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. 27, 2021
Filed:
Sep. 10, 2018
Freevalve Ab, Ängelholm, SE;
Anders Höglund, Munka Ljungby, SE;
Urban Carlson, Helsingborg, SE;
FREEVALVE AB, Ängelholm, SE;
Abstract
An internal combustion engine includes combustion chambers, each having a controllable intake valve opening and closing an intake port, a controllable exhaust valve opening and closing an exhaust port, a piston displaceable back and forth in the combustion chamber between a top dead center and a bottom dead center, and a fuel injector. The engine further including an intake manifold connected to the intake port of each combustion chamber. The engine can be operated in a low load mode, wherein each combustion chamber is driven in four-stroke operation including a 720 crank angle degrees cycle, and opens the intake port during the exhaust stroke, the intake port starting to open in 610-690 CAD, closing the exhaust port during the exhaust stroke, becoming fully closed in 630-710 CAD, forcing exhaust gas into the intake manifold by the piston, and mixing fuel and exhaust gas in the intake manifold.