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:
Feb. 02, 1999
Filed:
Dec. 01, 1997
Klaus Ries-Muller, Bad Rappenau, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The invention is directed to a method of detecting disturbances of the crankshaft rpm for an internal combustion engine which are caused by an empty tank. Uneven-running values (LU) of the engine are detected which are distributed in bands of values and the spacing between the bands of uneven-running values (LU) is computed. A quantity of the engine is detected which is relevant to the exhaust gas of the engine. A check is then made to determine whether the computed band spacing is less than a pregiven threshold spacing and whether the exhaust-gas relevant quantity lies within a pregiven threshold value interval and, if so, this data is utilized as an indication that the disturbances of the crankshaft rpm are caused by an empty tank.