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:
Oct. 22, 2013
Filed:
Nov. 17, 2008
Guido Porten, Vaihingen/Enz, DE;
Juergen Raimann, Weil der Stadt, DE;
Guido Porten, Vaihingen/Enz, DE;
Juergen Raimann, Weil der Stadt, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
Suggested is a procedure for heating a catalyst in the exhaust gas system of a supercharged combustion engine with direct fuel injection and variable gas exchange valve control by producing a reactive exhaust gas fuel/air mixture in the exhaust gas system, whereby an air percentage of the reactive fuel/air mixture is thereby produced that air is rinsed from a suction system of the combustion engine over its combustion chambers into the exhaust gas system. The invention distinguishes itself thereby that the combustion engine is operated in idle mode after a cold start with a greater valve overlap and/or a greater valve overlap profile than in a normal operation where the catalyst is already heated as well as with an apportionment of a fuel amount that has to be injected before a combustion into at least two partial injections per ignition and combustion chamber and with a suboptimal ignition angle efficiency.