| 摘要 |
PURPOSE: Structure for a variable turbocharged pipe in a vehicle intake system is provided to improve efficiency of an engine by flowing outer air to a combustion chamber in suction stroke. CONSTITUTION: An intake pipe comprises a first intake pipe(100 connected to an air cleaner; a U-turn pipe(3) combined with the first intake pipe to slide; an elastic member(5) fixing the U-turn pipe; and a second intake pipe(7) combined with the end of the U-turn pipe and connected to an intake manifold. The pipe is moved in the intake manifold through the air cleaner, the first intake pipe, the U-turn pipe and the second intake pipe in suction stroke of a piston for sucking outer air to a combustion chamber. The U-Turn pipe and the entire intake pipes are kept long by tension of a coil spring in low rpm(revolutions per minute) of an engine. The suction pressure is decreased in the high rpm of the engine, and the U-turn pipe is moved in the first and second intake pipes by the difference between pressure of the intake pipe and atmospheric pressure. The entire length of the intake pipe is reduced, and the efficiency of the engine is improved by adjusting the length of the intake pipe properly with the length of the intake pipe being in inversely proportional to the rpm of the engine in the inertial turbocharged system.
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