DE102008030238A1 - Gearbox, for a motor vehicle with a twin clutch transmission, has two gear sections with a coupling to couple and uncouple their drive shafts - Google Patents

Abstract

The gearbox, with a twin clutch transmission (3), has a gear section (4,5,15,16,18,19,21,23) with a drive shaft, a gear section (8,9,10,13,14,17,18,20,22) with a drive shaft (6) and an inner gear shift mechanism. A coupling (26) can couple the drive shafts together. The inner gear shift mechanism operates between one setting using a gear ratio in the first gear section with the coupling open and a setting where a selected gear ratio is used with the coupling closed.

Description

The The present invention relates to a manual transmission for a vehicle with double clutch, which in a first partial transmission with a first drive shaft and a second partial transmission with a second Drive shaft is articulated.

at Manual transmissions for Vehicles with a simple clutch, it is common, an inner circuit be interpreted in such a way that at any time they only require the insertion of a single gear and allowed before inserting a new gear possibly already inserted other gear automatically designed becomes. This is necessary because the simultaneous filing of two courses would be at one moving vehicle for destruction of the gearbox.

For motor vehicles with double clutch internal circuits are known, the simultaneous insertion a gang in a over a first part clutch of the double clutch driven partial transmission and another gear in the driven by the other part clutch Allow partial transmission, while making sure that in each Part gear only one gear is engaged at the same time. This allows a quick toggling between the two simultaneously engaged gears through each alternating opening and closing the first and second clutch, without any switching movement in the internal circuit would be required.

In a not previously published Patent application of the same applicant is described a manual transmission, in which the two drive shafts of two partial transmissions form-fitting together can be coupled in order to use both clutches simultaneously for starting to be able to. The advantage of this measure This is because the liberated when closing the clutch Frictional heat the startup significantly higher is as when closing a clutch during the ride, distributed to both partial clutches of the double clutch. So is the heat load each individual sub-clutch is reduced, or the number of startup operations, the possible per unit of time are, without overheating the clutch, is increased.

The Possibility, However, the two drive shafts rotatably coupling with each other is not readily with the conventional ones inner circuits compatible, each only the filing of a allow single gear in each partial transmission. Because a clutch for coupling the two drive shafts when gear is engaged both open and closed, it is not possible to do that Shut down the clutch inevitably to tie in the entry of a gangway. But the coupling can also not like an extra To handle gear, by a known locking mechanism automatically designed or opened as soon as another gear is engaged.

task of the present invention is one against simultaneous insertion Secured several courses Specify a large number of starting operations in tolerated for a short time.

The Task is solved by a manual transmission for a motor vehicle with dual clutch, which is a first partial transmission with a first drive shaft, a second partial transmission with a second drive shaft and an inner circuit, wherein at the first Partial transmission a first group of gears and the second partial transmission a second group of courses can be inserted and the inner circuit between a switching state, in which a gear of one of the partial transmission is engaged and all others Gears designed are, and a switching state is switchable, in which the one gear and another gear of the other sub-transmission is engaged, Further, a coupling for coupling the two drive shafts includes and the inner circuit between a switching state, in which inserted a predetermined gear of the first sub-transmission and the clutch is open, and a switching state is switchable, in which the predetermined gear engaged and closed the clutch is.

The inner circuit preferably comprises a switching shaft which between at least one position, in the shift finger of the shift shaft in the first partial transmission associated Schaltmäuler engage and the second Partial gear associated Schaltmäuler are free of shift fingers, and at least one position axially is displaceable, in the shift finger of the shift shaft in the second Partial gear associated Schaltmäuler engage and the first partial transmission associated Schaltmäuler free of shift fingers are. In this way it is ensured that one in a given axial position performed rotation of the switching shaft affects only one of the partial transmissions and both independently actuated are.

The Coupling is preferably over another displaceable by a shift finger of the shift shaft Controlled switching mouth.

one According to the first embodiment of the invention, the shift fingers arranged on the shift shaft so that in the shift mouth of the clutch only a shift finger engages when the first partial transmission associated Schaltmäuler are free of shift fingers. In other words, that's the clutch in terms of control assigned to second partial transmission.

Around an independent one To enable control of the clutch and the predetermined gear include the shift finger expediently at least one insertion finger, which is effective for closing the clutch, and at least one deployment finger operative to open the clutch is, and a predetermined gear associated switching jaw is at least then free of shift fingers when the one insert finger into the Shift jaw of the clutch engages. So the clutch can be independent of be closed to the specified gear.

the first partial transmission associated Schaltmäuler and the second partial transmission or the coupling associated Schaltmäuler are preferably in the axial Direction of the switching shaft arranged in pairs adjacent, so that a small axial displacement of the shift shaft is sufficient to a shift finger out of a shift mouth of the first sub-transmission and into a shift jaw engage the second sub-transmission or clutch and vice versa.

Under the same time in Schaltmäuler engaging shift fingers is preferably in any axial position the shift shaft exactly one insert finger, while all other deployment fingers are. This ensures that with every rotation of the stem only one gear is engaged or the clutch is closed can, while the delivery fingers in needed Number and arrangement are provided to ensure that in the Case of inserting a gear of a sub-transmission all other gears of the same Part gear or designed in the case of closing the clutch each gear which is incompatible with the closing of the clutch is.

Under the deployment fingers are preferably at least two, the on either side of the switching shaft in pairs opposite to an associated Shift mouth made in opposite directions deflected insertion positions to return to a central neutral position.

In a position of the switching shaft in which an insert finger in the Engages the shift jaw of the clutch to allow the clutch to close, should be at most a deployment finger intervene in the shift mouth of the given gear, so that not by closing the clutch automatically is interpreted.

Of the predetermined gear is preferably the lowest gear of the first Partial transmission.

Of others are preferably the aisles of the first set of odd-numbered passages and the corridors the second set even-numbered courses.

One reverse gear belongs preferably to the courses of the second sentence. But he can also himself the predetermined gear be.

Also when the reverse gear is not the predetermined gear, it is still preferable that the inner circuit has a switching state in which the reverse gear inserted and the clutch is closed, even when starting in reverse a distribution of frictional heat on to allow the two partial clutches of the double clutch.

In In this case, it is appropriate that in an axial position of the shift shaft, in which an insert finger in the shift mouth of the reverse gear engages, at most a deployment finger is in the shift jaw of the clutch to a Engage reverse gear without opening at the same time to enable the clutch.

Around cause a blockade of the gearbox when parked vehicle to be able to it is also desirable that the inner circuit has a switching state in which the Reverse gear and the first gear is engaged and the clutch is closed.

Further Features and advantages of the invention will become apparent from the following Description of exemplary embodiments with reference to the attached Characters. Show it:

1 a schematic representation of a dual clutch transmission;

2 a perspective view of a detail of the transmission 1 ;

3 a schematic partial view of the inner circuit of the transmission 1 seen along the axis of the shift shaft;

4 a perspective view of the switching shaft and Schaltmäulern with which the switching shaft cooperates, according to a first embodiment of the invention;

5 one too 1 analogous scheme of a second dual-clutch transmission;

6 a perspective view of a switching shaft according to a second embodiment of the invention;

7 a schematic section through the inner circuit according to the second embodiment with inserted first gear;

8th one to 6 analog cut at pickled second course;

9 one to 6 analog section with third gear engaged;

10 one to 6 analogue cut with fourth gear engaged;

11 one to 6 analogue cut with fifth gear engaged;

12 one to 6 analogue cut with sixth gear engaged;

13 one to 6 analogue cut with reverse gear engaged;

14 one to 6 analogue cut with first gear engaged and clutch engaged at the same time;

15 one to 6 analogue cut with engaged reverse gear and simultaneously closed clutch; and

16 one to 6 analogue cut with simultaneously engaged first and second gear and closed clutch.

1 is a schematic representation of a transmission for a motor vehicle with dual clutch, with two partial transmissions, each via a partial clutch of a friction double clutch 3 are driven. The gearbox has a first drive shaft 1 which extends axially over the entire width of the transmission and at one end with a disc 2 the double clutch 3 connected is. One from the disc 2 remote part of the drive shaft 1 carries gears 4 . 5 a first sub-transmission.

A hollow second drive shaft 6 extends around a central portion of the first drive shaft 1 and connects a second disc 7 the friction double clutch 3 with gears 8th . 9 . 10 a second sub-transmission.

There are two countershafts 11 . 12 , the gears 13 to 19 and dog clutches or lock synchronizers 20 to 23 for selectively coupling one of the gears 13 to 19 to his respective wave 11 . 12 wear. The countershafts 11 . 12 also carry two wheels 24 . 25 which mesh with a same, not shown, ring gear of a differential to transmit torque to the wheels of the motor vehicle.

In first gear, the lock synchronizer couples 23 the gear 19 to the wave 12 , and torque is transmitted through the split clutch 2 , the wave 1 and the gears 5 . 19 transfer. In second gear, the torque flow passes through the partial clutch 7 , the wave 6 , the gears 8th . 13 , the lock synchronizer 20 and the wave 12 of the second partial transmission. The third gear is again on the part of the clutch 2 , the wave 1 and then over the wheels 4 . 15 to the countershaft 11 , In fourth gear, the lock synchronizer couples 20 the gear 14 to the countershaft 11 , The fifth gear runs over the partial clutch 2 , the wave 1 , the wheels 4 and 18 and the lock synchronizer 23 to the countershaft 12 and the sixth gear via the partial clutch 7 , the wave 6 , the wheels 9 and 17 and the lock synchronizer 22 to the countershaft 12 ,

By the gear 19 simultaneously with the wheels 5 and 16 combs, is the gear 16 in the opposite direction to the other wheels 13 . 14 . 15 the countershaft 11 driven so that by coupling the gear 16 to the wave 11 by the Sperrsynchronisiereinrichtung 21 a reverse gear is engaged.

One on the drive shaft 1 arranged pin coupling 26 carries a plurality of pins 27 extending through openings of the gear 4 through in the direction of the gear 10 the hollow shaft 6 extend. The gear 10 is with a plurality of recesses 28 provided that are shaped around the pins 27 to record positively.

This structure is clearer in the perspective view of 2 shown the parts of the drive shafts 1 . 6 , the gears 4 . 10 and the pin coupling 26 shows. In the view of 2 a 90 ° sector is cut out of all these components to show the internal structure of the assembly. The pin coupling 26 has a disk-shaped main body 29 in which a circumferential groove 30 is formed for the engagement of a fork, not shown, on the axial displacement of the pin coupling 26 in an analogous manner to the displacement of the shift sleeve of a Sperrsynchronisiereinrichtung is controllable while the main body 29 together with the drive shaft 1 rotates. In the embodiment of 2 carries the main body 29 four spaced by 90 ° from each other pin 27 However, it is obvious that any other number of pins may be provided.

The gear 4 has a plurality of openings 32 in which the cones 27 are positively received, so that the pin coupling 26 practically without angular play with the drive shaft 1 rotates.

In the configuration of 2 lie recesses 28 of the gear 10 the openings 32 opposite, so if the pin coupling 26 with the help of the above-mentioned fork closer to the gear 4 is pushed, the tips of the pins 27 out of the gear 4 projecting and into the recesses 28 of the gear 10 engage, thereby providing a rigid rotational coupling between the two drive shafts 1 . 6 produce.

3 is a schematic partial view of an inner circuit, which in the motor vehicle transmission of 1 and 2 can be used. The reference number 41 denotes a shift sleeve of one of the lock synchronizers 20 - 23 that go along the axis 42 the wave 11 or 12 is displaceable. The sliding sleeve 41 can from her in the 3 shown neutral position in only one direction, for example in the direction of arrow P1, be slidable to couple a lying to his right idler gear to the shaft - so in the case of Sperrsynchronisiereinrichtung 22 , or it may optionally be displaceable in the direction of the arrow P1 and an arrow P2 in order to couple one of two idle wheels adjacent to the right and left to the shaft.

The shift of the shift sleeve 41 is powered by a shift fork 43 in a circumferential groove of the sliding sleeve 41 engages and rigidly to a shift mouth 44 is coupled by which perpendicular to the plane of 3 a shift shaft 45 extends. The shift shaft 45 passes through an opening 46 the switching mouth 44 in the form of a circle with two mutually opposite, substantially rectangular bulges 47 , In the neutral position, the circle is concentric with the axis of the selector shaft 45 ,

The shift shaft 45 comes with a variety of shift fingers, including an inlay finger 48 and several delivery fingers 49 , provided as in the perspective view of 4 to recognize more clearly. The length of the delivery fingers 48 is chosen so that this in the circular area of the opening 46 are freely rotatable when the shift jaw 44 is in the neutral position. The insert finger 48 is longer than the delivery fingers 49 so he hits the sides of one of the bulges 47 can strike and shift the shift mouth from the neutral position to the side.

The shift fingers 48 . 49 wearing rings 50 are uniform in the axial direction on the switching shaft 45 distributed. Four of the rings 50 each carry two diametrically opposed deployment fingers 49 while inserting finger 48 alone on a ring 50 is provided. The distance between the rings 50 is twice as large as that between a plurality of mischiefs 44 , in the 4 For the sake of clarity of the presentation because of separate from the shift shaft 45 are shown, but in the assembled transmission, the shift shaft 45 surround.

From the in 4 With 44-1 to 44-5 designated Schaltmäulern controls the switching mouth 44-1 the coupling 26 . 44-2 controls the shift sleeve of the Sperrsynchronisiereinrichtung 23 ; the switching mouth 44-3 controls the shift sleeve of the Sperrsynchronisiereinrichtung 20 , the shiftmouth 44-4 controls the shift sleeve of the Sperrsynchronisiereinrichtung 21 , and the shift mouth 44-5 controls the shift sleeve of the Sperrsynchronisiereinrichtung 22 ,

When the shift shaft 45 in an axial position, in which the insertion finger 48 in the switching mouth 44-1 engages, are simultaneously delivery fingers 49 in the switchmouths 44-3 and 44-5 , If one of these shifters 44-3 . 44-5 is deflected from the neutral position, then performs a rotation of the shift shaft 45 in which the insert finger 48 against the lateral edge of a bulge 47 the switching mouth 44-1 pushes, in addition to that in the deflected Schaltmäu learning a deployment finger 49 against the edge of the bulge 47 encounters. The same rotation that the shift mouth 44-1 deflects to the side, thus brings before the deflected Schaltmäuler 44-3 . 44-5 back to the neutral position. A possibly engaged even-numbered gear becomes so before the clutch is closed 26 designed.

The shifters 44-2 . 44-4 that by the full wave 1 driven gears 15 . 16 . 18 . 19 Steer, remain unaffected, leaving a concurrent first gear while closing the clutch 26 remains inserted. So it is possible the two waves 1 . 6 lock together without laying the first gear.

On the other hand, is the insertion finger 48 in the amount of the Sperrsynchronisiereinrichtung 23 controlling Schaltmauls 44-2 so that it depends on the direction of rotation of the stem 45 can insert the first or fifth gear, then there are deployment fingers 49 at the same time in the amount of the switching mouth 44-4 , so that this one possibly at the Sperrsynchronisiereinrichtung 21 inserted third gear or reverse gear interprets.

In an analogous manner leads at the level of the switching mouth 44-3 placed insert finger 48 a rotation of the switching shaft 45 for returning the Schaltmäuler 44-1 . 44-5 in the neutral position while the shifters 44-2 . 44-4 remain unaffected. That is, when the second gear or the fourth gear is engaged, at the same time every other possibly even-numbered gear is designed and the clutch 26 open.

When the insert finger 48 at the level of the switching mouth 44-4 is placed, can by rotation of the switching shaft 45 the reverse gear are engaged. At the same time, the rotation forces the switching mouth 44-2 in neutral position, so that at the same time no odd gear can be engaged. At the same time the switching mouth 44-1 is free from shift fingers, the state of the clutch remains 26 unchanged. The reverse gear can thus both open and closed clutch 26 be inserted. By successively adjusting the Sperrsynchronisiereinrichtungen 21 . 23 can - with open as well as with closed clutch 26 - are switched back and forth between first gear and reverse gear.

5 indicates one 1 analogous scheme of a second dual-clutch transmission. It is different from the one of the 1 in that the reverse gear 16 to Sperrsynchronisiereinrichtung 22 at the countershaft 12 offset and a step wheel 54 which is driven by the wheel 8th the hollow shaft 6 combs.

6 shows a switching shaft 45 attached to the manual transmission of the 5 can be used. The shift fingers 48 . 49 are here in three groups 51 . 52 . 53 arranged, each of which has an insertion finger 48 and several delivery fingers 49 includes. The middle group 52 controls the switching mouth 44-1 the clutch 26 while the two outer groups 51 . 52 the switchmouths 44-1 to 44-4 the lock synchronizers 20 to 23 assigned. At the switching groups 51 . 53 is the axial distance between the fingers 48 . 49 twice as large as between adjacent Schaltmäulern, so that in any axial position of the shift shaft 45 the shift fingers of these groups 51 . 53 either only in the Schaltmäuler the odd-numbered gears associated Sperrsynchronisiereinrichtungen 21 . 23 or only in the of the even-numbered gears and the reverse gear associated Sperrsynchronisiereinrichtungen 20 . 22 intervention. In the middle switching group 52 the axial staggering of the fingers is denser, so that in each axial position of the stem 45 at least one finger 48 or 49 in the switching mouth 44-1 intervenes. There is both a position in which two delivery fingers 49 in the switching mouth 44-1 engage so that every turn of the stem 45 the coupling 26 opens, including positions in which only a deployment finger 49 engages, so that a rotation of the switching shaft 45 in one direction the switching mouth 44-1 in the deflected state and the clutch 26 closed, while a rotation in the opposite direction, the shift mouth 44-1 pushes back to the neutral position and the clutch 26 opens.

In the amount of the lowest delivery fingers 49 is an example of a switching mouth 44 shown. It is in the neutral position and this can due to the inclination of the deployment fingers 49 also not left. A corresponding switching mouth at the level of one of the insertion fingers 48 would be deflected by this from the neutral position to the left. The selector shaft is rotatable about a neutral position, in which to direct the insertion fingers on the viewer in a mirror-blind position in which the deployment fingers deflect a shift mouth to the right.

In order to allow a more detailed understanding of the operation of the internal circuit according to the second embodiment, configurations of the internal circuit in different gears in the 7 to 14 shown in detail. The figures each show a side view of the switching shaft 6 in conjunction with sections of the Schaltmäuler controlled by them 44-1 to 44-5 along the in 6 indicated by a dotted line level.

In an idle state (not shown) are all Schaltmäuler 44-1 to 44-5 in a flight. To engage the first gear, the shift shaft 45 in 7 axially shifted so that the insertion finger 48 the group 53 in the switching mouth 44-2 intervenes. The insert finger 48 is turned from the neutral position to the left and has the switching mouth 44-2 pushed to the left from the escape of the other Schaltmäuler out. The shifters 44-3 . 44-5 are free of shift fingers 48 . 49 ; in the switching mouth 44-4 grab two delivery fingers 49 a, so that this can only take the neutral position. In the switching mouth 44-1 grab a single, the insert finger 48 the group 52 diametrically opposite delivery finger 49 one that prevents it from taking a left-leaning position.

To engage the second gear, the shift shaft 45 turned back to its neutral position and then shifted axially one step down, as in 8th shown so that the insertion finger 48 the group 53 in the switching mouth 44-4 intervenes. By a corresponding rotation of the switching shaft 45 is the switching mouth 44-3 deflected to the left, leaving the lock-synchronizer 20 the gear 13 to the wave 11 coupled. At the same time grab two delivery fingers 48 into the shifters 44-1 . 44-5 a, so that they can only take the neutral position, so that no other even-numbered gear can be engaged and the clutch 26 is open. In the shifters 44-2 . 44-4 At the same time, no finger picks up, so that at the same time an odd-numbered gear can be engaged.

To engage the third gear, the shift shaft 45 as in 9 shown moved upwards until the insert finger 48 the group 51 in the switching mouth 44 engages, and the shaft is rotated to the shift jaw 44-4 to deflect to the right. At the same time force two delivery fingers 49 the group 53 the switching mouth 44-2 in neutral, so that no other odd-numbered gear can be engaged. In the shifters 44-3 . 44-5 at the same time, does not pick up a finger, so at the same time a even-numbered gear can be engaged.

In the fourth course of the 10 is the shift shaft 45 in turn shifted one step up, so that the insert finger 48 the group 51 in the switching mouth 44-5 located, and the shift shaft 45 is turned to the shift mouth 44-5 to deflect to the left. A closing of the clutch 26 is by a single in the switching mouth 44-1 engaging delivery finger 49 locked out; the switching mouth 44-3 is by two delivery fingers 49 forced into neutral position. In the shifters 44-2 . 44-4 At the same time, no finger picks up, so that at the same time an odd-numbered gear can be engaged.

To engage the fifth gear, the shift shaft 45 pushed down five steps, as in 11 shown so that the insertion finger 48 the group 53 in the switching mouth 44-2 engages, and the shift shaft 45 is turned to the sliding sleeve 44-2 to deflect to the right. Two at the same time in the switching mouth 44-4 engaging deployment fingers force this into the neutral position. A single delivery finger 49 who is in the shift mouth 44-1 engages, prevents the clutch from closing 26 ,

To engage the sixth gear, the shift shaft 45 moved down another step and rotated, as in 12 shown so that the insertion finger 48 the switching group 53 the switching mouth 44-3 moves to the right. Again, the shivers are 44-2 . 44-4 free from extension fingers and can therefore maintain a previously set position. The shifters 44-1 . 44-5 are fixed in a neutral position by two engaging deployment fingers.

To go from first gear to reverse gear 13 to switch, the shift shaft must 45 be raised by three steps, so that the insertion finger 48 the group 51 in the switching mouth 44-5 intervenes. Then the shift shaft 45 turned to the shift mouth 44-5 to deflect to the right. One at the same time in the switching mouth 44-1 engaging delivery finger 49 points in the same direction as the insert finger 48 so that the shift mouth 44-1 both the illustrated neutral position and that of the closed clutch 26 can take appropriate, deflected to the right position. Two intervening extension fingers force the switching mouth 44-3 in the neutral position while the shifters 44-2 . 44-4 are free of shift fingers.

14 shows the configuration of the inner circuit with engaged first gear and clutch closed 26 , To achieve this configuration, for example, the shift shaft from the in 7 shown configuration with engaged first gear and open clutch 26 move up one step to the insertion finger 48 the group 52 in the switching mouth 44-1 to position, and then by a rotation of the shift shaft, the shift jaw 44-1 moved to the right. Because at the same time corresponding to the odd gears Schaltmäuler 44-2 . 44-4 of shift fingers are free, by closing the clutch 26 the first gear not designed. The Schaltmäuler corresponding to the even-numbered gears 44-3 . 44-5 however, in the configuration of the 14 two delivery fingers each 49 and therefore can only assume the neutral position.

From the configuration of 14 out it is possible without opening the clutch 26 to switch to reverse. For this purpose, the shift shaft must first be moved up one step to a pair of deployment fingers 49 in the switching mouth 44-2 to place and the shift shaft 45 be turned to the shift mouth 44-2 to return to the neutral position. Because at the same time only a delivery finger 49 in the switching mouth 44-1 engages, the direction of rotation of the shaft can be chosen so that the shift mouth 44-1 is not moved. (A turn in the opposite direction would be the shift mouth 44-1 return to the neutral position and the clutch 26 to open). Subsequently, the shift shaft by a further step on the in 15 raised level shown, and then by rotation of the shift shaft 45 the reverse gear assigned switching mouth 44-5 moved to the right. Also in this position, only a deployment finger engages 49 in the switching mouth 44-1 one. This points in the same direction as the insert finger 48 in the switching mouth 44-5 , so that the right-deflected position of the shift mouth 44-1 get and the clutch 26 remains closed.

It is also possible from the configuration of 14 out the selector shaft 45 directly to raise and turn two steps. In this case, both deflected Schaltmäuler remain 44-1 the clutch 26 and 44-2 the first gear in their position, and in addition, the shift mouth 44-5 the reverse gear deflected. By so first gear and reverse engaged simultaneously and the waves 1 and 6 coupled to each other, a park state can be made, in which the transmission is blocked.

1

drive shaft

2

disc

3

Double coupling

4

gear

5

gear

6

drive shaft

7

disc

8th

gear

9

gear

10

gear

11

Countershaft

12

Countershaft

13

gear

14

gear

15

gear

16

gear

17

gear

18

gear

19

gear

20

Sperrsynchronisiereinrichtung

21

Sperrsynchronisiereinrichtung

22

Sperrsynchronisiereinrichtung

23

Sperrsynchronisiereinrichtung

24

gear

25

gear

26

pin coupling

27

spigot

28

recess

29

main body

30

groove

32

opening

41

shift sleeve

42

axis

43

shift fork

44

shift mouthpiece

45

shift shaft

46

opening

47

bulge

48

insert fingers

49

Auslegefinger

50

ring

51

group

52

group

53

group

54

step gear

Claims (15)

Manual transmission for a motor vehicle with double clutch ( 3 ), wherein the manual transmission, a first partial transmission ( 1 . 4 . 5 . 15 . 16 . 18 . 19 . 21 . 23 ) with a first drive shaft ( 1 ) and a second partial transmission ( 6 . 8th . 9 . 10 . 13 . 14 . 17 . 18 . 20 . 22 ) with a second drive shaft ( 6 ) and an inner circuit ( 41 - 53 ), wherein the first partial transmission, a first group of gears and the second partial transmission, a second group of gears is inserted, and the inner circuit ( 41 - 53 ) between a switching state in which a gear of one of the partial transmission is engaged and all other gears are designed, and a switching state is switchable, in which a gear and another gear of the other sub-transmission is engaged, characterized in that the transmission is a clutch ( 26 ) for coupling the two drive shafts ( 1 . 6 ) and that the inner circuit ( 41 - 53 ) between a switching state in which a predetermined gear of the first partial transmission is engaged and the clutch ( 26 ) is open, and a switching state is switchable, in which the predetermined gear is engaged and the clutch ( 26 ) closed is. Gearbox according to claim 1, characterized in that the inner circuit ( 41 - 53 ) a shift shaft ( 45 ) between at least one position, in the shift finger ( 48 . 49 ) of the switching shaft ( 45 ) in the first partial transmission associated Schaltmäuler ( 44-2 . 44-4 ) engage and the second partial transmission associated Schaltmäuler ( 44-3 . 44-5 ) free of shift fingers ( 48 . 49 ), and at least one position is axially displaceable, in the shift finger ( 48 . 49 ) of the switching shaft ( 45 ) in the second partial transmission associated Schaltmäuler ( 44-3 . 44-5 ) engage and the first partial transmission associated Schaltmäuler ( 44-2 . 44-4 ) free of shift fingers ( 48 . 49 ) are. Gearbox according to claim 2, characterized in that the clutch ( 26 ) over another by a shift finger ( 48 . 49 ) of the switching shaft ( 45 ) movable shift jaw ( 44-1 ) is controlled. Gearbox according to claim 3, characterized in that in the shift mouth ( 44-1 ) of the coupling ( 26 ) only a shift finger ( 48 . 49 ) engages when the first partial transmission associated Schaltmäuler ( 44-2 . 44-4 ) free of shift fingers ( 48 . 49 ) are. Gearbox according to claim 3, characterized in that the shift fingers ( 48 . 49 ) at least one insert finger ( 48 ), which closes the clutch ( 26 ) is effective, and at least one deployment finger ( 49 ), which is used to open the clutch ( 26 ) is effective, and that one of the predetermined gear associated switching jaw ( 44-2 ) at least free of shift fingers ( 48 . 49 ), when the one insert finger ( 48 ) in the switching mouth ( 44-1 ) of the coupling ( 26 ) intervenes. Manual transmission according to one of claims 3 to 5, characterized in that the first partial transmission associated Schaltmäuler ( 44-2 . 44-4 ) and the second partial transmission or the clutch ( 26 ) associated Schaltmäuler ( 44-1 . 44-3 . 44-5 ) in the axial direction of the switching shaft ( 45 ) are arranged in pairs adjacent. Manual transmission according to one of claims 2 to 6, characterized in that at the same time in Schaltmäuler ( 44 ) engaging shift fingers ( 48 . 49 ) always exactly one insert finger ( 48 ) and that all other deployment fingers ( 49 ) are. Gearbox according to claim 7, characterized in that under the Auslegefingern ( 49 ) are at least two, on both sides of the switch wave ( 45 ) lie in pairs opposite. Gearbox according to claim 7 or 8, characterized in that in a position of the switching shaft in which an insert finger ( 48 ) in the switching mouth ( 44-1 ) of the coupling ( 26 ), at most one delivery finger ( 49 ) in the switching mouth ( 44-2 ) of the predetermined gear engages. Gearbox according to one of the preceding claims, characterized characterized in that the predetermined gear is the lowest gear of the first sub-transmission is. Gearbox according to one of the preceding claims, characterized characterized in that the aisles of the first movement odd numbered passages and the passages of the second set are even-numbered courses. Gearbox according to one of the preceding claims, characterized characterized in that the aisles of the second set comprise a reverse gear. Gearbox according to one of claims 1 to 11, characterized in that the predetermined gear is a reverse gear is. Gearbox according to claim 12, characterized in that that the inner circuit has a switching state in which the Reverse engaged and the clutch is closed. Gearbox according to claim 12 or 14, characterized characterized in that the inner circuit has a switching state, in which the reverse gear and the first gear is engaged and the clutch is closed.