JP4881441B2 - Apparatus and method for controlling a bearing member - Google Patents

Description

  The present invention relates to a device and a method for controlling a bearing member for bearing a unit, in particular an internal combustion engine and / or transmission of a motor vehicle.

  In EP 1258650 A2, a hydraulic bearing member is known which comprises a working chamber and a compensation chamber and is capable of reciprocating a magnetorheological fluid between both chambers. A valve plate is provided between the working chamber and the compensation chamber and can be “closed” (current / magnetic field on) or opened (current / magnetic field off) by an electrically controllable magnet coil. Thereby, stiffness and damping can be controlled by appropriately closing and opening the valve plate in response to the support member movement.

  In order to control such bearing members, sensors are usually used that detect parameters such as location or speed, for example via a mechanical sensing arm. In US 2006-0173592 it is also known to use a sensor for measuring the hydraulic pressure in a hydraulic bearing member.

  Furthermore, US 2006-0173592 discloses a control system and a control method for controlling a hydraulic bearing member used for bearing a unit. In this known control system and control method, the motion state of the support member is detected via an acceleration sensor attached to the unit and a frame that supports the unit by the support member. However, this type of arrangement has a complex configuration since the sensor must be fixed and wired in a distributed location separately from the bearing member. In addition, there may be a delay between the generation of force in the bearing member and the detection of acceleration caused by this force, which delays the system's rapid response.

  The object of the present invention is to provide an improved method and an improved control device for controlling a bearing member for bearing a unit, in particular an internal combustion engine and / or transmission of a motor vehicle. It is desirable that the control be performed by a simple and inexpensive device.

  A control device for controlling a bearing member for supporting a unit, in particular an internal combustion engine and / or transmission of a motor vehicle according to claim 1 of the present invention, and a corresponding method according to claim 10 of the present invention, The control has the advantage that it reacts to the vibrations of the unit with a particularly slight delay. In addition, it is possible to achieve a configuration that is particularly inexpensive and robust and that can be easily maintained. Since the sensor forms a unit with the bearing member, only a small space is required and separate mounting of the sensor and the corresponding line is omitted. Furthermore, no mechanical parts are required between the unit and the vehicle frame. This avoids possible propagation of transmitted sound.

  The idea underlying the present invention is to measure the pressure of the magnetorheological fluid in the working chamber of the bearing member, which is fixed to the bearing member itself, in order to control the bearing member, from two or more measurements. The purpose is to use a pressure sensor that obtains the rate of change of pressure.

  If the rate of change exceeds a predetermined threshold, a predetermined control current is again directed through the coil of the bearing member. As a result, the flow of fluid from the working chamber of the bearing member to the compensation chamber is obstructed and the compression movement is subjected to great resistance. The rate of change is below a predetermined threshold during the decompression period and in the vicinity of the motion reversal point between the compression period and the decompression period. As a result, the control current is not turned on.

  In this way, the area enclosed by the force / movement curve of the unit's motion is maximized, so that maximum attenuation of the unit's vibration is achieved.

The dependent claims contain advantageous modifications and improvements of the respective subject matter of the invention.
According to the present invention, there is provided a control device for controlling a support member for supporting a unit, particularly an internal combustion engine and / or transmission device of an automobile, wherein the support member includes a chamber having a magnetorheological fluid, and a magnetic field in the chamber. And a pressure sensor for measuring the pressure of the fluid in the chamber, and the control device periodically detects the measured value of the pressure measured by the pressure sensor. A calculation unit for calculating the rate of change of pressure using at least two measured values of pressure, and a switching unit for switching on or off the control current through the coil based on whether the rate of change exceeds a threshold value It is characterized by having. Preferably, a parameter setting unit is provided, and the parameter setting unit periodically sets the control current and / or the threshold according to a predetermined functional dependency on the measured value of the detected pressure. Preferably, a reference pressure unit is provided, the reference pressure unit detects the pressure of the fluid in the chamber when the vehicle is stopped and stores it as a reference pressure, each of the predetermined functional dependencies dynamically It is a functional dependency on the difference between the measured value of the detected pressure and the reference pressure. Preferably, a driving condition determining device is provided, the driving condition determining device periodically determines one of a plurality of different driving conditions of the vehicle, and the parameter setting unit is configured to control the control current and / or the threshold value. Are formed to select from among a plurality of predetermined function dependencies based on the driving situation. Preferably, the plurality of different driving situations include a driving situation relating to at least one speed, and the parameter setting unit changes the control current and / or the threshold value according to the traveling speed of the vehicle in the driving situation relating to the speed. Is formed. Preferably, a reference pressure unit is formed for changing the stored reference pressure based on the operating situation. Preferably, a low-pass filter unit that applies a time lapse of the change speed to a low-pass filter is provided. Preferably, there is provided a variable low-pass filter unit that applies a low-pass filter to the time course of the change speed, and the low-pass filter unit has a variable limit frequency based on the driving situation.
Furthermore, a system according to the invention for supporting a unit, in particular an internal combustion engine and / or a transmission device of a motor vehicle, comprises: at least one support member having a chamber with a magnetorheological fluid; The pressure sensor is fixed to a support member and measures the pressure of the magnetorheological fluid in the chamber, and the control device controls the at least one support member.
Further, according to the present invention, a method for controlling a magnetorheological unit bearing member having a chamber with a magnetorheological fluid includes first and second measured values of pressure in the chamber at predetermined time intervals. And the pressure change rate is calculated from the change of the second measurement value with respect to the first measurement value during the time interval, and when the change rate exceeds a threshold value, the control current to the bearing member is turned on or off. And a step of switching between. Preferably, more than two measurements are taken and used to calculate the rate of change of pressure. Preferably, the pressure change rate is calculated over a plurality of time intervals. Preferably, the pressure is measured periodically, and additionally, according to a predetermined functional dependency of the threshold or the control current, respectively, on the periodically detected pressure measurement, the threshold and And / or periodically setting the control current. Preferably, when the unit is stationary, the pressure in the chamber of the unit support member is measured, the measured pressure is stored as a reference pressure, and the relative difference between the periodically detected pressure measurement and the reference pressure is stored. The method further comprises the step of periodically calculating the pressure, wherein the predetermined functional dependence of the threshold and / or the control current is a functional dependence on the calculated relative pressure, respectively. Preferably, a plurality of different driving situations of the vehicle are recognized on the basis of signals specific to the driving situation, the driving status of the automobile related to the adjustment of the support member is periodically determined according to a predetermined priority distribution, and the control current And / or further comprising selecting each of the threshold function dependencies from a plurality of predetermined function dependencies correspondingly based on operating conditions associated with adjustment of the bearing member. Preferably, the plurality of different driving situations include an operating situation relating to at least one speed, and further confirming whether the driving situation relating to the adjustment of the bearing member is an operating situation relating to the speed, and adjusting the bearing member. When the driving situation related to is a driving situation related to speed, there is a step of changing the control current and / or the threshold value according to the traveling speed of the vehicle. Preferably, the plurality of different driving situations include an operating situation relating to at least one unit position, and further confirming whether the driving situation relating to adjustment of the bearing member is an operating situation relating to the unit position, And changing the stored reference pressure when the operating status associated with the adjustment of the operating status is the operating status related to the unit position. Preferably, the pressure is measured periodically and the rate of change is applied to the low pass filter as a function of time. Preferably, the method further includes the step of applying a time lapse of the changing speed to the low-pass filter, and the step of applying the low-pass filter is performed at a critical frequency depending on the driving situation associated with the adjustment of the bearing member.

  In an advantageous form, the control device comprises a parameter setting unit, which dynamically sets the control current and / or the threshold, respectively, according to a predetermined function dependency on the detected measurement of the pressure. Set. Advantageously, the control device comprises a reference pressure unit, the reference pressure unit detects the pressure of the fluid in the working chamber when the unit is stationary and stores it as a reference pressure, each said predetermined functional dependency being a pressure It is a functional dependency on the difference between the periodically detected measurement and the reference pressure.

  In another advantageous form, the control device comprises a driving situation determination device, the driving situation determination device dynamically determines one of a plurality of different driving situations of the vehicle, and the parameter setting unit comprises a control current and / or Alternatively, the function dependency of the threshold value is formed to select from among a plurality of predetermined function dependencies corresponding to each driving situation.

  Embodiments of the invention are shown in the drawings and will be described in detail in the following description.

It is a schematic longitudinal cross-sectional view of the magnetorheological support member provided with a pressure sensor in one embodiment of the present invention. It is a logic block diagram of the control apparatus which concerns on one embodiment of this invention. It is a logic block diagram of the control apparatus which concerns on another embodiment of this invention. 3 is a flowchart of a method according to an embodiment of the present invention. An example of the time course of the pressure in the working chamber of the magnetorheological support member in one embodiment of the present invention is the time course of the control current switched by the control device according to one embodiment of the present invention. It is a graph shown in connection with the example of.

  In the drawings, the same reference numerals represent the same or functionally identical members.

  FIG. 1 is a schematic longitudinal sectional view of a magnetorheological support element having a pressure sensor. The pressure sensor is used to control the bearing member in one embodiment of the invention.

  The bearing member VLE has a working chamber 104 and a compensation chamber 102 in the housing. A magnetorheological fluid can reciprocate between the working chamber 104 and the compensation chamber 102. A partition wall or plate 125 is provided between the working chamber 104 and the compensation chamber 102, and has a gap-shaped opening 112 on the outer edge thereof, for example, the outer edge in three directions. The fluid is transferred between the chambers 104 and 102 through the opening 112.

  For example, the winding of the coil 106 extends along the outer edge of the partition formed as the plate 125. A control current can be introduced into the coil 106 via the electrical connection 120. When the control current flows, a magnetic field is formed in the gap-shaped opening 112 defined by the iron core 114, and the flow resistance of the magnetorheological fluid in the region of the gap-shaped opening is increased. Thereby, based on the strength of the current, the fluid flow can be disturbed or completely interrupted.

  A pressure sensor holder 116 is connected to the working chamber 104 via a passage through which fluid flows. A pressure sensor 118 is attached to the pressure sensor holder 116. The pressure sensor 118 transmits a measurement signal corresponding to the pressure in the working chamber 104 via the electrical connection 122. Advantageously, the pressure sensor, on the one hand, prevents the magnetic field of the coil 106 from affecting the connection between the pressure sensor and the working chamber, on the other hand, where the connection 120 of the coil 106 is present. It is attached so that the measurement signal can be taken out in the vicinity.

  Further, the working chamber 104 is defined by an elastic outer wall 108, for example, a rubber / metal component. A threaded rod 110 is fixed to the elastic outer wall 108. The compensation chamber 102 is defined by a diaphragm 124 which is also elastic, for example made of an elastomeric material. Advantageously, a pressure loading means is provided between the diaphragm 124 and the cover 126 of the bearing member VLE to assist the fluid return flow from the compensation chamber 102 to the working chamber 104 during the decompression period, i.e. the decompression period. It may be.

  In operation, the bearing member is mounted, for example, such that the unit to be supported is coupled to the threaded rod 110 and the housing of the bearing member VLE is coupled to the automobile frame. When the unit exerts a pressing force on the bearing member VLE via the threaded rod 110, fluid is discharged from the working chamber 104 to the compensation chamber 102. Within the compensation chamber 102, the fluid elastically stretches the diaphragm 124. When the control current is guided to the coil 106, the stiffness and damping of the support member can be controlled by appropriately changing the flow resistance in the gap-shaped opening 112.

  FIG. 2 is a logic block diagram of the control device RE according to the embodiment of the present invention. A reduced view of the support member VLE shown in FIG. 1 is schematically shown on the left side of the drawing. The pressure sensor 118 is connected to the pressure detection unit 202 of the control device RE, and transmits a pressure measurement signal indicating the pressure occupying the working chamber of the support member to the pressure detection unit 202. The coil 106 of the support member VLE is connected to a switching unit 208 that switches a control current passing through the coil.

  A calculation unit 204 and a low-pass filter 206 are arranged in the signal transmission process between the pressure detection unit 202 and the switching unit 208. Further, the pressure detection unit 202 is connected to a reference pressure unit 212 and a parameter setting unit 210. The pressure detection unit 202 provides the reference pressure unit 212, the parameter setting unit 210 and the calculation unit 204 with measurements of the pressure in the working chamber of the bearing member VLE. The parameter setting unit 210 sets parameters for the switching unit 208 to switch the control current passing through the coil.

  During operation, the pressure detection unit 202 performs a dynamic measurement of the pressure in the working chamber of the bearing member VLE. The calculation unit 204 receives this measurement value and again determines the rate of change of pressure dynamically based on the measurement value, for example, the difference between the measurement values of two consecutive periodic measurements, and the length of one cycle. Calculate by dividing by. The resulting signal representing the rate of change as a function of time is transmitted to the low pass filter 206. The low-pass filter 206 allows only frequencies below a predetermined limit frequency to pass. The resulting signal that has passed through the low pass filter is transmitted to the switching unit 208. The switching unit 208 compares the amplitude of the signal with a predetermined threshold and turns on the control current through the coil 106, which is also predetermined with respect to its strength, whenever the amplitude of the change rate signal applied to the low-pass filter exceeds the threshold. Switch off whenever the amplitude falls below the threshold.

  During operation, the reference pressure unit 212 opens the connection to the compensation chamber via the pressure sensing unit 202 when it confirms that the unit is stationary and the control current through the coil 106 is switched off. Then, a measured value of the pressure in the working chamber corresponding to the pressure in the compensation chamber is obtained, and this measured value is stored as a reference pressure.

  The reference pressure unit 212 provides the stored reference pressure to the parameter setting unit 210 when the unit is in operation, i.e. not stationary. The parameter setting unit 210 simultaneously receives a periodically detected measurement value of pressure from the pressure detection unit and again periodically subtracts the reference pressure from the periodically detected measurement value each time. Calculate the relative pressure. Based on the periodically obtained relative pressure, the parameter setting unit 210 periodically sets a predetermined threshold and / or a predetermined strength of the control current to be switched by the switching unit 208. The predetermined threshold and / or the predetermined strength of the control current to be switched by the switching unit 208 influences the current supplied to the coil 106 by the switching unit 208 as a parameter. For this purpose, for example, the parameter setting unit 210 may store a table in which values to be set for the threshold value and / or the control current are assigned to possible values of the relative pressure.

  FIG. 3 is a logic block diagram of a control device according to another embodiment of the present invention. In this embodiment, the structure of the control device RE that has already been described with reference to FIG. 2 is employed, but here it is shown as a blank rectangle for ease of viewing. Further, the embodiment shown in FIG. 2 is generalized in that a plurality of support members VLE1,..., VLEn are controlled in this embodiment, and for this purpose, the controller RE shown in FIG. There are also several corresponding elements.

  In FIG. 3, reference numerals S1, S2,..., Sn denote a plurality of sensors for displaying parameters specific to the driving state of the automobile, for example, a speed sensor, a brake sensor, an engine speed sensor, a steering angle sensor, a clutch sensor, a vertical sensor. An acceleration sensor, a lateral acceleration sensor, a wheel rotation number sensor, a gas pedal sensor, and the like are shown.

  Further, the symbols ST1, ST2,..., STn indicate controllers that are in an operation state that is specific to each operation situation, in particular, specified by the signal values of the sensors S1, S2,.

  In this embodiment, the sensors S1, S2,..., Sn and the controllers ST1, ST2,..., STn can communicate with a data bus CB, for example, a CAN bus in both directions.

  Reference numeral SES indicates a driving situation recognition apparatus including a plurality of driving situation recognition blocks E1, E2, E3, and E4. A plurality of driving situation recognition blocks E1, E2, E3, E4 can be supplied to the driving situation recognition device SES via the data bus CB, sensors S1, S2,..., Sn and controllers ST1, ST2,. Based on the input signal specific to the driving situation of STn, a plurality of different driving situations corresponding to the vehicle are recognized and corresponding driving situation output signals B1, B2, B3, B4 are transmitted.

  In the present embodiment, the driving situation recognition device SES has four driving situation recognition blocks E1, E2, E3, E4, that is, a first driving situation recognition block for recognizing at least one traction driving situation. E1, a second driving situation recognition block E2 for recognizing at least one handling driving situation, and a third driving situation recognition block for recognizing at least one driving comfort (Fahrhomfort) driving situation E3 and a fourth driving situation recognition block E4 for recognizing at least one noise introduction driving situation. These driving situation recognition blocks can detect four different driving situations and send corresponding driving situation output signals B1, B2, B3, B4.

  The prioritization device PR always receives the respective output signals B1, B2, B3, B4 of the driving situation recognition blocks E1, E2, E3, E4 and relates to the adjustment of the bearing members according to the stored predetermined priority distribution. The driving situation is determined, and a priority driving situation signal PB is output.

  Further, reference numeral PF denotes a parameter determination device for determining the set parameter sets EPS1,..., EPSn for the respective support members VLE1,..., VLEn based on the output signal PB of the prioritization device PR. . These setting parameter sets EPS1,..., EPSn are stored in the parameter determination device PF or can be calculated by the parameter determination device PF according to a predetermined algorithm.

  When the structure shown in FIG. 2 of the control device RE is employed, for example, the limit frequency of the low-pass filter can be set according to the driving situation. As a result, the vibration frequency generated in a predetermined driving situation is appropriately damped. Furthermore, the reference pressure stored in the reference pressure unit can be changed, for example, to take into account the position of the unit to be changed in a predetermined operating situation. The table stored in the parameter setting unit that sets the corresponding relationship between the given relative pressure and the threshold value and / or the control current is also based on the operating state. It is changed by calling.

  Furthermore, a mode signal MS can be supplied to the parameter determination device PF. The parameter determination device PF determines the setting parameter sets EPS1,..., EPSn in consideration of the mode signal MS. In this way, the setting parameter sets EPS1,..., EPSn are additionally changed based on the current operating state, for example, based on the speed, the preselected program, the excitation, and the like. For example, the threshold value and / or the control current value obtained from the table by the parameter setting unit or the limit frequency of the low-pass filter can be changed according to the traveling speed by an appropriate calculation.

  In the present embodiment, the control device RE has a controller device that is designed to perform closed loop control of the control current to be applied to the support members VLE1,..., VLEn. The control device RE transmits the respective control current signals SS1,..., SSn to the controller device, and the pressure measurement signals WS1,..., WSn transmitted by the respective pressure sensors 31,. In addition, the respective actual control current signals IS1,..., ISn are received from the bearing members VLE1,.

  FIG. 4 shows a flowchart of a method according to an embodiment of the invention. The course shown in the figure corresponds to the operation performed during one cycle, that is, continuously repeated. In decision step 400 it is examined whether the unit is stationary, i.e. whether the vehicle is stationary or nearly stationary. If yes, in step 402, the pressure value p0 is detected and stored as a reference pressure. At this time, the control current is set to zero in step 404 to allow free compensating flow of the magnetorheological fluid between the chambers.

  If the unit is not stationary, in step 406, from the pressure measurement value p (n) detected in the current cycle and at least the pressure measurement value p (n-1) detected in the previous cycle, one cycle is obtained. Calculate pressure change over time. This calculated value together with the corresponding value calculated in the previous period forms a time-related signal. This signal is subjected to a low pass filter in step 408. In this case, the limit frequency may be based on the currently determined operating state.

  In Step 410, the relative pressure is calculated by subtracting the reference pressure p0 from the pressure measurement value p detected in the ongoing cycle. This relative pressure is used in step 412 to find the corresponding threshold value in the table, for example. The table can be selected from a plurality of tables according to the currently determined driving situation.

  In decision step 414, it is checked whether the currently determined driving situation specifies a speed dependent parameter. If YES, in step 416, the threshold obtained from the table is compensated according to the current value of the traveling speed, for example, based on a predetermined calculation rule.

  In decision step 418, it is determined whether the pressure change calculated in step 406 and applied to the low pass filter in step 408 is greater than a threshold. If YES, in step 420, the control current to be discharged to the support member is obtained from a predetermined table, for example. At that time, the table can be selected from a plurality of tables according to the currently determined driving situation. Furthermore, the control current can be changed, for example, in a predetermined driving situation having a traveling speed or similar additional parameters.

  If the pressure change does not exceed the threshold, the control current is set to a predetermined minimum value. This means allows free return flow of fluid from the compensation chamber 102 to the working chamber 104 as the unit pressure relative to the bearing unit drops during the rebound period. The return flow may advantageously be assisted by the pressure load of the compensation chamber 102.

  FIG. 5 shows a control current that can be switched by the control device according to an embodiment of the present invention, in an example of the time course 504 of the pressure in the working chamber of the magnetorheological support member in the embodiment of the present invention. It is a graph shown in association with an example 506 of the time course of. The graph has a time axis 500. The other axis serves to show pressure 504 and control current 506 in arbitrary units. It is clear that the control current 506 is always switched on when the rate of pressure change, ie, the slope of the curve 504 shown in FIG. 5, exceeds a predetermined threshold. Since the threshold is positive in the figure, the control current remains switched off not only during the rebound period but also when the vibration is in the vicinity of the reversal point of motion.

  The following symbols are used in the drawings showing the embodiments of the present invention.

11, ..., 1n Damping 21, ..., 2n Rigidity 31, ..., 3n Pressure sensor 102 Compensation chamber 104 Work chamber 106 Magnet coil 108 Elastic outer wall 110 Threaded rod 112 Gap 114 Iron core 116 Pressure Sensor holder 118 Pressure sensor 120 Magnet coil connection 122 Pressure sensor connection 124 Diaphragm 125 Plate 126 Cover 202 Pressure detection unit 204 Calculation unit 206 Low-pass filter 208 Switching unit 210 Parameter setting unit 212 Reference pressure unit 400 Stationary Status?
402 Reference pressure detection 404 Control current off 406 Pressure change calculation 408 Pressure change low pass filtering 410 Relative pressure calculation 412 Find threshold 414 Speed dependent situation?
416 Compensated threshold calculation 418 Pressure change> threshold?
420 Obtaining control current 422 Control current off 500 Time axis 502 Pressure axis or control current axis 504 Progress of pressure in the working chamber 506 Control current progress B1,..., B4 Operation status signal CB Data bus E1,. , E4 Operation status recognition block EPS1,..., EPSn Setting parameter set FS1,. .., Sn operation state sensor SES operation state recognition device SS1,..., SSn target current value ST1,..., STn controller VLE1,..., VLEn Adjustable hydraulic support member WS1, ..WSn pressure signal

Claims (15)

The control device (RE) for controlling the bearing element (VLE) for supporting the internal combustion engine and / or transmission of automobile, bearing member (VLE) is a chamber having a magneto-rheological fluid (104), A coil (106) for generating a magnetic field in the chamber and a pressure sensor (118) for measuring the pressure of the fluid in the chamber, the control device:
A pressure detection unit (202) for periodically detecting a measurement value of the pressure measured by the pressure sensor;
A calculation unit (204) for calculating the rate of change of pressure using at least two measurements of pressure;
And possess a switching unit (208) for switching the control current on or off through the coil (106) based on whether the rate of change exceeds a threshold value, and the parameter setting unit (210) is provided A parameter setting unit (210) periodically sets the control current and / or the threshold according to a predetermined function dependency on the measured value of the detected pressure, respectively, and a reference pressure unit (212) is provided. A reference pressure unit (212) detects the pressure of the fluid in the chamber (104) when the vehicle is stopped and stores it as a reference pressure, each of said predetermined functional dependencies being dynamically detected A control device for controlling a bearing member, characterized in that it is a functional dependency on the difference between a measured pressure value and a reference pressure . A driving condition determining device (PR) is provided, the driving condition determining device (PR) periodically determines one of a plurality of different driving conditions of the automobile, and the parameter setting unit (210) is configured to perform the control. The control device according to claim 1 , wherein the control device is configured to select a function dependency of the current and / or the threshold value from a plurality of predetermined function dependencies corresponding to each of the operating conditions. A plurality of different driving situations include driving situations relating to at least one speed, and the parameter setting unit (210) changes the control current and / or the threshold value according to the traveling speed of the vehicle in the driving situations relating to the speed. The control device according to claim 2 , wherein the control device is formed. The control device according to claim 2 or 3 , wherein the reference pressure unit (212) is configured to change the stored reference pressure based on operating conditions. It said change pass filter unit for applying a temporal course of the speed to the low-pass filter (206) is provided, the control device according to claim 1. Wherein and the temporal course of the change speed variable low-pass filter unit (206) is provided to apply a low-pass filter, the low pass filter unit has a variable limit frequency based on the operating conditions, from the claims 2 to 4 The control device according to any one of the above. A system for supporting the internal combustion engine and / or transmission of the automobile, the system is,
At least one bearing member (VLE1) having a chamber (104) having a magnetorheological fluid, a coil (106) for generating a magnetic field in the chamber, and a pressure sensor (118) for measuring the pressure of the magnetorheological fluid in the chamber ,..., VLEn), and
Controlling the previous SL least one bearing member, and having a control device according to any one of claims 1 to 6 (RE), for supporting the internal combustion engine and / or transmission of a motor vehicle System for. Magnetorheological unit bearing member having a chamber (104) having a magnetorheological fluid, a coil (106) for generating a magnetic field in the chamber, and a pressure sensor (118) for measuring the pressure of the magnetorheological fluid in the chamber In a method for controlling (VLE),
Periodically measuring first and second measurements of pressure in the chamber at predetermined time intervals;
Calculate the pressure change rate from the change in the second measurement value relative to the first measurement value during the time interval (406), and if the change rate exceeds a threshold, turn on the control current to the coil (106) or Switching off (420)
And have a step that,
Measuring the pressure in the chamber of the unit support member when the unit is stationary (402);
Memorize the measured pressure as the reference pressure,
Calculating a relative pressure periodically as a difference between a periodically detected pressure measurement and a reference pressure (410);
Periodically setting the threshold and / or the control current according to a predetermined functional dependency of the threshold or the control current, respectively, on a periodically detected pressure measurement (412, 404) Further comprising steps,
Magnetorheological unit bearing having a chamber with a magnetorheological fluid , wherein the predetermined functional dependence of the threshold and / or the control current is a functional dependence on the calculated relative pressure, respectively. A method of controlling a member. The method of claim 8 , wherein more than two measurements are taken and used to calculate (406) the rate of change of pressure. The method according to claim 8 or 9 , wherein the pressure change rate calculation (406) is performed over a plurality of time intervals. Recognize several different driving situations of a car based on driving situation specific signals,
According to a predetermined priority distribution, the driving situation of the vehicle related to the adjustment of the bearing member is periodically determined,
Each of the functional dependencies of the control current and / or the threshold is selected from a corresponding plurality of predetermined functional dependencies based on operating conditions associated with adjustment of the bearing member,
The method of claim 8 , further comprising a step. A plurality of different driving situations including driving situations relating to at least one speed;
Check whether the driving situation related to the adjustment of the bearing member is the driving situation related to the speed (414),
When the driving situation related to the adjustment of the support member is a driving situation related to the speed, the control current and / or the threshold value is changed according to the traveling speed of the vehicle (416).
The method of claim 11 , comprising steps. A plurality of different driving situations including driving situations relating to at least one unit position;
Check whether the operation status related to the adjustment of the bearing member is the operation status related to the unit position,
Changing the stored reference pressure when the operating status related to the adjustment of the bearing member is the operating status related to the unit position;
13. A method according to claim 11 or 12 , comprising steps. 11. A method according to any one of claims 8 to 10 , wherein the pressure is measured periodically and the rate of change is applied to the low pass filter as a function of time (408). Additionally, has a step of applying a temporal course of the change speed to the low-pass filter, a step of subjecting a low-pass filter is performed at a limit frequency which depends on the operating conditions which are associated with the modulation of the bearing member, according to claim 11 14. The method according to any one of items 13 to 13 .

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