Method for monitoring the pressure in a device for pneumatically adjusting a seat in a transportation means
First Claim
1. A method for monitoring the pressure in a device for the pneumatic adjustment of a seat in a transportation means, wherein the device comprises a plurality of cushions configured to be filled with air and coupled via respective valves to a common preliminary pressure volume, wherein a pressure sensor is provided for measuring the pressure in the preliminary pressure volume and the preliminary pressure volume is coupled to a compressor for supplying compressed air without a non-return valve being connected therebetween, the method comprising the following steps:
- a) setting a predefined pressure in the preliminary pressure volume using at least one of the operation of the compressor and air discharge from the preliminary pressure volume via at least one leak, with the valve closed between the respective cushion and the preliminary pressure volume, wherein first, the compressor is operated to set a pressure in the preliminary pressure volume above the predefined pressure, and subsequently, with the compressor switched off, the predefined pressure is set by air discharge via the at least one leak and wherein size of the leak is not able to be controlled, wherein the predefined pressure deviates from a target pressure in the respective cushion by at most at least one of 10% of the target pressure and 50 hPa;
b) after setting of the predefined pressure, opening the valve between the respective cushion and the preliminary pressure volume and measuring the pressure in the preliminary pressure volume via the pressure sensor;
c) if the measured pressure deviates from the target pressure, setting the measured pressure to the target pressure by at least one of the operation of the compressor and air discharge from the preliminary pressure volume via the at least one leak.
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Accused Products
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.
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Citations
20 Claims
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1. A method for monitoring the pressure in a device for the pneumatic adjustment of a seat in a transportation means, wherein the device comprises a plurality of cushions configured to be filled with air and coupled via respective valves to a common preliminary pressure volume, wherein a pressure sensor is provided for measuring the pressure in the preliminary pressure volume and the preliminary pressure volume is coupled to a compressor for supplying compressed air without a non-return valve being connected therebetween, the method comprising the following steps:
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a) setting a predefined pressure in the preliminary pressure volume using at least one of the operation of the compressor and air discharge from the preliminary pressure volume via at least one leak, with the valve closed between the respective cushion and the preliminary pressure volume, wherein first, the compressor is operated to set a pressure in the preliminary pressure volume above the predefined pressure, and subsequently, with the compressor switched off, the predefined pressure is set by air discharge via the at least one leak and wherein size of the leak is not able to be controlled, wherein the predefined pressure deviates from a target pressure in the respective cushion by at most at least one of 10% of the target pressure and 50 hPa; b) after setting of the predefined pressure, opening the valve between the respective cushion and the preliminary pressure volume and measuring the pressure in the preliminary pressure volume via the pressure sensor; c) if the measured pressure deviates from the target pressure, setting the measured pressure to the target pressure by at least one of the operation of the compressor and air discharge from the preliminary pressure volume via the at least one leak. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A device for the pneumatic adjustment of a seat in a transportation means, the device comprising:
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a plurality of cushions configured to be filled with air and connected via respective valves to a common preliminary pressure volume, wherein a pressure sensor is provided for measuring the pressure in the preliminary pressure volume and the preliminary pressure volume is coupled to a compressor configured to supply compressed air without a non-return valve being connected therebetween, wherein the device further comprises a pressure monitoring system configured to carry out following method for monitoring the pressure in a respective cushion; a) setting a predefined pressure in the preliminary pressure volume by at least on of operating the compressor and air discharge from the preliminary pressure volume via at least one leak, with the valve closed between the respective cushion and the preliminary pressure volume, wherein wherein first, the compressor is operated to set a pressure in the preliminary pressure volume above the predefined pressure, and subsequently, with the compressor switched off, the predefined pressure is set by air discharge via the at least one leak and wherein size of the leak is not able to be controlled, wherein the predefined pressure deviates from a target pressure in the respective cushion by at most at least one of 10% of the target pressure and 50 hPa; b) after setting of the predefined pressure, opening the valve between the respective cushion and the preliminary pressure volume and measuring the pressure in the preliminary pressure volume via the pressure sensor; c) if the measured pressure deviates from the target pressure, setting the measured pressure to the target pressure by at least one of operating the compressor and air discharge from the preliminary pressure volume via the at least one leak. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification