Patent ID: 7942125

Claim:
An air intake and exhaust system for supplying intake air to a cylinder of an internal combustion engine and expelling an exhaust gas from the cylinder, wherein the intake air is sucked through an air cleaner and led into an intake port of the engine by an intake pipe upon opening of an intake valve, the air intake and exhaust system comprising: an air intake including a plurality of wings for swirling intake air at a suction pipe and a frame for securing wings on the suction pipe; an intake manifold including a surge tank and communicating between the intake pipe and the intake port of the engine so as to equalize a discharge pressure of the intake air that is passed through the air cleaner and supplies the equalized air to the intake port of the engine, the intake manifold being inclined at a desired angle; first suction chambers that form a plurality of equalized air chambers extending separately from the intake manifold, the first suction chambers being connected between the intake manifold and the intake port of the engine upwardly at a predetermined inclination angle about the intake manifold, configured to supply the equalized air to the intake port by enabling the intake manifold to be communicated with the qualized 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 which are connected to the first suction chambers and configured to fill the intake air that flows reversely through the first suction chambers and dispense the filled intake air by a flow speed of the intake air supplied through the intake manifold, when the intake valve is re-opened; a second suction chamber which is connected to the intake pipe and is communicated between the surge tank of the manifold and air cleaner, so that the second chamber enables the reversely flowed intake air to be filled in the second suction balancer and mixed with the intake air newly supplied through the air intake and passed through the air cleaner; a second suction balancer which is connected to the second suction chamber via a tube so as to communicate the mixed air of the second suction chamber with the surge tank; an exhaust manifold, mounted to the engine and configured to expel air burned in the cylinder, when an exhaust valve is opened; a plurality of exhaust pipes, connected to the exhaust manifold, configured to dispense an exhaust gas; a muffler; an orifice tube arranged between an inlet and an outlet of the muffler so as to enable a part of the exhaust gas to be passed through the muffler depending on a flow speed of the exhaust gas that has passed through the orifice tube and increasing an exhaust speed of the exhaust gas; and a plurality of exhaust balancers connected to the orifice tube so as to fill a part of the exhaust gas inside and then re-exhaust the filled exhaust gas when the exhaust is completed.