| 摘要 |
PCT No. PCT/US97/18602 Sec. 371 Date Apr. 16, 1999 Sec. 102(e) Date Apr. 16, 1999 PCT Filed Oct. 16, 1997 PCT Pub. No. WO98/16729 PCT Pub. Date Apr. 23, 1998An exhaust control mechanism is provided for use in a model engine system having a source of engine exhaust. The exhaust control mechanism includes first and second tubes and a valve movable in one of the first and second tubes. The first tube includes an upper portion, a lower portion, and a first passage extending through the upper portion and lower portion. The upper portion of the first tube is adapted to couple to a source of engine exhaust. The second tube is coupled to the first tube and the second tube is formed to include a second passage that intersects the first passage formed in the first tube at an intersection region. The valve is movable in one of the first and second tubes to extend into the intersection region.
|
