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. 21, 2008
Filed:
Mar. 10, 2005
Ravishankar Ramamurthy, Westland, MI (US);
Laurentiu Vaduva, Harper Woods, MI (US);
Admir Krejo, Canton, MI (US);
Ravishankar Ramamurthy, Westland, MI (US);
Laurentiu Vaduva, Harper Woods, MI (US);
Admir Krejo, Canton, MI (US);
Detroit Diesel Corporation, Detroit, MI (US);
Abstract
A method for controlling exhaust gas particulate emissions from a compression ignition internal combustion engine having a variable geometry turbocharger (VGT) includes the steps of determining backpressure across the engine and air mass flow into the engine, closing vanes of the VGT to provide air mass flow increase when backpressure is increasing, and stopping the step of closing the vanes of the VGT when a decrease in rate of change of air mass flow is determined.