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:
Jan. 15, 2008
Filed:
Dec. 16, 2004
Alexandre Pagot, Rueil Malmaison, FR;
Gaétan Monnier, Rueil Malmaison, FR;
Alexandre Pagot, Rueil Malmaison, FR;
Gaétan Monnier, Rueil Malmaison, FR;
Institut Francais du Petrole, Rueil Malmaison Cedex, FR;
Abstract
A supercharged internal-combustion engine has at least two cylinders with a combustion cycle during which a cylinder () of the engine is in the intake phase with burnt gas scavenging in the vicinity of the top dead center (TDC) thereof while another cylinder is in the exhaust phase in the vicinity of the bottom dead center (BDC) thereof, the cylinders having at least one intake () with an intake valve () and at least one exhaust () with an exhaust valve (). Controlling the engine includes carrying out scavenging of the burnt gases of the cylinder in the intake phase by a valve overlap stage by opening simultaneously its exhaust () and intake () valves, and controlling opening of exhaust valve () of the cylinder in the exhaust phase so that, during at least part of the overlap stage, the exhaust pressure (Pe) of the cylinder in the intake phase is lower than its intake pressure (Pa).