DE102018121319A1 - Method for teaching a sensor system - Google Patents

Abstract

The invention relates to a method for teaching a sensor system (10), in which the sensor system (10) can read out a selectable switching state of a transmission (12) in a vehicle and comprises a first sensor (14) that has a first characteristic value in relation to the Switching state determined and comprises a second sensor (16) which determines a second characteristic value in relation to the switching state, wherein a first tolerance range (26) for the first characteristic value and a second tolerance range (28) for the second characteristic value corresponds to a first switching state and one A check is carried out to determine whether the first characteristic value lies within the first tolerance range (26) and the second characteristic value lies within the second tolerance range (28) and, if both are present, an output is made on the presence of the first switching state.

Description

The invention relates to a method for teaching a sensor system according to claim 1.

For example, teaching a gearbox is off DE 2005 000 888 A1 known. For this purpose, parameters of a gearbox actuator system and a clutch actuator system are taught, whereby the teaching takes place on a test bench from the final assembly of the gearbox with the clutch attached.

When using a clutch that is controlled by an EKM, a sensor system is usually used that can read out a shift request and a gear selection that is carried out by the driver. Depending on this, the clutch control operates the clutch. A clutch pedal is unnecessary and the clutch is actuated by a clutch actuator that is operated electrically, hydraulically or electrohydraulically. This requires knowledge of the shift request and the gear selected.

However, the detection of these two parameters by a sensor system has tolerances that make it difficult to know the gear selected exactly. For this reason, it is necessary to learn the sensor system before commissioning in order to be able to draw precise conclusions about the selected gear in later operation.

The teaching is usually carried out by a user during manufacture or at the end of manufacture. For this purpose, during the teach-in process, the user engages the respective gears one after the other by actuating the gear shift device. If the gearshift device is in the respective position without force, that is to say without external forces, a teaching process is carried out, by means of which the positions of the sensors used in the sensor system, which positions correspond to the selected gear, are determined. These positions of the sensors are stored in a vehicle control device and can be called up later in the operation of the vehicle and thus also the gear assigned to these positions.

However, the gear engaged by the user, on the basis of which the teaching of the sensor system and the detection of the positions of the sensors of the sensor system take place, is not checked during the teaching process.

The object of the present invention is to improve a method for teaching a sensor system.

At least one of these tasks is solved by a method for teaching a sensor system with the features according to claim 1. Accordingly, a method for teaching a sensor system is proposed, in which a sensor system can read out a selectable switching state of a transmission in a vehicle and comprises a first sensor that determines a first characteristic value in relation to the switching state and includes a second sensor that has a second characteristic value determined in relation to the switching state, a first tolerance range for the first characteristic value and a second tolerance range for the second characteristic value corresponding to a first switching state and a check is carried out to determine whether the first characteristic value lies within the first tolerance range and the second characteristic value lies within the second tolerance range and if both are given, there is an output about the presence of the first switching state.

As a result, the method for teaching a sensor system can be improved and the safety and reliability of the method for teaching can be increased. Errors by the user performing the teaching process can be reduced or even avoided.

Provision can be made to use further sensors, each of which detects further characteristic values and which in turn are assigned further tolerance ranges which characterize the individual switching states.

In a preferred embodiment of the invention, the gearshift state is a gear position, in particular including a neutral position, a gearshift device and the first gearshift state corresponds to a first gear of the gearshift device.

In a further preferred embodiment of the invention, a third tolerance range for the first characteristic value and a fourth tolerance range for the second characteristic value correspond to a second switching state. A check is carried out to determine whether the first characteristic value lies within the third tolerance range and the second characteristic value lies within the fourth tolerance range, and if both are given, an output is made on the presence of the second switching state.

There may be further tolerance ranges for the first and second characteristic values, each of which corresponds to further switching states. The check can include these further tolerance ranges in the query to determine the respective switching state.

In an advantageous embodiment of the invention, the first and second Tolerance range spanned a first tolerance sector and a second tolerance sector spanned by the third and fourth tolerance range, the first and second tolerance sectors not overlapping. This makes it possible to avoid incorrect assignment of the first and second switching states.

In a special embodiment of the invention, the sensor system is taught in taking into account the output. In particular, the sensor system is taught in before the vehicle is started up for the first time.

In a preferred embodiment of the invention, the output is given to a vehicle control system and is output from there again after a command request, in particular to a user.

In an advantageous embodiment of the invention, the switching state is assigned a specific selection position and / or a specific selection movement and a specific switching position and / or a specific switching movement.

In a particularly preferred embodiment of the invention, the first sensor determines a selection position and / or a selection movement and the second sensor a switching position and / or a switching movement.

In a particularly preferred embodiment of the invention, the first characteristic value corresponds to a first selection position or a first selection movement and the second characteristic value corresponds to a first switching position or a first switching movement.

The sensor system can be installed in a drive train of a vehicle.

In a preferred embodiment of the invention, the sensor system can be provided for controlling a clutch of the vehicle, the clutch being controlled by an electronic clutch management and / or being a clutch-by-wire clutch.

Further advantages and advantageous embodiments of the invention result from the description of the figures and the figures.

Figure list

• 1: Eine Kupplung mit einem Sensorsystem in einer speziellen Ausführungsform der Erfindung.
• 2: Toleranzsektoren eines Sensorsystems in einer weiteren speziellen Ausführungsform der Erfindung.

The invention is described in detail below with reference to the figures. They show in detail:

• 1 : A coupling with a sensor system in a special embodiment of the invention.
• 2 : Tolerance sectors of a sensor system in a further special embodiment of the invention.

1 shows a clutch 20th with a sensor system 10 in a special embodiment of the invention. The sensor system 10 can be a selectable switching state of a transmission 12 read out in a vehicle and includes a first sensor 14 , which determines a first characteristic value in relation to the switching state and a second sensor 16 , which determines a second characteristic value in relation to the switching state.

The shift state corresponds to a gear position of a gear shift device 18th , The respective switching state corresponds to a respective gear of the gearshift device 18th ,

The first sensor 14 detects a selection position or a selection movement of the gear shift device 18th and the second sensor 16 determines a shift position or a shift movement of the gear shift device 18th , The first characteristic value can identify a first selection position or a first selection movement and the second characteristic value can identify a first switching position or a first switching movement.

The sensor system is installed in a drive train of the vehicle and for controlling the clutch 20th of the vehicle. The coupling 20th is controlled by an electronic clutch management ( EKM ) controlled. A clutch pedal and the clutch actuation of the clutch are unnecessary 20th done by a clutch actuator 22 which is operated electrically, hydraulically or electrohydraulically. The clutch actuator 22 may include clutch control of the EKM. To control the clutch 20th knowledge of the shift request and the gear selected is required. This data can be from the sensor system 10 to be provided.

In 2 are tolerance sectors 24 . 34 of a sensor system 10 shown in a further special embodiment of the invention. The first characteristic values determined by the first sensor are plotted on the horizontal axis and the second characteristic values determined by the second sensor are plotted on the vertical axis.

The first characteristic values detected by the first sensor identify a selection position or a selection movement of the gear shifting device, and the second characteristic values detected by the second sensor identify one Shift position or a shift movement of the gear shift device. The first characteristic value stands for a first selection position or a first selection movement and the second characteristic value stands for a first switching position or a first switching movement.

A first switching state is a first tolerance range 26 for the first characteristic value and a second tolerance range 28 assigned for the second characteristic value. The first and second tolerance range 26 . 28 extends at most over the entire, occurring or possible tolerances of the first and second characteristic values for the first switching state. The first tolerance range 26 and the second tolerance range 28 span a first tolerance sector 24 on.

Over the first and second tolerance range 26 . 28 it is checked whether the first characteristic value is within the first tolerance range 26 and the second characteristic value within the second tolerance range 28 lies. If the first and second characteristic values lie within the respective first and second tolerance ranges 26 . 28 , there is an output on the existence of the first switching state. The output can be made to a vehicle control system and from there can be output to a user who, for example, carries out the teach-in process of the sensor system.

During the teach-in process of the sensor system, the gear engaged by the user, on the basis of which the teach-in of the sensor system and the detection of the positions of the sensors of the sensor system take place, is thus displayed via the output of the first switching state. The security and the reliability of the method can thus be increased. Errors by the user, for example an incorrectly engaged or assigned gear, can be reduced or even avoided.

Further tolerance ranges can be defined for the first and second characteristic values, each of which corresponds to further switching states. For example, a third tolerance range corresponds 30th for the first characteristic value and a fourth tolerance range 32 a second switching state for the second characteristic value. The third tolerance range 30th and the fourth tolerance range 32 span a second tolerance sector 34 on, which characterizes the second switching state.

To avoid misclassifications, the respective tolerance sectors should 24 . 34 do not overlap.

Reference list

10

method

12th

transmission

14

sensor

16

sensor

18th

Gear shift device

20th

clutch

22

Clutch actuator

24

Tolerance sector

26

Tolerance range

28

Tolerance range

30

Tolerance range

32

Tolerance range

34

Tolerance sector

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 2005000888 A1 [0002]

Claims (10)

Method for teaching a sensor system (10), in which the sensor system (10) can read out a selectable switching state of a transmission (12) in a vehicle and comprises a first sensor (14) that determines a first characteristic value in relation to the switching state and one comprises a second sensor (16) which determines a second characteristic value in relation to the switching state, a first tolerance range (26) for the first characteristic value and a second tolerance range (28) for the second characteristic value corresponding to a first switching state and a check being carried out to determine whether the first characteristic value lies within the first tolerance range (26) and the second characteristic value lies within the second tolerance range (28) and, if both are given, an output is made on the presence of the first switching state. Procedure according to Claim 1 , characterized in that the gearshift state is a gear position of a gearshift device (18) and the first gearshift state corresponds to a first engaged gear. Procedure according to one of the Claims 1 or 2 , characterized in that a third tolerance range (30) for the first characteristic value and a fourth tolerance range (32) for the second characteristic value corresponds to a second switching state and a check is carried out to determine whether the first characteristic value within the third tolerance range (30) and the second characteristic value lies within the fourth tolerance range (32) and, if both are given, an output is made on the presence of the second switching state. Method according to one of the preceding claims, characterized in that the first and second tolerance ranges (26, 28) span a first tolerance sector (24) and the third and fourth tolerance ranges (30, 32) span a second tolerance sector (34), the first and the second tolerance sector (24, 34) do not overlap. Method according to one of the preceding claims, characterized in that the teaching of the sensor system (10) takes place taking into account the output. Method according to one of the preceding claims, characterized in that the teaching of the sensor system (10) takes place before the vehicle is started up for the first time. Method according to one of the preceding claims, characterized in that the switching state is assigned a specific selection position and / or a specific selection movement and a specific switching position and / or a specific switching movement. Method according to one of the preceding claims, characterized in that the first sensor (14) determines a selection position and / or a selection movement and the second sensor (16) determines a switching position and / or a switching movement. Method according to one of the preceding claims, characterized in that the first characteristic value corresponds to a first selection position or a first selection movement and the second characteristic value corresponds to a first switching position or a first switching movement. Method according to one of the preceding claims, characterized in that the sensor system (10) is provided for controlling a clutch (20) of the vehicle, the clutch (20) being controlled by an electronic clutch management and / or a clutch-by-wire clutch is.

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