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:
Mar. 31, 2009
Filed:
Oct. 20, 2004
Klaus Vogelsang, Crailsheim, DE;
Kurt Adleff, Crailsheim, DE;
Reinhold Pittius, Crailsheim, DE;
Voith Turbo GmbH & Co. KG, Heidenheim, DE;
Abstract
The invention relates to a method for optimizing engine braking in a drive unit, particularly used for motor vehicles, comprising an internal combustion engine consisting of a crankshaft, and an exhaust gas turbine which is connected to a crankshaft via a transfer device. A hydrodynamic coupling is arranged in the transfer device. The invention is characterized by the following features: in one operational state corresponding to braking operation with an engine brake, the exhaust gas is operated at a working point which is characterized by the maximum acceptable limiting speed nof the exhaust gas turbine at a minimum output moment Mand in another operational state corresponding to the partial load operation or thrust operation, the exhaust gas turbine is operated at a working point which is characterized by a minimum speed nand minimum receivable moment M, wherein adjustment of both working points is carried out by the hydrodynamic coupling, such that it can be operated according to at least one characteristic whose transferable moment corresponds to the minimum outputtable or receivable moment Mof the exhaust gas turbine over a large part of the speed difference characterizing the slip range taking into account the multiplication of the transfer elements in the transfer device to the exhaust gas turbine.