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:
Feb. 04, 2025
Filed:
Jun. 11, 2021
Applicant:
Scania Cv Ab, Södertälje, SE;
Inventors:
Håkan Sarby, Huddinge, SE;
Andreas Dahl, Nyköping, SE;
Ola Jönsson, Huddinge, SE;
Fredrik Birgersson, Stockholm, SE;
Marcus Ahlin, Strängnäs, SE;
Assignee:
Scania CV AB, Södertälje, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02D 13/02 (2006.01); F02B 1/14 (2006.01); F02B 75/02 (2006.01);
U.S. Cl.
CPC ...
F02D 13/0215 (2013.01); F02B 1/14 (2013.01); F02B 75/02 (2013.01); F02B 2075/027 (2013.01); F02D 2200/101 (2013.01); F02D 2250/28 (2013.01);
Abstract
The disclosure concerns a method for vibration reduction in a compression ignition four-stroke internal combustion engine. The internal combustion engine comprises exhaust and intake valves controlled by exhaust and intake camshafts. The method comprises, when operating the internal combustion engine below a threshold rotational speed, steps of: changing a timing of the exhaust camshaft to advance closing of the exhaust valve, and —changing a timing of the intake camshaft to delay opening of the intake valve.