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. 16, 2013
Filed:
May. 12, 2008
Fredrik Swartling, Södertälje, SE;
Mikael Hanson, Årsta, SE;
Fredrik Swartling, Södertälje, SE;
Mikael Hanson, Årsta, SE;
Scania CV AB (Publ), , SE;
Abstract
In a method and a system for controlling the Variable Turbine Geometry (VTG) of a combustion engine during up-gear shift, the VTG is opened based on a prediction when exhaust gas pressure is stabilized. During up-gear shift the VTG is closed to a closed position () to build an exhaust gas pressure and reduce engine speed, and a parameter from which the engine acceleration can be deduced is recorded. The VTG is determined to be opened to an open positioning response to the recorded parameter and a target engine speed of the up-gear shift (), and the VTG is opened at a time corresponding to said determination to reduce the exhaust gas pressure (). Hereby the up-gear shift can be made in a short time and at smooth operational conditions.