| 摘要 |
PURPOSE:To simplify the shape of a swing valve and to reduce residual fluid by boring two intake passages having a large-sized receive port capable of opening upward in a swing block. CONSTITUTION:An intake port 8 is disposed at the front end surface 4a of a swing block 4, and outlets 9, 10 are disposed at both-sided symmetrical positions. A receive port 13 is opened at one side surface 4c of a swing block 4. The receive ports 13, 14 are larger than bores of cylinders 5, 6, and kept away from the front wall surface 3a as much as possible. Accordingly, intake efficiency is high. Furthermore, as the space between the swing block 4 and the inner wall surface of a housing 3 is reduced, there is little residual concrete. |
