| 摘要 |
<p>An engine intake control system that includes a first intake passage (3) that has an upstream end portion and a downstream end portion opening in a surge chamber (2), a second intake passage (4) that has an upstream end portion opening in the surge chamber (2) so as to oppose the downstream end portion of the first intake passage across a gap, and a sleeve-shaped valve body (8) slidably fitted around the downstream end portion of the first intake passage (3) and moving between a first position in which it is distanced from the upstream end portion of the second intake passage (4) and a second position in which it is in contact with the upstream end portion, wherein a linear motion guide bearing system is provided between an intake manifold and the valve body (8), a rail (15) of the linear motion guide bearing system extending in a direction of movement of the valve body (8) is secured to a support post fixedly provided on the intake manifold, and a slider (16) movably straddle-mounted on the rail (15) is secured to the valve body (8). Thereby an engine intake control system can realize smooth movement of a valve body even with lower machining precision for sliding faces of a first intake passage end portion and the valve body.</p> |
