Patent ID: 7588007

Claim:
An intake system of an internal combustion engine 10 for supplying intake air to a plurality of cylinders of the engine, wherein the intake air is sucked through an air cleaner 32 and led into an intake port 16 of the engine 10 by an intake pipe 34 upon the opening of an intake valve 12 , the intake system comprising: an air intake 20 which includes a plurality of wings 22 for generating a swirl form of the intake air at a suction pipe 30 and a frame 24 for fixing wings 22 on the suction pipe 30 ; an intake manifold 40 which includes a surge tank 42 and is communicated between the intake pipe 34 and the intake port 16 of the engine 10 so as to equalize a discharge pressure of the intake air that is passed through the air cleaner 32 and supplies the equalized air to the intake port 16 of the engine 10 , the intake manifold being inclined at a desired angle; first suction chambers 50 that form a plurality of equalized air chambers extending separately from the intake manifold 40 , the first suction chambers 50 being connected between the intake manifold 40 and the intake port 16 of the engine 10 upwardly at a predetermined inclination angle about the intake manifold 40 , configured to supply the equalized air to the intake port by enabling the intake manifold 40 to be communicated with the equalized air chambers and enable the intake air deflected by the closing of the intake valve to be reversely flowed along the upwardly extended equalized air chambers; first suction balancers 60 which are connected to the first suction chambers 50 and configured to fill the intake air that flows reversely through the first suction chambers 50 and dispense the filled intake air by a flow speed of the intake air supplied through the intake manifold 40 , when the intake valve 12 is re-opened; a second suction chamber 50 ′ which is connected to the intake pipe 34 and is communicated between the surge tank 42 of the manifold 40 and air cleaner 32 , so that the second chamber 50 ′ enables the reversely flowed intake air to be filled in the second suction balancer 60 ′ and mixed with the intake air newly supplied through the air intake 20 and passed through the air cleaner 32 ; and a second suction balancer 60 ′ which is connected to the second suction chamber 50 ′ via a tube 62 so as to communicate the mixed air of the second suction chamber 50 ′ with the surge tank 42 .