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:
Apr. 17, 2007
Filed:
Jun. 10, 2003
Willi Kuehn, Markgroeningen, DE;
Ewald Stuible, Eberdingen, DE;
Rupert Fackler, Pleidelsheim, DE;
Christian Klein, Oberriexingen, DE;
Bernd Gussmann, Herrenberg, DE;
Christian Schwientek, Neckarsulm, DE;
Ingo Mueller-vogt, Markgroeningen, DE;
Willi Kuehn, Markgroeningen, DE;
Ewald Stuible, Eberdingen, DE;
Rupert Fackler, Pleidelsheim, DE;
Christian Klein, Oberriexingen, DE;
Bernd Gussmann, Herrenberg, DE;
Christian Schwientek, Neckarsulm, DE;
Ingo Mueller-Vogt, Markgroeningen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for regulating the current through an electromagnetic actuator. The actuator, a first switch and a current-measuring circuit form a series circuit. A free-wheeling diode is parallel-connected to the actuator. The first switch is closed and opened by a control and a pulse generator using a PWM signal (PWM=pulse width modulation) in such a way that the current flowing through the actuator and measured by the current-measuring circuit is regulated to a setpoint value (SW). The time duration of one on and off switching cycle of the PWM signal is altered, and a so-called dither function in the form of a low-frequency oscillation is superimposed on the PWM signal.