The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1993
Filed:
Feb. 26, 1992
Jorg Abthoff, Pluderhausen, DE;
Hans-Dieter Schuster, Schorndorf, DE;
Friedhelm Nunnemann, Winnenden, DE;
Gunter Loose, Remseck, DE;
Michael Osswald, Ludwigsburg, DE;
Michael-Rainer Busch, Ebersbach, DE;
Markus Fortkord, Waiblingen, DE;
Mercedes-Benz AG, , DE;
Abstract
The quality of the external air is determined by means of a pollutant sensor. The quality of the internal air is determined by calculation taking account of the air quantities introduced from outside into the internal space. A decision between air supply operation and air recirculation operation is then made on the basis of a comparison of the air qualities inside and outside. The pollutant sensor is preferably located in a casing whose internal space is accessible to gases through an opening which is preferably sealed by a gas-permeable membrane.