Air Filter for a Vehicle Air Conditioning System, Vehicle Air Conditioning System Comprising an Air Filter with a Moisture Sensor and a Method for Operating a Vehicle Air Conditioning System
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorsJoern HOFHAUS, Gregor Wendrock
Life of this patent
Estimating the term…
Abstract
An air filter, which is intended for installation in an air conditioning system of a vehicle and which exhibits a moisture sensor, is disposed on and/or at the air filter. The moisture sensor is a component of an electric circuit section, which is arranged on and/or at the air filter. The moisture sensor is a capacitive sensor, whose capacitance depends on the moisture loading of the air, flowing around the sensor. At least one electric property of the electric circuit section represents the type of air filter.
Claims28
An air filter for use in an air conditioning system of a vehicle, comprising:
- an electric circuit section arranged at least one of on and at the filter, said electric circuit section including a moisture sensor;
- and
- wherein the electric circuit section includes at least one electric property representative of a type of the air filter.
A vehicle air conditioning system, comprising:
- an air filter operatively installed in the vehicle air conditioning system;
- an electric circuit section arranged at least one of on and at the filter, said electric circuit section including a moisture sensor;
- and
- wherein the electric circuit section includes at least one electric property representative of a type of the air filter.
A method of operating a vehicle air conditioning system having an air filter and a moisture sensor disposed at least one of on and at the air filter, the method comprising the acts of:
- generating a moisture signal from the moisture sensor which is a component of an electric circuit section arranged at least one of on and at the air filter;
- and
- determining a type of air filter by way of an electronic device as a function of a magnitude of a signal property of the generated moisture signal.
The method according to 24, further comprising the acts of:
- determining an order of magnitude of a natural frequency of at least one of the moisture sensor and an electric circuit containing the moisture sensor by way of the electronic device;
- and
- determining from the order of magnitude of the natural frequency the type of air filter.
Dependencies are inferred from the claim text.