帶狀閥門結(jié)構(gòu)說明翻譯-中英對照

A shallow guide ramp 358 is formed in lower portion 328 of the valve body, having a width corresponding to the width of ribbon valve element 340. Guide ramp 358 provides a shallow ramp surface for supporting the ribbon valve element 340 as hereinafter described.

一個淺的導(dǎo)向匝道358在閥體的較低部分328形成，具有相應(yīng)帶狀閥340的寬度。導(dǎo)向匝道提供了一個淺而短的匝道面，支撐帶狀閥340，如以下描述的。

As float 346 is raised and lowered in response to fuel surge or a rollover situation, ribbon valve element 340 is correspondingly pulled up or down by control arm 348 extending from float 346. With float 346 in the fully raised position shown in FIG. 12, control arm 348 has pulled ribbon valve element 340 to the closed position in which the valve element covers and seals valve seat 334. In its lowermost position as shown in FIG. 16, float 346 has peeled valve element 340 off valve seat 334 and down onto guide ramp 358 to the open venting position.

由于浮標(biāo)3460的升降適應(yīng)燃油激增或一種轉(zhuǎn)臺情況，帶狀閥340相應(yīng)地由控制臂狀物348拉起或者降低，從浮標(biāo)3460中伸出來。浮標(biāo)3460完全升起的位置如圖12所示，控制臂狀物348把帶狀閥340拉到處于關(guān)閉的位置，在該位置閥芯涵蓋并密封了閥座334。.在圖16所示的最下位置，浮標(biāo)346已經(jīng)把閥芯340從閥座334上除去，并把導(dǎo)向匝道358下降至開口處的通風(fēng)位置。

Still referring to FIGS. 12-16, the details of the ribbon valve element and its opening structure are described as follows. The longitudinal axis of valve seat 334 is aligned with the longitudinal axis of valve element 340 as best shown in FIG. 13. From the closed position shown in FIG. 12, valve element 340 is accordingly peeled off valve seat 334 in the longitudinal direction, beginning at upper end 338 of the valve seat. The long lever arm and slot-like oval opening of vent outlet 332 and valve seat 334 create a strong mechanical advantage which peels the ribbon valve element 340 away from valve seat 334 despite pressure in the fuel tank which resists the opening of the valve.
還是參考圖12-16，帶狀閥芯的詳情以及開口通路的結(jié)構(gòu)其描述如下。.閥座334的縱軸是與閥芯340的縱軸聯(lián)在一起的，最佳顯示如圖13。從圖12所示的封閉位置來看，因此，在縱向方向上閥芯340脫離了閥座334，閥芯是以閥座的上端338開始。通風(fēng)出口332和閥座334的長.杠桿臂和槽狀橢圓形開口通路創(chuàng)建了一個較強的機械方面的優(yōu)勢， 就是把帶狀閥芯340從閥座334上脫離開來，盡管燃料箱中的壓力能抵制開啟閥芯。

Further mechanical advantage is obtained with free end 344 of ribbon valve element 344 extending beyond upper end 338 of valve seat 334. When the valve is in the closed position as shown in FIG. 1, there is a tank/canister pressure differential acting in the area of valve element 340 overlying vent outlet 332. This tank/canister pressure differential tends to hold the valve in the closed position, since tank pressure is typically greater than atmospheric canister pressure. Free end 344 of ribbon valve element 340 extending beyond upper end 338 of valve seat 334 has no pressure differential acting across it to keep it closed; i.e., free end 344 of valve element 340 has tank pressure acting on both sides. Accordingly, upper end 338 and free end 344 of the ribbon valve element define an initial pivot point and lever arm through which the float acts to initially break the seal between valve element 340 and valve seat 334. Once the seal has been initially broken by this first independent lever arm action, the valve element 340 defines a single lever arm through which opening force is applied to peel it from valve seat 334.

利用帶狀閥芯344的自由端可得到進一步的機械方面的優(yōu)勢，就是拓展超出閥座334的上端338。.當(dāng)閥芯處于關(guān)閉位置時，如圖1所示，有一個箱/罐壓差作用在閥芯340上面的排氣口332上面區(qū)域。這箱/罐壓差趨向于把閥芯保持在關(guān)閉位置，由于箱壓通常比大氣罐壓大。帶狀閥芯340的自由端自由端 自由斷 自由344拓展超出閥座334的上端338，沒有壓差使其處于關(guān)閉位置；也就是說，帶狀閥芯340的自由端344有箱壓差作用在兩側(cè)。據(jù)此, 帶狀閥芯的上端338和自由端344確定了一個初始的樞軸點和杠桿臂，浮標(biāo)利用它們最初突破了閥芯340和閥座334間的封口。一旦封口已由第一個獨立的杠桿臂被初步打破了，閥芯340界定了一個單獨杠桿臂，通過這個杠桿臂，開口力用于把杠桿臂從閥芯334上脫離開。

The opening of ribbon valve element 340 therefore comprises a two-step motion: the initial pivotal break effected by the independent lever arm motion of free end 344 of the ribbon valve element about the pivot point of upper end 338 of valve seat 334; and, the subsequent integral lever-type peeling action of the entire valve element 340. The flexible nature of valve element 340 enables it to form a tight seal with valve seat 334, as well as providing for the powerful peel away opening force. However, when in the open, relaxed position, the flexible ribbon might tend to go slack and bunch up or otherwise deform so as to affect the proper functioning the valve. Accordingly, curved guide ramp 358 serves to properly tension and support ribbon valve element 340 when the valve is in the open position. In this manner the open valve element remains unaffected by pressure changes within the valve which might otherwise tend to deform it. Liquid fuel is also prevented from collecting on the valve element should it somehow reach that level within the valve, since it simply drains off the surface of valve element 340 conforming to guide ramp 358.

2014.9.21