Valve arrangement
AssigneeVolvo Truck Corporation
InventorsArne Andersson, Bincheng Jiang, Staffan Lundgren, Håkan Sandström
Life of this patent
Estimating the term…
Abstract
A valve arrangement for a cylinder of an internal combustion engine arrangement includes a check valve configured to be positioned at an intake side port of the cylinder for controlling gas flow into the cylinder, wherein the valve arrangement further includes an intake valve arrangement positioned upstream from the check valve, and an actuating arrangement configured to controllably position the intake valve arrangement for closing the intake side port.
Claims19
A valve arrangement for a cylinder of an internal combustion engine arrangement, the valve arrangement comprising a check valve configured to be positioned at an intake side port of the cylinder for controlling gas, flow into the cylinder, an intake valve means positioned upstream from the check valve, and a pulse controlled actuating means configured to controllably position the intake valve means for closing the intake side port, wherein, when in a closed position, the intake valve means contacts an outer surface of the cylinder around the intake port and seals against the outer surface of the cylinder around the intake side port when pressure inside of the cylinder is lower than pressure outside of the cylinder.
A valve arrangement for a cylinder of an internal combustion engine arrangement, the valve arrangement comprising a check valve configured to be positioned at an intake side port of the cylinder for controlling gas flow into the cylinder, an intake valve means positioned upstream from the check valve, and a pulse controlled actuating means configured to controllably position the intake valve means for closing the intake side port, wherein the cylinder comprises a cylinder relief through hole, which in conjunction with a recess arranged in the intake valve means provides fluid communication between an inside volume of the cylinder and a volume delimited by the intake valve means and the check valve when the intake valve means and the check valve are arranged for closing the intake side port.
A valve arrangement for a cylinder of an internal combustion engine arrangement, the valve arrangement comprising a check valve configured to be positioned at an intake side port of the cylinder for controlling gas flow into the cylinder, an intake valve means positioned upstream from the check valve, and a pulse controlled actuating means configured to controllably position the intake valve means for closing the intake side port, wherein the check valve comprises a check valve relief through hole for providing fluid communication between an inside volume of the cylinder and a volume delimited by the intake valve means and the check valve when the intake valve means and the check valve are arranged for closing the intake side port.
A method for a cylinder of an internal combustion engine arrangement comprising a check valve configured to be positioned at an intake side port of the cylinder for controlling gas flow into the cylinder, and an intake valve means positioned upstream from the check valve, the method comprising:
- controlling a pulse controlled actuating means to controllably position the intake valve means for closing the intake side port;
- allowing, when the intake valve means has been positioned such that it closes the intake side port and a piston in the cylinder moves downward, pressure in the cylinder to be reduced and the intake valve means to be kept in the closed position by a pressure difference between pressure inside the cylinder and pressure outside the cylinder;
- and
- allowing retracting means to position the intake valve means for opening the intake side port when pressure in the cylinder is above a predetermined pressure threshold limit.
Dependencies are inferred from the claim text.