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. 12, 2005
Filed:
Oct. 17, 2001
Bernhard Vogt, Boeblingen, DE;
Achim Guenther, Stuttgart, DE;
Manfred Hundhausen, Bietigheim-Bissingen, DE;
Thomas Wenzler, Heimsheim, DE;
Bernhard Vogt, Boeblingen, DE;
Achim Guenther, Stuttgart, DE;
Manfred Hundhausen, Bietigheim-Bissingen, DE;
Thomas Wenzler, Heimsheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An internal combustion engine () is operated by a method wherein the fuel is supplied via a magnetic valve () having a coil (). The injected fuel quantity is influenced by the duration of the drive of the magnetic valve (). In the method, the temperature (evtmod) of a region () of the magnetic valve () is determined and the drive duration is corrected in dependence upon temperature. In order to make the correction still more precise, a temperature (evtmod) of the magnetic valve () is determined from at least one usually measured temperature (tans, tmot) and the drive duration (ti_tvu_w) is so corrected (tvsp_w) that the temperature dependency of the characteristics of the magnetic coil () of the magnetic valve () is considered. Furthermore, a model is suggested in which (starting from an operating temperature) the temperature trace is simulated after shut-off of the engine and/or for the restart of the engine by means of two factors for the warmup and cool down.