WO2010057757A1 - Device for detecting all shifting positions in a manual transmission - Google Patents

Abstract

The invention relates to a device (1) for detecting all shifting positions in a manual transmission. A shift tower (3) accommodates a moving control element (2), through which the individual shifting positions (R, N, 40) in the manual transmission can be set. At least one target (24, 26) provided with a code is associated with the moving control element (2). Furthermore, at least one address bus sensor (20) is provided for determining the position of the moving control element (2) based on the at least one target (24, 26) provided with the code.

Description

 Name of the invention

Device for detecting all switching positions in a

manual transmission

description

Field of the invention

The invention relates to a device for detecting all switching positions in a manual transmission. For this purpose, the transmission comprises a switching dome, which receives a movable actuator. About the actuator, the individual switching positions in the transmission are adjustable.

Background of the invention

German patent application DE 10 2006 036 696 A1 discloses a sensor arrangement. The sensor arrangement is used to determine positions of at least one transmission component. The sensor arrangement has at least one sensor and a sensing pin which is mounted in a housing in a readily movable manner. The sensing pin cooperates with a ramp or a trajectory. A sensor determines the position of the scanning pin and determines the switching position.

The German patent DE 195 81 769 C1 discloses a ramp contour for a locking device. The locking device serves to fix the position of a movable circuit or actuating element. In particular, this locking device is used for a shift of a transmission. At least one locking bolt is displaceably guided, which has a detent ball on one end face. The locking pin is biased by a compression spring. Due to this pressure spring, the locking bolt is provided against a scanning curve. spans and the detent ball thus slides on this Abtastkurve. The Rannpenkontur is designed such that the contact point coincides with a turning point of the symmetrically connected ramp contour.

The German patent DE 41 21 410 C1 discloses a device for detecting the switching state of a transmission. The transmission is designed as an electric transmission for a motor vehicle in which a part which is moved directly in the transmission during shifting, namely the shift shaft, is used as an indicator for the switching state. For this purpose, a finger is fastened on the switching shaft, which influences the fields of permanent magnets by means of a shadow mask, which act on opposite reed switches. The permanent magnets, the reed switches, their support plates and the shadow mask is combined to form a sensor unit and can be mounted together on an opening of the wall of the transmission.

The German utility model DE 200 106 19 LJ 1 discloses a switching device for a vehicle gearbox. The vehicle change gear comprises a manual shift lever forcibly guided in accordance with selection and switching movements and one electric actuating device assigned to the selection or shift movements. Further, a controller is provided, which is in operative connection with the manual shift lever and the two actuating devices, wherein the two actuating devices are designed as separate units. The switch positions of the manual shift lever are electrically coded. The two actuating devices can be controlled by means of the control in accordance with the switching positions of the manual shift lever.

German patent application DE 199 080 36 A1 discloses a method and a device for detecting the rotational and translational movement of a shaft. The shaft is provided with at least one permanent magnet. In the vicinity of the shaft, a linear inductive non-contact displacement sensor is arranged, which is controlled by the permanent magnet. The shaft can thereby execute several linear sections in the axial direction. have formed, each linear section is associated with a permanent magnet. The permanent magnet is fastened on the outside of the shaft. Furthermore, the permanent magnets are arranged radially offset from each other.

So far, a reversing light switch has been used to indicate the reverse gear in the rule. The indication of the neutral position of a transmission is usually made via a magnet and a Hall sensor. The disadvantage of this arrangement is that you need two circles to determine two different positions of the transmission of a motor vehicle. Furthermore, with this arrangement, no gear detection is possible. Likewise, this arrangement does not allow to detect a detection of the intermediate positions in the individual shift gates.

The invention has for its object to provide a device that allows, in addition to the current requirements, such as the detection of the reverse gear and the neutral position, to detect the intermediate stages and the end positions of a gearbox.

The above object is achieved by a device comprising the features of claim 1. In particular, the device of the present invention is provided with at least one code located on a predefined target. This target is associated with a movable actuator. Furthermore, at least one address bus sensor for determining the position of the movable control element is provided, the position of the movable control element is determined on the basis of the at least one coded target.

The address bus sensor can also be used for address activation of the at least one target. In one embodiment of the invention, the address bus sensor is used to read the code of the target. In addition to the address bus sensor, an address activation sensor is arranged in the switching dome. The at least one target can be designed as an incremental object, so that a relative position of the movable actuating element takes place via evaluation electronics. This evaluation unit counts the overflows of the incremental object, which are carried out by the address bus sensor.

According to the device according to the invention, a path or an angle traveled by the movable actuating element is determined from the counting of a first threshold and a second threshold. The first thresholds are aligned perpendicular to the second threshold.

In another embodiment, the at least one target may have an encoded surface (e.g., encoded magnetic tape / encoded magnetic paint). A determination of an absolute position of the movable actuating element takes place directly via the coded target.

The movable actuator is movable in the direction of the axis of the actuating element and about the axis of the actuating element. With the present invention, it is thus possible to detect both the shift position of the reverse gear and the neutral positions in a manual transmission. In addition, it is possible with the present invention to detect the intermediate stages in shifting a manual transmission and also the end positions into which the operating lever of a manual transmission is placed. The detection of switching and / or selection positions is based on coded targets. According to one embodiment, the target is designed as an incremental object. Here one counts the overflow of sleepers, from which the path or angle results, which the control element has covered when shifting the transmission. If the target is designed as an address bus and control bus, it is thus also possible to accurately determine the positions without additional effort after a power failure.

In the following, the embodiments are intended to explain the invention and its advantages with reference to the accompanying figures. Figure 1 shows a perspective view of an apparatus for adjusting various gears in a transmission of a motor vehicle.

Figure 2 shows an enlarged perspective view of the device for adjusting the various gears in the transmission of a motor vehicle, wherein the switching dome is shown enlarged and some parts of the housing have been omitted.

Figure 3 shows an enlarged perspective view of another

Embodiment of the switching dome, here also parts of the housing have been omitted for the sake of clarity.

FIG. 4 shows an enlarged perspective illustration of the region of the device in which the sensors for determining the switching position are arranged.

Figure 5 shows another perspective view of the arrangement of the sensors with respect to the targets, which are used to determine the switching position of the transmission.

Figure 6 shows a further enlarged perspective view of

Arrangement of the sensors with respect to the targets, which are used to determine the switching position of the transmission.

FIG. 7 shows a schematic representation, as in a 6-speed

Gearbox with reverse gear the individual thresholds are divided to achieve a determination of the individual shift positions of the transmission.

Figure 8 shows a schematic representation of the position detection in a 6-speed transmission by means of 11 switches or buttons. Figure 9 shows a schematic representation of the position detection in a 6-speed transmission by means of 21 switches or buttons.

FIG. 10 shows a circuit diagram of a 6-speed transmission.

Figure 11 shows schematically the detection of the switching positions of a

6-speed transmission by means of an address coding at 21 positions of the 6-speed transmission.

For identical or equivalent elements of the invention, identical reference numerals are used. Furthermore, for the sake of clarity, only reference symbols which are required for the description of the respective figure are shown in the individual figures. The illustrated embodiments are only examples of how the device according to the invention can be equipped. But they do not represent a final limitation of the invention.

FIG. 1 shows a perspective view of a device for detecting all shift positions in a manual transmission of a motor vehicle. The switching states of the transmission of the motor vehicle are adjusted by means of a movable control element 2. The movable actuator 2 is here a shaft which acts as a central transformer of the individual switching movements. The device 1 has a switching dome, which receives the actuating element and is at least partially surrounded by a housing 4. In the embodiment shown in FIG. 1, two detents are installed in the housing 4. The arrangement of the detents 6 in the housing 4 represents only one of several embodiments and thus should not be construed as a limitation of the invention. These two locks 6 serve for a defined shift feeling when changing gears. Further, contours 15 are formed on the adjusting element 2, on which the detents 6 roll and are also fixed in a specific position. The various embodiments for detecting the switching states of the movable circuit or actuator 2 will be described in more detail in the following figures. As explained with reference to the object of the invention, it applies in addition to the usual shift positions such as reverse R and neutral position N to detect the intermediate positions and the end positions of a gearbox reliably. The shift dome is provided with an actuating lever 12, via which the various positions or positions of the actuating element 2 can be adjusted.

Figure 2 shows an enlarged perspective view of the device 1 for setting or for detecting the switching positions of a transmission of a motor vehicle. In the switching dome 3, at least one address bus sensor 20 is arranged. In the embodiment shown in FIG. 2, an address activation sensor 22 is provided in relation to the address bus sensor 20. Likewise, a lock 6 is provided in the shift dome, which, as already mentioned, ensures a defined shift feel when changing gears.

Figure 3 shows an enlarged view of the switching dome 3, wherein the sake of clarity, the housing 4 has been removed. Opposite the address bus sensor 20, the address activation sensor 22 is arranged. The lock 6 cooperates with a contour 15 in order to provide a defined shift feeling for the gear change. The individual shift positions of the transmission are determined at least via the address bus sensor 20 in conjunction with at least one coded target 24, 26. The address activation sensor also cooperates with the target 24, 26 in order to enable the coding of the target 24, 26 required for the readout of the individual shift positions of a transmission.

FIG. 4 shows a further perspective illustration of an embodiment of the arrangement of detent 6 and address bus sensor 20 in the switching dome 3 of the device 1. The address bus sensor 20 is designed here such that it is both the address bus sensor and the address activation sensor.

FIG. 5 shows a further perspective illustration of the embodiment of the arrangement of locking device 6 and address bus sensor 20 shown in FIG. 4. As already mentioned several times, the locking device 6 acts with a contour 15. together to provide for the operation of the individual gears of the transmission a certain shift feel available. The address bus sensor 20, which also acts as an address activation sensor, cooperates with a coded target 24 to determine the various switching positions therefrom.

FIG. 6 shows an enlarged representation of the embodiment of the arrangement of address bus sensor 20 and address activation sensor 22 shown in FIGS. 2 and 3. As already described in FIG. 2, the address bus sensor 20 and the address activation sensor 22 are arranged opposite one another. The address bus sensor 20 interacts with at least one coded target 24 in order to determine therefrom the set positions of a transmission of a motor vehicle. Further, the address activation sensor 22 also cooperates with another target 26 to set a specific encoding on the target 26.

7 shows a schematic representation of the distribution of first activation thresholds 34 and second activation thresholds 36 for the detection of the individual shift positions in a 6-speed transmission 30. The term "shift positions" means the reverse gear R, all end positions 40 for the forward gears, to understand all neutral positions N and also intermediate positions Z in the gearshift of a transmission.The 6-speed transmission 30 has a plurality of shift lanes 32 which lead to the individual end positions 40 of the individual gears.One of the shift lanes 32 leads to the reverse gear R and between the In order to achieve a detection of the individual switching positions, a plurality of first activation thresholds 34 are inserted, which run perpendicular to the individual switching gates 32. For detecting the selection position, a plurality of second activation thresholds 36 are likewise inserted, which p run parallel to the individual shift gates 32. The position determination of the switching position and the selection position is carried out by means of evaluation electronics 41, so that, for the detection of the absolute position in the circuit 30, ultimately a grid of mutually perpendicular first activation thresholds 34 and second activation thresholds 36 results. The position determination takes place by counting overflows registered by the address bus sensor 20. The determination of the relative position by means of a Increment- talen counter, the z. B. may be formed as a magnetic tape. The detection of the absolute position can be done with a coded surface such as magnetic tape or magnetic paint. The position determination is then obtained directly via coded targets 24, which are arranged at the respective positions within the circuit 30 of the transmission.

Figure 8 shows a schematic representation of an embodiment for detecting the position in a 6-speed transmission 30. Here, eleven switches or buttons 40 are distributed on the 6-speed transmission 30, via which the position detection is performed in the transmission 30. Thus, a switch 40 is provided for the reverse gear R. Likewise, the transmission 30 comprises four neutral positions N, to which a switch 40 is also assigned. Likewise, all end positions, which represent the forward gears 1 to 6, also have a switch 40. These switches, it is possible to determine the shift position in the transmission accurately.

FIG. 9 shows a further embodiment for determining all shift positions in a 6-speed transmission 30. Here, 21 switches 40 are provided, in which the shift positions within a transmission can be detected. Again, the reverse gear R is provided with a switch 40. Furthermore, all four neutral positions N of the transmission are provided with a switch 40. Likewise, each end position of the circuit 30, that is to say the first gear, the second gear, the third gear, the fourth gear, the fifth gear and the sixth gear, is likewise assigned a switch 40. Likewise, a switch 40 is provided at an intermediate position Z between each end position and the neutral position within a shift gate 32. Thus, it is not only possible to detect the end positions, but also intermediate positions Z when shifting a transmission. Figure 10 shows a schematic representation of a 6-speed transmission 30. The 6-speed transmission 30 includes four neutral positions S and one reverse R. Also, the gears 1 to 6 are set via shift gates 32.

Figure 11 shows a further embodiment of the invention, wherein the individual shift positions are detected within the transmission 30 of a motor vehicle by means of an address coding. Here too, 21 positions are assigned a corresponding address coding 50 within the switching paths or the switching gates. Each address coding 50 comprises six bits. In the embodiment illustrated in FIG. 9, in which switches or buttons are used for the position detection 21, these switches or buttons of the address activation sensor 22 are activated accordingly, so that the address coding shown in FIG. 11 is possible.

Claims

claims Anspruch [en] A device (1) for detecting all shift positions in a manual transmission comprising a shift dome (3) which is a movable one Actuator (2) receives, over which the individual shift positions (R, N, 40) are adjustable in the transmission, characterized in that the movable control element (2) is assigned at least one provided with a code target (24, 26) and that at least one address bus sensor (20) is provided for determining the position of the movable control element (2) on the basis of the target (24, 26) provided with at least the code. 2. Device (1) according to claim 1, characterized in that the address bus sensor (20) also carries out the address activation of the at least one target (24, 26). 3. Device (1) according to claim 1, characterized in that the address bus sensor (20) for reading the code of the target (24, 26) is provided and that in addition thereto, an address activation sensor (22) in the switching dome (3) is arranged. 4. Device according to one of claims 1 to 3, characterized in that the at least one Taget (22) is an incremental object, so that a relative position of the movable actuating element (2) via an evaluation (39) takes place, the overflows of activation thresholds (34 , 36) of the incremental object counts. 5. Apparatus according to claim 4, characterized in that a path or an angle, the movable actuator (2) covers, from the count of the first activation thresholds (34) and the second activation thresholds (36), wherein the first activation thresholds (34) are aligned perpendicular to the second activation thresholds (36). 6. Device according to one of claims 1 to 3, characterized in that the at least one target (22) is a coded magnetic tape, wherein an absolute position of the movable actuating element (2) takes place directly over the coded targets. 7. Device according to one of claims 1 to 6, characterized in that the movable adjusting element (2) in the direction of the axis (A) of the adjusting element (2) and about the axis (A) of the adjusting element (2) is movable.