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Method for monitoring pressure in a device for pneumatically adjusting a seat in a vehicle
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A vehicle and pressure technology, applied in the measurement of hydraulic/pneumatic force, measuring fluid pressure through mechanical components, vehicle seats, etc., can solve the problem of prolonged filling time, and achieve the effect of fast and accurate pressure measurement
Active Publication Date: 2021-01-05
CONTI TEMIC MICROELECTRONIC GMBH
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[0005] However, the use of a check valve between the compressor and the preliminary pressure chamber has disadvantages
In particular, the non-return valve introduces a not insignificant pressure loss during the filling of the pad and thus leads to a prolongation of the filling time of the pad
Moreover, the use of check valves creates additional costs
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[0028] Below, will be in figure 1 An exemplary embodiment of the method according to the invention is described on the basis of the shown device for pneumatic seat adjustment. The seat adjustment device is integrated in a seat of a motor vehicle and serves, for example, as a lumbar support. The seat adjustment device comprises five air cushions 101 , 102 , 103 , 104 and 105 which are filled with air differently and thus have different volumes and pressures depending on the setting of the seat. For the currently selected seat setting, the corresponding target pressures for the individual pads are stored, specifically target pressure p1 for pad 101 , target pressure p2 for pad 102 , target pressure p3 for pad 103 , target pressure p4 for pad 104 and the target pressure p5 of the pad 105 . The pressure in the individual pads should correspond to these target pressures in order thereby to ensure the selected seat setting.
[0029] Each individual pad is assigned a 3 / 3-way valve...
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Abstract
The invention relates to a method for monitoring the pressure in a device for the pneumatic adjustment of a seat in a transportation means, in particular in a motor vehicle. The device comprises a plurality of cushions (101, 102, . . . , 105) which are able to be filled with air and which are connected via respective valves (201, 202, . . . , 205) to a common preliminary pressure volume (3), wherein a pressure sensor (4) is provided for measuring the pressure (p) in the preliminary pressure volume (3) and the preliminary pressure volume (3) is coupled to a compressor (6) for supplying compressed air without a non-return valve being connected therebetween. For the purpose of monitoring the pressure in a respective cushion (101, 102, . . . , 105), a predefined pressure is set in the preliminary pressure volume by way of operation of the compressor (6) and / or by way of air discharge from the preliminary pressure volume (3) via at least one leak, with the valve (201, 202, . . . , 205) between the respective cushion (101, 102, . . . , 105) and the preliminary pressure volume (3) closed, wherein the predefined pressure deviates from a target pressure (p1, p2, . . . , p5) in the respective cushion (101, 102, . . . , 105) by at most 10% of the target pressure and / or at most 50 hPa. After the setting of the predefined pressure, the valve (101, 102, . . . , 105) between the respective cushion (101, 102, . . . , 105) and the preliminary pressure volume (3) is opened and the pressure in the preliminary pressure volume (3) is measured via the pressure sensor (4). If the measured pressure (p) deviates from the target pressure (p1, p2, . . . , p5), the measured pressure (p) is set to the target pressure (p1, p2, . . . , p5) by way of operation of the compressor (6) and / or by way of air discharge from the preliminary pressure volume (3) via the at least one leak.
Description
technical field [0001] The invention relates to a method for monitoring the pressure in a device for pneumatically adjusting a seat in a vehicle. Background technique [0002] In vehicles such as, for example, motor vehicles or also rail vehicles or aircraft, devices for pneumatic seat adjustment are increasingly being used. In such devices, padded elastic pads are used to contour the seat or for massage purposes. These devices allow the seat to be individually adapted to the occupant. [0003] Devices for pneumatic seat adjustment are usually equipped with pressure measuring devices in order to measure, store and (if necessary) re-establish the prevailing air pressure in each pad. The measurement of the pressure and the corresponding readjustment allow compensation of pressure changes due to fluctuations in the ambient pressure or ambient temperature but also due to leaks. [0004] Conventionally, in devices for pneumatic seat adjustment, the pressure of the respective p...
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