DE102017200417B4 - Method and control device for operating a motor vehicle - Google Patents

Abstract

Method for operating a motor vehicle with a drive unit (14), a transmission (2) and an output (15), wherein the transmission (2) is designed as an automatic transmission, in the power flow between the drive unit (14) and output (15) is connected and a plurality of switching elements (9, 10, 11, 12, 13, A, B, C, D, E), wherein in each inserted, traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) the transmission (2) a first number of switching elements is closed and a second number of switching elements is opened, depending on at least one operating condition of the motor vehicle in a sailing mode of the same boarded, and is subsequently dropped out of the sailing mode depending on at least one operating condition of the motor vehicle , characterized in that for entry into the sailing mode from a currently engaged, traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) out one of the currently zugkraftübert gear train (2) is opened, so then in the sailing mode, a functional entry-side, non-traction-transmitting sail gear (1_A, 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) is active, in which a switching element is less closed than in the respective traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8), and that when in the sailing mode, the drive unit (14) is stopped, while maintaining the sail mode from the respective function-entry side sail passage (1_A , 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) into a sail passage (2_C, 3_C, 6_C, 7_C, 2_A, 3_A, 6_A, 7_A, 8_A) which is also common for a subset of the function entry-side sail flights (2_A, 3_A, 6_A, 7_A, 8_A), likewise non-tractive. 8_C) is changed, in which a number of switching elements, which corresponds to the number of closed in a traction transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) switching elements, is closed so that a Getriebeausgan shaft (8) of the transmission (2) rotates freely and the remaining components of the transmission (2) are locked in the direction of the drive unit (14), wherein exclusively from the respective functional entry-side sail passage (1_A, 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) is switched into the sail course (2_C, 3_C, 6_C, 7_C, 8_C) which is common for the subset of sail flights (2_A, 3_A, 6_A, 7_A, 8_A) when the drive assembly (14) is stopped, when in the Sailing mode has been entered from a traction-transmitting gear (V1, V2, V3, V6, V7, V8) out in the respective functional entry-side sail passage (2_A, 3_A, 6_A, 7_A, 8_A), in which all but one switching elements (A, C, E) of the subset of the sail courses (2_A, 3_A, 6_A, 7_A, 8_A) common sail passage (2_C, 3_C, 6_C, 7_C, 8_C) are closed.

Description

The invention relates to a method for operating a motor vehicle. Furthermore, the invention relates to a control device for carrying out the method.

From the DE 10 2011 005 320 A1 a method for operating a motor vehicle is known, which comprises a drive unit, a transmission and an output, wherein the transmission is connected between the drive unit and the output. After DE 10 2011 005 320 A1 is activated depending on at least one operating condition of the motor vehicle, a sailing mode for the motor vehicle and subsequently deactivated depending on at least one operating condition of the motor vehicle, the sailing mode. After DE 10 2011 005 320 A1 Under a sail mode, an operating mode of the motor vehicle is to be understood, in which the traction transmission is interrupted in the transmission to the output while the drive unit is running. In sailing mode, therefore, the drive unit is decoupled from the output and runs. After DE 10 2011 005 320 A1 is activated during the drive of the motor vehicle with running, coupled to the output engine of the sailing mode when a driver-dependent accelerator pedal actuation driver input torque or predetermined by a driver assistance system driving torque for a defined time in a defined range and if the current acceleration or Delay of the motor vehicle is within a defined range. The DE 10 2011 005 320 A1 further discloses various conditions for disabling a previously activated sailing mode.

From the DE 10 2010 000 857 A1 For example, another method for operating a motor vehicle by providing a sailing mode for the motor vehicle is known. According to this prior art, when sailing in the transmission, a maximum number of shift elements are transferred to a closed operating state and the other part of the shift elements are brought into an open operating state and / or held, wherein the transmission output shaft is rotatable. It can be sailed with the drive unit running and shut down drive unit.

Shall after the DE 10 2010 000 857 A1 are changed starting from a traction-transmitting gear in the sailing mode, starting from the respective zugkraftübertragenden gear each changed in the same league, in which a maximum number of switching elements is transferred to a closed operating state, while providing the decoupling of the drive unit from the transmission output shaft while ensuring the rotatability of the transmission output shaft.

Although methods are already known in the prior art, with the aid of which defined in a sailing mode and on the other hand can be stepped out of the sailing mode defined, there is a need to improve the operation of the motor vehicle in sailing mode.

On this basis, the invention is based on the object to provide a novel method for operating a motor vehicle and a control device for operating a motor vehicle. This object is achieved by a method for operating a motor vehicle according to claim 1 and by a method for operating a motor vehicle according to claim 2 and by a method for operating a motor vehicle according to claim 3.

To get into the sailing mode from a currently engaged, traction-transmitting gear out one of the currently traction transmitting gear closed switching elements is opened, so then in the sailing mode a functional entry-side, non-traction-transmitting sail gear is active, in which a switching element is less closed than in the respective zugkraftübertragenden Gear.

In a first aspect of the invention, when in sailing mode, the drive unit is stopped, while maintaining the sail mode from the respective functional entry-side sail passage in a subset of the functional entry-side leagues common and also non-traction-transmitting league gear changes, in which a number of switching elements, which corresponds to the number of closed in a zugkraftübertragenden gear shift elements, is closed so that a transmission output shaft of the transmission rotates freely and the other components of the transmission are locked in the direction of the drive unit.

According to the first aspect of the invention is only then changed from the respective functional entry-side sail passage in the common for the subset of sail sails course at stoppages of the drive unit, when in the sailing mode from a zugkraftübertragenden gear out in the respective functionseinstiegsseitigen sail passage has entered, in which up a switching element all the switching elements of the common for the subset of sail sails sail are closed.

With the invention, therefore, to get into the sailing mode from a currently inserted, traction-transmitting gear out one of the currently engaged, traction-transmitting gear closed switching elements open. Based on the respective engaged, traction-transmitting gear is therefore changed to an individual, functional entry-side sail passage, in which a switching element is less closed than in the previously engaged gear. Here the drive unit runs.

If subsequently the drive unit is stopped in the sailing mode, according to the first aspect of the invention the sail mode is switched from the functional entry-side sail passage into the common sail passage for the subset of sail flights, in which a number of shift elements are closed, corresponding to the number of traction-transmitting ones Gear closed switching elements corresponds. In the common for the subset of sail sails sail gear therefore a switching element is more closed than in a functional entry-side sail gear, the transmission output shaft rotates freely and the other components of the transmission are blocked.

In these common for the subset of sail sails sail gear is changed only at Stilsetzten the drive unit when it has entered the sailing mode from a zugkraftübertragenden gear out, in which are closed except for all the switching elements of the common sail sails course.

Hereby, the sailing mode of a motor vehicle can be improved. Functional entry sails are individual and allow easy exit from the sailing mode, e.g. in the previously inserted, traction-transmitting gear. Only then, when the drive unit is stopped in the sailing mode, is switched to the common for the subset of sail sails course, in which a switching element is more closed, as in the func- tion entrance side sails. However, this takes place only if in the sailing mode has been entered from a zugkraftübertragenden gear out, in which are closed except for a switching element all the switching elements of the common for the subset of sail sails sail passage. This ensures that it is easy to get out of the sail passage common to sailing.

In a second aspect of the invention, the selection of the respective closed in the sail gears switching elements is such that in at least one of the leagues, the gearbox when leaving the sailing mode starting from this sailing gear in at least three different zugkraftübertragende gears is switchable by the respective zugkraftübertragenden gear zugkraftherstellende switching element is selected from the sailing mode currently open switching elements gear specific and closed. Thus, there is a subset of the sails, which includes at least a common sail passage from which the gear can be switched in three different zugkraftübertrage gears.

Again, the sailing mode of a motor vehicle can be improved. Such a common sail passage allows a diversely controllable exit from the sailing mode in a situation favorable zugkraftübertragenden gear.

In a third aspect of the invention, the selection of the respective closed in the sail gears switching elements is such that the same switching elements are closed in several sail gears and thereby several common leagues are formed, so that the gear when leaving the sailing mode, starting from each of these common leagues in at least two different traction-transmitting gears is switchable by the zugkraftherstellende switching element zugkraftherstellende in the respective zugkraftübertragenden gear selected from the sailing mode currently open switching elements gear specific and closed. Thus, there is a subset of the leagues that includes two or more common leagues, out of which the transmission can be shifted into at least two different traction-transmitted gears.

Again, the sailing mode of a motor vehicle can be improved. The presence of several common leagues allows a diverse controllable exit from the sailing mode in a situatively favorable traction-transmitting gear.

Common to all three aspects of the invention is that is opened for entry into the sailing mode from a currently engaged, traction-transmitting gear out one of the currently zugkraftübertragenden gear closed switching elements, so then in the sailing mode a functional entry-side, non-traction-transmitting sail gear is active, in which a switching element is less closed than in the respective traction-transmitting gear.

It is also common in all three aspects of the invention that the same shifting elements of the transmission are closed in a subset of the possible sailing gears, so that at least one common sail path results. When leaving the sailing mode, starting from a common sail passage, the transmission is through a gear-specific selection of that Switching element that produces the tensile force in the transmission when closing, switchable in different traction-transmitted gears.

According to a development of the invention, when in sailing mode, a speed of the transmission output shaft reaches or exceeds a threshold, out of at least one sail passage out, in particular either at least one functional entry-side sail out and / or out of the common for the subset of sail sails sail out, in changed an individual, alternative sail course, in which a switching element is less closed than in a traction-transmitting gear. Hereby can be safely and reliably avoided that when sailing the gearbox is damaged due to high speeds.

According to another embodiment of the invention, when in the sailing mode, a speed of the transmission output shaft falls below a gear-dependent predefined threshold value, out of the sail gear, changed in an individual, alternative lower league, in which a switching element is less closed than in a traction-transmitting gear. Hereby, the transmission can be adapted to changing driving speeds of the motor vehicle, so that the gearbox can be switched when exiting the sailing mode in a suitable driving current speed frictional leading gear.

In the context of all three aspects of the invention, a further switching element is closed to exit from the sailing mode from a functional entry-side sail out to change into a traction-transmitting gear, in which closed in the respective functional entry side sail gear switching elements are closed.

In the context of all three aspects of the invention, another switching element is closed to exit the sailing mode from the individual, alternative sail gear out to change into a zugkraftübertragendem gear, in which closed in the individual, alternative sail gear switching elements are closed.

In the context of the first aspect of the invention, a single switching element, which is closed in common for the subset of sail sails course, opened to exit from the sailing mode from the common for the subset of sail sails out gear, also a single switching element, which is in for the subset of the sails common sail passage is open, closed.

In the context of the second aspect of the invention and in the context of the third aspect of the invention, a single switching element, which is open in the respective common sail passage, is closed for exiting the sailing mode from each of the common sail flights out. Thus, the selection of zugkraftherstellenen switching element determined from the amount of previously opened in sail mode switching elements that zugkraftübertragenden gear, in which the transmission is switched when leaving the sail mode, of course, taking into account the logic of the transmission to avoid an unacceptable switching element combination. It is advantageous that the selection of the switching element to be closed, the transmission when leaving the sailing mode from each common sail gear in different zugkraftübertragende gears is switchable.

Thus, it is possible to change from all the sailing gears defined into a traction-transmitting gear to end the sailing mode.

The control device according to the invention according to the first aspect of the invention is defined in claim 13.

The control device according to the invention according to the second aspect of the invention is defined in claim 15.

The inventive control device according to the third aspect of the invention is defined in claim 17.

• 1 eine Getriebeschema eines Getriebes eines Kraftfahrzeug;
• 2 eine Schaltmatrix des Getriebes der 1; und
• 3 eine Segelmatrix des Getriebes der 1.

Preferred developments emerge from the subclaims and the following description. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:

• 1 a transmission diagram of a transmission of a motor vehicle;
• 2 a switching matrix of the transmission of 1 ; and
• 3 a sail matrix of the transmission of 1 ,

The invention relates to a method and a control device for operating a motor vehicle.

1 shows a schematic of a powertrain 1 a motor vehicle with a transmission 2 which is between a drive unit 14 and a downforce 15 is switched. In the transmission 2 It is an automatic or automated manual transmission with multiple wheel planes 3 . 4 . 5 . 6 as well as several switching elements 9 . 10 . 11 . 12 and 13 , The switching elements 9 . 10 . 11 . 12 and 13 are also called switching elements A, B . C . D and e denotes, in the illustrated embodiment all switching elements 9 to 13 or. A to e are designed as frictional switching elements. At the switching elements A and B these are brakes and the shifting elements C . D and e around couplings.

In each inserted, traction-transmitting gear of the transmission 2 a first, defined number of switching elements is closed and opened a second, defined number of switching elements. Like the switching matrix of 2 for the transmission 2 the 1 shows are in each engaged, traction-transmitting gear, so in the forward gears V1 to V8 as well as in reverse R , three switching elements are closed and two switching elements open, wherein those switching elements which are closed in the respective traction-transmitting gear, in the switching matrix of 2 are marked by a dot.

The transmission scheme of 1 as well as the switching matrix of 2 are known in principle from the prior art and therefore require no further explanation. In this regard, be on the DE 10 2005 002 337 A1 referenced, from which the transmission scheme of 2 as well as the switching matrix of 2 already known. For the sake of completeness, it should be pointed out at this point that it is the wheel planes 3 . 4 . 5 . 6 is about planetary gear stages, wherein the switching elements 9 . 10 . 11 . 12 and 13 defined on individual elements of these planetary gear stages and in the case of the brakes A, B also attack the housing side.

The drive unit 14 is to a transmission input shaft 7 and the downforce 15 to a transmission output shaft 8th of the transmission 2 coupled. Depending on the closed in a traction transmitting gear shift elements, the transmission 2 a defined translation ready to convert speeds and torques and so the traction of the drive unit 14 at the output 15 provide.

The in 1 shown powertrain 1 with the in 1 shown gear 2 can be operated in a sailing mode, wherein in the sailing mode, the drive unit 14 from the downforce 15 disconnected. It is already known in principle that, starting from each inserted, traction-transmitting gear, namely starting from each forward gear 1 to 8th , depending on at least one operating condition of the motor vehicle in a sailing mode can be entered and that subsequently can be dropped out of the sailing mode depending on at least one further operating condition of the motor vehicle. Operating conditions, depending on which entered into a sailing mode or depending on which is withdrawn from a sailing mode, are familiar to the person mentioned here.

For the purposes of the present invention is for entry into the sailing mode from a currently engaged, traction-transmitting gear, namely from one of the forward gear 1 to 8th out, one of the closed in the currently engaged gear switching elements open, so then in the sailing mode, a functional entry-side sail passage is active, in which a switching elements is less closed than in the traction-transmitting gear. These functional entry-side sails are in particular the sails 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A and 8_A the sailing matrix of the 3 ,

Therefore, for example, in the forward power transmitting forward gear 1 driven, then the switching element is to enter the sailing mode C opened, the switching elements A and B stay closed. On the other hand, it is in a traction-transmitting forward gear 2 drove, and should proceed from this forward gear 2 be entered in the sailing mode, so in particular the sail passage 2_A chosen in which the switching element E is open and the switching elements A and B stay closed. Starting from each forward gear 1 to 8th can therefore in an individual, functional Einstiegsseitigen sail gear 1_A to 8_A be changed by one of the previously engaged, traction-transmitting forward gear 1 to 8th closed switching element is opened.

Those switching elements, for the change in the respective functional entry-side sail passage 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A and 8_A are in the sailing matrix the 3 characterized by a circle, whereas those switching elements in the respective function-entry side sail passage 1_A to 8_A remain closed, in the sailing matrix of 3 are visualized by a dot.

Then, if from a currently engaged, zugkraftübertragenden forward gear 1 to 8th in one of the functional entry-side sails 1_A to 8_A is changed, is the drive unit 14 still switched on or running. Subsequently, the drive unit 14 switched off or shut down.

Is subsequently the drive unit in active sail mode 14 shut down, it is in accordance with the first aspect of the present invention, while maintaining the sailing mode from the respective functional entry-side sail passage 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A or 8_A changed into a common for a subset of sail Sail, in which a number of Switching elements is closed, which corresponds to the number of closed in a traction-transmitting gear switching elements, while providing the free rotation of the transmission output shaft 8th as well as blocking the other components of the transmission 2 in the direction of the drive unit 14 , This sail course common to the subset of the sails is in the sailing matrix of the 3 as a sail passage 2_C . 3_C . 6_C . 7_C and 8_C reproduced, in each of which the switching elements A . C and e is closed or are.

In this case, starting from a function-entry-side sail passage only when stopping the drive unit 14 in the common for the subset of sail Sails, in which the switching elements A . C and e are closed, changed when in the sailing mode has been entered from a traction-transmitting gear out, in which are closed except for one of all the switching elements of the common for the subset of sail sails sail passage.

In other words, this means that only when stopping the drive unit 14 in the common for sailing courses Segelgang 2_C . 3_C . 6_C . 7_C or. 8_C in which the switching elements A . C and e are closed, is changed, if from one of the forward gears 2 . 3 . 6 . 7 or 8th out into the respective functional entry-side sail passage 2_A . 3_A . 6_A . 7_A and 8_A was changed, being in the forward gears 2 . 3 . 6 . 7 and 8th two of the three switching elements are closed, which are closed in the common for the subset sail courses gear, so two of the three switching elements A . C and e ,

The subset of the leagues, for in the common sail course at stoppages of the drive unit 14 can be changed, so includes the functional entry-side sails 2_A . 3_A . 6_A . 7_A and 8_A ,

It should be noted at this point that, in particular, if from one of the forward power transmitting forward gears 1 to 8th out to sail in one of the functional entry-side sails 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A or 8_A is entered and subsequently with still running drive unit 14 The sailing is to be stopped again, from the respective functional entry-side sail passage 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A or 8_A out of the sailing can also be dropped out again. The functional entry-side sails 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A or 8_A serve therefore also as function exit side sailing courses to finish by closing a switching element sailing. The corridors 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A or 8_A are therefore function entry side and function exit side sails.

Then, when in sailing mode, a speed of the transmission output shaft 8th reaches or exceeds a threshold, is changed to an individual, alternative sail course, in which a switching element is less closed than in a traction-transmitting gear. It can be changed out of the functional entry-side sail passage or out of the common for the subset of sail sails sail passage in this individual, alternative Sailing gear.

This is done in the sailing matrix of 3 exclusively for forward gear 8th , where it is at the for the forward gear 8th individual, alternative sail around the sail passage 8_D acts in which the switching elements A and e closed and the switching element D is open.

In addition to the sails 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A . 8_A , for the gears 2 . 3 . 6 . 7 and 8th common sail passage 2_C . 3_C . 6_C . 7_C or. 8_C as well as for the forward gear 8th individual, alternative sailing course 8_D shows the sail matrix of the 3 additionally further sail courses 1_B . 2 B . 3_B . 4_B . 6_B ,

For these other sailing courses 1_B . 2 B . 3_B . 4_B . 6_B is the logic of the right column of the sailing matrix 3 meaning, wherein the logic states I, II, III, IV, V, VI and VII respectively switching elements of the transmission 2 Visualize, which are closed in the respective sail course. For example, starting from the forward gear 6 in the functional entry-side sail passage 6_A changed, so are the switching elements C and e closed, which corresponds to the logic state IV. To terminate the sailing mode can then according to the logic state IV either in forward gear 6 by closing the switching element D with closed switching elements C and E changed, alternatively, in forward gear 3 by closing the switching element B with closed switching elements C and e change.

Was, for example, starting from a drive in forward gear 8th first in the functional entry-side sail passage 8_A and subsequently after stopping the drive unit in the common for the subset of sail sails sail passage 8_C changed in which the switching elements A . C and e are closed, so is the logic state VII, in which case by opening one of these switching elements and subsequently by closing another switching element to exit the sailing mode in the forward gear 2 or the forward gear 3 or the forward gear 6 or the forward gear 7 or the forward gear 8th can be changed.

The other sail courses 1_B . 2 B . 3_B . 4_B . 6_B are not only for the exit from the sailing mode of importance, but the other sailing courses 1_B . 2 B . 3_B . 4_B . 6_B Depending on the driving situation, they can also be used as entry-level sails. If z. B. in forward gear 3 driven and should from the forward gear 3 can be boarded out into sailing, so depending on the driving situation in the sail passage 3_A or 3_B be entered. For example, in the forward power-transmitting forward gear 3 driven at a constant speed and should be entered into sailing, so preferably the sail passage 3_A used for the function entry. On the other hand, it is in the forward power-transmitting forward gear 3 accelerated and should be entered from this driving situation in sailing, so can the sail passage 3_B be used for the function entry.

The other sail courses 1_B . 2 B . 3_B . 4_B . 6_B are therefore function exit side sails and function entry side sails. The other, functional entry-side sails 1_B . 2 B . 3_B . 4_B . 6_B are not available for every forward power-transmitting gear, but only for the forward gear 1 . 2 . 3 . 4 and 6 , For the forward passage 5 . 7 and 8th are only the functional entry side sails 5_A . 7_A and 8_A to disposal.

For sailing in one of the other, function-Einstiegsseitigen sail courses 1_B . 2 B . 3_B . 4_B . 6_B entered and is subsequently in active sail mode, the drive unit 14 shut down, it is in accordance with the first aspect of the present invention, while maintaining the sailing mode from the respective functional entry-side sail passage 1_B . 2 B . 3_B . 4_B or 6_B changed into the common for the subset of sail sails course, in which the switching elements A . C and e are closed. In this case, starting from a function-entry-side sail passage only when stopping the drive unit 14 in the common for the subset of sail Sails, in which the switching elements A . C and e are closed, changed when in the sailing mode has been entered from a traction-transmitting gear out, in which are closed except for one of all the switching elements of the common for the subset of sail sails sail passage. When the drive unit stops 14 can therefore from the functional entry side sails 2_A . 3_A . 6_A . 7_A and 8_A and from the function-entry-side sails 2 B and 3_B in the common for sailing courses Segelgang 2_C . 3_C . 6_C . 7_C or. 8_C , in which the switching elements A, C and E are closed, to be changed.

Because both the sails 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A . 8_A as well as the sail courses 1_B . 2 B . 3_B . 4_B . 6_B can be used as functional entry-side sails, it is also easily possible to mix these two categories in the context of the method according to the invention. A selection 1_A . 2_A . 3_B . 4_A . 5_A . 6_A . 7_A . 8_A for example, as a function-entry-side sail flights causes the sail gears 1_A and 2_A a first common sail course and the sail courses 3_B and 6_A represent a second common sail passage, with the advantage that the transmission 2 when exiting the sailing mode from the second common sail passage out by selecting the frictional circuit producing switching element either in the third or sixth forward transmission vorgangsgang V3 . V6 can be switched while the transmission 2 when leaving the sailing mode from the first common sail passage out unchanged either in the first or second frictionally transmitted forward gear V1 . V2 can be switched. Another selection 1_B . 2_A . 3_A . 4_B . 5_A . 6_B . 7_A . 8_A for example, as a function-entry-side sail flights causes the sail gears 1_B and 3_A a first common sail course and the sail courses 4_B . 6_B and 8_A represent a second common sail passage, with the advantage that the transmission 2 now when you exit the sailing mode from the first common sail passage out by selecting the frictional circuit producing switching element either in the first or third forward transmission vorzgang V1 . V3 and in the exit from the sailing mode from the second common sail passage out by selecting the frictional circuit producing switching element either in the fourth, sixth or eighth frictional transmitted forward gear V4 . V6 . V8 can be switched. Through skillful selection of the functional entry-side sail courses, taking into account the predetermined switching logic of the transmission 2 - here in 2 pictured - it is thus possible to specify the number and type of gears in the transmission 2 when leaving the sailing mode as a transitional gears available situational.

To exit the sailing mode from a functional entry-level sail passage 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A . 8_A out a previously opened switching element is closed to switch to a traction-transmitting gear, in which the closed in function function side sail passage switching elements are closed. The available traction-transmitting gears follow from the logic states I, II, III, IV, V, VI and VII.

Out 3 It can also be seen that the so selected functional entry-side sails 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A . 8_A advantageously include a subset of individual sailing gears that allow the transmission 2 when exiting the sailing mode starting from a contained in this subset sail gear in three different zugkraftübertragende gears is switchable by zugkraftherstellende the switching element in the respective zugkraftübertragenden gear from the sailing mode currently open switching elements is gear specific selected and closed, according to the second aspect of the present invention. This is how the transmission can start from the sail passage 8A in which the fourth and fifth switching elements D . e are closed, are closed by closing only one other switching element in three different power transmission transmitting gears, namely by closing the switching element A in the eighth forward gear V8 , By closing the third switching element C in the sixth forward gear V6 and by closing the second switching element B in the fourth forward gear V4 , Also, the gear can 2 starting from the sail passage 5A in which the second and third switching elements B . C are closed, are switched by closing only one other switching element in three different power transmitting gears, namely by closing the switching element D in the fifth forward gear V5 , By closing the fifth switching element E in the third forward gear V3 and by closing the first switching element A in the first forward gear V1 , Then the transmission is also starting from the third sail passage 3A in which the second and third switching elements B . C are closed, closed by closing only one other switching element in three different power transmission-transmitting gears, namely by closing the fifth switching element e in the third forward gear V3 , By closing the first switching element A in the first forward gear V1 and by closing the fourth switching element D in the fifth forward V5 , Thus, the selection fulfills functional entry-side sails 1_A . 2_A . 3_A . 4_A . 5_A . 6_A . 7_A . 8_A also the third aspect of the present invention.

Also for the exit from the sailing mode from a functional entry-side sail passage 1_B . 2 B . 3_B . 4_B . 6_B out a previously opened switching element is closed to switch to a traction-transmitting gear, in which the closed in function function side sail passage switching elements are closed. The available traction-transmitting gears in turn follow from the logic states I, II, III, IV, V, VI and VII.

To exit from the sailing mode from the common for the subset sail courses 2_C . 3_C . 6_C . 7_C or. 8_C out, according to the first aspect of the present invention, a single switching element, which is closed in the common for the sail sails course, opened, and further, a single switching element, which is open in common for the Sail aisle, closed. The exit from the Funktionsseinstiegsseitigen sail courses out and the exit from the common for the Sail gear out, can be done with minimal effort.

As a result, the present invention is therefore not limited to the fact that when leaving the sailing mode, only a specific switching element per sailway is closed in order to restore traction in the transmission. Rather, in the present invention in individual sailing gears up to three different, alternatively controllable switching elements are closed when leaving the sailing mode, so that it is possible to restore the traction in the gearbox in a different gear than in the inserted in the sailing mode kraftschlussführenden Gear.

Then, the present invention allows in sailing mode also a gear tracking. An automatic gear tracking can be useful or even necessary if the driving speed of the motor vehicle in active sail mode changed so that the previously inserted sail gear no longer correlated with the current speed. In such a case, the gear track adapts the sail passage to the changed conditions by opening one of the two closed switching elements and closing another one of the three previously open switching elements. If the motor vehicle, for example, starting from the force-transmitting gear V6 "Sailing", this is in the transmission 2 first the sail passage 6_A inserted. Delays the motor vehicle now, for example, due to wind resistance, there is a need for the sail passage 6_A in which the switching elements C and e are closed, switch to the sail passage 5_A in which the switching elements B and C must be closed, so in the context of gear tracking so the switching element e to open and the switching element B to close.

Also, the present invention provides protection for the transmission 2 against destruction by overspeed. Then, when to protect against overspeed in the gearbox has been changed to an individual, alternative Sail, for example, from the Sail 8_A or 8_C in the individual sailing course 8_D , so will the exit closed an additional switching element from the sailing mode, which was previously opened, according to the logic state VI, either the switching element D or the switching element B to start from the sails 8_D in the forward gear 8th or in the forward gear 2 switch.

The invention further relates to a control device for carrying out the method according to the invention. The control device is preferably an electrical or electronic transmission control device of the transmission 2 , Such a transmission control device comprises means for carrying out the method, wherein these means are hardware-side means and software-side means. The hardware resources include data interfaces for exchanging data with the modules involved in the execution of the method according to the invention, for example to control switching elements for closing or opening. Furthermore, the hardware resources are a data storage for data storage and a processor for data processing. The software means include program blocks which are stored in the memory and executed by the processor. The control unit is used for the control-side execution of the method described above.

LIST OF REFERENCE NUMBERS

1

powertrain

2

transmission

3

wheel plane

4

wheel plane

5

wheel plane

6

wheel plane

7

Transmission input shaft

8th

Transmission output shaft

9

switching element A

10

switching element B

11

switching element C

12

switching element D

13

switching element e

14

power unit

15

output

V1

first forward power transmitting forward gear

V2

second traction-transmitting forward gear

V3

third forward power-transmitting forward gear

V4

fourth traction-transmitting forward gear

V5

fifth traction-transmitting forward gear

V6

sixth forward power transmitting forward gear

V7

seventh forward power transmitting forward gear

V8

Eighth forward power transmitting forward gear

R

traction-transmitting reverse gear

1_A

first sail in sailing logic state I

1_B

first sailing course in sailing logic state III

2_A

second sail in sailing logic state I

2_C

second sail in sailing logic state VII

2 B

second sail course in sailing logic state VI

3_A

third sail passage in sailing logic state III

3_C

third sail passage in sailing logic state VII

3_B

third sail passage in sailing logic state IV

4_A

fourth sail passage in sailing logic state II

4_B

fourth sail passage in sailing logic state V

5_A

fifth sail in sailing logic state III

6_A

sixth sail passage in sailing logic state IV

6_C

sixth sail passage in sailing logic state VII

6_B

sixth sail passage in sailing logic state V

7_A

seventh sail passage in sailing logic state VIII

7_C

seventh sail passage in sailing logic state VII

8_A

eighth sail passage in sailing logic state V

8_C

Eighth Sail in Sail Logic State VII

8_D

Eighth Sail in Sail Logic State VI

Claims (18)

Method for operating a motor vehicle with a drive unit (14), a transmission (2) and an output (15), wherein the transmission (2) is designed as an automatic transmission, in the power flow between the drive unit (14) and output (15) is connected and a plurality of switching elements (9, 10, 11, 12, 13, A, B, C, D, E), wherein in each inserted, traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) the transmission (2) a first number of switching elements is closed and a second number of switching elements is opened, depending on at least one operating condition of the motor vehicle in a sailing mode of the same boarded, and is subsequently dropped out of the sailing mode depending on at least one operating condition of the motor vehicle , characterized in that for entry into the sailing mode from a currently engaged, traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) out of the currently zugkraftübe ruling gear closed switching elements of the transmission (2) is opened, so then in the sailing mode a functional entry-side, non-traction-transmitting sail passage (1_A, 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) is active, in which a switching element is less closed than in the respective traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8), and that when in the sailing mode, the drive unit (14) is stopped, while maintaining the sail mode from the respective function-entry side sail passage (1_A , 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) into a sail passage (2_C, 3_C, 6_C, 7_C, 2_A, 3_A, 6_A, 7_A, 8_A) which is also common for a subset of the function entry-side sail flights (2_A, 3_A, 6_A, 7_A, 8_A), likewise non-tractive. 8_C) in which a number of switching elements corresponding to the number of switching elements closed in a traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) is closed such that a transmission is off input shaft (8) of the transmission (2) rotates freely and the remaining components of the transmission (2) are locked in the direction of the drive unit (14), wherein exclusively from the respective functional entry-side sail passage (1_A, 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) is switched into the sail course (2_C, 3_C, 6_C, 7_C, 8_C) which is common for the subset of sail flights (2_A, 3_A, 6_A, 7_A, 8_A) when the drive assembly (14) is stopped, when in the Sailing mode has been entered from a traction-transmitting gear (V1, V2, V3, V6, V7, V8) out in the respective functional entry-side sail passage (2_A, 3_A, 6_A, 7_A, 8_A), in which all but one switching elements (A, C, E) of the subset of the sail courses (2_A, 3_A, 6_A, 7_A, 8_A) common sail passage (2_C, 3_C, 6_C, 7_C, 8_C) are closed. Method according to the preamble of Claim 1 , characterized in that for the entry into the sailing mode from a currently engaged, traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) one of the currently traction transmitting gear closed switching elements of the transmission (2) is opened out so that then in the sailing mode, a functional entry-side, non-traction-transmitting sail passage (3_A, 4_B, 5_A, 6_A, 6_B, 8_A) is active, in which a switching element is less closed than in the respective traction-transmitting gear, wherein the selection of the in the sail courses ( 3_A, 5_A; 4_B, 6_B, 8_A) in each case closed switching elements (B, C, D, E) is carried out such that in at least one of the leaflets (3_A, 5_A; 4_B, 6_B, 8_A) the gearbox (2) when leaving the sail mode starting from this sail gear in at least three different traction transmitting gears (V1, V3, V5, V4, V6, V8) is switchable by the zugkraftherstellende Scha in the respective zugkraftübertragenden gear (V1, V3, V5, V4, V6, V8) ltelement (A, E, D; B, C, A) from the in sailing mode currently open switching elements is selected specific and closed. Method according to the preamble of Claim 1 , characterized in that for entry into the sailing mode from a currently engaged, traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) out of the currently traction transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) closed switching elements (A, B, C, D, E) of the transmission (2) is opened, so then in the sailing mode a functional entry-side, non-traction-transmitting sail passage (1_A, 1_B, 2_A, 3_A, 3_B , 4_A, 4_B, 5_A, 6_A, 6_B, 7_A, 8_A) is active, in which a switching element is less closed than in the respective traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) the selection of the switching elements respectively closed in the sail courses takes place in such a way that the same switching elements (A, B; C, E; B.) are arranged in several sail courses (1_A, 2_A; 3_B, 6_A; 1_B, 3_A, 5_A; 4_B, 6_B, 8_A) , C; D, E) are closed and thereby several common sail courses (1_A, 2_A; 3_B, 6_A; 1_B, 3_A; 4_B, 6_B, 8_A) are formed so that the transmission b in the exit from the sailing mode, starting from each of these common sailing courses (1_A, 2_A; 3_B, 6_A; 1_B, 3_A; 4_B, 6_B, 8_A) can be shifted into at least two different traction-transmitting passages (V1, V2; V3, V6; V1, V3; V4, V6, V8) by the gear (V1, V2; V3, V6; V1 , V3, V4, V6, V8) switching elements (C, E, B, D, A, E, B, C, A) which are produced by traction, are gear-specifically selected and closed from the switching elements currently open in sailing mode. Method according to Claim 2 or 3 , characterized in that for the exit from the sailing mode from a common sail passage (1_A, 2_A; 3_B, 6_A; 1_B, 3_A; 4_B, 6_B, 8_A) out a single switching element (C, D, E, A, B, D; A, D, E, A, B, C), which is open in this common sail passage (1_A, 2_A; 3_B, 6_A; 1_B, 3_A; 4_B, 6_B, 8_A), is closed. Method according to Claim 1 , characterized in that for the exit from the sailing mode from the for the subset of sail courses (2_A, 3_A, 6_A, 7_A, 8_A) common sail passage (2_C, 3_C, 6_C, 7_C, 8_C) out a single switching element (A, C, E) which is closed in the sail passage (2_C, 3_C, 6_C, 7_C, 8_C) which is common to the subset of sail flights (2_A, 3_A, 6_A, 7_A, 8_A), and also a single shift element (B, D) which is closed in the sail passage (2_C, 3_C, 6_C, 7_C, 8_C) which is common to the subset of sail flights (2_A, 3_A, 6_A, 7_A, 8_A). Method according to one of Claims 1 to 5 , characterized in that when in the sailing mode, a speed of the transmission output shaft (8) of the transmission (2) reaches or exceeds a threshold, is changed out of at least one sail passage in an alternative league, in which a switching element is less closed than in one traction-transmitting gear. Method according to one of Claims 1 to 6 , characterized in that when in the sailing mode, a speed of the transmission output shaft (8) of the transmission (2) falls below a transition-dependent predefined threshold, is changed from the current sail gear out in an alternative lower league, in which a switching element is less closed than in a traction-transmitting gear. Method according to Claim 6 or 7 , characterized in that is changed in the alternative sailing gear either from at least one functional entry-side sail out and / or out of a common sail passage out. Method according to Claim 7 or 8th , characterized in that the exit from the sailing mode from the alternative sail gear out another switching element is closed to switch to a zugkraftübertragendem gear, in which the closed in the individual, alternative sailing gear switching elements are closed. Method according to one of Claims 1 to 9 , characterized in that the exit from the sailing mode from a functional entry-side sail gear out another switching element is closed to switch to a traction-transmitting gear, in which the closed on functionseinstiegsseitigen sail gear switching elements are closed. Method according to one of Claims 1 to 10 characterized in that the transmission (2) comprises a first shift element (9; A), a second shift element (10; B), a third shift element (11; C), a fourth shift element (12; D) and a fifth shift element ( 13, E), wherein in a first traction forward gear (V1), the first, second and third shifting elements (A, B, C) are closed and then, when the first traction-transmitting gear (V1) is engaged in the sailing mode, the second switching element (B) remains closed, wherein in a second zugkraftübertragenden forward gear (V2), the first, second and fifth switching element (A, B, E) are closed and then, when ingested second traction transmitting gear (V2) is entered in the sailing mode , the first switching element (A) remains closed, wherein in a third zugkraftübertragenden forward gear (V3), the second, third and fifth switching element (B, C, E) are closed and then when zugkr the third shift element (C) remains closed, wherein in a fourth forward traction (V4), the second, fourth and fifth shift element (B, D, E) are closed and then, if at engaged fourth traction-transmitting gear (V4) is entered in the sailing mode, the fourth switching element (D) remains closed, wherein in a fifth forward traction transmitting (V5) the second, third and fourth switching element (B, C, D) are closed and then, when in fifth engaged power transmission gear (V5) is entered in the sailing mode, the fourth switching element (D) is opened, wherein in a sixth forward traction transmitting (V6), the third, fourth and fifth switching element (C, D, E) are closed and when the fifth traction element (E) remains closed when the sixth traction-transmitting gear (V6) is engaged in the sailing mode, w obei in a seventh forward traction transfer (V7), the first, third and fourth switching elements (A, C, D) are closed and then, when the seventh traction transmitting gear (V7) is entered in the sailing mode, the fourth switching element (D) opened and in an eighth forward traction forward gear (V8), the first, fourth and fifth shift elements (A, D, E) are closed and then, when when the eighth traction-transmitting gear (V8) is engaged in the sailing mode, the fifth shifting element (E) remains closed. Method according to Claim 1 and 11 , characterized in that in the common, non-traction-transmitting sail gear (2_C, 3_C, 6_C, 7_C, 8_C), the first, third and fifth switching element (A, C, E) are closed. Control unit for operating a motor vehicle with a transmission (2) comprising a plurality of shift elements (9, 10, 11, 12, 13; A, B, C, D), wherein the control device activates a sailing mode thereof depending on at least one operating condition of the motor vehicle or in the same enters, and wherein the control unit subsequently deactivated depending on at least one operating condition of the motor vehicle sailing mode or from the same, characterized in that the control unit for entering the sailing mode from a currently engaged, traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) out one of the currently traction transmitting gear closed switching elements (9, 10, 11, 12, 13, A, B, C, D, E) of the transmission (2) opens control side, so that then in the sailing mode, a functional entry-side, non-traction-transmitting sail passage (1_A, 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) is active in which a switching element is less closed a ls in the respective traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8), that the control unit, when in the sailing mode, the drive unit (14) is stopped, while maintaining the sail mode from the respective function-Einstiegsseitigen league ( 1_A, 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) into a sail passage (2_C, 3_C, 6_C, 7_C) which is also common for a subset of the function-entry-side sail flights (2_A, 3_A, 6_A, 7_A, 8_A) and which also transmits no traction , 8_C) on the control side, in which a number of switching elements corresponding to the number of switching elements closed in a traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8) are closed in such a way that a transmission output shaft ( 8) of the transmission (2) rotates freely and the other components of the transmission (2) are locked in the direction of the drive unit (14), wherein the control unit exclusively then control side from the respective functionseinstiegsseitigen blessing lgang (1_A, 2_A, 3_A, 4_A, 5_A, 6_A, 7_A, 8_A) in the for the subset of sail courses (2_A, 3_A, 6_A, 7_A, 8_A) common league (2_C, 3_C, 6_C, 7_C, 8_C) at Shutdown of the drive unit (14) changes when in the sailing mode from a traction-transmitting gear (V1, V2, V3, V6, V7, V8) out in the respective functional entry-side sail passage (2_A, 3_A, 6_A, 7_A, 8_A) was entered, in which are closed except for one all switching elements (A, C, E) of the subset of the leaflets (2_A, 3_A, 6_A, 7_A, 8_A) common sail passage (2_C, 3_C, 6_C, 7_C, 8_C). Control unit after Claim 13 , characterized in that the same means for the control-side execution of the method according to one of Claims 5 to 12 having. Control unit for operating a motor vehicle having a transmission (2) comprising a plurality of shifting elements (9, 10, 11, 12, 13; A, B, C, D), wherein the control device operates a sailing mode of the control device as a function of at least one operating condition of the motor vehicle activated or enter into the same, and wherein the control unit subsequently deactivated depending on at least one operating condition of the motor vehicle sailing mode or from the same, characterized in that the control unit for entering the sailing mode from a currently engaged, traction-transmitting gear (V1, V2 , V3, V4, V5, V6, V7, V8) out one of the currently traction transmitting gear closed switching elements of the transmission (2) control side opens, so then in sailing mode a functional entry side, non-traction-transmitting sail passage (3_A, 4_B, 5_A, 6_A, 6_B, 8_A) is active, in which a switching element is less closed than in the respective zugkraftübert projecting gear, that the control unit in the Segelgängen (3_A, 5_A; 4_B, 6_B, 8_A) each selected closed control elements (B, C, D, E) on the control side such that in at least one of the leaflets (3_A, 5_A; 4_B, 6_B, 8_A), the transmission (2) on exiting the sailing mode starting switchable into at least three different traction-transmitting passages (V1, V3, V5, V4, V6, V8) from the current sail passage, the control device transmits the selected shift elements (B, C; D, E) in the sail flights (3_A, 4_B, 5_A, 6_A, 6_B, 8_A) should be closed, controls correspondingly in the sailing mode on the control side, and that the control unit selects the switching element (A, E, D, B, C, A) to be closed when leaving the sail mode and accordingly controls on the control side when exiting the sail mode. Control unit after Claim 15 , characterized in that the same means for control-side execution of the method according to Claim 4 or one of the Claims 6 to 11 having. Control unit for operating a motor vehicle having a transmission (2) comprising a plurality of shifting elements (9, 10, 11, 12, 13; A, B, C, D), wherein the control device depends on at least one operating condition of the motor vehicle Sailing mode of the control unit is activated or enters the same, and wherein the control unit subsequently deactivated depending on at least one operating condition of the motor vehicle sailing mode or from the same, characterized in that the control unit for entering the sailing mode of a currently engaged, traction transmitting gear ( V1, V2, V3, V4, V5, V6, V7, V8) out one of the currently traction transmitting gear closed switching elements of the transmission (2) control side opens, so then in sailing mode a functional entry side, non-traction-transmitting sail gear (1_A, 1_B , 2_A. 3_A, 3_B, 4_A, 4_B, 5_A, 6_A, 6_B, 7_A, 8_A) is active, in which a switching element is less closed than in the respective traction-transmitting gear (V1, V2, V3, V4, V5, V6, V7, V8), that the control unit selects the switching elements respectively closed in the sail courses on the control side in such a way that in several sail steps (1_A, 2_A; 3_ B, 6_A; 1_B, 3_A, 5_A; 4_B, 6_B, 8_A), the same switching elements (A, B, C, E, B, C, D, E) are closed and thereby several common sail courses (1_A, 2_A, 3_B, 6_A, 1_B, 3_A, 4_B, 6_B, 8_A), so that the gearbox, upon exiting from the sailing mode, starts from each of these common sail flights (1_A, 2_A; 3_B, 6_A; 1_B, 3_A; 4_B, 6_B, 8_A) into at least two different tractive power-transmitting passages (V1, V2; V3 , V6, V1, V3, V4, V6, V8), the control unit controls the selected switching elements (A, B, C, E, B, C, D, E) included in the sails (1_A, 2_A, 3_B , 6_A; 1_B, 3_A, 5_A; 4_B, 6_B, 8_A) should be closed, correspondingly activates in the sailing mode on the control side, and that the control device controls the switching element (C, E; B, D; A, E; B, C, A) , which is to be closed when leaving the sail mode, selected gear specific and accordingly controls the control side when exiting the sail mode. Control unit after Claim 17 , characterized in that the same means for control-side execution of the method according to Claim 4 or one of the Claims 6 to 11 having.

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