Patent ID: 8342204

Claim:
A rotary valve for use in an internal combustion engine, the rotary valve comprising: a valve body having a curved portion and two side portions, wherein a line extending through the respective centers of the side portions defines an axis of rotation of the rotary valve, wherein the valve body is configured to engage a component of the internal combustion engine for 360 degree rotation about the axis, the valve body including: a first fluid connection arranged in the body to fluidly connect at least one of the side portions and the curved portion, via a first opening in at least one of the side portions and a second opening in the curved portion; a second fluid connection arranged in the body to fluidly connect at least one of the side portions and the curved portion, via a third opening in at least one of the side portions and a fourth opening in the curved portion, respectively; and a central passage arranged in the body fluidly isolated from the first and third openings, the axis of rotation comprising a central longitudinal axis of the central passage, wherein the fourth opening has a flow area which is smaller than the flow area of the second opening; and wherein the fourth opening is offset with respect to the second opening in a direction of rotation of the rotary valve.