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:
Nov. 28, 2000
Filed:
Sep. 11, 1999
Frank Kirschbaum, Stuttgart, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
An electromagnetic actuator for the operation of a gas change valve has two electromagnets placed opposite to one another and an armature acting on the gas change valve that can be moved against the force of at least one valve spring. In an actuator of this kind, fluctuations of operational system parameters can lead to incorrect functioning and to increased wear of the actuator. With a new method for driving an actuator, the acceleration curve of the gas change valve is measured with an acceleration sensor and the energy supplied to the electromagnet capturing the armature is controlled according to the acceleration curve of the gas change valve. In this way, kinetic energy losses due to disturbances can be compensated so that the armature impacts the capturing electromagnet with a predetermined velocity.