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. 10, 2004
Filed:
Feb. 20, 2002
Franz Kunz, Altmannstein, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
An internal combustion engine has a camshaft with an adjustable phase position relative to the crankshaft. Upon starting the internal combustion engine, the phase position is derived from a crankshaft angle detected by a crankshaft sensor and a camshaft angle detected by a camshaft sensor. If the phase position is within a predetermined threshold of a predetermined phase position, a correction value is calculated based on the deviation of the phase position, otherwise, the actual phase position is equated to the phase position derived from the crankshaft angle and the camshaft angle in an emergency running mode. During normal operation the actual phase position is calculated based on the phase position, derived from the crankshaft angle and the camshaft angle, and the correction value. In the emergency running mode, at least one control signal for an actuator is determined as a function of the actual phase position.