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:
Dec. 02, 1997
Filed:
Oct. 11, 1996
Jose L De La Cruz, San Antonio, TX (US);
Ronald M Estefan, deceased, late of San Antonio, TX (US);
Southwest Research Institute, San Antonio, TX (US);
Abstract
A test apparatus includes a test chamber adapted to support a test piece having the shape characteristic of an engine intake valve. Means are provided for heating the test piece, delivering a selected test fuel to the test chamber at a controlled rate and at selected intervals, and for delivering a flow of heated air through the test chamber at a preselected temperature and volumetric rate. A method for determining the relative ability of a fuel to form deposits on an engine intake valve includes placing a test piece having the shape characteristics of an engine intake valve in a test chamber, heating and maintaining the test piece at a predetermined temperature, passing a stream of heated air through the test chamber at a controlled temperature and flow rate, and alternately repeatably spraying a sample fuel onto the test piece and drying the test piece, for a period of time sufficient to establish the deposit-forming characteristics of the sample fuel.