FR2792263A1 - Apparatus for actuating automatic clutch and gearbox of car comprises two control units, where second control unit is linked to additional mechanism, such as air-conditioning system or oil pump - Google Patents

Abstract

Charge applied to motor (2) is controlled by accelerator pedal (14) whose position is detected by sensor (16). Outlet of this sensor and other sensors related to water temperature, etc., are linked to first control unit (18). Second control unit (44) is used to control clutch (4) and gearbox (6). Second control unit controls actuators (46, 48, 50) working with gearbox and clutch. Second control unit is linked to additional mechanism (80), such as air-conditioning system (81) or oil pump, and controls start or stop of those additional mechanisms.

Description

The invention relates to a motor vehicle comprising a device

  allowing the automatic actuation of a clutch and / or a gearbox. Recently, automated clutches and / or automated gearboxes have been used more and more. A significant increase in comfort is associated therewith and these clutches or these gearboxes also lead to savings in consumption, since due to the lower expense linked to a gear change, the driving takes place more frequently at a favorable speed from the consumption point of view. Automated gearboxes provide comfort corresponding to that of a conventional gearbox vehicle

  automatic, without having the drawbacks from the point of view of consumption

  mation, which vehicles, equipped with conventional automatic gearboxes with a torque converter, frequently present by

  compared to comparable manually operated vehicles.

  Ordering automated clutches and gearboxes

  automated gears like for example automatic gearboxes

  manual switching, must be such that the driver sees as little as possible engagement or switching operations, and in particular does not notice any jerks. Furthermore, it is appropriate that the gear change processes can be carried out quickly since this makes it possible to reduce the duration of interruption of the traction force and this is assessed by the driver as being comfortable and important from the point of view security. Particularly in the case of shifting at high speeds, during an acceleration process, it is particularly desirable that the speed change process

be as brief as possible.

  The object of the invention is to improve the operational safety of

  the automated clutch and / or an automated gearbox, in particular

  ment of a manual gearbox in the chain

  driving a motor vehicle so that change processes

  speed as short as possible and only by

  security is therefore increased.

  This problem is solved using a device of the type indicated more

  high, characterized in that the control unit automatically connects

  subdued, at least one additional mechanism, when triggered

  shifting process to a higher speed.

  One solution to this problem consists of a device for the automated actuation of an automated clutch and / or an automated gearbox in the drive chain of a motor vehicle, comprising a control device and connected sensors, and in

  which during a gear change process, the clutch is released

  automatically engaged and after a change process

  speed, the clutch is automatically engaged again, characterized in that the control unit connects

  automated, at least one additional mechanism, when triggering

  the process of switching to a higher speed. This process of

  connection can be carried out in such a way that the additional mechanism

  additionally connected to the drive motor. Similarly, in the case of a not yet open starting clutch arranged between the engine and the gearbox, the mechanism can be connected in addition to the gearbox or to the drive chain. It is appropriate that the additional mechanism is disconnected again after the

gear change process.

  According to another idea of the invention, the problem is solved using a device for the automated actuation of an automated clutch and / or an automated gearbox in the drive chain of a vehicle. automobile, comprising a connected control unit and sensors, and in which during a gear change process, the clutch is disengaged in an automated manner and, after a gear change process, the clutch is new automatic engagement, characterized in that the control unit automatically disconnects at least one additional mechanism when initiating a demotion process. This disconnection process can be performed so that the additional mechanism is disconnected from the drive motor. Similarly, while the starter clutch between the engine and the gearbox is not yet open, the mechanism can be disconnected from the

  gearbox or drive chain.

  It is advantageous that the additional mechanism is again

  connected after the gear change process.

  It is advantageous that the additional mechanism is in particular one of the following mechanisms: air conditioning installation, programmer,

  oil pump, other electrical appliances.

  Other characteristics and advantages of the present invention are related to

  derived from the description given below taken with reference to the drawings

  attached, in which: - Figure 1 shows the drive chain of a motor vehicle with a diagram of the electronic control of the motor vehicle; and

  - Figure 2 shows a diagram with characteristic curves.

  The engine 2 arranged in the form of an internal combustion engine is connected via a clutch 4 to a gearbox 6, which drives the rear wheels 12 of the motor vehicle via a

  transmission shaft 8 and a differential 10.

  The load applied to the engine 2 is controlled by means of an accelerator pedal 14, the position of which is detected by a sensor 16, the output of which is connected to the input of a control device 18. The control device control 18 is connected to other sensors, such as a sensor 20 for detecting the position of a load control member 22 of the engine, a sensor 24 for the temperature of the cooling water, a sensor 26 for the pressure in the suction line,

  a sensor 28 of the speed of rotation of a flywheel or of the vile-

  engine brequin 2, etc. From the input signals, a control signal, which controls an actuator 30 which determines the position of the load controller 22, is obtained in the

command 18.

  The vehicle braking system comprises a brake pedal 32, the position of which is detected by a sensor 34. The brake pedal 32 directly controls a braking unit 36 which is connected to the brake cylinders 38 of all four wheels. The speed of rotation of the wheels is detected by sensors 40, the output signal of which is sent, as well as the output signal of a sensor 34 used to detect the position of the brake pedal 32, to a control device. 42, the signal

  preventing for example a wheel lock.

  Another control device 44 is provided for controlling the clutch 4 and the gearbox 6, which controls actuators 46, 48 and 50 used to actuate the clutch 4 for a gear change process and for a selection process inside the gearbox 6. As input signals, the positions of different actuators or of components actuated by the actuators are sent directly to the control unit, using corresponding sensors (not shown). In addition, the control device 44 is connected to a

  sensor 52, which detects the speed of rotation of the drive shaft 8.

  The three control devices 18, 42 and 44 have known arrangements and contain a microprocessor with which are associated a read only memory (ROM) and a write-read memory (ROM). The control units 18, 42 and 44 are connected via a data transmission BUS line (for example what is called a CAN bus) 54 for the reciprocal exchange of data. In place of or in addition to the data bus line 54, the control units can be connected via lines

  individual data transmission (for example line 56 represented

  sensed by a dashed line) between the control unit 18 and the control unit 44, with which individual input signals or individual output signals from the control units can be sent to inputs or to outputs of two control devices, for example the speed signal issued by the

  sensor 28 and which is also used by the control device 44.

  In addition to the control devices described, other control devices can be provided, for example a control device, with the aid of which the driving stability of the vehicle is adjusted additionally for the ABS function. The clutch 4 and the gearbox 6 are not necessarily controlled by the control device 44. The gearbox 6 can also be arranged in the form of a conventional manual gearbox comprising a gear shift lever

  to make a gear change.

  For perfect control of the clutch 4 and of the gearbox 6, the control unit must receive as input signals the input speed of the gearbox (detected by the sensor 28), the gearbox output rotation speed (detected by sensor 52), engaged speed (detected by sensors not shown in the gearbox, clutch position (detected by speed sensor not shown, for example inside the actuator 46), the engine torque (detected by the not shown torque sensor installed for example on the transmission shaft 8, the position of the accelerator pedal 14, an actuation known as "kick-down" (full throttle) of the accelerator pedal 14 (detected by a switch not shown) as well as the no-load operation of engine 2 (detected by

  the intermediary of the actuator 30).

  To identify processes of shifting to a higher speed, i.e. for example from speed 1 to speed 2 or downshifting processes (for example from speed 3 to speed 2), a sensor is provided. speed identification. In an automated gearbox, the switching process can be triggered in an automated way so that the control unit controls the switching process, and the speed from which and the speed towards which the

  switching, are also known in the control program.

  With the sensor, it is possible to identify the current set speed and the speed engaged after the speed change process, and by comparison of these speeds, the control unit can assess whether there is a process of shifting to a higher speed or a

demotion process.

  Therefore, an additional unit or mechanism, such as an air conditioning system or an oil pump or gearbox brake, can be connected or disconnected in an automated manner, so as to speed up the changeover process. speed. Under the effect of connection or disconnection, the vehicle engine is more strongly braked or more strongly accelerated, this having the effect that the set speed of the engine during a gear change is reached faster than the absence of such an automated connection or disconnection. Therefore the process

  shifting can be performed faster and the shift

  yage can be switched on again more quickly. The control unit 44 is for this purpose connected, according to a signal transmission link, to the additional mechanism 80, such as an air conditioning system, or 81, or to the additional mechanism such as an oil pump or 'Other electrical devices, and controls, via control signals, the connection or disconnection of additional mechanisms 80, 81. As a result, the braking torques are increased or reduced to influence the process

gear change.

  The invention provides for actively increasing the brake torque.

  swimming of the internal combustion engine in particular in the case of passages at high speeds in traction, so as to obtain a reduction as high as possible in the rotation speed of the engine during the duration of disengaging, that is to say during the duration of the disengaged state, or during the gear change duration (the duration of a gear change

  speed, at least the duration of the release from speed).

  This is done for example by means of an additional charge

  applied to the combustion engine with additional drive torque

  for example of the generator, such as the alternator or

  similar mechanisms, such as an air conditioning system

  air conditioning compressors or hydraulic pumps. The

  generator can also be used as a motor for braking.

  In the thrust operation, we have the following torque equation: Mpoussée = Mpoussée_moteur + Mcload Mpoussée represents the total thrust torque, Mpoussée_moteur represents the thrust torque of the internal combustion engine and Mcharge represents the load that can be connected in addition, for

increase the thrust torque.

  The increase in the thrust torque by means of the load which can be connected additionally can be achieved continuously or

  in discrete steps, see Figure 2, in which this is shown.

  Figure 2 shows a representation 100 of the engine torque as a function of the engine speed for different values of

  pedal depth, such as accelerator pedal positions.

  This results in different characteristic curves o10ta of the engine torque. The characteristic curve 102 represents the operating curve in thrust, which can be controlled by means of an increase in the thrust torque to pass to the characteristic curve 103, in which case this can be done in discrete steps in accordance with the arrows 104, 105

  or continuously in accordance with arrow 106.

  The claims made with the request are proposals

  formulation without prejudice to obtaining additional protection

  be more extensive by patent. The plaintiff reserves the right to claim still other combinations of characteristics, which have been

  previously revealed only in the description and / or in the drawings.

  References used in the subclaims indicate another

  embodiment of the subject-matter of the main claim by means of the features of the respective claim; they should not be considered as a renunciation of obtaining independent protection

  and independent for combinations of characteristics of the sub-

related claims.

  Since the objects of the subclaims may form,

  in relation to the state of the art on the priority date, autonomous and independent inventions, the applicant reserves the right to

  present as objects of independent claims or

  as explanations of division. They may also contain

  independent inventions, which represent an independent configuration

  of the objects of the preceding subclaims.

  The exemplary embodiments should not be considered as a limitation of the invention. On the contrary, we can have, as part of the

  this publication, many changes and modifications, including

  variants, elements and combinations and / or materials of this type, which for example can be drawn by the specialist

  with the solution of the invention, by combination or modification of different characteristics or of different elements or operating steps, which are described in the general description and in embodiments5 as well as in the claims and are contained in the drawings, and which lead, by means of characteristics which can be combined, to a

  new object or at new process steps or sequences of process steps, also insofar as they relate to manufacturing, checking and machining processes.

Claims (5)

R E V E N D I C A T I O N S CLAIMS $   1. Device for the automated actuation of an auto clutch   materialized (4) and / or an automatic gearbox in the drive chain of a motor vehicle, comprising a control device (18) and connected sensors, and in which during a gear change process, The clutch is automatically disengaged and, after   a gear change process, the clutch is again engaged   in an automated manner, characterized in that the control unit automatically connects at least one additional mechanism,   when initiating higher speed processes.   2. Device according to claim 1, characterized in that the   additional mechanism (80) is disconnected again after the process no gear change.   3. Device for the automated actuation of an auto clutch   materialized (4) and / or an automatic gearbox (6) in the drive chain of a motor vehicle, comprising a control device (18) and connected sensors, and in which during a process of   gear change, the clutch is automatically disengaged   control and, after a gear change process, the clutch is again engaged in an automated manner, characterized in that the control unit automatically disconnects at least one   additional mechanism when triggering feedback processes gradation.   4. Device according to claim 3, characterized in that the mechanism   additional connection (80) is connected again after the gear switch.   5. Device according to either of Claims 1 and 3, characterized   in that the additional mechanism (80) is in particular one of the following mechanisms air conditioning system, engine brake, pump   oil, other electrical appliances.