無節氣門液壓控制可變氣門系統設計

本研究為了創新與傳統速克達機車的進氣氣門結構系統不同，另而設計出一種可由液壓來控制進氣氣門的一種新式結構，本結構隨著液壓的控制可做出不同氣門開度，比起傳統式的機械結構只能做單一的開度，相較起來本系統的設計可有更多的氣門開度變化。而為了達到可變氣門的成效，本設計使用液壓機構來達到可變氣門之目的。而液壓機構的液壓泵浦係經由一柱筒與柱塞兩者機件的組成配合，來達到不同液壓油量的控制，而不同的油量將是影響不同氣門開度的直接因素。液壓泵的主要構成元件，係由柱塞、柱筒、彈簧、彈簧座與液壓挺桿五大元件所組成，而液壓油經此元件將由送至液壓缸來推動氣門。而其它液壓副件如搖臂、汽缸頭、支架也都是在本論文設計涵蓋中。液壓可變氣門系統相較於原廠氣門系統不但能有效的改善36.4%引擎在起動時的指示扭力且並能改善33.6%起動時的指示功。

關鍵字

液壓控制可變氣門系統；柱塞；柱筒；液壓缸；液壓泵

並列摘要

To overcome the traditional scooter structure of intake valve system, this research designs the new structure, which valve lift is controlled by hydraulic pressure. The new structure has different valve lift, and traditional structure only has one valve lift. Therefore, this new design has multi-valve lift. In order to achieve effects on different valve lift, the hydraulic pump design is different than the pump out on the market. We can use the hydraulic pump to control the different amount of hydraulic oil by the coordination between column tube and column cork. The different amount of oil would influence valve lift directly. This study also includes the design of cam shift, cylinder head, and bypass. The main structure of hydraulic pump are plunger, column-tube, spring, spring-seat, and hydraulic-tappet. And hydraulic oil pushes the valve by this mechanism. The test results show that hydraulic-controlled variable valve system can improve 36.4% of indicated torque and 33.6% of indicated work in cranking period.