Method for optimizing the adaptation of the shift quality from the start of commissioning of a new automatic transmission or automated transmission of a motor vehicle

Abstract

A method for optimizing the adaptation of the shift quality from the start of commissioning of a new automatic or automated transmission of a motor vehicle, characterized in that at the beginning of the method, in a first temperature range, which forms part of the total operating temperature range of the automatic or automated transmission, adaptation is performed to a first-order adaptation map (KF0) per shift, wherein a quality indicator is assigned to the first-order adaptation map (KF0) which determines how far and with what quality the adaptation map (KF0) has already been filled, wherein outside the first temperature range the adaptation values ​​of the first-order adaptation map (KF0) are used, wherein, if the quality indicator of the first-order adaptation map (KF0) exceeds a predetermined threshold value, a predetermined number ≥ 2 new adaptation maps (KF1, KF2) of the next higher order are generated.second-order adaptation maps (KF0) are formed as copies of the first-order adaptation map (KF0), each having its own quality indicator and replacing the first-order adaptation map (KF0), wherein each of the new second-order adaptation maps (KF1, KF2) is assigned a separate temperature range, wherein the temperature ranges of the new second-order adaptation maps (KF1, KF2) do not overlap, and wherein the temperature range of one of the next-order adaptation maps contains the minimum temperature of the temperature range of the original first-order adaptation map (KF0), and the temperature range of another adaptation map contains the maximum temperature of the temperature range of the first-order adaptation map (KF0).wherein the step of copying an nth-order adaptation map when a predetermined value for the quality indicator assigned to an nth-order adaptation map is exceeded, and generating a predetermined number of new adaptation maps of the next higher order, each with its own quality indicator and replacing the nth-order adaptation map, is repeated until the desired accuracy or the desired temperature range in which adaptation is performed is achieved, and wherein in temperature ranges between temperature ranges of adaptation maps the adaptation values ​​are determined by interpolation, and in temperature ranges that are neither between temperature ranges nor within temperature ranges of adaptation maps the adaptation value of the nearest adaptation map is used.

Description

[0001] The invention relates to a method for optimizing the adaptation of the shifting quality from the start of commissioning of a new automatic transmission or automated transmission of a motor vehicle, according to the preamble of claim 1.

[0002] According to the current state of the art, within the framework of adaptation procedures, correction values ​​for the pressure profiles for the engagement or disengagement of the shift elements of an automatic transmission are stored in adaptation maps. These values ​​depend on various events and parameters that determine shift quality during the operation of the automatic transmission, such as the drive torque and temperature of the automatic transmission or the transmission input speed, and are categorized into torque, temperature, and / or speed classes. One adaptation map is provided for each shift element. The pressure values ​​stored in the adaptation maps serve to compensate for or counteract undesirable changes in the shifting process. Such undesirable changes can be caused by component tolerances, changes in the friction coefficient of the clutch linings, and mechanical wear within the automatic transmission.If the transmission control unit detects that a shift sequence deviates from a predefined shift sequence, the adaptation map is adjusted accordingly. This results in highly accurate adaptation maps that take into account wear-related or age-related changes in the components of an automatic transmission.

[0003] Patent DE 100 57 093 A1 of the applicant discloses a method for adapting the shifting sequences of an automatic transmission. In this method, adaptation values ​​are determined based on events during the operation of the automatic transmission that determine the shifting quality. These values ​​are stored in an adaptation memory of an electronic control unit and used to adapt the control of the shifting sequences. Before being stored in the adaptation memory, the determined adaptation values ​​are corrected based on the lifetime stress of the automatic transmission. With a new automatic transmission, larger adaptation steps are initially performed; the actual adaptation values ​​determined are adjusted over time, depending on the lifetime stress of the automatic transmission. This is intended to ensure that a steady state of adaptation is reached over time.A well-advanced state of adaptation is not disturbed by determined adaptation values ​​with an excessively large step size.

[0004] From DE 199 16 006 A1 of the applicant, a method for adjusting parameters in an adaptation map for the actuation pressure of a hydraulically actuated clutch in an automatic transmission of a motor vehicle is disclosed, in which the parameters of the adaptation map assigned to a specific class are adjusted stepwise by external events, which can each be assigned to a specific class, wherein the external events detected by a sensor trigger an adjustment step in the respective class, and wherein the triggered adjustment step causes an adjustment of the classes surrounding this class by a partial amount of the adjustment step.

[0005] Furthermore, a method for optimizing the adaptation of switching sequences of an automatic transmission is known from DE 103 16 602 A1 of the applicant, wherein the adaptation points are stored in an adaptation map, the adaptation value for the respective operating point is determined by interpolation and the surrounding adaptation points are used as support points for the interpolation.

[0006] Furthermore, a method for adapting a core field is known from DE 10 2007 002 038 A1 of the applicant, in which the core field is populated with data within a defined temperature range depending on the parameters "speed" and "torque" in a learning process. The learned data is also applied to operating ranges outside the predefined temperature range and simultaneously superimposed with a separate temperature-dependent adaptation, which itself has no effect on the data taken within the predefined temperature range.

[0007] However, due to temperature-dependent variations and tolerances of transmission components, it is not guaranteed that all transmissions in a series will exhibit good shifting quality across the entire temperature range using adaptation methods known from the prior art.

[0008] The present invention is based on the objective of providing a method for optimizing the adaptation of the shifting quality from the start of commissioning of a new automatic transmission or automated transmission of a motor vehicle, by carrying out which the shifting quality is rapidly improved over the operating time over a large temperature range.

[0009] This problem is solved by the features of claim 1. Further embodiments and advantages are set out in the dependent claims.

[0010] Accordingly, a method for optimizing the adaptation of shift quality from the start of commissioning of a new automatic or automated transmission in a motor vehicle is proposed. Within this method, at the beginning of the process, in a first temperature range that forms part of the total operating temperature range of the automatic or automated transmission, adaptation to a first-order adaptation map is performed for each shift. A quality indicator is assigned to this first-order adaptation map, determining the extent and quality with which the adaptation map has already been populated. Outside the first temperature range, the adaptation values ​​of the first-order adaptation map are used. If the quality indicator of the first-order adaptation map exceeds a predefined threshold, a predefined number ≥ 2 new adaptation maps of the next higher order are generated.Second-order adaptation maps are formed as copies of the preceding first-order adaptation map, each having its own quality indicator and replacing the preceding first-order adaptation map, wherein each of the new second-order adaptation maps is assigned a separate temperature range, wherein the temperature ranges of the new second-order adaptation maps do not overlap, and wherein the temperature range of one of the second-order adaptation maps contains the minimum temperature of the temperature range of the original first-order adaptation map, and the temperature range of another second-order adaptation map contains the maximum temperature of the temperature range of the preceding first-order adaptation map.

[0011] Preferably, the minimum temperature of the temperature range of an adaptation map of the next higher, second order is lower than the minimum temperature of the temperature range of the original adaptation map of the preceding, first order, while the maximum temperature of the temperature range of a further adaptation map of the next higher, second order exceeds the maximum temperature of the temperature range of the adaptation map of the preceding, first order. In this way, the adaptation temperature range is split and expanded as required.

[0012] In this process, interpolation is performed in temperature ranges between temperature ranges of adaptation maps, thereby avoiding the generation of different adaptation values ​​from two adjacent second-order adaptation maps at the same operating point, whereby for temperature ranges that do not lie between temperature ranges and within temperature ranges of adaptation maps, the adaptation value of the nearest adaptation map is used.

[0013] According to the invention, the step of copying an nth-order adaptation map is repeated when a predetermined value for the quality indicator assigned to the nth-order adaptation map is exceeded, followed by the generation of a predetermined number of next higher-order adaptation maps, which replace the nth-order adaptation map and each have their own quality indicator, until the desired accuracy or the desired temperature range in which adaptation is performed is achieved. Interpolation occurs in temperature ranges between temperature ranges of adaptation maps, whereas for temperature ranges that are neither between nor within temperature ranges of adaptation maps, the adaptation value of the nearest adaptation map is used.

[0014] The predetermined number of new adaptation maps of the next higher order, which replace the adaptation map of the nth order as copies of the adaptation map of the nth order, is greater than one and can be 2, 3, 4, 5, etc. In a preferred embodiment, two adaptation maps of the next higher order are generated, which replace the adaptation map of the nth order as copies of the adaptation map of the nth order. The size of the temperature ranges of the adaptation maps of the next higher order is preferably determined as a function of the number of adaptation maps of the next higher order; the higher the number of adaptation maps of the next higher order, the smaller the temperature ranges of the adaptation maps of the next higher order. The temperature ranges of the adaptation maps of the next higher order are each smaller than the temperature range of the original adaptation map of the next lower order.

[0015] For example, if the quality indicator of a second-order adaptation map exceeds a predefined threshold, two new third-order adaptation maps are created analogously to the described procedure as copies of the second-order adaptation map, each with its own quality indicator, whereby each of the two new third-order adaptation maps is assigned a separate temperature range.wherein the two temperature ranges do not overlap and wherein the temperature range of one of the adaptation maps contains the minimum temperature of the temperature range of the original second-order adaptation map and the temperature range of the other adaptation map contains the maximum temperature of the temperature range of the original second-order adaptation map and wherein the minimum temperature of one third-order adaptation map may be lower than the minimum temperature of the temperature range of the original second-order adaptation map and the maximum temperature of the temperature range of the other third-order adaptation map may be higher than the maximum temperature of the temperature range of the second-order adaptation map.

[0016] If the operating point remains within a specific temperature range for an extended period, which can occur, for example, due to the current climate zone and / or the cooling concept for the transmission cooling system, more adaptations take place. This causes the quality indicator of the nth-order adaptation map assigned to this temperature range to exceed the threshold more quickly, thus speeding up the copying of the adaptation map and the generation of two adaptation maps of the next higher order. This results in a rapid and straightforward increase in adaptation accuracy.

[0017] According to one embodiment of the invention, the quality indicator can correspond to the number of evaluated circuits. If the number of evaluated circuits exceeds the predetermined threshold, it is assumed that all areas have been accessed.

[0018] The possibility of expanding the temperature ranges assigned to the adaptation maps as required during the generation of higher-order adaptation maps also allows for the adaptation of temperature ranges whose adaptation would not have been possible with just one adaptation map, since the variation over such a large temperature range would be too high to achieve the desired quality for an adaptation map.

[0019] If the process were to start directly with two or more adaptation maps, there would be temperature ranges at the beginning of the commissioning of a new automatic transmission that would not be adequately adapted or would not be adapted at all.

[0020] The inventive method rapidly improves the adaptation values ​​for all areas. Temperature ranges that initially lie outside the adaptation range of the first-order adaptation map at the start of commissioning a new automatic transmission nevertheless utilize the adaptation value of the adaptation map, since the magnitude and trend of the adaptation value are generally correct. After splitting and expanding the adaptation temperature range by generating higher-order adaptation maps, even rarely accessed areas are provided with the existing adaptation values, which are then further adjusted and refined.

[0021] With each step of the splitting, i.e., the generation of higher-order adaptation maps, the temperature ranges between the temperature ranges of neighboring adaptation maps, in which the adaptation values ​​are obtained by interpolation, become smaller, since the values ​​no longer differ so significantly and the risk of jumps is significantly reduced.

[0022] The concept according to the invention creates a method that represents a three-dimensional, demand-oriented adaptation method, which quickly achieves an improvement in adaptation over the entire operating temperature range and subsequently refines the adaptation areas as needed in areas where the operating points are frequently located, thus improving accuracy.

[0023] The invention is explained in more detail below with reference to the accompanying figures, specifically in the case where two adaptation maps of the next higher order are generated, which replace the adaptation map of the nth order as copies of the adaptation map of the nth order. The figures show: Fig. 1: a schematic representation of the creation of the first, second and third order adaptation maps for a circuit in an automatic transmission; Fig. 2: a schematic representation of a first-order adaptation characteristic map KF0 and the use of the adaptation values ​​across the entire operating temperature range; Fig. 3: a schematic representation of the from the in Fig. 2. The adaptation characteristic KF0 of the first order shown, resulting in the adaptation characteristic KF1 and KF2 of the second order, and the use of the adaptation values ​​across the entire operating temperature range; and Fig. 4: a schematic representation of the in Fig. 3 second-order adaptation characteristic KF1 shown, which is derived from the in Fig. 3. The adaptation characteristic KF2 of the second order, the resulting adaptation characteristic KF5 and KF6 of the third order, and the use of the adaptation values ​​in the entire operating temperature range.

[0024] According to the invention and with reference to Fig. 1. At the beginning of the process, in a first temperature range that forms part of the total operating temperature range, the circuit is adapted to a first-order adaptation map KF0 per circuit. A quality indicator is assigned to the adaptation map, determining how far and with what quality the adaptation map has already been filled. Outside the first temperature range, the adaptation values ​​from the adaptation map are used. If the quality indicator of the first-order adaptation map exceeds a predefined threshold, two new, next-higher, second-order adaptation maps, KF1 and KF2, are generated as copies of the preceding first-order adaptation map KF0. Each of these new second-order adaptation maps has its own quality indicator and replaces the preceding first-order adaptation map KF0. A separate temperature range is assigned to each of the two new second-order adaptation maps, KF1 and KF2.wherein the two temperature ranges of the new adaptation maps KF1, KF2, next higher, second order do not overlap and wherein the temperature range of one of the adaptation maps KF1, next higher, second order contains the minimum temperature of the temperature range of the original adaptation map KF0, preceding, first order and the temperature range of the other adaptation map KF2, next higher, second order contains the maximum temperature of the temperature range of the adaptation map KF0, preceding, first order.

[0025] Preferably, the minimum temperature of the temperature range of an adaptation map of the next higher order is lower than the minimum temperature of the temperature range of the corresponding adaptation map of the preceding order, while the maximum temperature of the temperature range of the other adaptation map of the next higher order exceeds the maximum temperature of the temperature range of the corresponding adaptation map of the preceding order. In this way, the adaptation temperature range is split and expanded as required. The adaptation values ​​are determined by interpolation between the maximum temperature of one adaptation map and the minimum temperature of the other adaptation map of the next higher order, whereby in the other temperature ranges outside the temperature ranges of the adaptation maps, the adaptation value of the nearest adaptation map is used.

[0026] The process involves repeating the step of copying an nth-order adaptation map when a predefined value for the quality indicator assigned to that nth-order adaptation map is exceeded, and then generating two next-higher-order adaptation maps that replace the nth-order adaptation map and each have their own quality indicator, until the desired accuracy or the desired temperature range for adaptation is achieved. Interpolation occurs in temperature ranges between adaptation maps, while for temperature ranges that are neither between nor within adaptation maps, the adaptation value of the nearest adaptation map is used.

[0027] At the in Fig. In the example shown, the described procedure resulted in two third-order adaptation maps, KF3, KF4 and KF5, KF6, from the second-order adaptation maps KF1, KF2.

[0028] In Fig. Figure 2 shows a first-order adaptation characteristic map KF0, to which a quality indicator N_Indicator0 is assigned. This adaptation field is assigned a temperature range that forms part of the total operating temperature range, and adaptation takes place within this temperature range. Outside the range where adaptation occurs, the adaptation values ​​from the adaptation characteristic map are used.

[0029] If the quality indicator N_Indicator0 of the first-order adaptation map KF0 exceeds a predefined threshold, two new, second-order adaptation maps KF1 and KF2 are created as copies of the preceding-order adaptation map KF0. Each of these new maps has its own quality indicator N_Indicator1 and N_Indicator2, respectively, and replaces the preceding first-order adaptation map KF0. Fig. 3 are shown.

[0030] Here, a separate temperature range is assigned to the two new adaptation maps of the next higher, second order KF1, KF2, whereby the two temperature ranges of the new adaptation maps of the next higher, second order KF1, KF2 do not overlap and wherein the temperature range of one of the adaptation maps of the next higher, second order KF1 contains the minimum temperature of the temperature range of the original adaptation map of the preceding order KF0 and the temperature range of the other adaptation map of the next higher, second order KF2 contains the maximum temperature of the temperature range of the adaptation map of the preceding, first order KF0.

[0031] As from Fig. As can be seen in Figure 3, the generation of the two second-order adaptation fields KF1 and KF2 splits and widens the adaptation temperature range, since the minimum temperature of the temperature range of adaptation field KF1 is lower than the minimum temperature of the temperature range of the original adaptation field KF0 of the preceding order, while the maximum temperature of the temperature range of adaptation field KF2 is higher than the maximum temperature of the temperature range of adaptation field KF0. The adaptation value is determined by interpolation between the temperature ranges of adaptation fields KF1 and KF2, using the adaptation value of the nearest adaptation field for the other temperature ranges.Due to the different adaptation temperature ranges of the second-order adaptation maps, differences in the corresponding adaptation values ​​arise over time, resulting in an increase in accuracy, as shown by . Fig. 3 illustrated.

[0032] subject of the Fig. 4 is the situation where, starting from the in Fig.In the situation depicted in Figure 3, a second-order adaptation map KF2 has been replaced by two third-order adaptation maps KF5 and KF6 after the quality indicator N_Indicator2 of the second-order adaptation map KF2 exceeded a predefined threshold. In this case as well, differences arise in the corresponding adaptation values ​​of the adaptation maps KF5 and KF6, resulting in an increase in accuracy. Interpolation is performed in temperature ranges between temperature ranges of adaptation maps KF1, KF5, and KF6. For temperature ranges that do not lie between or within temperature ranges of adaptation maps, the adaptation value of the nearest adaptation map is used.

[0033] As part of a further development of the invention, it can be provided that if a predetermined value for the quality indicator assigned to an nth-order adaptation characteristic is exceeded, the nth-order adaptation characteristic is copied and three, four or five adaptation characteristic maps of the next higher order are generated as copies of the nth-order adaptation characteristic, which replace the nth-order adaptation characteristic and each have their own quality indicator, until the desired accuracy or the desired temperature range in which adaptation takes place is achieved (continued on page 12 of the original documents). Reference sign KF0 adaptation map, first order KF1 Second-order adaptation map KF2 second-order adaptation map KF3 Third-order adaptation map KF4 Third-order adaptation map KF5 Third-order adaptation map KF6 Third-order adaptation map

Claims

[1] Method for optimizing the adaptation of the shift quality from the start of commissioning of a new automatic transmission or automated transmission of a motor vehicle, characterized by, that at the beginning of the process, in a first temperature range, which forms part of the total operating temperature range of the automatic transmission or automated transmission, adaptation is performed to a first-order adaptation map (KF0) per shift, wherein a quality indicator is assigned to the first-order adaptation map (KF0) which determines how far and with what quality the adaptation map (KF0) has already been filled, wherein outside the first temperature range the adaptation values ​​of the first-order adaptation map (KF0) are used, wherein, if the quality indicator of the first-order adaptation map (KF0) exceeds a predetermined threshold value, a predetermined number ≥ 2 new adaptation maps (KF1, KF2) of the next higher, second order are created as copies of the first, preceding-order adaptation map (KF0), each of which has its own quality indicator and replaces the preceding first-order adaptation map (KF0),wherein each of the new adaptation maps (KF1, KF2) of the next higher, second order is assigned a separate temperature range, wherein the temperature ranges of the new adaptation maps (KF1, KF2) of the next higher, second order do not overlap, and wherein the temperature range of one of the adaptation maps of the next higher order contains the minimum temperature of the temperature range of the original adaptation map (KF0) of the preceding, first order, and the temperature range of another adaptation map contains the maximum temperature of the temperature range of the adaptation map (KF0) of the preceding, first order, wherein the step of copying an adaptation map of the nth order upon exceeding a predetermined value for the quality indicator assigned to an adaptation map of the nth order and generating a predetermined number of new adaptation maps of the next higher order,which each have their own quality indicator and replace the nth-order adaptation map, are repeated until the desired accuracy or the desired temperature range in which adaptation is performed is achieved, wherein in temperature ranges between temperature ranges of adaptation maps the adaptation values ​​are determined by interpolation, and in temperature ranges that are neither between temperature ranges nor within temperature ranges of adaptation maps the adaptation value of the nearest adaptation map is used. [2] Method for optimizing the adaptation of the shift quality from the start of commissioning of a new automatic transmission or automated transmission of a motor vehicle, according to claim 1, characterized by, that the minimum temperature of the temperature range of an adaptation map of the next higher order is less than the minimum temperature of the temperature range of the adaptation map of the preceding order, wherein the maximum temperature of the temperature range of a further adaptation map of the next higher order is greater than the maximum temperature of the temperature range of the adaptation map of the preceding order. [3] Method for optimizing the adaptation of the shift quality from the start of commissioning of a new automatic transmission or automated transmission of a motor vehicle, according to claim 1 or 2, characterized by , that the specified number of new adaptation maps of the next higher order, which replace the adaptation map of the nth order as copies of the adaptation map of the nth order, is two.

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