Impulse valve for steam engine |
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| 申请号 | JP20763482 | 申请日 | 1982-11-29 | 公开(公告)号 | JPS5999016A | 公开(公告)日 | 1984-06-07 |
| 申请人 | Komatsu Ltd; | 发明人 | HARAGA HISATO; | ||||
| 摘要 | PURPOSE:To reduce an irreversible loss and increase effective work of a steam engine by delaying the closing timing of an inpulse valve relative to its opening timing so that its opening and closing timings may be asymetric relative to the top dead center, that is, the time span up to the top dead center is shortened. CONSTITUTION:When a piston 12 moves upward and approaches to the top dead center, its projection 23 pushes an impulse valve 20 upward. Because of this, an intake port 17 is opened to allow the steam having a pressure P1 flows from a space 18 in a cylinder head 10 to a cylinder 11. Also, a vent hole 19 is closed, and a check valve 25 is opened due to a rise in the pressure P2 in a cylinder section 15 to communicate the cylinder section 15 and the space 18. When the impulse valve 20 moves downward and the pressure P2 is lowered, the check valve 22 is closed, and a negative pressure is generated in the cylinder section 15 due to the adiabatic expansion to delay the downward movement of the valve 20. By this arrangement, the impulse valve 20 moves downward separately from the piston 12 so that the closing timing can be delayed compared to the opening timing. | ||||||
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