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:
May. 15, 2012
Filed:
Jun. 15, 2009
Damian Dyrbusch, Ludwigsburg, DE;
Angelo Mazzon, Rutesheim, DE;
Damian Dyrbusch, Ludwigsburg, DE;
Angelo Mazzon, Rutesheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method of determining a pressure at a dosing valve of a fuel metering device for metering fuel into an exhaust gas system of a combustion engine with a component of the combustion engine assigned to an exhaust gas system for a regeneration, a temperature impingement and/or a thermo management. The fuel is injected in a flow direction of the exhaust gas in front of the component, and metering of the fuel is determined by an injection valve from a cycle duration and a duty cycle relation for controlling a shut-off valve and the dosing valve depending on a difference pressure. The method includes determining a pressure before the dosing valve via acquisition and processing of at least one replacement value deduced from a pressure sensor signal of a pressure sensor arranged in a flow direction of the fuel behind the dosing valve for recording a measured pressure.