| 摘要 |
PROBLEM TO BE SOLVED: To provide a throttle valve device capable of improving response in accelerator operation in throttle valve devices with a throttle valve being perpendicular to a bore in a full close position of a throttle valve. SOLUTION: This device is provided with a throttle body main body 110 forming the bore 112, a throttle shaft 120 rotatably supported by the throttle body main body 110, and the throttle valve 122 fixed on the throttle shaft 120 and opening and closing the bore 112 by accelerator operation. The throttle valve 122 gets perpendicular to the bore 112 at the fill close position. The bore 112 is provided with a main tubular part 113, an upstream side expanded tubular part 114 and/or a downstream side expanded tubular part 115. COPYRIGHT: (C)2004,JPO&NCIPI
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