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. 22, 2009
Filed:
Aug. 18, 2005
Nicolas Auffret, Lyons, FR;
Nicolas Dronniou, Lyons, FR;
Nicolas Auffret, Lyons, FR;
Nicolas Dronniou, Lyons, FR;
Renault Trucks, Saint-Priest, FR;
Abstract
This method is for controlling the intake and exhaust valves of the cylinders of an internal combustion engine which is capable of operating either in four-stroke positive mode or in two-stroke braking mode. The control means pilot the valves so that at least a first exhaust valve of each cylinder () is opened (C) prior to a first instant (t) when the piston of said cylinder reaches its top dead center position and so that the first exhaust valve is kept in an open state (C) with a first lift (L) and for a first predetermined period of time (Δt), prior to said first instant (t), and at least an exhaust valve is kept in an open state, with a second lift (L) higher than the first lift and for a second predetermined period of time (Δt), after the first instant (t).