JP2017203501A - Clutch operating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an operability of a clutch pedal by making its operational feeling to be changed to a more normal operational feeling.SOLUTION: A master cylinder [45], a slave cylinder [50] and a changing-over cylinder [65] communicated with a cylinder [60] for pseudo-reaction force comprises: a first piston [71] biased by a spring [67]; a second piston [72] to which a biasing force of the spring [67] is transmitted through the first piston [71]; an actuator mechanism [51] for driving the second piston [72]; a first oil chamber [81] formed at a side of the spring [67] in respect to the first piston [71] to communicate with the slave cylinder [50]; a second oil chamber [82] formed between the first piston [71] and the second piston [72] and communicated with the master cylinder [45] and the cylinder [60] for pseudo-reaction force; and a first opening or closing valve [95] for opening or closing a third oil passage [93] communicated with the second oil chamber [82] and the cylinder [60] for pseudo-reaction force.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a clutch operating device including a hydraulic mechanism for hydraulically operating a clutch mechanism that connects and disconnects a driving force transmitted from a driving source of a vehicle to driving wheels.

  BACKGROUND ART Vehicles such as automobiles are provided with a clutch device that transmits or interrupts driving force from an engine (drive source) to a transmission. This clutch device includes a mechanism that operates a friction clutch (clutch mechanism) in response to an operation of an operator such as a clutch pedal. That is, when the dull is stepped on the clutch, the release fork and the release bearing move and the clutch is disengaged. In such a clutch device, when the power transmission means from the clutch pedal to the clutch device is hydraulic, a hydraulic circuit (hydraulic mechanism) for supplying hydraulic pressure is provided between the clutch pedal and the clutch device. ing.

  By the way, in recent years, in order to improve the fuel consumption (fuel consumption rate) of the vehicle, there is a traveling mode (so-called coasting mode) in which the transmission of the driving force by the friction clutch is cut off while the vehicle is traveling at a relatively high speed. Possible vehicles are being developed. In a vehicle capable of such a coasting mode, a system including a by-wire clutch operating device instead of the hydraulic clutch operating device as described above has been proposed as an automatic coasting system. However, since the by-wire type clutch operating device does not have a hydraulic circuit that can operate the clutch mechanism by operating the clutch pedal (switching connection / disconnection), in the unlikely event that a failure occurs in the clutch operating device ( The problem is that manual operation of the friction clutch by hydraulic pressure is not possible during fail-safe operation.

  On the other hand, a clutch operating device having a coasting mode actuator in addition to a conventional hydraulic mechanism has also been proposed. This type of clutch operating device, for example, as shown in Patent Documents 1 and 2, executes manual connection / disconnection means for performing manual connection / disconnection of the clutch by operating the clutch pedal, and performs automatic connection / disconnection of the clutch by inputting a predetermined signal. Automatic connection / disconnection means, and switching control means for switching between manual connection / disconnection and automatic connection / disconnection.

Japanese Patent Laid-Open No. 11-6530 Japanese Patent Laid-Open No. 04-231728

  However, in the clutch operation devices described in Patent Documents 1 and 2, when the driver operates the clutch pedal during the automatic connection / disconnection operation of the clutch, a sense of incongruity due to a difference from the operation feeling during the normal manual connection / disconnection operation. May occur. Also, the clutch pedal operation feeling (feeling) differs between when the friction material of the clutch is new and when it is worn. For this reason, if the driver does not operate the clutch pedal during the automatic connection / disconnection operation of the clutch, an appropriate operation feeling corresponding to the degree of wear of the friction material of the clutch must be given. There is a possibility that the operation feeling may be uncomfortable. Furthermore, in the clutch operating device equipped with the mechanism for automatically connecting / disconnecting the clutch as described above, the clutch is connected if the mechanism for automatic connection / disconnection fails when the clutch is disconnected (disconnected state). You may not be able to. For this reason, there is a possibility that the operation of the clutch mechanism (connection / disconnection switching) by the normal operation of the clutch pedal may be disabled.

  The present invention has been made in view of the above-described points, and an object of the present invention is to improve the operability of the operator by making the operation sensation of the operator more natural. An object of the present invention is to provide a clutch operating device capable of operating a clutch mechanism with an operator even when a mechanism for automatic connection / disconnection fails.

  In order to solve the above problems, a clutch operating device according to the present invention includes a friction clutch mechanism (10) for connecting / disconnecting a driving force transmitted from a driving source of a vehicle to driving wheels, and a clutch mechanism (10) hydraulically. A clutch operating device (1) comprising a hydraulic mechanism (2) to be operated and a control means (100) for controlling the hydraulic mechanism (2), wherein the hydraulic mechanism (2) is an operator ( 3) A master cylinder (45) that is operated by the operation of 3), a slave cylinder (50) that generates hydraulic pressure for connecting and disconnecting the clutch mechanism (10), and a pseudo reaction force to the operation of the operation element (3) are generated. Of the counter reaction force cylinder (60), the switching cylinder (65) communicating with each of the master cylinder (45), the slave cylinder (50) and the pseudo reaction force cylinder (60), and the urging means (67) A first piston (71) urged in one direction in the switching cylinder (65) by a force, and a first piston (71) installed so as to be able to contact and separate from the first piston (71) A second piston (72) to which the urging force of the urging means (67) is transmitted via the actuator, and an actuator mechanism (51) for driving the second piston (72) based on a control command of the control means (100). The first oil chamber (81) formed on the biasing means (67) side with respect to the first piston (71) in the switching cylinder (65) and the first piston ( 71) and a second oil chamber (82) formed between the second piston (72), a first oil passage (91) communicating the slave cylinder (50) and the first oil chamber (71). , The second oil communicating the master cylinder (45) and the second oil chamber (82) (92), a third oil passage (93) communicating the pseudo reaction force cylinder (60) and the second oil chamber (82), and a third oil passage (based on the control command of the control means (100)) 93) and a first on-off valve (95) that switches between opening and closing, and with the first on-off valve (95) opened, the first on-off valve (95) is opened via the second piston (72) driven by the actuator mechanism (51). The first piston (71) is driven by the hydraulic pressure supplied from the master cylinder (45) to the second oil chamber (82) in the first operation mode for driving one piston (71) and the first on-off valve (95) closed. 71), the second operation mode for driving is configured to be switched.

  According to the clutch operating device of the present invention, in the automatic operation mode (first operation mode), the second oil chamber and the pseudo reaction force cylinder are communicated with each other through the third oil passage by opening the first on-off valve. Therefore, when the driver of the vehicle operates the operating element in the automatic operation mode, the reaction force from the pseudo reaction force cylinder is transmitted to the master cylinder, so that the operating element can be operated. On the other hand, a load caused by a reaction force from the pseudo reaction force cylinder can be applied. As a result, an operation load equivalent to the operation load of the operator at the time of normal manual connection / disconnection operation can be applied to the operation of the operator, so that there is no sense of incongruity even during execution of the automatic operation mode. Operability can be obtained.

  That is, in this clutch operating device, the clutch mechanism is operated in the manual operation mode (second operation mode) in the normal vehicle traveling state, but the driving force is transmitted by the clutch mechanism during traveling at a relatively high speed. When coasting to be shut off (automatic coasting) is performed, the clutch mechanism is operated in the automatic operation mode (first operation mode). When the driver of the vehicle operates the operating element during the automatic coasting, the load generated by the pseudo reaction force cylinder acts as a reaction force against the operation of the operating element, thereby reducing the operation of the operating element itself. In addition, the operability (operation feeling) can be secured.

  Alternatively, in this clutch device, the clutch mechanism is operated in the automatic operation mode (first operation mode) in a normal vehicle running state, and in this automatic operation mode, the operation is performed when the driver of the vehicle operates the operating element. It is possible to cause the clutch operating device to function as a so-called clutch-by-wire (CBW) mechanism by realizing the operation of the clutch corresponding to the above by the actuator mechanism by the control of the control means. Also in this case, since the load generated by the pseudo reaction force cylinder acts as a reaction force against the operation of the operation element, a good operation feeling of the operation element can be obtained. You can feel as if you were operating the clutch. In this case, the manual operation mode (second operation mode) can be used as a fail safe in the event that a failure occurs in the actuator mechanism or the like. Thereby, even in the event of a failure, the clutch mechanism can be operated, so that the clutch operating device with higher safety can be obtained.

  Further, in this clutch operating device, the pseudo reaction force cylinder (60) generates a reaction force corresponding to the operation load of the operation element (3) when the friction material (8) of the clutch mechanism (10) is worn. When the amount of wear of the friction material (8) is less than a predetermined amount, the reaction force by the pseudo reaction force cylinder (60) and the operation of the second piston (82) by the actuator mechanism (51) are set. The operation load of the operation element (3) may be generated by the reaction force of. In this case, when the amount of wear of the friction material (8) is smaller than a predetermined amount, the stroke amount of the pseudo reaction force cylinder (60) compared with the state where the friction material (8) is worn by a predetermined amount is reduced. It is preferable to compensate by driving the second piston (82) by the actuator mechanism (51).

  Here, in order to cope with the fact that the reaction force of the friction clutch changes according to the degree of wear of the friction material, the cylinder for the pseudo reaction force is a reaction corresponding to the operation load of the operator when the friction material is worn by a predetermined amount. It is set to generate force. As a result, when the driver of the vehicle operates the operating element in the automatic operation mode with the friction material worn by a predetermined amount, the operation feeling is equivalent to that in the manual operation mode. It is possible to obtain the operability of the operation element without feeling uncomfortable. On the other hand, in a state where the wear force of the friction material of the friction clutch is less than a predetermined amount, particularly in a state where the friction material of the friction clutch is not worn at all or is not worn at all (the friction material is new or close to it) A difference occurs in the operation feeling of the operator in the manual operation mode and the automatic operation mode. Therefore, here, the operating force of the operating element is determined by the reaction force generated by the pseudo reaction force cylinder and the reaction force generated by the operation of the second piston by the actuator mechanism so that the operating load of the operating element becomes a load corresponding to the degree of wear of the friction material. By generating a load, even when the driver of the vehicle operates the operating element in the automatic operation mode when the friction material is not worn or less worn, it is equivalent to the manual operation mode. It is possible to obtain an operation feeling, and it is possible to obtain the operability of the operation element (operability simulating operability when the friction material is new or close to it) without feeling uncomfortable due to the reaction force of the pseudo reaction force cylinder. Become. Thus, the operability of the operation element according to the degree of wear of the friction clutch can be ensured.

  Further, in this clutch operating device, the control means (100) uses the actuator mechanism (51) to follow the operation amount of the operating element (3) when switching from the first operation mode to the second operation mode. (72) is operated, and the first on-off valve (95) is closed when the operation amount of the operator (3) becomes an operation amount corresponding to a predetermined initial load by the operation of the vehicle driver. Good.

  According to this configuration, in the operation of the operation element when switching from the automatic operation mode to the manual operation mode, the load characteristic of the operation element is smoothly changed to smoothly switch the operation feeling of the operation element seamlessly. Is possible. Therefore, it is possible to improve the operation feeling of the operator by the driver of the vehicle.

  In this clutch operating device, any one of the first oil chamber (71), the slave cylinder (50), and the first oil passage (91), the second oil chamber (72), the master cylinder (45), and the second oil A fourth oil passage (94) connected to any one of the passages (92), and a second on-off valve that switches between opening and closing of the fourth oil passage (94) based on a control command from the control means (100). 96).

  According to this configuration, by including the fourth oil passage communicating the master cylinder and the slave cylinder and the second on-off valve capable of switching the opening and closing of the fourth oil passage, the actuator mechanism should malfunction. Even when the first piston cannot be operated via the second piston driven by the actuator mechanism, the second cylinder is opened via the fourth oil passage by opening the second on-off valve. The slave cylinder can be directly communicated. Therefore, the clutch mechanism can be operated by operating the operation element. Thereby, the tolerance with respect to failures, such as an actuator mechanism, can be improved.

  In addition, the code | symbol in said parenthesis shows the code | symbol of the component in embodiment mentioned later as an example of this invention.

  According to the clutch operating device of the present invention, the operability of the operating element can be improved by making the operating sensation of the operating element more natural, and the mechanism for automatic connection / disconnection should malfunction. Even in this case, the clutch mechanism can be operated by the operator.

It is a figure which shows the clutch operation apparatus which concerns on one Embodiment of this invention. It is a figure which shows the clutch operating device of automatic operation mode. It is a figure which shows the clutch operation apparatus of manual operation mode. It is a figure for demonstrating the procedure of transfer to automatic operation mode from manual operation mode. It is a graph which shows the relationship between the stroke (operation amount) of a clutch pedal and the pedal effort (load) of a clutch pedal in automatic operation mode and manual operation mode. It is a figure which shows the clutch operation apparatus of the state which opened the 2nd on-off valve.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a diagram showing a configuration of a clutch operating device according to an embodiment of the present invention. A clutch operating device 1 shown in the figure is a friction clutch for connecting and disconnecting a driving force arranged in a driving force transmission path (not shown) transmitted from a driving source such as an engine mounted on a vehicle to driving wheels. A mechanism 10 (hereinafter referred to as a clutch 10), a hydraulic mechanism (hydraulic circuit) 2 for operating the clutch 10 with hydraulic pressure, and a control unit (control means) 100 for controlling the hydraulic mechanism 2 are provided.

  The hydraulic mechanism 2 has a master cylinder 45 that sends hydraulic oil in conjunction with the operation of the clutch pedal (operator) 3, and the clutch 10 by the pressure of the hydraulic oil sent from the master cylinder 45 or a switching cylinder 65 described later. An operating mechanism 55 including a slave cylinder 50 to be engaged and disengaged, a pseudo reaction force cylinder 60 for generating a pseudo reaction force with respect to the operation of the clutch pedal 3, the master cylinder 45, and a slave cylinder of the operating mechanism 55 50 and a switching cylinder 65 communicating with each of the pseudo reaction force cylinders 60.

  In the switching cylinder 65, the first piston urged in one direction (right side in the figure) from one end (left end in the figure) inside the switching cylinder 65 by the urging force of the spring (biasing means) 67. 71 and a second piston 72 which is installed so as to be able to contact and be separated from the first piston 71 and to which the urging force of the spring 67 is transmitted via the first piston 71. The switching cylinder 65 includes an actuator mechanism 51 that drives the second piston 72 based on a control command from the control unit 100. Further, the first oil chamber 81 defined on the spring 67 side (left side in the drawing) with respect to the first piston 71 in the switching cylinder 65, and the first piston 71 and the second piston 72 in the switching cylinder 65. And a second oil chamber 82 defined therebetween. The volume of the first oil chamber 81 is set equal to the volume of the master cylinder 45 (the volume of hydraulic oil supplied from the master cylinder 45 when the clutch pedal 3 is fully depressed).

  A first oil passage 91 that communicates the first oil chamber 81 of the slave cylinder 50 and the switching cylinder 65; a second oil passage 92 that communicates the second oil chamber 82 of the master cylinder 45 and the switching cylinder 65; A third oil passage 93 that communicates the pseudo reaction force cylinder 60 and the second oil chamber 82 of the switching cylinder 65 is provided. The third oil passage 93 is provided with a first on-off valve 95 made of an electromagnetic valve. The first opening / closing valve 95 switches the opening / closing of the third oil passage 93 based on a control command from the control unit 100.

  Further, a bypass oil passage (fourth oil passage) 94 formed by connecting the slave cylinder 50 and the second oil passage 92 is provided. In the bypass oil passage 94, a second on-off valve 96 made of an electromagnetic valve is installed. The second on-off valve 96 switches opening and closing of the bypass oil passage 94 based on the control command of the control unit 100. The first on-off valve 95 and the second on-off valve 96 can be switched in their open / closed state separately by control (energization control) by the control unit 100.

  The master cylinder 45 is connected to an oil passage 47 a that communicates from the master cylinder 45 to the reservoir tank 47. Similarly, an oil passage 87 a communicating from the first oil chamber 81 to the reservoir tank 87 is connected to the first oil chamber 81 of the switching cylinder 65. The oil passage 87a is disposed at a position where the first oil chamber 81 and the reservoir tank 87 communicate with each other when the first piston 71 is not in operation.

  The clutch pedal 3 is installed so as to rotate in response to the depression operation. A piston rod 45 a of the master cylinder 45 is connected to the clutch pedal 3. The master cylinder 45 is connected to the operating mechanism 55 via a switching cylinder 65 and a bypass oil passage 94. The operating mechanism 55 includes a release bearing 6 that operates with the hydraulic pressure of the hydraulic mechanism 2, a diaphragm spring 7 for pressing a clutch disk (friction material) 8 of the clutch 10, and the like.

  In the clutch operating device 1, as an operation mode of the clutch 10 by the hydraulic mechanism 2, an automatic operation mode (first operation mode) in which the first piston 71 is driven via the second piston 72 driven by the actuator mechanism 51, and a master It is possible to switch between a manual operation mode (second operation mode) in which the first piston 71 is driven by the hydraulic pressure supplied from the cylinder 45 to the second oil chamber 82. Hereinafter, these operation modes will be described in detail.

  FIG. 2 is a diagram illustrating an automatic operation mode of the clutch operation device 1. In the automatic operation mode, the first piston 71 and the second piston 72 are in contact (contact) with each other by the biasing force of the spring 67, so that the first piston 71 and the second piston 72 are integrated in the switching cylinder 65. Operate (slid). Accordingly, the first piston 71 is driven by the actuator mechanism 51 via the second piston 72, whereby the hydraulic oil in the first oil chamber 81 is supplied to the slave cylinder 50 and the clutch 10 is operated. At this time, the first on-off valve 95 is opened, so that the working oil is supplied from the master cylinder 45 to the pseudo reaction force cylinder 60 through the second oil chamber 82 and the third oil passage 93. Thereby, a reaction force is generated by the pseudo reaction force cylinder 60 in response to the operation of the clutch pedal 3 by the driver of the vehicle.

  FIG. 3 is a diagram illustrating a manual operation mode of the clutch operation device 1. In the manual operation mode, the first on-off valve 95 is closed, and energization to the actuator mechanism 51 (motor M) is stopped (non-energization) to retract the second piston 72 (right end position in the switching cylinder 65). To place. As a result, hydraulic oil is supplied from the master cylinder 45 to the second oil chamber 82, so that the first piston 71 resists the biasing force of the spring 67 by the hydraulic pressure of the second oil chamber 82. Move to the side. As the hydraulic oil in the first oil chamber 81 is supplied to the slave cylinder 50, the release bearing 6 of the operating mechanism 55 moves in the forward direction. When the release bearing 6 moves in the forward direction, the diaphragm spring 7 is urged away from the clutch disk (friction material) 8 and the clutch 10 is disengaged. On the other hand, when the depression of the clutch pedal 3 is released (the clutch pedal 3 is returned), the release bearing 6 moves in the reverse direction by the restoring force (reaction force) of the diaphragm spring 7, so that the hydraulic oil in the slave cylinder 50 is first. Returning to the oil chamber 81, the clutch 10 is connected (engaged). In this way, the clutch 10 is operated by the hydraulic oil sent from the master cylinder 45 in accordance with the operation of the clutch pedal 3 by the driver of the vehicle.

  In this clutch operating device 1, the clutch 10 is operated in the manual operation mode in the normal vehicle running state, but the coasting (automatic course) that cuts off the transmission of the driving force by the clutch 10 during traveling at a relatively high speed. In the automatic operation mode, the clutch 10 is operated. When the driver of the vehicle operates the clutch pedal 3 during the automatic coasting, the load generated by the pseudo reaction force cylinder 60 acts as a reaction force against the operation of the clutch pedal 3. The operation itself of the clutch pedal 3 can be secured.

  That is, according to the clutch operating device 1 of the present embodiment, in the automatic operation mode (first operation mode) in which the first piston 71 is driven via the second piston 72 driven by the actuator mechanism 51, the switching cylinder 65 is used. Since the master cylinder 45 communicates with the pseudo reaction force cylinder 60 through the second oil chamber 82 and the third oil passage 93, the clutch pedal 3 can be operated by the driver even during the selection of the first operation mode. Operation is possible, and the natural reaction feeling of the clutch pedal 3 can be reproduced by the pseudo reaction force cylinder 60. Therefore, even when the automatic operation mode is being selected, the driver does not feel uncomfortable with the operation of the clutch pedal 3, and the clutch operating device 1 can always ensure a natural feeling of operation of the clutch pedal 3. Become.

  Here, a procedure for switching the operation mode of the clutch 10 by the clutch operating device 1 from the automatic operation mode (coating mode) to the manual operation mode will be described. FIG. 4 is a diagram for explaining this procedure. When switching from the automatic operation mode (coating mode) shown in FIG. 2 to the manual operation mode shown in FIG. 3, the second piston 72 is operated by the actuator mechanism 51 so as to follow the operation amount of the clutch pedal 3. Then, the first on-off valve 95 is closed when the operation amount of the clutch pedal 3 becomes an operation amount corresponding to a predetermined initial load by the operation of the vehicle driver. The predetermined initial load here is, for example, an operation amount corresponding to a load in a state where the driver does not operate the clutch pedal 3 and is simply placing his / her foot on the clutch pedal 3 (so-called foot-mounted state). (The operation amount corresponding to the play of the clutch pedal 3).

  As described above, in the clutch operating device 1 of the present embodiment, the clutch pedal 3 is smoothly changed by changing the load characteristic of the clutch pedal 3 in the operation of the clutch pedal 3 when switching from the automatic operation mode to the manual operation mode. It is possible to smoothly switch seamlessly to the sense of operation 3. Therefore, the feeling of operation of the clutch pedal 3 by the driver of the vehicle can be improved.

  FIG. 5 is a graph showing the relationship between the stroke (operation amount) S of the clutch pedal 3 and the depression force (load) F of the clutch pedal 3 in the automatic operation mode and the manual operation mode. As shown in the figure, in the manual operation mode in which the connection / disconnection of the clutch 10 is switched according to the operation of the clutch pedal 3, the friction material 8 of the clutch 10 is not worn at all or is not worn at all (the friction material 8 is new). The state of the load F with respect to the stroke S of the clutch pedal 3 is different between the state in which the friction material 8 of the clutch 10 is worn. That is, when the friction material 8 is not worn, the load characteristic indicated by X1 in the figure is obtained, and when the friction material 8 is worn, the load characteristic indicated by X2 in the figure is obtained. Thus, the load on the clutch pedal 3 tends to gradually increase as the friction material 8 of the clutch 10 wears.

  On the other hand, in the automatic operation mode in which the first piston 71 is driven via the second piston 72 driven by the actuator mechanism 51, the load of the clutch pedal 3 is caused by the reaction force generated by the pseudo reaction force cylinder 60. Since this is applied in a pseudo manner, this load is a constant load regardless of the degree of wear of the friction material 8 of the clutch 10. However, since the load of the clutch pedal 3 in the manual operation mode and the automatic operation mode varies greatly depending on the degree of wear of the friction material 8 of the clutch 10, the driver feels uncomfortable with the operation feeling of the clutch pedal 3. It will end up.

  Therefore, in the clutch operating device 1 of the present embodiment, in order to cope with the reaction force of the clutch 10 changing in accordance with the degree of wear of the friction material 8, the pseudo reaction force cylinder 60 is worn by a predetermined amount. It is set so that a reaction force corresponding to the operation load F2 of the clutch pedal 3 in the state is generated. Therefore, the load characteristic line when the driver of the vehicle operates the clutch pedal 3 in the automatic operation mode in a state where the friction material 8 is worn by a predetermined amount is indicated by a symbol Y1 in FIG. Thereby, it is possible to obtain the operability of the clutch pedal 3 without feeling uncomfortable due to the reaction force of the pseudo reaction force cylinder 60. That is, here, the operation load F1 of the clutch pedal due to the maximum reaction force of the pseudo reaction force cylinder 65 is set to be substantially equal to the operation load F2 of the clutch pedal 3 when the friction material 8 is worn by a predetermined amount. Yes.

  On the other hand, in a state where the friction material 8 of the clutch 10 is not worn at all or is not worn at all (the friction material 8 is new or close to it), the load characteristic Y1 at the time of wear when the pseudo reaction force cylinder 65 makes a full stroke. Therefore, when the friction material 8 is new, the pseudo reaction force cylinder cannot be fully stroked (the stroke amount of the pseudo reaction force cylinder 60 is insufficient). Therefore, when the friction material 8 is new, the shortage of the stroke of the pseudo reaction force cylinder 65 is compensated by the operation of returning the second piston 72 by driving the actuator mechanism 51, so that the friction material 8 reproduces the load characteristics when the friction material 8 is new. I am doing so. That is, when the friction material 8 is new or close to it, the load characteristic line when the driver of the vehicle operates the clutch pedal 3 in the automatic operation mode is Y2 in FIG. Therefore, even when the vehicle driver operates the clutch pedal 3 in the automatic operation mode with the friction material 8 not worn or with little wear, the uncomfortable feeling due to the reaction force of the pseudo reaction force cylinder 60 is felt. The operability of the clutch pedal 3 (operability simulating operability when the friction material 8 is new or close to it) can be obtained. Thus, the operability of the clutch pedal 3 corresponding to the degree of wear of the friction material 8 can be ensured.

  Note that A in the graph of FIG. 5 is a clutch pedal stroke at which the connection / disconnection of the clutch 10 is switched, and B is a clutch pedal stroke at the maximum stroke of the pseudo reaction force cylinder 65. Therefore, in the region where the clutch pedal stroke S is larger than B, the load due to the stroke of the first piston 71 against the urging force of the spring 67 becomes the load F of the clutch pedal 3. C is a position where the clutch pedal S contacts the stopper and the stroke stops (maximum value of the clutch pedal stroke S). The clutch pedal stroke B at the maximum stroke of the pseudo reaction force cylinder 65 is set to a value between the clutch pedal stroke A at which the connection / disconnection of the clutch 10 is switched and the maximum value C of the clutch pedal stroke S ( A <B <C).

  FIG. 6 is a view showing the clutch operating device 1 in a state in which the second opening / closing valve 96 is opened. The clutch operating device 1 of the present embodiment includes a bypass oil passage 94 that allows the master cylinder 45 and the slave cylinder to communicate with each other, and a second on-off valve 96 that can switch between opening and closing of the bypass oil passage 94. As a result, in the event that the actuator mechanism 51 fails, the first piston 71 cannot be operated via the second piston 72 driven by the actuator mechanism 51, as shown in FIG. Thus, since the master cylinder 45 and the slave cylinder 50 can be directly communicated with each other via the bypass oil passage 94 by opening the second on-off valve 96, the clutch 10 can be operated by operating the clutch pedal 3. It becomes like this. Therefore, resistance to failure of the actuator mechanism 51 can be improved.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible.

  For example, in the above embodiment, in the automatic operation mode (first operation mode) in which the first piston 71 is driven via the second piston 72 driven by the actuator mechanism 51, the second oil chamber 82 of the switching cylinder 65 and Although the master cylinder 45 communicates with the pseudo reaction force cylinder 60 via the third oil passage 93, the driver can operate the clutch pedal 3 even during the selection of the first operation mode. In this case, the control unit 100 can also perform control so that the operation of the clutch 10 by the actuator mechanism 51 is interlocked with the operation of the clutch pedal 3 by the driver.

  That is, by operating the clutch 10 by the actuator mechanism 51 in response to the operation of the clutch pedal 3 by the driver, the clutch operating device 1 can function as a so-called clutch-by-wire (CBW) mechanism. Specifically, the operation of the actuator mechanism 51 realizes the same operation as when the clutch 10 is operated by the operation of the clutch pedal 3 by the driver in the manual operation mode. According to this, it is possible to accurately operate the clutch 10 by the actuator mechanism 51 while giving the driver the feeling that the clutch 10 is operated by the hydraulic pressure via the master cylinder 45.

  In this case, as a fail-safe in the event that a failure occurs in the actuator mechanism 51 or the like, a manual operation mode (second operation mode) in which the first piston 71 is driven by the hydraulic pressure supplied from the master cylinder 45 to the second oil chamber 82. Operation mode) can be used. Thereby, even in the event of a failure, the clutch 10 can be operated reliably, so that a clutch operating device with higher safety can be obtained.

1 Clutch operating device 3 Clutch pedal 6 Release bearing 7 Diaphragm spring 8 Clutch disc (friction material)
10 Clutch (Clutch mechanism)
20 Hydraulic mechanism 45 Master cylinder 45a Piston rod 47 Reservoir tank 47a Oil passage 50 Slave cylinder 51 Actuator mechanism 55 Actuation mechanism 60 Pseudo reaction force cylinder 65 Switching cylinder 67 Spring (biasing means)
71 First piston 72 Second piston 81 First oil chamber 82 Second oil chamber 87 Reservoir tank 87a Oil passage 91 First oil passage 92 Second oil passage 93 Third oil passage 94 Bypass oil passage (fourth oil passage)
95 1st on-off valve 96 2nd on-off valve 100 Control unit (control means)

Claims (6)

A clutch operating device comprising: a friction type clutch mechanism for connecting / disconnecting a driving force transmitted from a driving source of a vehicle to driving wheels; a hydraulic mechanism for operating the clutch mechanism hydraulically; and a control means for controlling the hydraulic mechanism. There,
The hydraulic mechanism is
A master cylinder that is activated by operation of a controller by a vehicle driver;
A slave cylinder that generates hydraulic pressure for connecting and disconnecting the clutch mechanism;
A pseudo-reaction force cylinder that generates a pseudo-reaction force with respect to the operation of the manipulator;
A switching cylinder communicating with each of the master cylinder, the slave cylinder, and the pseudo reaction force cylinder;
A first piston biased in one direction in the switching cylinder by a biasing force of a biasing means;
A second piston which is installed so as to be able to contact and separate from the first piston and to which the urging force of the urging means is transmitted via the first piston;
An actuator mechanism for driving the second piston based on a control command of the control means;
A first oil chamber formed on the biasing means side with respect to the first piston in the switching cylinder;
A second oil chamber formed between the first piston and the second piston in the switching cylinder;
A first oil passage communicating the slave cylinder and the first oil chamber;
A second oil passage communicating the master cylinder and the second oil chamber;
A third oil passage communicating the pseudo reaction force cylinder and the second oil chamber;
A first on-off valve that switches between opening and closing of the third oil passage based on a control command of the control means,
In a state where the first on-off valve is opened, a first operation mode for driving the first piston via the second piston driven by the actuator mechanism, and a state where the first on-off valve is closed, A clutch operation device configured to switch between a second operation mode in which the first piston is driven by hydraulic pressure supplied from a master cylinder to the second oil chamber. The pseudo reaction force cylinder is set so that a reaction force corresponding to an operation load of the operation element in a state where a predetermined amount of friction material of the clutch mechanism is worn is generated,
In a state where the friction material wear amount is smaller than the predetermined amount, an operation load of the operation element is generated by a reaction force by the pseudo reaction force cylinder and a reaction force by the operation of the second piston by the actuator mechanism. The clutch operating device according to claim 1, which is configured as described above. In a state where the amount of wear of the friction material is less than the predetermined amount, the second piston by the actuator mechanism is used to determine a shortage of the stroke amount of the pseudo reaction force cylinder compared to the state where the friction material is worn by the predetermined amount. The clutch operating device according to claim 2, wherein the clutch operating device is supplemented by driving. The control means includes
When switching from the first operation mode to the second operation mode, the actuator mechanism operates the second piston so as to follow the operation amount of the operator,
4. The first on-off valve is closed when the operation amount of the operation element becomes an operation amount corresponding to a predetermined initial load by an operation of a driver of the vehicle. 5. The clutch operating device described in 1. A fourth oil passage formed by connecting any one of the first oil chamber, the slave cylinder, and the first oil passage, the second oil chamber, the master cylinder, and the second oil passage; and the control. The clutch operating device according to any one of claims 1 to 4, further comprising a second on-off valve that switches between opening and closing of the fourth oil passage based on a control command of the means. The control means includes
The clutch operation according to any one of claims 1 to 5, wherein in the first operation mode, the control of the actuator mechanism is a control corresponding to the operation of the operation element by a driver of a vehicle. apparatus.

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