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:
Sep. 06, 2011
Filed:
Jul. 17, 2008
Klaus Joos, Walheim, DE;
Georg Mallebrein, Korntal-Muenchingen, DE;
Federico Buganza, Nonantola, IT;
Carlos Koster, Campinas, BR;
Helerson Kemmer, Vaihingen, DE;
Kai Jakobs, Filderstadt, DE;
Juergen Pfeiffer, Pforzheim, DE;
Emilie Hincker-piocelle, Ludwigsburg, DE;
Werner Haeming, Neudenau, DE;
Pierre-yves Crepin, Stuttgart, DE;
Klaus Joos, Walheim, DE;
Georg Mallebrein, Korntal-Muenchingen, DE;
Federico Buganza, Nonantola, IT;
Carlos Koster, Campinas, BR;
Helerson Kemmer, Vaihingen, DE;
Kai Jakobs, Filderstadt, DE;
Juergen Pfeiffer, Pforzheim, DE;
Emilie Hincker-Piocelle, Ludwigsburg, DE;
Werner Haeming, Neudenau, DE;
Pierre-Yves Crepin, Stuttgart, DE;
Robert Bosch GmbH, Suttgart, DE;
Abstract
The invention deals with a method to determine the fuel composition of a fuel mixture from a first fuel and a second fuel for the operation of an internal combustion engine, wherein the first and the second fuel have different octane numbers and wherein the internal combustion engine has at least one knock sensor and a closed-loop knock control. Provision is made according to the invention for the composition of the fuel mixture to be determined by means of an output signal of the knock sensor. Provision is made in many cases for the knock sensor to already be in the internal combustion engine, so that it does not present any additional expenditure of money or effort. Because the octane number of the fuel mixture is determined by the mixing ratio of the fuels involved, which have different octane numbers, in retrospect the composition of the fuel mixture can be suggested from the signal of the knock sensor under suitable operating conditions.