Device for detecting a filter loading
AssigneeFord Global Technologies, LLC
InventorsBernd Dienhart, Klaus Schuermanns, Volker Scheer, Ingo Krolewski
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Abstract
A filter device of an air-conditioning system of a motor vehicle is provided. The filter device has at least one indicator device arranged in the filter device, the indicator device having at least one electrically conductive indicator material, the conductive characteristics of which vary in a manner dependent on the degree of loading of the filter device with filtered particles. Also provided is a motor vehicle having an air-conditioning system comprising the filter device, and a method for detecting the state of the filter device.
Claims19
An arrangement of a filter device, configured for filtering particles out of an air stream of an air-conditioning system of a motor vehicle, the filter device comprising:
- a plurality of indicator devices arranged in the filter device, each of the plurality of indicator devices having at least one electrically conductive indicator material, the conductive characteristics of which vary in a manner dependent on the degree of loading of the filter device with filtered particles, wherein each indicator device has a different indicator material configured for detecting a different substance;
- a measuring device for measuring a resistance of the plurality of indicator devices;
- and
- a control device configured to compare the measured resistances with a reference curve, wherein a relative life expectancy of the filter device is evaluated and displayed in the vehicle.
A motor vehicle comprising:
- an arrangement of a filter device, configured for filtering particles out of an air stream of an air-conditioning system of a motor vehicle, the filter device comprising:
- plurality of indicator devices arranged in the filter device, each of the plurality of indicator devices having at least one electrically conductive indicator material, the conductive characteristics of which vary in a manner dependent on the degree of loading of the filter device with filtered particles, wherein each indicator device has a different indicator material configured for detecting a different substance;
- a measuring device for measuring a resistance of the plurality of indicator devices;
- and
- a control device configured to compare the measured resistances with a reference curve, wherein a relative life expectancy of the filter device is evaluated and displayed in the vehicle.
Dependencies are inferred from the claim text.