Patent ID: 9644581
Date: 2017-05-09
CPC Classifications: F02B,F02M,F16K,Y02T,Y10T

Claim:
1. A variable intake system which has an air duct that guides intake air into an engine and a variable valve comprising a valve flap having a variable opening degree to adjust an amount of the intake air, wherein the air duct includes a first inlet and a second inlet that are opened to an outside, wherein the air duct has a first flow path having one end connected with the first inlet and a second flow path having one end connected with the second inlet, wherein the second flow path shares a part of the first flow path, wherein another end of the first flow path and another end of the second flow path share a same outlet, wherein a length of the second flow path is longer than a length of the first flow path, and wherein the valve flap has a shape in which a lower portion of the valve flap is bent to form a predetermined angle with an upper portion of the valve flap in a cross section of the valve flap in the length direction of the first flow path or a shape in which the valve flap gradually curves toward the lower portion thereof, such that a lower end of the valve flap is spaced apart from an extended line which connects a center of the valve hinge and the upper portion of the valve flap in a direction in which the valve flap is opened, in a cross section of the valve flap in the length direction of the first flow path.