JPH04171321A - Wet and dry combinational clutch device - Google Patents

Abstract

PURPOSE:To make miniaturization, little elongation and reduction of dragging torque of the clutch device in the title by combining in series, a dry clutch that declutches with treadling a pedal and a wet clutch whose torque transmis sion capacity is reduced when treadling amount is increased. CONSTITUTION:A wet clutch 1 and a dry clutch 2 are connected in series to each other. The wet clutch 1 possesses a friction plate 3 that engages with a fly wheel 5 on the side of a crank shaft, and a friction plate 4 that engages with the case 7 of the dry clutch 2, and they are connected together as an outcome that a piston 14 is actuated by oil pressure. The disc 20 of the dry clutch 2 integrally rotates with a shaft 9, and thrusted to the clutch case 7 by a pressure plate 21. On account of this construction, this device is miniaturized in comparison with those that use fluid couplings, life of the disc is lengthened since the wet clutch absorbs the energy at the time of start, and dragging torque is also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combination clutch device that combines a wet clutch and a dry clutch.

[Conventional technology]

Typically, a dry friction clutch is used in the power transmission system of a passenger car. However, in vehicles such as trucks and tractors with heavy vehicle bodies, or buses that start and stop frequently, there is a drawback that the life of the facing of the clutch disc is short. Therefore, in order to suppress the wear of the clutch disk during start-up, the following measures have conventionally been taken.

One of them is, for example, a method of replacing the clutch with a wet clutch as disclosed in Japanese Utility Model Application Publication No. 59-141227.

Another method is to use a combination clutch device that combines a fluid coupling or a torque converter and a dry clutch as disclosed in Japanese Patent Application Laid-Open No. 48-77260, for example.

[Problem to be solved by the invention]

However, in the case of the above-mentioned method of replacing it with a wet clutch, it is possible to solve the problem of suppressing the wear of the clutch disc at the time of starting, but on the other hand, the drag resistance is large and it becomes difficult to shift the transmission speed.
There is a problem in that a speed increasing/decelerating device for the countershaft is required to match the rotations of the transmission when changing gears. That is, it is necessary to solve the problem of reducing drag torque during gear shifting.

In addition, in the case of the method of replacing it with the above-mentioned combination clutch device, there are no problems mentioned above, but since it uses a fluid coupling, there are problems such as the need for a large space and the need for an oil cooling device. There is.

Therefore, the purpose of this invention is to solve the above-mentioned problems, and when the load is large such as when starting, the characteristics of a wet clutch are exhibited to suppress the wear of the clutch disc.
To provide a wet/dry combination clutch device configured to exhibit the characteristics of a dry clutch and reduce drag torque during gear shifting.

[Means to solve the problem]

In order to achieve the above object, the present invention is configured as follows. That is, the first invention relates to a wet/dry combination clutch in which a dry clutch that is disengaged when the clutch pedal is depressed by a predetermined amount and a wet clutch whose torque transmission capacity decreases as the clutch pedal is depressed are connected in series. .

In this wet type combination clutch device, a wet type clutch and a dry type clutch whose torque transmission capacity is always set larger than that of the wet type clutch are arranged in series or concentrically.

Further, the present invention includes a wet clutch, a dry clutch disposed in series with the wet clutch, a shift sensor for detecting the gear position, a vehicle speed sensor for detecting the vehicle speed, and a system for changing the gear to the starting gear when the vehicle speed is below a set value. When the vehicle is engaged, the dry clutch is engaged, and the wet clutch is slid and engaged until a predetermined vehicle speed is reached, and when the vehicle speed reaches the set value and the gear is shifted to another gear, only the dry clutch is engaged. The present invention relates to a wet/dry combination clutch device having a controller for controlling the wet/dry combination clutch.

In this case, the controller compares the vehicle speed detected by the vehicle speed sensor with a set value, and issues a low speed signal when the vehicle speed is below the set value, and issues a high speed signal when the vehicle speed exceeds the set value. a comparison means, when the low speed signal is input, disengages the wet clutch and disengages the dry clutch, and further engages the dry clutch and gradually engages the wet clutch when the shift sensor detects a starting gear; low speed clutch control means that fully engages the wet clutch when the vehicle speed exceeds a set value, disengages the dry clutch when the high speed signal is input, and further includes a gear shift signal from the shift sensor. It can be comprised of high-speed clutch control means that connects the dry clutch when input.

Alternatively, the present invention includes a wet clutch, a dry clutch disposed in series with the wet clutch, a shift sensor that detects a gear position, a vehicle speed sensor that detects vehicle speed, a rotation sensor that detects engine rotation speed, and a vehicle speed setting. When the gear is put into the starting gear when the vehicle speed is below the set value, the dry clutch is engaged, and the wet clutch is slid and engaged until the vehicle speed reaches a predetermined value, and when the vehicle speed exceeds the set value, the shift amplifier is applied. , a wet type having a controller that controls only the dry type clutch and connects the dry type clutch when downshifting when the vehicle speed exceeds a set value, and also slides and connects the wet type clutch until a predetermined rotation speed is reached. This invention relates to a dry combination clutch device.

In this case, the controller compares the vehicle speed detected by the vehicle speed sensor with a set value, and issues a low speed signal when the vehicle speed is below the set value, and issues a high speed signal when the vehicle speed exceeds the set value. a comparison means, an acceleration calculation means for calculating acceleration from the vehicle speed and emitting a signal, a rotation speed comparison means for emitting a signal when the rotation speed detected by the rotation sensor exceeds a set value, when the low speed signal is input; When the wet clutch is disengaged and the dry clutch is disengaged, and when the shift sensor detects a starting gear, the dry clutch is engaged and the wet clutch is gradually engaged, and when the vehicle speed exceeds a set value, low speed clutch control jI1 means for completely engaging the wet clutch, disengaging the dry clutch when the high speed signal is input and a positive acceleration signal from the acceleration calculation means is input;
Furthermore, when a shift up signal is input from the shift sensor, a high speed clutch first control means connects the dry clutch, and when the high speed signal is input and a negative acceleration signal from the acceleration calculation means is input. , when the wet clutch is disengaged and the dry clutch is also disengaged, and when a downshift signal is manually input from the shift sensor, the dry clutch is engaged and the wet clutch is gradually engaged, and a signal is output from the rotation speed comparison means. The wet clutch may be configured to include a second high-speed clutch control means that completely engages the wet clutch when the wet clutch is inputted.

[Effect]

The wet/dry combination clutch device according to the present invention is constructed as described above and operates as follows. That is, when disengaging this wet/dry type combination clutch device, as the clutch pedal is depressed, the dry clutch is disengaged when the clutch pedal is depressed by a predetermined amount. On the other hand, with a wet clutch, as the amount of depression of the clutch pedal increases, the slippage gradually increases, and eventually the clutch becomes disengaged.

Conversely, when engaging this wet/dry combination clutch device, the dry clutch will engage when the clutch pedal is released slightly.
Furthermore, as the clutch pedal is released, the wet clutch gradually engages while slipping.

According to this operation, when the clutch is slipped at the time of starting the vehicle, the wet clutch is allowed to slip without causing the dry clutch to slip, so that wear on the clutch disc can be suppressed as much as possible. Furthermore, during gear shifting, the dry clutch is disengaged by depressing the clutch pedal by a predetermined amount, so that drag torque can be reduced.

Further, in this invention, the torque transmission capacity of the dry clutch is always set larger than the torque transmission capacity of the wet clutch, so when the load is large, the dry clutch does not slip but the wet clutch slips. Additionally, the drag torque can be reduced by disengaging the dry clutch when changing gears.

Furthermore, the effects of this invention are as follows.

If the vehicle speed detected by the vehicle speed sensor is below the set value, the dry clutch engages immediately when the shift sensor detects that the gear has entered the starting gear, but the wet clutch engages gradually while slipping. When the vehicle reaches a predetermined speed, the wet clutch fully engages and the vehicle starts moving.

Therefore, this wet-dry combination clutch device has the characteristics of a wet-type clutch at the time of starting.

Additionally, if the vehicle speed detected by the vehicle speed sensor exceeds a set value, the controller disengages the dry clutch.

At that time, when the gear is shifted to another gear, a shift signal is input from the shift sensor to the controller, which engages the dry clutch and completes the shift. Therefore, this wet/dry type combination clutch device has the characteristics of a dry type clutch during gear shifting.

Alternatively, the operation of the present invention is as follows. When the vehicle speed is below the set value, the effect is the same as that of the third invention, so this wet/dry combination clutch device has the characteristics of a wet flanch when starting. The speed change at the time is different depending on whether a downshift is performed or when a shift amplifier is performed. When performing an upshift, the dry clutch is first disengaged by the controller. Next, when a shift signal for upshifting is input to the controller from the shift sensor, the dry clutch is engaged. Therefore, this wet/dry type combination clutch device has the characteristics of a dry type clutch during upshifting.

When downshifting, the wet clutch is disengaged, and then the dry clutch is disengaged. Next, when a downshift signal is input to the controller,
The dry clutch is connected, and the wet clutch is gradually connected while slipping. The wet clutch is fully engaged when the engine rotation speed detected by the rotation sensor reaches a predetermined rotation speed. Therefore, no shock occurs during downshifting, allowing smooth gear shifting.

〔Example〕

Embodiments of the wet/dry combination clutch device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of a wet/dry combination clutch device according to the present invention. In this wet/dry combination clutch device, a wet clutch 1 and a dry clutch 2 are arranged in series in the axial direction. The wet clutch 1 has a large number of friction plates 3 and 4. One friction plate 3 has a spline groove 19 formed on the inner peripheral surface of the cylindrical portion 6 of the flywheel 5.
It is engaged with and is slidably provided in the axial direction. The flywheel 5 is connected to a crankshaft (not shown). The other friction plate 4 engages with a spline groove 18 formed on the outer peripheral surface of the cylindrical portion 8 of the clutch case 7 of the dry clutch 2, and is provided to be slidable in the axial direction. The clutch case 7 is rotatably mounted on a shaft 9 connected to a transmission (not shown) via a bearing 10. An oil seal 11 is provided between the inner peripheral surface of the cylindrical portion 6 of the flywheel 5 and the outer peripheral surface of the cylindrical portion 8 of the clutch case 7. Further, an oil seal 12 is also provided between the clutch case 7 and the clutch shaft 9.

These oil seals 11 and 12 are configured to collect oil supplied to a space 13 surrounded by the flywheel 5 and the clutch case 7. A piston 14 is provided in the space 13, and when hydraulic pressure is applied to the hydraulic chamber 15, the piston 14 is actuated to cause friction Fi3.
4 are connected.

Hydraulic pressure is supplied to the hydraulic chamber I5 through an oil passage 17 formed in the shaft 9 and the casing 16. Oil road 1
Hydraulic pressure is supplied to 7 by operating the second switching valve B, and the piston 14 is actuated by the oil pressure supply, and the wet clutch I is brought into the connected state.

Further, the clutch disc 20 of the dry clutch 2 is spline engaged with the shaft 9 via a damper, a clutch hub, etc., and is configured to rotate together with the shaft 9 and to be slidable in the axial direction.

The clutch disc 20 is pressed against the clutch case 7 by a brake plate 21. A clutch cover 22 is provided on the clutch case 7. The diaphragm spring 23 applies a pressing force to the pressure plate 21 using the clutch cover 22 as a fulcrum. A shift block 24 slidably provided on the clutch shaft 9
A shift fork 25 is engaged with the shift fork 25. The shift fork 25 is operated by operating the first switching valve 8, as shown in FIG. The dry clutch 2 is disengaged by supplying hydraulic pressure to the actuator 26, and is engaged by removing the hydraulic pressure from the actuator 26.

The torque transmission path of this wet/dry combination clutch device is
Crankshaft - flywheel 5 → friction plates 3, 4 →
Clutch case 7 - clutch disc 20 → shaft 9
→ Becomes a transmission.

Next, FIG. 3 is a sectional view showing another embodiment of the wet/dry type combination clutch device according to the present invention.

The wet/dry combination clutch device shown in Fig. 1 has a dry clutch 2 and a wet clutch 1 arranged side by side in the axial direction to shorten the space in the radial direction, whereas the wet/dry combination clutch shown in Fig. 3 The device has a structure in which the space in the axial direction can be further reduced by arranging the dry clutch 2 and the wet clutch I concentrically.

In this wet/dry combination clutch device, the dry clutch 2 has a large number of friction plates 30, 31, and is arranged on a shaft 32 connected to a transmission (not shown). A cylindrical member 33 is spline-fitted to the shaft 32, and a friction plate 31 is attached to the cylindrical member 33 so as to be slidable in the axial direction. Further, a clutch case 34 of the dry clutch 2 is rotatably mounted on the shaft 32 via a bearing 35. clutch case 34
A friction plate 30 is attached to the inner peripheral surface of the cylindrical portion so as to be slidable in the axial direction. A piston 37 is provided in a cylinder 36 formed in the clutch case 34 for pressing the friction plates 30.31 and connecting the two friction plates 30.31.

The wet clutch l is the clutch case 3 of the dry clutch 2.
4, a flywheel 41 drivingly connected to the clutch disc 40, a clutch cover 43 fixed to the flywheel 41 with bolts 42, and a cylinder 44 formed on the clutch cover 43.
It consists of a piston 45 that slides within and presses the clutch disc 40 against the annular surface 46 of the flywheel 41. The flywheel 41 is rotatably provided on the shaft 32 via a bearing 47.

Further, the clutch cover 43 is rotatably provided on the cylindrical member 33 on the shaft 32 via a bearing 48. An oil seal 49 is provided between the flywheel 41 and the shaft 32, and the piston 3 of the dry clutch 2
7 is operated by supplying hydraulic pressure to the hydraulic chamber 371. An oil passage 372 that supplies oil pressure to the oil pressure chamber 371 is formed in the clutch shaft 32 and the flywheel 41. On the other hand, the piston 45 of the wet clutch 1 is operated by supplying hydraulic pressure to the hydraulic chamber 451. Hydraulic chamber 4
An oil passage 452 that supplies hydraulic pressure to the clutch cover 4
3. It is formed on the shaft 32 and the flywheel 41. Hydraulic pressure is supplied to the oil passages 452 and 372 by the controller C operating the first switching valve A and the second switching valve 811, respectively. Furthermore, oil seals 50 and 51 are provided to prevent oil from the wet clutch 1 from leaking to the dry clutch 2 side.

The torque transmission path of this wet/dry combination clutch device is
Crankshaft - Flywheel 41 - Annular surface 46 -
Clutch disc 40 → clutch case 34 → friction plate 3
0.31→cylindrical member 33→shaft 32-transmission.

Note that either the wet clutch 1 or the dry clutch 2 may be a multi-plate type, and either clutch may be connected to the shaft 32.
Of course, it may be placed on the side.

Next 1. An example of a control device for a wet/dry combination clutch device according to the present invention shown in FIGS. 1 and 3 will be described.

First, as a first operation example, in this wet/dry combination clutch device, the wet clutch 1 is configured so that its torque transmission capacity changes according to the depression of the clutch pedal, like a normal clutch, and the dry clutch 2 is configured such that the torque transmission capacity changes according to the depression of the clutch pedal. It is configured so that it can be disconnected or connected by turning on and off a switch. Therefore, when this wet/dry combination clutch device is to be disengaged, the switch is turned off and the dry clutch 2 is disengaged when the clutch pedal is depressed by a predetermined amount.

On the other hand, the wet type clutch 1 is configured such that as the amount of depression of the clutch pedal increases, the slippage gradually increases like a normal clutch, and the wet clutch 1 eventually disengages. Conversely, when connecting this wet/dry combination clutch device, when the clutch pedal is released a little, the switch is turned on and dry clutch 2 is connected, and as the clutch pedal is further released, wet clutch l gradually engages while sliding. Finally, according to this control, when the clutch is slipped at the time of starting, etc., the wet clutch 1 is allowed to slip without causing the dry clutch 2 to slip, so that wear of the clutch disk can be suppressed to the utmost. Further, when changing gears, the dry clutch 2 is disengaged by depressing the clutch pedal by a predetermined amount, so that drag torque can be reduced.

Next, as a second operation example, the torque transmission capacity of the dry clutch 2 is always set larger than the torque transmission capacity of the wet clutch l. In this case, by appropriately selecting the set value of the torque transmission capacity, it is possible to adjust the wet clutch 1 so that the dry clutch 2 does not slip and the wet clutch 1 slips when the load is large, such as when starting the vehicle. Additionally, the drag torque can be reduced by disengaging the dry clutch when shifting gears.

As a third example of operation, when the clutch is used as an automatic clutch for vehicle speed control, the wet clutch 1 is controlled to be used only when starting.

As a fourth example of operation, when applied as an automatic clutch for vehicle speed control, control is performed using a wet clutch not only when starting but also when downshifting.

FIG. 4 is a block diagram of a control means according to the present invention, that is, a wet/dry combination clutch device for carrying out the third example of operation.

As shown in FIG. 1 or 3, this wet/dry combination clutch device includes a wet clutch 1, a dry clutch 2 arranged axially in series with the wet clutch 1, a vehicle speed sensor S for detecting vehicle speed, and a speed changer. Shift sensor D that detects gears
, a second switching valve B that switches and controls the supply and discharge of working hydraulic pressure to the wet clutch 1, a first switching valve A that switches and controls the supply and discharge of working hydraulic pressure to the dry clutch 2, and further In order to control an automatic clutch for vehicle speed control, a controller C is provided which controls a first switching valve 8 and a second switching valve B based on signals from a vehicle speed sensor S and a shift sensor D.

Further, the controller C has a vehicle speed comparison means 60, a low speed clutch control means 61, a high speed clutch control means 62, and a setting device 63. The setting device 63 sets the vehicle speed, and sets the vehicle speed to, for example, 5 km/h. The vehicle speed comparison means 60 compares the detected value detected by the vehicle speed sensor S and the set value set by the setting device 63, and issues a low speed signal when the detected value is less than the set value, and outputs a high speed signal when the detected value exceeds the set value. emit a signal.

When a low speed signal is input from the vehicle speed comparison means 60, the low speed clutch control means 6I controls the second switching valve B to disengage the wet clutch 1, and controls the first switching valve A to disengage the dry clutch 2. When the shift sensor D detects the start gear, the first switching valve A is controlled by j'BL to connect the dry clutch 2, and the second switching valve B is controlled to gradually connect the wet clutch 1.

The high-speed clutch control means 62 controls the first switching valve 8 to disengage the dry clutch 2 when a high-speed signal is input from the vehicle speed comparison means 60, and disengages the dry clutch 2 when a shift signal is manually input from the shift sensor D. Valve A is controlled to connect dry clutch 2.

FIG. 5 is a flowchart illustrating the operation of the wet/dry combination clutch device shown in FIGS. 1 and 4. FIG.

First, the vehicle speed V detected by the vehicle speed sensor S is read (step 1), and the set value set by the setting device 63 (5 km/h
) and detected car i! Compare (Step 2). If the vehicle speed V is 5 km/h or less, the second switching pulp B is controlled to remove the hydraulic pressure from the hydraulic chamber 15 of the wet clutch 1.
Wet type clutch 1 is disengaged (step 3), first switching valve A is turned off, hydraulic pressure is applied to actuator 26, and dry type clutch 2 is disengaged (step 4). After that, the transmission gear is put into the starting gear (step 5). When the shift sensor D detects that the transmission gear is put into the starting gear, the first switching valve A is controlled to apply hydraulic pressure from the actuator 26. Then, by controlling the second switching valve B, hydraulic pressure is gradually supplied to the hydraulic chamber 15, and the wet clutch 1 is gradually engaged (Step 7). ), during that time, the vehicle speed V detected by the vehicle speed sensor S is read (step 8), and it is determined whether the vehicle speed V has exceeded the set value of 5 km/h (step 9), and the vehicle speed ■ has reached the set value of 5 ■. /
Hydraulic pressure is gradually supplied to the hydraulic chamber 15 until the vehicle speed V exceeds 5 km/h (step 7), and when the vehicle speed V exceeds 5 km/h, the maximum oil pressure is applied to fully engage the wet clutch 1 (step 7). IO), as a result, the start is completed and the process returns to step 1 (step 11).

If the vehicle speed V exceeds 5 km/h in step 2,
The first switching valve A is controlled to apply hydraulic pressure to the actuator 26, and the dry clutch 2 is disengaged (step 20). After that, the gear is changed (step 21). When the shift sensor D detects that the gear has been shifted, the second switching valve B is controlled to remove the hydraulic pressure from the actuator 26 and the dry clutch 2 is engaged (step 22). As a result, the gear shift is completed and the shift is started again. Return to step 1 (step 23).

FIG. 6 is a block diagram of another control device for the wet/dry combination clutch device according to the present invention, that is, when performing the fourth example of operation. The controller C in FIG. 6 includes a high-speed clutch control means 62, an acceleration comparison means 64, a high-speed clutch first control means 65, a high-speed clutch second control means 66, and a rotation speed comparison means 67. It differs from the one shown in FIG. 4 in this respect. Furthermore, the shift sensor D is configured to not only detect the starting gear, but also detect upshifts and downshifts. The set value 63 is configured so that not only the vehicle speed V but also the engine rotation speed N can be set.

The acceleration comparison means 64 calculates acceleration from the detected value of the vehicle speed V of the vehicle speed sensor S, and issues a positive signal to the high speed clutch first control means 65 and a negative signal to the high speed clutch second control means 66. If the acceleration is positive, an upshift is required; if the acceleration is negative, a downshift is required.

The high speed clutch first control means 65 is a vehicle speed comparison means 60.
When a high speed signal is input from , and when a positive acceleration signal is input from acceleration calculation means 64, first switching valve A is controlled to disengage dry clutch 2, and furthermore, a shift up signal from shift sensor D is input. When the first switching valve A
is controlled to connect the dry clutch 2.

The high speed clutch second control means 66 is the vehicle speed comparison means 60
When a high-speed signal is manually input from the acceleration calculating means 64 and a negative acceleration signal is input from the acceleration calculation means 64, the second switching valve B is controlled to disconnect the wet type clutch, and the first switching valve A is controlled to disconnect the dry type clutch 2. off, then shift sensor D
When a downshift signal is detected by the controller, the first switching valve A is controlled to connect the dry clutch 2, and
The second switching valve B is controlled to gradually engage the wet clutch 1, and when the signal from the rotation speed comparing means 67 is received, the second switching valve B is controlled to completely engage the wet clutch 1.

The rotation speed comparison means 67 compares the detected value of the engine rotation speed N detected by the rotation sensor F and the rotation speed N0 set by the setting device 63, and when the detected value exceeds the set value N, the engine speed is increased. A signal is issued to the clutch second control means 66.

FIGS. 7(A) and 7(B) are flowcharts illustrating the operation of the wet/dry combination clutch device shown in FIGS. 1 and 6. FIG. The control ll (step 1 to step 11) when the vehicle speed ■ is 51/h or less is the same as the control (step 1 to step 11) when the vehicle speed V is 5 km/h or less in FIG. The explanation will be omitted here.

If the vehicle speed V exceeds 5-/h, it is determined whether the acceleration is positive or negative (step 30); if the acceleration is positive,
Control in steps 31 to 34 is performed. This is the control for upshifting, and is almost the same process as the control it (steps 20 to 23) when the vehicle speed exceeds 5 km/h in Fig. 5, but the only different process is: The process corresponding to step 21 shown in FIG. 5 is step 32 for performing upshift processing.

If the acceleration is negative, first, the second switching valve B is controlled to remove the hydraulic pressure from the hydraulic chamber 15 of the wet clutch l, the wet clutch 1 is disengaged (step 40), and the first switching valve A is
is controlled, hydraulic pressure is applied to the actuator 26, and the dry clutch 2 is disengaged (step 41). After that, a downshift is performed (step 42), and the shift sensor D detects that the shift has been performed. Then, the first switching valve A is controlled to remove hydraulic pressure from the actuator 26 and the dry clutch 2 is connected (step 43), and the first switching valve A is controlled to gradually supply hydraulic pressure to the hydraulic chamber 15. Then, the wet clutch 1 is gradually engaged (step 44), during which time the engine speed N is read (step 45), and it is determined whether the engine speed N exceeds the set value N (step 46). ).

When the engine speed N exceeds the set value N, the maximum oil pressure is applied to completely connect the wet clutch 1 (Step 47), and as a result, the gear shift is completed and the process returns to Step 1 (Step 48). .

Note that the flowcharts shown in FIGS. 5, 7(A), and 7(B) are explained for the wet/dry combination clutch device in FIG. 1, but the same applies to the wet/dry combination clutch device in FIG. Applicable.

〔Effect of the invention〕

The wet/dry combination clutch according to the present invention is constructed as described above and has the following effects. Although the wet/dry combination clutch device according to the present invention is disadvantageous in terms of space compared to only a dry type clutch, it is greatly advantageous in terms of space compared to one using a fluid coupling.

In addition, in this wet/dry combination clutch device, when a large load is applied to the clutch such as when starting the vehicle, the wet clutch can absorb the energy, thereby increasing the life of the clutch disc.

Further, in this wet/dry combination clutch device, the dry clutch is disengaged when shifting the transmission, so that drag torque during shifting can be reduced, making shifting easier.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of a wet/dry combination clutch device according to the present invention, FIG. 2 is a schematic perspective view showing an actuator of the dry clutch shown in FIG. 1, and FIG. 3 is a wet/dry combination according to the invention. 4 is a block diagram showing a wet-dry combination clutch device equipped with a control means according to the present invention; FIG. 5 is a cross-sectional view showing another embodiment of the clutch device; FIG. 5 is a block diagram showing the wet-dry combination clutch device shown in FIGS. 1 and 4. A flowchart explaining the operation of the clutch device, FIG. 6 is a block diagram of a wet/dry combination clutch device equipped with another control means according to the present invention, and FIGS. 7ta (A) and 7(B)
) is a flowchart illustrating the operation of the wet/dry combination clutch device shown in FIGS. 1 and 6. 1--Wet clutch, 2--11--dry launch, A---i-off valve, B--1 second switching valve, D--1-- Shift sensor, c---
・Controller, F・-1/1 rotation sensor, s-・-
Vehicle Speed Sensor. Applicant Isu＼Jidosha Co., Ltd.

Claims (5)

[Claims] (1) A wet/dry combination clutch device in which a dry type clutch that is disengaged when the clutch pedal is depressed by a predetermined amount and a wet type clutch whose torque transmission capacity decreases as the amount of depression of the clutch pedal increases are connected in series. (2) The wet/dry combination clutch device according to claim 1, wherein a wet clutch and a dry clutch whose torque transmission capacity is always set larger than that of the wet clutch are arranged in series in the axial direction. (3) The wet/dry combination clutch device according to claim 1, wherein the dry clutch and the wet clutch are arranged concentrically. (4) A wet clutch, a dry clutch arranged in series with the wet clutch, a shift sensor that detects the gear position, a vehicle speed sensor that detects the vehicle speed, and when the gear is put into the starting gear when the vehicle speed is below a set value. , while the dry clutch is engaged, the wet clutch is slid and engaged until a predetermined vehicle speed is reached, and when the vehicle speed exceeds a set value, only the dry clutch is controlled when shifting to another gear. A wet/dry combination clutch device having a controller. (5) A wet clutch, a dry clutch arranged in series with the wet clutch, a shift sensor that detects the gear position, a vehicle speed sensor that detects the vehicle speed, a rotation sensor that detects the engine speed, and a device that detects when the vehicle speed is below a set value. In this case, when the gear is put into the starting gear, the dry clutch is engaged, and the wet clutch is slid and engaged until a predetermined vehicle speed is reached, and when the vehicle speed exceeds the set value, the dry clutch is engaged when shifting up. A wet/dry combination clutch device comprising: a controller that connects the dry clutch when downshifting when the vehicle speed exceeds a set value, and also slides and connects the wet clutch until a predetermined rotation speed is reached. .