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:
Jul. 07, 1998
Filed:
Mar. 11, 1996
Robert Bosch GmbH, Stuttgart, DE;
Abstract
In a method for measuring lift of a valve needle and for adjusting the volume media flow of a valve, easily focused, high-energy radiation is used, which permits a contact-free measuring operation. The high-energy radiation is directed at the valve-closure member that is permanently joined to the valve needle in the installed valve. By performing a differential measurement, thus a measurement in both end positions of the valve needle, the lift of the valve needle can be determined and, thus, corrected. The measurement is performed on a dry valve. The method is particularly suited for electromagnetically actuated fuel-injection valves of mixture-compressing internal-combustion engines having externally supplied ignition.