Transmission

FIELD: transport.

SUBSTANCE: invention relates to transmissions. The transmission with friction engagement incorporates an input part, an output part dropping out of engagement with the input part and one throw-out device. One unloaded output part is out of engagement with the input part and, by means of the said throw-out device, is moved into a friction engagement with the input device. The aforesaid throw-out device is made up of a drive cylinder and a driven cylinder communicating via a hydraulic line. The said hydraulic line accommodates a pressure release device designed to dissipate pressure between the aforesaid cylinders.

EFFECT: higher reliability and simpler design.

21 cl, 4 dwg

 

The invention relates to the transmission located in a rigid kinematic connection between the internal combustion engine and transmission friction grip connected to the internal combustion engine, the input part and at least one output part connected to the input shaft of the gearbox, and with the device off.

In itself known by way of a friction clutch driven by hydraulic systems shutdown, consisting of driven manually or automatically master cylinder and off the clutch receiver cylinder, both cylinders are connected to each other by a hydraulic line. In the so-called forcibly turn off the clutch in the connection state without the application of force grip off, and friction gearing for connecting the internal combustion engine and transmission is carried out by actuating and holding under pressure receiving cylinder by means of the setting cylinder. In particular, when you double-clutches, of which one common input part is divided into two output parts with the corresponding input shaft of the gearbox, this type of mounting of the clutch is preferred. If both or one of both devices off, fail, n is the sample, due to the loss of hydraulic fluid, the clutch permanently disabled and do not block transmission, as it usually happens in the clutches included in the absence of power.

Friction clutch of the above mentioned type, generally used along with driven manual transmissions automatic transmissions, for example in automated switchable gearboxes and gearboxes with double clutch, which are usually managed by means of the control device, at the same time as the clutch, and enabling and disabling transmission is carried out automatically. If the failure of such control devices, depending on the applied control strategy, it may happen that the position of connection of the clutch or both of the clutches in the gearbox with double clutch is frozen, and thus the operation of the internal combustion engine can no longer be managed independently from the rotation frequency at the output of the gearbox, that is, for example, when the vehicle is stationary impossible the operation of the internal combustion engine to maintain in working condition auxiliary units.

Therefore the task of the invention is to provide a transmission which, if failure of the control gear provides rassoedinenie is no longer shutting off the clutch. The solution to this problem should be simple, economical and does not require much the cost of installation. Must be used a small number of new parts. In addition, should be excluded with the failure of control gearbox run driver actions that are not typical for normal driving mode.

This problem is solved by using the transmission with a friction clutch in the power flow between the internal combustion engine and a transmission with an input part, at least one switchable from the input part to the output part and at least one device off, and at least one output portion in the unloaded state disconnected from the input part and with at least one device off is in frictional engagement with the input part, and at least one device formed off of the master cylinder and the receiving cylinder is connected by hydraulic line from the master cylinder and hydraulic line between the master cylinder and the receiving cylinder is a pressure-relief device for a discharge current between the master cylinder and the receiving cylinder pressure, if it is externally driven.

Especially preferred is the implementation of the idea of the invention in a dual clutch at the same time corresponding still connected for rotation with the input part of the ring part is driven by a corresponding one device off, the output part forms the input part of the frictional engagement and at least one of the devices off is specified pressure-relief device. Obviously, it is preferable to equip both devices off the pressure-relief device.

This actuation from the outside provides that in case of failure of the control transmission and automatic clutch, the driver must affect the off condition, both clutches, he actuates the actuator to actuate the device pressure relief. It is particularly preferred may be that in the case of a dual clutch provides for the possibility of actuation of both pressure-relief devices using a single actuator. In addition, it may be preferable, if the driver carries out the control of this actuator in connection with the usual action. For example, the actuation device pressure relief can be combined with the actuation of the lever to select the work programmes of the vehicle, as for example the gear selection of a transmission or switching mechanism, locking the transmission of the vehicle in the Parking lot, while depending on the position of the lever is bringing the action device pressure relief. For example, in the position of choosing "neutral" or "locking the transmission in the Parking lot" can operate the pressure-relief device, while at the position forward or backward, subject to manual control, the transmission switch up and down by movement of the lever, it is not put into action.

Signal transmission from the actuator to the pressure-relief device can be carried out mechanically, for example, by means of the Bowden cable or rod system, hydraulically, for example, using the device with the master and adoptive cylinders or electrically (by wire), for example, by using at least one located on the actuator switch, which is connected to the magnetic valve on the pressure-relief device. It is clear that such compounds can be combined or performed in a different way.

According to one exemplary embodiment, the pressure-relief device preferably has an input receiving channel from the master cylinder and an output channel to the receiving cylinder. Between them provided camera with negligible ideally, the dead volume, which is made with expandable with roaming in the axial direction of the piston depending on the pressure in the hydraulic line. Obviously, then, the Yan made with the seal relative to the camera, for example, you can apply a sealing ring, such as o-rings or seals U-shaped section, which are known from asking or receiving cylinder. Axial movement of the piston prevents the locking device until the pressure-relief device is not powered. When the locking device is connected with an actuating mechanism, such as a Bowden cable may be a pin that moves in the radial direction to the axis of the piston, which with the help of the Bowden cable is included in the piston. In the alternative or in addition, the piston can be blocked by other means, for example electric, such as solenoids or piezoelectric elements.

Two devices pressure relief can be preferably located in the same building and/or integrated in the housing master cylinder or the receiving cylinder. Especially, it is preferable to integrate the device (s), pressure relief unit consisting of electric Akrotiri, such as a motor or a piezoelectric element, a transmission to convert rotational motion of the motor into reciprocating movement of the master cylinder and master cylinder, it may be preferred overall integration of two such units to bring into reality the two clutches, for example, by saving the workspace and body parts.

In another preferred embodiment, the actuator may actuate the pressure-relief device due to the impact on him so that when switched without affecting current connection it is actuated, i.e. the pressure-relief device aligns the pressure in the hydraulic line. It has, among other things, the advantage that during the simultaneous failure of the control device and the actuator, for example, due to the complete failure of the power supply device pressure relief still performs its function on and off the clutch (clutch). You can use an electromagnet or a piezoelectric element, which directly forms a pressure-relief device, for example, due to the fact that in the hydraulic line depressurized by moving the valve or piston.

In addition, it may be preferable, in particular, when the application is driven electrically devices pressure relief, when you fast switch lever between work programs "forward" and "back" to prevent the inclusion of devices pressure relief when, for example, when these processes of selection navigates through the working program is neutral in agenie". In this case, or you can always delay the inclusion of the work programme "neutral position". It was found that the preferred delay time is the time between 0.1 and 1 second.

It is clear that the proposed alignment device volumes may also be preferred for clutches, which can be engaged with the transmission auxiliary units, such as, for example, the compressor for the climate control or the motor to start the internal combustion engine, auxiliary or only drive a vehicle and/or to generate electricity. In the case of transmission with double clutch, it may be preferable to provide an auxiliary unit, configured to disconnect one or both input shaft of the gearbox or crankshaft.

Below is a detailed description of the invention with reference to figures 1-4, on which is shown:

figure 1 - diagram of the transmission according to the invention,

figure 2-4 - examples of how to perform device reset pressure in different working conditions.

1 shows a diagram of the transmission 100 with the internal combustion engine 40 and located behind the transmission 30, which in this case is provided in the form of a gearbox with double clutch with two input shafts 9a, 9b to the timid transmission. In the power flow between the internal combustion engine 40 and the transmission 30 is a dual clutch 2 to the input part 3, which is rigidly connected for rotation with the crankshaft of the internal combustion engine and which can be normally performed in the rigid version in the form of a so-called floppy disk, as shown in figure 1, the elastic in the axial direction, or in the form of a dual flywheel, and two output parts 4A and 4b, which are connected rigidly for rotation with one of the input shafts 9a and 9b transmission in the form of a so-called clutch with friction pads, which provide a friction clutch with an input part 3. For this input part 3 is located stationary in the axial direction of the clutch disc 10C located on both sides of the surfaces of the friction clutch and rigidly connected for rotation with provided for the respective output part mounted for movement in the axial direction and rigidly connected for rotation with the input part 3 parts 10A, 10b of the annular disk, each of which has a surface friction clutch. Due to the axial displacement of the parts of the annular disk 10A, 10b is frictional engagement with the friction surfaces 4A, 4b. The number of the core surface in an unstressed state are held at a distance from the pressure disk 10C, for example, by means of a flat spring so that there is frictional engagement, i.e. both relevant both weekends parts 4A, 4b of the clutch 2A, 2b are forcibly turned off clutches.

Clutch 2A, 2b are included with axial displacement of the respective levers 4C and 4d off. The arms 4C and 4d held off the respective devices 5A, 5b of the control grip in this state until it is desirable off of the clutch. For both clutches are provided, which in itself is known, a suitable device for regulation, both clutch can influence one common device for regulation. It is clear that in the sense of the present invention may be preferred, other embodiments of the clutch, such as, for example, enforced on the grip.

Both friction clutch 2A and 2b is arranged to actuate the devices 5A, 5b off, which consist of the respective sets of cylinders 6A, 6b, which are driven in itself known manner by means of electric actuators 21A, 21b corresponding to the receiving cylinders 8A, 8b, which preferably can be located concentrically around the input shaft 9a, 9b to the timid gear ring cylinder, distributed around the input shaft of the gearbox cylinder or located through the lever mechanism is essentially parallel to the input shaft of the gearbox of the cylinder, and the corresponding supply line 7a, 7b, connecting the receiving cylinders 8A, 8b and master cylinders 6A, 6b.

In the supply line 7a, 7b, the integrated device 1 pressure relief, which is located in the housing of the devices 1a, 1b, pressure relief for the respective devices 5A, 5b off. It is clear that both devices 1A, 1b, pressure relief can also be performed separately and can be integrated into one of the constituent parts of the system off, for example in the master cylinder 6A, 6b, or the receiving cylinder 8A, 8b. The unit 1 discharge pressure is controlled from the outside, for example, by the driver. To do this, the driver has the actuator 11, which is shown in the exemplary embodiment is a lever to select the work programmes of the vehicle, for example, with the functions of the Parking lock P, reverse R, neutral position N, a forward stroke D and manual control +, - automatic transmission.

Through affecting the connection 12, which may be a Bowden cable or electrical connection means is transmitted command on the switch with the actuator 11 in the unit 1 discharge pressure p and this is shown in the example of execution affecting the connection affects two locking devices 18, which prevent the alignment of the volumes in the case of actuation provide it.

The principle of operation is shown in figure 1 the transmission 100 is as follows.

The device 50 controls transmission controls the device to actuate the transmission, which depending on the situation enables and disables transmission in the gearbox and for this coordinates actuators, such as motors 21A, 21b to actuate clutches 2A, 2b, which is a full automation of the transmission 100, or the driver may be due to the pushing movement of the lever in position "+, -" to switch from the outside using an automated clutch 2. If specifying the cylinders 6A and 6b are in their initial position, i.e. clutch 2A, 2b is turned off, the pressure in the devices 5A, 5b off is equal to the atmospheric pressure through connections not shown the compensation tank. Perhaps the existing pressure is removed. When the actuation setpoint cylinders 6A, 6b closes the connection with the compensation reservoir, highway 7a, 7b is pressurized and driven friction clutch 2A, 2b. If in such a situation fails the device 50 controls, specifying the cylinders 6A, 6b remain in its immediate floor is hereto, what clutch 2A, 2b, depending on the position of lever mechanisms 4C, 4d remain in frictional engagement. To ensure in this case, the disconnection of the internal combustion engine 40 from the transmission 30, the driver actuates the actuator 11, and thus the device 1 pressure relief, so created in lines 7a, 7b, the pressure is relieved and the clutch 2A, 2b off. Especially preferred that the different position of the actuator 11 is used as the switching levers to actuate the device pressure relief. For example, the device 1 pressure relief operates principally in the neutral position N and lock in the Parking lot R, so the driver does not issue a decision on the actuation of the actuator in certain situations, and the device alignment volumes at the same time operate in situations in which the driver and without it should trigger lever, for example when stopped or in unsafe situations on the road.

Figure 2 shows in detail an example implementation of the device 1A of the pressure relief device 5A off, according to figure 1. The housing 22 has a corresponding connection 13 from the side of the master cylinder and the connection 14 from receiving the elendra and built-in hydraulic line 7a. Between the two connections 13, 14 are made camera 15 with the set, in the ideal case, the minimum dead volume, which are limited by the piston 16. The piston 16 is placed in the other chamber 26 and seals the two chambers 15, 26 from each other using the sealing means 20, which may be annular seal, such as seal U-shaped profile or a ring. The locking device 18, which in the example shown, the execution is made in the form of acting piston pin 18, which serves as a continuation of the cable 12 Bowden, which passes through the passage 19, holds the piston 16 in a fixed state in its axial position. When this passage 19 can have a sealing effect, and additionally serve to accommodate the braid of the cable 12 Bowden. To minimize dead volume of the chamber 15, the piston 16 operates the power generated by the battery 17 energy, in this case, the spiral spring. In the housing 22 made the hole 27 to equalize pressures. It is clear that the impact on the piston forces to minimize the dead volume of the chamber 15 can be realized by using other or alternative means, such as hole 27 can be closed or apply pressure on it, the battery 17 energy can have other sizes or may be absent. According to the special example of the imp is in the hole 27 can create pressure, which comes actuating mechanism 11 (see figure 1), for example, by hydraulic switch device is a pressure.

Figure 2 shows the device 1A of the pressure relief in the blocked state. Figure 3 shows the same device 1A of the pressure relief in the powered condition with pulled back by the rope 12 Bowden and thereby open the locking device 18, which extends from the recess 28 in the piston 16, so that in the presence of highway 7a of the pressure acting on the piston 16 with the force of the pressure that is greater than the spring force accumulator 17 energy, the piston is displaced and thereby the volume of the chamber 15 increases, which leads to off clutch 2A (see figure 1).

Figure 4 shows the situation in which the supply line 7a is depressurized, for example, when specifying the cylinder 6A is in the initial position, in which the supply line 7a is connected to the compensation tank. In this case, the locking device is also opened by actuation through the cable 12 Bowden, because the driver, for example, when the operating device 50 controls chose the lock position when the Parking or neutral position, but the position of the piston 16 has not changed, because it is held in its position by the battery 17 energy. Due to this, the amount of CA is a career 15 remains constant. It should be noted that with proper execution of the battery 17 energy, in particular, relative to the weight of the piston 16 and/or hysteresis sealing means 20 of the device 1A of the pressure relief can simultaneously perform the function of the so-called smoothing filter for damping oscillations in the line 7a, which arise due to axial vibrations of the internal combustion engine and transmitted through the clutch.

1. Transmission with a friction clutch in the power flow between the internal combustion engine and a gearbox containing the input part, at least one switchable from the input part, the output part and at least one device off, and at least one output portion in the unloaded state disconnected from the input part and with at least one device off is in frictional engagement with the input part, and at least one device formed off of the master cylinder and the receiving cylinder is connected by hydraulic line from the master cylinder, characterized in that the hydraulic line between the master cylinder and the receiving cylinder is a pressure-relief device for a discharge current between the master cylinder and the receiving cylinder pressure, if it is outside p is iodide in action.

2. Transmission according to claim 1, characterized in that the friction clutch is a dual clutch containing the input part and the corresponding output portion rigidly connected for rotation with the input shaft of the gearbox, while the corresponding device off actuates the annular part mounted for movement in the axial direction, is rigidly connected for rotation with the input part.

3. Transmission according to claim 2, characterized in that both devices off, accompanied by an appropriate pressure-relief device.

4. Transmission according to any one of claims 1 to 3, characterized in that the pressure-relief device is actuated by the driver by means of an actuating mechanism.

5. Transmission according to claim 3, characterized in that the two devices pressure relief made with the possibility of putting them into effect through a single actuating mechanism.

6. Transmission according to any one of claims 1 to 3, characterized in that the two devices pressure relief for double clutch housed in the same building.

7. Transmission according to any one of claims 1 to 3, characterized in that at least one pressure-relief device integrated in the master cylinder or in the receiving cylinder.

8. Transmission according to claim 4, characterized in that the actuator assessedand with pressure-relief device lever to select a driver working program transmission.

9. Transmission of claim 8, wherein the pressure-relief device is actuated depending on the position of the selector lever.

10. Transmission according to claim 9, characterized in that the actuation device pressure relief is performed in the selected position - neutral (N) or locking the transmission in Park (P).

11. Transmission according to claim 9, characterized in that the actuation device pressure relief is not in the selected position forward (D) or reverse (R) or in the provision of manual control (+, -).

12. Transmission according to claim 1, characterized in that the pressure-relief device has an input receiving channel and output channel, and between them is a camera with a dead volume, which can be increased by roaming in the axial direction of the shear relative to the piston chamber against the action of battery power when acting on the piston due to the pressure in the main line power is acting on the piston of the axial force of the energy accumulator and the piston is released from the functional connection relatively move in the axial direction.

13. Transmission according to any one of p-12, characterized in that the functional connection is a Bowden cable connected to the actuating mechanism.

14. Transmission for any and PP-12, wherein the functional compound is a functional electrical connection, which is driven by the pin, which is connected with the driven electrically by a switch installed on the actuator.

15. Transmission through 14, characterized in that the electric functional connection is made with the possibility of impact driven electrically connected to the pin, which is connected with the provided on the actuator switch.

16. Transmission through 14, characterized in that the functional connection is made with the possibility of impact on driven electric valve, which is connected with the set on the actuator switch.

17. Transmission through 14, characterized in that the electric functional connection affects the electric valve, which directly forms a pressure-relief device.

18. Transmission through 14, characterized in that the electric functional connection is made with the possibility of actuation devices pressure relief in the de-energized state.

19. Transmission according to any one of p-12, characterized in that the actuation device pressure relief is not carried out during the quick change work programmes forward (D) and is viginia ago (R) with the passage position of the selector lever for the working program of the neutral position (N).

20. Transmission according to any one of p-12, characterized in that when the actuation device pressure relief, after selecting the working program, the neutral position (N) is delayed by a specified time delay.

21. Transmission according to claim 20, characterized in that the delay time is in the range between 0.1 and 1 C.



 

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