, as the main electromagnetic coil 1, a thick copper wire having a relatively large wire diameter is used which is also wound with a relatively small number of turns. A thin copper wire with a small diameter is wound with a relatively large number of turns.

  In this embodiment, the main electromagnetic coil 1 is large and the auxiliary electromagnetic coil 2 is small. However, this does not limit the size of the electromagnetic coil, and depends on the wire diameter and excitation current conditions of the electromagnetic coil. May be the opposite size or the same size. Also, the arrangement of the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 shown in FIG.

  Further, in this embodiment, the front shapes of the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 are annular. However, if the same effect can be obtained, the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 may have a rectangular shape or a different shape. Needless to say. The same applies to the shapes of the yoke and armature.

  Returning to the explanation of the operation, if it is assumed that the main electromagnetic coil 1 is energized here, the magnetic flux circulates between the armature 4 and the yoke 3 as described above, and the yoke 3 is caused by the gap G between the yoke 3 and the armature 4. Electromagnetic attractive force is generated between the armature 4 and the armature 4. This force is transmitted to the slider 6 connected to the armature 4 and then to the rib 8. By the movement of the rib 8, a pressing force to the clutch pack 7 is given. Current supply to the main electromagnetic coil 1 at this time is performed by an electromagnetic clutch control device (not shown).

  At this time, since the main electromagnetic coil 1 is a coil in which a copper wire having a large wire diameter is wound with a small amount, a large current can be supplied to generate a strong electromagnetic attracting force. Even in a situation where responsiveness is required, it is possible to cope sufficiently. As a result, the current value of the main electromagnetic coil 1 can be adjusted in accordance with the change in transmission torque required for the clutch mechanism, and torque transmission as required can be provided.

Here, in the case of such an electromagnetic actuator using a yoke and an armature, once the armature is attracted to the yoke, the magnetomotive force by the electromagnetic coil necessary to maintain the state is such that energization starts and the armature Compared to the magnetomotive force required at the beginning of being attracted to the yoke, there is a characteristic that it can be considerably smaller. This is because the magnetic attractive force by the gap G is approximately inversely proportional to the square of the size of the gap G (∝1 / G ² ).

  Thus, in this embodiment, when the clutch is engaged, the energization of the auxiliary electromagnetic coil 2 is started at this point, and at the same time, the energization of the main electromagnetic coil 1 is stopped. At this time, as described above, the auxiliary electromagnetic coil 2 is a coil in which many thin copper wires are wound, so that the necessary magnetic attractive force can be sufficiently obtained with a considerably small current. Therefore, the armature 4 is also applied to the yoke 1 at this time. The sucked state can be maintained, and the clutch can be kept engaged.

  As described above, since the main electromagnetic coil 1 is reduced in the number of turns and energized with a large current, the power consumption is large and if the main electromagnetic coil 1 is continuously used, a great energy loss is caused. However, in the case of this embodiment, since the main electromagnetic coil 1 is switched to the auxiliary electromagnetic coil 2 having a large number of turns at the timing when the clutch is kept in the engaged state, the power consumption can be reduced while maintaining the transmission torque of the clutch. As a result, energy loss can be suppressed.

  Next, the control logic according to this embodiment will be described with reference to FIG. Here, in FIG. 3, since the main purpose is switching between the current of the main electromagnetic coil 1 and the current of the auxiliary electromagnetic coil 2, the current value is shown in a trapezoidal shape without change. The current value changes depending on the operating condition of the clutch.

  First, in FIG. 3, the time from the time t0 to the time t1 on the horizontal axis is a time zone in which an early response is required for the clutch transmission torque, and the pressing force applied to the clutch pack 7 by energizing the main electromagnetic coil 1 is shown. Control. At this time, a change in the magnetic flux by the main electromagnetic coil 1 is detected by the auxiliary electromagnetic coil 2 to measure whether or not the intended magnetic flux change is obtained, and the current in the main electromagnetic coil 1 is corrected based on the measured value. This will be described in detail later.

  Next, in FIG. 3, the clutch is in the engaged state from time t1 and is maintained. Therefore, energization of the auxiliary electromagnetic coil 2 is started at the time t1, and the current value of the main electromagnetic coil 1 is started to decrease from the time when the attractive force by the auxiliary electromagnetic coil 2 is sufficiently obtained, and the electromagnetic wave generating the magnetic flux. The coil is switched from the main electromagnetic coil 1 to the auxiliary electromagnetic coil 2.

  Therefore, after time t2, the clutch is pressed only by the magnetic force generated by the auxiliary electromagnetic coil 2, and the transmission torque is maintained. That is, after time t2, the clutch engagement maintenance (lock state) by the auxiliary electromagnetic coil 2 is given.

  Therefore, according to this embodiment, it is possible to ensure the continuous magnetic force control function of the electromagnetic clutch and maintain the engagement with low power consumption, and to maintain the engagement of the clutch while ensuring the responsiveness of the clutch mechanism. It is possible to reduce the electric power required for the transmission and to improve the control accuracy of the transmission torque.

  By the way, when a plurality of electromagnetic coils are provided and there is a period in which one is energized and the other is not energized as in this embodiment, one of the electromagnetic coils has a step shape or a waveform conforming to the step shape. The impedance can be measured by applying a voltage of. This is shown in FIG. 3 by describing the period from time t0 to time t1 as “magnetic flux detection by the auxiliary coil”. The operation at this time will be described below with reference to the block diagram of FIG.

  As shown in FIG. 4, first, the electromagnetic clutch control device 40 energizes at least one of the electromagnetic coils (the main electromagnetic coil 1 in this embodiment). At this time, it is assumed that no exciting current is applied to the other electromagnetic coils (the auxiliary electromagnetic coil 2 in this embodiment).

  Then, when the current supplied from the electromagnetic clutch control device 40 to the main electromagnetic coil 1 reaches a steady state and the magnetic attractive force acting on the armature 4 becomes constant, the command current is next. The controller 41 applies a stepped voltage or a voltage having a waveform conforming to the stepped shape to the electromagnetic coil that is not energized, that is, in this case, the auxiliary electromagnetic coil 2.

  At this time, the measuring instrument 42 measures the current response of the auxiliary electromagnetic coil 2, and the calculator 43 calculates the impedance of the auxiliary electromagnetic coil 2 from the measurement result of the current response, and the yoke 3 and the armature 4 are calculated from this impedance. The magnetic permeability of the magnetic circuit consisting of is calculated.

  As a result, the magnetic attraction force appearing between the yoke 3 and the armature 4 is estimated by the magnetic permeability. Next, the current controller 44 generates the necessary magnetic attraction force from the estimation result of the magnetic attraction force. Thereafter, the current value supplied to the main electromagnetic coil 1 is controlled according to the estimation result of the magnetic attractive force.

  That is, since the impedance is detected from the current response obtained when the voltage is applied to the electromagnetic coil, the size of the gap G between the yoke 3 and the armature 4 is calculated from the detection result of the impedance. The energization current when the clutch is operated can be corrected according to the calculation result. Therefore, according to this embodiment, an optimal clutch engagement force can be always applied to the clutch pack 7.

  Next, another embodiment of the present invention will be described. In the embodiment described above, when the energization of the main electromagnetic coil 1 is started, the energization of the auxiliary electromagnetic coil 2 is simultaneously performed as described in FIG. Although it is an example of the operation mode which is not started, there may be a mode in which an excitation current is supplied to both depending on conditions.

  Therefore, next, an embodiment in which an excitation current is supplied to both according to conditions will be described with reference to FIG. 5. In this case, the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 are energized simultaneously at time t0. Then, the energization of the auxiliary electromagnetic coil 2 is stopped at a time t1, and the energization of the main electromagnetic coil 1 is stopped at the final time t2, and the energization of the auxiliary electromagnetic coil 2 is started at the same time. is there.

  Accordingly, in this embodiment, both the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 are energized at the start of the clutch fastening operation. Specifically, in this case, as shown in FIG. After energizing both the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 at time t0, the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 are energized until time t1 when the gap G between the armature 4 and the yoke 3 becomes sufficiently small. to continue.

  When the time t1 is reached, the energization of the auxiliary electromagnetic coil 2 is once stopped, the suction of the armature 4 is continued only by the energization of the main electromagnetic coil 1, and the armature 4 reaches a predetermined position at the time t2. Then, the energization of the auxiliary electromagnetic coil 2 is resumed, and the energization of the main electromagnetic coil 1 is stopped.

  Then, after this time t2, the armature 4 is kept attracted only by the magnetic attraction force of the auxiliary electromagnetic coil 2, and the pressing of the clutch pack 7 is maintained. That is, after the time t2, the clutch fastening maintenance (lock state) by the auxiliary electromagnetic coil 2 is performed.

  In this case, energization of the auxiliary electromagnetic coil 2 is stopped from time t1 to time t2, but at this time, the magnetic flux generated by the main electromagnetic coil 1 is linked to the auxiliary electromagnetic coil 2. In addition, during this period, the armature 4 continues to be attracted by the action of the main electromagnetic coil 1, so that the generated magnetic flux continues to change.

  Therefore, if the change of the magnetic flux is detected by the auxiliary electromagnetic coil 2, it is possible to measure whether or not the desired magnetic flux required, and hence the desired magnetic attraction force is generated, and thereby the amount of current supplied to the electromagnetic coil. Can be controlled.

  That is, in this case, when energization is started in at least one of the at least two electromagnetic coils, another non-energized electromagnetic coil is used as a magnetic flux detection coil, and the energization is started. The voltage value and / or current value induced in the magnetic flux detection coil by the magnetic flux generated from the electromagnetic coil is measured, the magnetic flux is calculated, and the current supplied to the electromagnetic coil that has started energization is calculated. The correction is made according to the magnitude of the calculated magnetic flux.

  Therefore, according to this embodiment, it is possible to stabilize the clutch fastening maintenance control by controlling the continuous magnetic force of the electromagnetic actuator and to stabilize the operation control of the electromagnetic actuator. Fuel consumption can be improved.

  By the way, in embodiment described above, although the main electromagnetic coil 1 and the auxiliary | assistant electromagnetic coil 2 are comprised using the coil from which a specification differs, two electromagnetic coils of the same specification are arrange | positioned and two electromagnetic coils are used. By switching the connection, the main electromagnetic coil and the auxiliary electromagnetic coil may be selectively used. Hereinafter, the embodiment described above will be described.

  First, the electromagnetic coil is schematically represented as a coil A as shown in FIG. Therefore, when a plurality of, for example, two coils A are used and connected in series, the result is as shown in FIG. 6 (b), and when connected in parallel, the result is as shown in FIG. 6 (c).

The resistance R of the time coil A, the voltage of the power supply and is V, a current flowing through the coil in the case of the series of FIG. 6 (b) I _S, the current in the case of a parallel shown in FIG. 6 (c) When I _P , Current I _S = V / 2R, and current I _P = V / R × 2, so if voltage V is the same, current I _S is 1/4 of current I _P , that is, I _S × 4 = I. Become _P.

Further, the strength of the magnetic field generated by the coil at this time, that is, the magnetomotive force, is the product of the number of turns of the coil and the current flowing through the coil, and is proportional to the current of the coil A. Therefore, the series shown in FIG. magnetomotive force 2 × T × I _S, and the case of the parallel of FIG. 6 (c) becomes 2 × T × I _P in the case of. Here, I _S × 4 = I _P , that is, the current I _S is ¼ of the current I _P , so in the case of the series of FIG. 6B, the coil current is the case of the parallel of FIG. The magnetomotive force is also 1/4.

  Therefore, in the embodiment described here, instead of the main electromagnetic coil 1 and the auxiliary electromagnetic coil 2 in FIGS. 1 and 2, two electromagnetic coils having the same specifications, in which copper wires having the same wire diameter are applied the same number of turns, are used. When mounted as the main electromagnetic coil by the above-described electromagnetic clutch control device and mounted in the same winding direction, as shown in FIG. 6 (c), when connected in parallel and operated as an auxiliary electromagnetic coil, As shown in FIG. 6 (b), they are connected in series.

  According to this embodiment, the same function as the embodiment described in FIGS. 1 and 2 can be obtained, and the same effect can be obtained, and the configuration can be configured with the same specification coil. Can be obtained.

  Here, the case where two coils A are used has been described, but if the system is similarly used by switching between serial connection and parallel connection, it may be implemented using three or more coils. good.

  By the way, the embodiment in the case where the present invention is applied to the single clutch structure has been described above, but it goes without saying that the present invention can also be applied to the dual clutch structure, and an example thereof is FIG. In the electromagnetic clutch device according to the present invention, first and second electromagnetic clutches are concentrically arranged to control input of a dual clutch transmission.

  In FIG. 7, first, the first electromagnetic clutch is arranged inside the concentric circle, and the electromagnetic coil portion 60 composed of two electromagnetic coils of a main electromagnetic coil and an auxiliary electromagnetic coil, an armature 61, a yoke 62, and an operating force are provided. The slider 63 is a means for transmitting and is used for pressing the first clutch pack 80 installed inside the dual transmission.

  Next, the second second electromagnetic clutch is arranged outside the concentric circle, which also has an electromagnetic coil portion 70 comprising two electromagnetic coils, a main electromagnetic coil and an auxiliary electromagnetic coil, an armature 71, a yoke 72, and a clutch pack. The slider 73 is a means for transmitting the operating force to the second transmission, and is used for pressing the second clutch pack installed outside the dual transmission.

  Therefore, according to this embodiment, it is possible to maintain the clutch engagement by controlling the continuous magnetic force of the electromagnetic actuator and to stabilize the operation control of the electromagnetic actuator, and to improve the fuel consumption of the automobile using the dual transmission for the power train. Can be improved.

  FIG. 7 shows an embodiment in which two electromagnetic clutches are used. However, the electromagnetic clutch may be one by using another mechanical transmission mechanism, and there may be three or more. Needless to say, it may be.

It is sectional drawing which shows one Embodiment of the electromagnetic clutch mechanism by this invention. It is sectional drawing which shows the electromagnetic actuator part in one Embodiment of this invention. It is a characteristic view for demonstrating the control method of the electromagnetic clutch mechanism in one Embodiment of this invention. It is a block diagram which shows an example of the control method of the electromagnetic clutch mechanism in one Embodiment of this invention. It is a characteristic view for demonstrating the control method of the electromagnetic clutch mechanism in other one Embodiment of this invention. It is explanatory drawing of the electromagnetic coil in another one Embodiment of this invention. It is sectional drawing which shows one Embodiment at the time of applying this invention to a dual clutch transmission.

Explanation of symbols

A: Electromagnetic actuator part C: Clutch part 1: Main electromagnetic coil 2: Auxiliary electromagnetic coil 3: Yoke 3a: Ring edge 3b: Ring groove 3c: Outer C ring 3d: Inner C ring 4: Armature 5: Outer housing 6: Slider 7: Clutch pack 8: Rib 9: Inner housing 10: Ball bearing 11: Ring spring 21: Input shaft 22: Output shaft 31: Input shaft ball bearing 32: Hub ball bearing 40: Electromagnetic clutch control device 41: Command Current controller 42: Measuring instrument 43: Calculator 44: Current controller 60: Electromagnetic coil of the first electromagnetic clutch 61: Armature of the first electromagnetic clutch 62: Yoke of the first electromagnetic clutch 63: Slider 70 of the first electromagnetic clutch : Electromagnetic coil of the second electromagnetic clutch 71: Armature of the second electromagnetic clutch 72: 2 electromagnetic clutch yoke 73: second electromagnetic clutch slider 80: first clutch pack 81: second clutch pack

Claims (6)

In an electromagnetic clutch mechanism that is fastened by a movable iron piece type electromagnetic actuator having a yoke and an armature,
Providing at least two electromagnetic coils in the yoke;
An electromagnetic clutch characterized in that the energization of at least two electromagnetic coils is switched from one electromagnetic coil to the other electromagnetic coil at the start of clutch engagement operation and the engagement maintaining period after clutch engagement. mechanism. The electromagnetic clutch mechanism according to claim 1,
At least one of the electromagnetic coils is an auxiliary electromagnetic coil in which a copper wire having a smaller cross-sectional area than the other electromagnetic coils is wound more times than the other electromagnetic coils.
At the time of starting the fastening operation of the clutch, the other electromagnetic coil is energized,
An electromagnetic clutch mechanism, wherein the auxiliary electromagnetic coil is energized during an engagement maintaining period after the clutch is engaged. The electromagnetic clutch mechanism according to claim 1,
The at least two electromagnetic coils are coils of the same specification;
At the start of the engagement operation of the clutch is energized in parallel to the coil of the same specification,
The electromagnetic clutch mechanism is configured to be energized in series with the coil of the same specification during the engagement maintaining period after the clutch is engaged. The electromagnetic clutch mechanism according to claim 1,
When at least one electromagnetic coil of the at least two electromagnetic coils is energized and the clutch is engaged, a voltage having a waveform corresponding to a step shape or a step shape is applied to another non-energized electromagnetic coil. Means to apply,
From the impedance detected from the current response obtained when applying this voltage, calculate the gap between the yoke and the armature,
An electromagnetic clutch mechanism configured to correct an energization current when the clutch is operated according to a calculation result of the cap. The electromagnetic clutch mechanism according to claim 1,
When energization of at least one electromagnetic coil of the at least two electromagnetic coils is started, another non-energized electromagnetic coil is used as a magnetic flux detection coil, and The voltage value and / or current value induced in the magnetic flux detection coil by the generated magnetic flux is measured, the magnetic flux is calculated, and the current supplied to the electromagnetic coil that has started energization is calculated. An electromagnetic clutch mechanism configured to correct according to the magnitude of magnetic flux. The electromagnetic clutch mechanism according to any one of claims 1 to 5,
An electromagnetic clutch mechanism characterized in that the electromagnetic clutch mechanism constitutes a clutch provided in a power transmission mechanism of an automobile.

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