| 摘要 |
PROBLEM TO BE SOLVED: To achieve a reduction in power consumption and suppression of deterioration of fuel economy by suppressing turbulence generation and an increase in a pressure loss when a butterfly valve is fully opened. SOLUTION: In this intake device for an internal combustion engine, the butterfly valve having a valve plate 4 divided into two first and second valve plates 5, 6 with a screw fastening portion 7 fastened and fixed to a valve shaft 3 by a plurality of fastening screws 8 as a boundary is arranged in an intake manifold 1. The first valve plate 5 arranged upstream of the screw fastening portion 7 in an intake air flow direction when the butterfly valve is fully opened has a bent portion 33 bent to a valve opening side in a valve rotating direction with respect to the pathline of an air flow flowing through the air flow passage 2 of the intake manifold 1. Thereby, when the butterfly valve is fully opened, it is possible to press a stopper lever to a fully open stopper by the assist of an intake load applied to the first valve plate 5. Accordingly, it is possible to reduce retaining torque required to maintain the butterfly valve in a valve fully open position. COPYRIGHT: (C)2010,JPO&INPIT
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