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. 06, 2020
Filed:
Jun. 28, 2017
Scania Cv Ab, Södertälje, SE;
Niclas Gunnarsson, Huddinge, SE;
Erik Höckerdal, Södertälje, SE;
Scania CV AB, Södertälje, SE;
Abstract
Provided is a method for changing gear ratio in a gearbox comprising: receiving a signal to change the gear ratio; calculating braking torque that the engine should provide to reduce the rotational speed of the engine to a target rotational speed; phase-shifting a second camshaft in relation to the crankshaft, to a state where the exhaust valve is controlled to be opened during the expansion stroke and closed during the exhaust stroke; disconnecting the engine from the driving wheel; opening and closing the exhaust valve with a decompression device in a transition area between an exhaust stroke and an inlet stroke and also between a compression stroke and an expansion stroke, when the piston is at a top dead center in the cylinder to achieve engine braking through compression in the cylinders during the exhaust stroke and the compression stroke, and f) shifting a gear in the gearbox.