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:
Jan. 26, 1999
Filed:
Dec. 12, 1996
Applicant:
Inventors:
Ernst Winklhofer, Johann ob Hohenburg, AT;
Harald Arnulf Philipp, Wegersfeld, AT;
Horst Tschetsch, Graz, AT;
Assignee:
AVL List GmbH, Graz, AT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01P / ; G01F / ;
U.S. Cl.
CPC ...
356 28 ; 7386105 ;
Abstract
For optical detection of the velocity of gas bubbles in the cooling liquid of an internal combustion engine, light is radiated into the coolant by means of at least one emitter, and the scattered light caused by the gas bubbles, or rather, the change in intensity of light radiation emitted into the coolant, is measured by an optical sensor. The scattered light or intensity change is measured in at least two adjacent areas, and the velocity of the bubbles is determined from the travel time between the measurement signals.