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:
May. 28, 2002
Filed:
Apr. 17, 2000
Klaus Allmendinger, Bachhagel, DE;
Martin Hart, Leinfelden, DE;
Robert Loisch, Boeblingen, DE;
Matthias Scherer, Esslingen, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
The invention provides for a method and device for determining a gas pressure and temperature in a hollow space, including a fuel/air mix in an internal combustion engine combustion chamber. According to the invention, pressure and temperature are detected by means of a measuring element ( ) of an ultrasound transducer/pressure sensor combined unit, said measuring element acting both as a pressure measuring element and an ultrasound transducer element to determine temperature. Therefor, said measuring element can be operated at given moments, on one hand as a pressure measuring element and on the other hand as an ultrasound transducer element or continuously, as a pressure measuring element, and furthermore as an ultra-sound transducer element superimposed with the latter. In that case, it is provided that signals should be conveniently separated for the measuring element output signal. The invention can be used, for instance, to determine air volumes for car internal combustion engines.