| 摘要 |
An intake manifold with variable intake tract configurations for an internal combustion engine is provided, wherein pairs of long and short intake runners are located between inlet plenum chambers and respective manifold outlets, and a rotary valve located between a manifold wall and a row of short intake runners is selectively movable between a first position isolating the short runners from the intake air and isolating the inlet plenum chambers from one another, a second position isolating the short runners from the intake air while permitting communication between the plenum chambers, and a third position permitting the short runners to draw air directly from the plenum chambers. The resulting manifold provides a space- and cost-efficient mechanism for providing variable intake tract configurations, and eases accommodation of other design requirements in the design of the manifold.
|
