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:
Aug. 31, 2004
Filed:
Nov. 13, 2002
Helmut Schmied, Marbach, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An ignition system and a method for operating an ignition system provides reliable suppression of a closing spark ignition at relatively small expense and to achieve a reliable ignition by the ignition spark. To assure a high energy supply to the spark plug, an ignition system is created having a functional device for receiving a drive signal and for producing a pulse signal, an ignition transistor for receiving the pulse signal, an ignition coil, whose primary winding connections are connected in a primary current circuit that is fed by a vehicle power supply source and that can be switched using the ignition transistor, and whose secondary winding connections are connected in a secondary current circuit for receiving a spark plug. In the secondary current circuit, a component is provided that a) lets through a forward current in its forward direction that may be induced by reducing the magnetic field of the ignition coil, b) blocks in its blocking direction without a previous forward current, and c) over a conducting period, after a previous forward current maintains in its blocking direction a current that is suitable for maintaining an ignition process.