Patent · US Active

Air filter having a moisture sensor for identifying type of filter and moisture content and method of using filter in a vehicle air conditioning system

US8539778B2 · kind B2 · utility

2Cited by

9References

23Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Joern Hofhaus · Freising, DE
Gregor Wendrock · Munich, DE

Key dates

Filing date	Feb 16, 2010
Grant date	Sep 24, 2013
Priority date	—
Expiry date	Jul 3, 2032

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60H2003/0683
WIPO fieldChemical engineering
WIPO sectorChemistry

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 or at the air filter. The moisture sensor is a component of an electric circuit section, which is arranged on 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 moisture loading on the air filter and the type of air filter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.