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:
Mar. 26, 2002
Filed:
May. 25, 2000
Hartmut Schumacher, Freiberg, DE;
Klaus Ringger, Nuertingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The ohmic resistance of a firing element connected in series to a capacitance is measured by charging the capacitance with a measured current for a specifiable charging time, by recording a first firing circuit voltage which drops at the firing circuit at the end of the charging operation and by recording a second firing circuit voltage after the measured current is disconnected and by determining the resistance of the firing element from the two firing circuit voltages and the measured current. An exact measurement of the resistance of the firing element regardless of capacitance fluctuations is made possible in that the charging time for the capacitance of the firing circuit is rated in such a way that the second firing circuit voltage corresponds to a setpoint value.