DE102006009608A1 - Method for controlling or regulating gear box clutch, involves identifying situations of torque conducting clutch, which are found inconvenient by vehicle occupants and lead to damage of vehicle components - Google Patents

Abstract

The method involves identifying situations of a torque conducting clutch, which are found inconvenient by vehicle occupants and lead to damage of vehicle components. The situations are regulated, closed from regulated condition into the opened condition and are guided from closed condition into the regulated condition or from condition into the opened condition.

Description

The The present invention relates to a method for controlling or Control of a torque-carrying Coupling of a transmission, according to the preamble of claim 1

by virtue of increasing pollution and reducing crude oil resources is one of the major development goals of the automotive industry, the fuel consumption and thus the emission of exhaust gases to reduce.

Stage automatic transmission typically include a torque-conducting converter clutch, through their switching on the system-related slip between pump and Turbine wheel of the hydrodynamic torque converter reduced or can even be eliminated.

From the DE 197 05 694 A1 The Applicant is known, for example, a method for controlling a switching operation of a converter clutch with a desired slip, in which the converter clutch represents a controlled system, which is connected downstream of a regulator. In this case, it is checked in a first step, whether a command to a transmission circuit is present, with a positive query result, a test mode is started, to check whether a predetermined start criterion for a processing module for Sollschlupferhöhung is satisfied, with a positive query result of the test mode, the processing module started and is processed. It is provided that, when the processing module for Sollschlupferhöhung is completed, is checked in another test module, whether a predetermined start criterion for a processing module for Sollschlupfreduktion is met to a predetermined target slip.

In Typically, the torque converter acts as a vibration damper to a propagation of the vibrations of the engine in the remaining drive train and to prevent the bodywork. With regulated converter clutch (i.e., at low slip) or when the converter clutch is completely closed stand the vibration-damping Characteristics of the converter depending on the vehicle not or only insufficient to disposal, what makes acoustically negatively noticeable.

Of the The present invention is based on the object, a method for controlling or regulating a torque-conducting clutch of a transmission by carrying it out in as possible many operating areas of a vehicle with the least slip can be driven on the clutch, the ride comfort and the driveability is not affected become.

These The object is solved by the features of claim 1. Further Embodiments of the invention and advantages are apparent from the dependent claims.

Therefore It is proposed that the torque-conducting coupling on the basis of Recognition of situations, on the one hand by vehicle occupants uncomfortable and / or other vibrations / vibrations, the damage lead from vehicle components can, to regulate, to close, from the controlled / controlled state to the open state, from the closed state in the controlled / controlled state or closed state to lead in the open state.

The torque leading Coupling may be a converter clutch or a clutch of a double clutch or multiple clutch transmission or a CVT transmission.

A Such a situation occurs, for example, when due to the small slips a hum is generated. In the following, vibrations, on the one hand by vehicle occupants are perceived as unpleasant and / or, on the other hand, vibrations / vibrations leading to damage to Car components lead can, called drone.

in the In an advantageous development, it is proposed that the detection of the above mentioned Situations (Brummerkennung) based on the evaluation of sensor signals at least one sensor takes place. This may be vibration or Knock sensors and / or speed sensors act, the sensors existing sensors or sensors to be installed in order to carry out the process are located in the interior of the vehicle or on an aggregate are.

According to the invention the application of the standard nominal difference maps of the GWK control loop under consideration of the signal generated by the Brummerkennung.

in the In an advantageous development, it is proposed that the standard target differential speed an adaptation is subordinated. In stationary driving conditions (global entry conditions into the adaptation) can over a Adaptation algorithm, preferably via an adaptation characteristic, a value adapted to the standard target differential speed is added. This adaptation value is over the entire operating range of the vehicle, for example as a function of engine torque, engine speed, Turbine speed, gear and / or temperature stored.

In Direction higher Grumpiness is in accordance with the invention a positive adaptation value is read out and added to the standard nominal differential rotational speed, i.e. the target differential speed is increased. In the opposite case can Solldif the reference speed can be reduced if a very low / not noticeable Grumpiness is present. It can also be provided that a Reduction of the target differential speed by appropriate application the adaptation characteristic is avoided.

in the Frame of a further variant of the method according to the invention for the control or regulation of a torque-carrying Clutch is suggested that in the setpoint generation a Control is implemented, which the target differential speed of the torque leading Clutch regulates to a predetermined value of hum ("nominal hum") the "set hum" is set, that for the vehicle occupants no disturbing Sounds occur. The "set hum" can either be Fixed value or one of several parameters, such as Gear, vehicle speed, engine and / or turbine speed, Sportiness and / or temperature-dependent function.

These Procedure results in the advantage that the vehicle acoustics on the Lifetime over the change the target differential speed can be kept substantially constant. Furthermore, over the "set hum" the acoustic behavior set similarly by different vehicle variants and classes become.

According to the invention, the torque leading Coupling, in particular either completely closed (Überanpressung the torque-carrying Clutch) or, for example, regulated to 5 l / min, if the current grumpiness is below a certain value.

Of Further, the target differential speed only up to defined limits elevated be to avoid excessive wear of the pad to avoid. Can despite maximum allowed differential speed the Humidity can not be reduced, so the torque-conducting coupling open.

Around the regulated state of the torque-conducting coupling in particular as far as possible to be able to reach can according to the invention a temperature model used, which determines the pad temperature, so that the torque leading Clutch up to the maximum permissible Pad temperature can be operated in a controlled state.

In Advantageous way is for the signal generated by the drone recognition provided a hysteresis, to make a toggle between individual operating conditions (WK OPEN, WK RULES and WK ZU).

moreover is the inventive method with combined with other functions; for example, the Method superimposed on other functions which increase drivability and safety, e.g. Dynamic function, Slip increase during circuits, Temperature protection functions, etc.

According to the invention, the Switching point strategy for the gear shifts in dependence the Brummerkennung are designed. This can be too high humming the vehicle a downshift be initiated and vice versa. As part of a combination of inventive method with the switching point strategy can be provided, for example, that at a downshift the torque-leading Clutch is closed.

The The invention will be explained in more detail below by way of example with reference to the attached figures. Show it:

1 a diagram illustrating the adaptation value of the target differential speed as a function of humidity;

2 a diagram illustrating the adaptation value of the target differential speed as a function of the drone, according to a variant of the method according to the invention; and

3 a schematic representation of an advantageous embodiment of the method according to the invention.

According to the invention, the torque-conducting clutch, in particular on the basis of the detection of situations (Brummerkennung), which are perceived by one of vehicle occupants as unpleasant and / or other vibrations / vibrations that can lead to damage to vehicle components, regulated, closed, regulated / Controlled state in the open state, from the closed state to the controlled / controlled state or from the closed state to the open state, wherein the Brummerkennung preferably based on the evaluation of sensor signals, and wherein the standard target differential speed generation an adaptation is subordinated. In this case, an adaptation algorithm can be used to adapt a value which is added to the standard nominal differential speed (signed), as in 1 shown.

Referring to 1 will go in the direction higher humming a positive adaptation value read and added to the standard target differential speed, so that the target differential speed is increased. In the opposite case, the target differential speed can be reduced, if a very low / not noticeable or not annoying grumbleness is present.

It can also be provided that a reduction of the desired differential rotational speed is avoided by a corresponding application of the adaptation characteristic curve; the corresponding course of the adaptation value as a function of the grumbleness is the subject of 2 ,

In 3 illustrates the variant of the method presented here, in which in the setpoint generation a control is implemented, which regulates the target differential speed of the torque-conducting clutch to a predetermined value of the hum ("desired humidity") 3 is the controlled system for the setpoint generation shown, where in the right part of 3 the actual slip control is shown.

By the concept of the invention is a procedure available which makes an optimal compromise between fuel consumption and driving comfort guaranteed.

Claims (13)

Method for controlling or regulating a torque-conducting clutch of a transmission, characterized in that the torque-conducting clutch based on the detection of situations (Brummerkennung), which are perceived by vehicle occupants to be uncomfortable and / or other vibrations / vibrations, to damage Can lead vehicle components, regulated, closed, from the controlled / controlled state in the open state, from the closed state to the controlled / controlled state or from the closed state to the open state. Method for controlling or regulating a torque-carrying Coupling according to claim 1, characterized in that the Brummerkennung based the evaluation of sensor signals takes place, wherein at least as a sensor a vibration or knock sensor and / or a speed sensor is used. Method for controlling or regulating a torque-carrying Coupling according to claim 1 or 2, characterized in that the Application of the standard nominal differential characteristics of the control loop the torque-carrying Clutch under consideration the signal generated by the Brummerkennung done. Method for controlling or regulating a torque-carrying Coupling according to one of the preceding claims, characterized in that the standard nominal differential speed is subordinated to an adaptation, being over an adaptation characteristic is adapted to the standard setpoint differential speed is added, and wherein the adaptation value over the entire operating range of the vehicle depending from Mo tormoment, engine speed, turbine speed, gear and / or Temperature is stored. Method for controlling or regulating a torque-carrying Coupling according to one of the preceding claims, characterized in that in the direction of higher Humidity a positive adaptation value and read to the standard target differential speed is added, in the opposite case, the target differential speed is reduced if there is very little / no noticeable grumbleness is. Method for controlling or regulating a torque-carrying Coupling according to claim 5, characterized in that a reduction the desired differential speed by appropriate application of the adaptation curve is avoided. Method for controlling or regulating a torque-carrying Coupling according to one of the preceding claims, characterized in that in the setpoint generation a control is implemented, which the target differential speed of the torque-conducting clutch to a predetermined value of the drone ("set-humidity") regulates. Method for controlling or regulating a torque-carrying Coupling according to claim 7, characterized in that the "target humidity" is set so that for the vehicle occupants no disturbing Sounds occur. Method for controlling or regulating a torque-carrying Coupling according to claim 7 or 8, characterized in that the "desired humidity" either a fixed value or one of several parameters, such as gait, Vehicle speed, engine and / or turbine speed, Sportiness and / or temperature, dependent function is. Method for controlling or controlling a torque-conducting clutch according to one of the preceding claims, characterized in that the desired differential speed is only increased up to defined limits in order to ensure an excessive Ver To avoid wear of the lining, wherein, in spite of maximum permitted differential speed, the humming is not reduced, the torque-conducting coupling is opened. Method for controlling or regulating a torque-carrying Coupling according to one of the preceding claims, characterized in that a temperature model is used which determines the coating temperature, so the torque-leading Clutch up to the maximum permissible Pad temperature is operated in the controlled state. Method for controlling or regulating a torque-carrying Coupling according to one of the preceding claims, characterized in that for the provided by the Brummerkennung signal provided a hysteresis is to a toggle between individual operating conditions (WK OPEN, WK RULES and WK ZU). Method for controlling or regulating a torque-carrying Coupling according to one of the preceding claims, characterized in that g the switching point strategy for the gear shifts in dependence the Brummerkennung is designed, with too high humming the vehicle a downshift is initiated and vice versa.