CN110072723A - 具有高关闭高度的填充限制排气阀 - Google Patents
具有高关闭高度的填充限制排气阀 Download PDFInfo
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Abstract
本发明公开了一种用于燃料***的填充限制排气阀,所述填充限制排气阀包括外壳组件、出口端口和流动挡板。所述外壳组件具有主外壳,所述主外壳包括圆柱形主体和上部外壳部分。上部外壳部分具有限定孔口的下壁和限定上部外壳室的外圆柱形壁。出口端口形成在主外壳上并且将燃料蒸汽流体地输送出填充限制阀。孔口在远离出口端口的方向上偏离下壁的中心点。所述流动挡板从所述下壁延伸到所述上部外壳室中并且在相对的两端上连接到所述外圆柱形壁。流动挡板和上部外壳室协作以形成液体捕集器,所述液体捕集器减小了液体燃料从孔口到达出口端口的可能性。
Description
相关申请的交叉引用
本申请要求2016年11月2日提交的美国专利申请No.62/416,653和2017年2月16日提交的美国专利申请No.62/459,747的权益。上述申请的公开内容以引用方式并入本文。
技术领域
本公开整体涉及客车上的燃料箱,并且更具体地讲,涉及具有高关闭高度(SOH)和低液体携带的填充限制通气阀(FLVV)。
背景技术
车辆燃料箱可包括与燃料箱连通的FLVV。当填充燃料箱时,FLVV可允许空气和/或燃料蒸汽逸出燃料箱。FLVV在加油期间与加注喷嘴连通,以在达到预定的燃料水平时关闭来自加注喷嘴的燃料的流动。希望使预定的燃料水平对应于具有高SOH或尽可能充满的燃料箱填充水平。提供满足高SOH同时又符合低排放车辆III(LEV III)标准的FLVV可能具有挑战性。
本文所提供的背景描述是为了一般地呈现本公开的上下文的目的。当前指定的发明人的工作,在某种程度上其在本背景技术部分以及在提交时可能不具有其他资格作为现有技术的说明书的各个方面中进行描述,既不明确也不暗示地被承认为针对本公开的现有技术。
发明内容
本发明公开了一种用于具有燃料箱的燃料***的填充限制排气阀,该填充限制排气阀包括外壳组件、出口端口和流动挡板。外壳组件具有主外壳,该主外壳包括圆柱形主体和上部外壳部分。上部外壳部分具有限定孔口的下壁和限定上部外壳室的外圆柱形壁。出口端口形成在主外壳上并且将燃料蒸汽流体地输送出填充限制阀。孔口在远离出口端口的方向上偏离下壁的中心点。流动挡板从下壁延伸到上部外壳室中并且在相对的两端连接到所述外圆柱形壁。流动挡板和上部外壳室协作以形成液体捕集器,该液体捕集器减小了液体燃料从孔口到达出口端口的可能性。
根据附加特征部,出口端口包括限定端口直径的入口开口。下壁沿着与端口直径相交的平面延伸。主外壳限定第一圆筒,上部外壳限定第二圆筒。第一圆筒向上延伸到第二圆筒中,由此形成环形凸缘。流动挡板将上部外壳室分隔成孔口侧腔室和喷嘴侧腔室。流动挡板是非平面的。外壳还包括限定接纳浮子的浮子腔室的浮子引导件。
根据其他特征部,填充限制排气阀还包括连接在浮子和主外壳之间的带状物。带状物被构造成选择性地覆盖和密封孔口并阻止气流通过孔口。外壳组件还包括限定浮子引导件的桶。桶限定至少一个孔,该孔在燃料箱的内部和浮子的内部腔室之间流体连通。焊垫被构造成在组装过程期间熔化到燃料箱的内表面中,以将填充限制排气阀安装到燃料箱的内表面。覆盖件联接到上部外壳部分。覆盖件与主外壳分开形成,并且随后联接到主外壳,形成上部外壳室的上边界。
具有燃料箱的燃料***的填充限制排气阀包括外壳组件和出口端口。外壳组件具有主外壳,该主外壳包括圆柱形主体和上部外壳部分。上部外壳部分具有限定孔口的下壁和限定上部外壳室的外圆柱形壁。出口端口形成在主外壳上并且将燃料蒸汽流体地输送出填充限制排气阀。孔口在远离出口端口的方向上偏离下壁的中心点。出口端口包括限定端口直径的入口开口。下壁沿着与端口直径相交的平面延伸。
根据其他特征部,主外壳限定第一圆筒,上部外壳限定第二圆筒。第一圆筒向上延伸到第二圆筒中,由此形成环形凸缘。外壳组件还包括限定接纳浮子的浮子腔室的浮子引导件。带状物连接在浮子和主外壳之间。带状物被构造成选择性地覆盖和密封孔口并阻止气流通过孔口。
在其他特征部中,外壳组件还包括限定浮子引导件的桶。桶限定至少一个孔,该孔在燃料箱的内部和浮子的内部腔室之间流体连通。焊垫被构造成在组装过程期间熔化到燃料箱的内表面中,以将填充限制排气阀安装到燃料箱的内表面。流动挡板从下壁延伸到上部外壳室中。流动挡板在相对的两端连接到外圆柱形壁。流动挡板和上部外壳室协作以形成液体捕集器,该液体捕集器减小了液体燃料从孔口到达出口端口的可能性。流动挡板将上部外壳室分隔成孔口侧腔室和喷嘴侧腔室。孔口侧腔室具有比喷嘴侧腔室更大的体积。流动挡板以波浪状图案延伸。
附图说明
根据详细描述和附图,将更全面地理解本公开,在附图中:
图1是具有根据本公开的一个示例构建的FLVV的燃料箱***的示意图;
图2是图1中所示FLVV的透视图;
图3是图2的FLVV的侧视图;
图4是图2的FLVV的顶视图;
图5是图2的FLVV的底视图;
图6是沿图4中的线6-6截取的FLVV的剖视图;并且
图7是图2的FLVV的顶部透视图,并且该图中移除了焊垫。
具体实施方式
如本文将描述的,本公开提供了一种FLVV,其具有非常高的关闭高度,符合LEVIII燃料排放控制法规并且能够防止承载过多液体。FLVV通过焊垫内部安装到燃料箱,该焊垫熔化到具有牺牲特征部的箱壁中。该设计是模块化的,可实现多个关闭高度。
首先参考图1和图2,示出了根据本公开的一个示例构建的燃料箱***,并且通常以附图标记10标识。燃料箱***10包括通过加注管18接收并储存液体燃料14的燃料箱12。FLVV 20通过焊垫24内部安装到燃料箱12,该焊垫在组装过程期间熔化到具有牺牲特征部或肋26的燃料箱12壁中。肋26的构型仅是示例性的,并且可以使用其他几何形状。在其他示例中,肋26可以部分或全部省略。FLVV 20通过导管或蒸汽吹扫管线30流体连接到储存罐34,该储存罐通过大气空气入口管36排气。储存罐34具有与其连接的吹扫管线40,该吹扫管线适于连接到车辆发动机(未示出),以在启动期间使蒸汽通过其流过。
蒸汽再循环管线44的一端可以连接到加注管18的加注口颈48的上端。再循环管线44的相对端连接到蒸汽吹扫管线30中,用于提供流过蒸汽吹扫管线30的蒸气的一部分的再循环。通过加油期间加注口颈48中的燃料流的抽吸作用可以促进再循环。设想了其他构型。
现在另外参考图3至图7,将进一步描述FLVV 20。FLVV 20包括外壳组件50,该外壳组件具有主外壳52和由主外壳52卡扣地接纳的桶54。主外壳52包括圆柱形主体56和上部外壳部分58。桶54部分地由主外壳52的内径接纳并且具有柄脚60,该柄脚倾斜并定位到限定在主外壳52中的相应孔62中。主外壳52包括限定开口68的出口端口或喷嘴66。喷嘴66流体地连接到蒸汽吹扫管线30和蒸汽再循环管线44。
倒钩肋70围绕喷嘴66形成。支撑肋72(图3)在圆柱形主体56和喷嘴66之间延伸。焊垫24包括由限定在上部外壳部分58中的孔82接纳的柄脚80。柄脚80沿着上部外壳部分58中的表面86(图7)倾斜,然后被孔82卡扣地接纳在固定位置。成角度的连接臂90在主外壳52和上部外壳58之间延伸。上部外壳58限定了通常由下壁94和外圆柱形壁96限定的上部外壳室92(图6)。上部外壳室92由覆盖件98封闭。覆盖件98可以超声焊接或以其他方式附接到主外壳52。
外壳组件50包括接纳浮子102的浮子引导件100。具体地讲,浮子引导件100限定接纳浮子102的浮子腔室104。在一个示例中,桶54限定容纳浮子102的浮子引导件100。桶54可以限定至少一个孔110,该孔在燃料箱12的内部和浮子102的内部腔室112之间流体连通。随着燃料箱12中的液体燃料的液位上升,浮子引导件100可以引导浮子102的运动。当燃料箱12中的液体燃料液位达到预定液位时,偏置构件120可将浮子102保持在预定位置,以限制浮子102的行进程度。
上部外壳58的下壁94限定孔口130。孔口130将浮子腔室104连接到上部外壳室92。带状物150连接在浮子102和主外壳52之间。带状物150由弹性体材料诸如光硅橡胶形成。当燃料箱12中的燃料液位上升时,空气压力随着浮子102上升而移位。当浮子102上升到足够高时,带状物150覆盖并密封孔口130并阻止气流通过孔口130。带状物150还阻止液体燃料流过孔口130并在关闭位置流出喷嘴66。
上部外壳58包括从下壁94向上延伸到上部外壳室92中的流动挡板160。流动挡板160以波浪形图案延伸并且通常是非平面的。流动挡板160在相对的两端连接到外圆柱形壁96。覆盖件98通常限定上部外壳室92的上边界。流动挡板160通常将上部外壳室92分隔成孔口侧腔室166和喷嘴侧腔室168。由于覆盖件98是在组装步骤期间联接到主外壳52的单独形成的部件,因此上部外壳58的特征部(包括流动挡板160)可以在上部外壳58的形成期间一体成型。
FLVV 20的设计允许在上部外壳室92中形成液体捕集器170。液体捕集器170降低了液体燃料残留的风险。进一步说明,任何可能通过孔口130溅入或以其他方式进入上部外壳室92的液体燃料将被保留在孔口侧腔室166中,被流动挡板160阻挡而不能通过喷嘴侧腔室168,并允许通过孔口130排回。换句话说,液体捕集器170阻止液体燃料自由地穿过孔口130并通过喷嘴66的开口68流出。
将描述液体捕集器170的附加特征部。如上所述,FLVV 20允许非常高的SOH。值得注意的是,下壁94沿着与由喷嘴66的入口开口或端口182限定的端口直径180相交的平面176延伸。就这一点而言,由下壁94提供的液体捕集器170的最低点相对于入口端口182的最低点升高。换句话说,主外壳52限定第一圆筒184,而上部外壳58限定第二圆筒186。第一圆筒184向上延伸到第二圆筒186中,由此形成环形凸缘188。当第一圆筒184升高到第二圆筒186中时,可以获得更高的SOH。
此外,孔口130在远离喷嘴66的入口端口182的方向上偏离下壁94的中心点194。将孔口130移动到偏移位置允许额外的空间以结合流动挡板160,并且仍具有整合喷嘴66的入口端口182而不损害气流的空间(通过孔口130进入上部外壳室92并通过喷嘴66的入口端口182离开上部外壳室92)。
已出于说明和描述的目的提供了这些示例的上述描述。并非意图是详尽的或限制本公开。特定示例的各个元件或特征通常不限于该特定示例,而是在适用的情况下是可互换的并且可用于所选示例中,即使未具体示出或描述也是如此。其可也按许多方式进行改变。此类变型形式不应被视为脱离了本公开,并且所有此类修改形式都旨在被包括在本公开的范围内。
Claims (20)
1.一种用于具有燃料箱的燃料***的填充限制排气阀,所述填充限制排气阀包括:
外壳组件,所述外壳组件具有包括圆柱形主体和上部外壳部分的主外壳,所述上部外壳部分具有限定孔口的下壁和限定上部外壳室的外圆柱形壁;
出口端口,所述出口端口形成在所述主外壳上,所述出口端口将燃料蒸汽流体地输送出所述填充限制排气阀,所述孔口在远离所述出口端口的方向上偏离所述下壁的中心点;和
流动挡板,所述流动挡板从所述下壁延伸到所述上部外壳室中并且在相对的两端上连接到所述外圆柱形壁,所述流动挡板和所述上部外壳室协作以形成液体捕集器,所述液体捕集器减小了液体燃料从所述孔口到达所述出口端口的可能性。
2.根据权利要求1所述的填充限制排气阀,其中所述出口端口包括限定端口直径的入口开口,其中所述下壁沿着与所述端口直径相交的平面延伸。
3.根据权利要求2所述的填充限制排气阀,其中所述主外壳限定第一圆筒,并且所述上部外壳限定第二圆筒,其中所述第一圆筒向上延伸到所述第二圆筒中,由此形成环形凸缘。
4.根据权利要求2所述的填充限制排气阀,其中所述流动挡板将所述上部外壳室分隔成孔口侧腔室和喷嘴侧腔室。
5.根据权利要求4所述的填充限制排气阀,其中所述流动挡板是非平面的。
6.根据权利要求4所述的填充限制排气阀,其中所述外壳组件还包括浮子引导件,所述浮子引导件限定了接纳浮子的浮子腔室。
7.根据权利要求6所述的填充限制排气阀,还包括连接在所述浮子和所述主外壳之间的带状物,所述带状物被构造成选择性地覆盖和密封所述孔口并阻止气流通过所述孔口。
8.根据权利要求6所述的填充限制排气阀,其中所述外壳组件还包括限定所述浮子引导件的桶,所述桶限定至少一个孔,所述孔在所述燃料箱的内部与所述浮子的内部腔室之间流体连通。
9.根据权利要求1所述的填充限制排气阀,还包括焊垫,所述焊垫被构造成在组装过程期间熔化到所述燃料箱的内表面中,以将所述填充限制排气阀安装到所述燃料箱的内表面。
10.根据权利要求9所述的填充限制排气阀,还包括联接到所述上部外壳部分的覆盖件,所述覆盖件与所述主外壳单独形成,并且随后联接到所述主外壳,从而形成所述上部外壳室的上边界。
11.一种用于具有燃料箱的燃料***的填充限制排气阀,所述填充限制排气阀包括:
外壳组件,所述外壳组件具有包括圆柱形主体和上部外壳部分的主外壳,所述上部外壳部分具有限定孔口的下壁和限定上部外壳室的外圆柱形壁;
出口端口,所述出口端口形成在所述主外壳上,所述出口端口将燃料蒸汽流体地输送出所述填充限制排气阀,所述孔口在远离所述出口端口的方向上偏离所述下壁的中心点;并且
其中所述出口端口包括限定端口直径的入口开口,其中所述下壁沿着与所述端口直径相交的平面延伸。
12.根据权利要求11所述的填充限制排气阀,其中所述主外壳限定第一圆筒,并且所述上部外壳限定第二圆筒,其中所述第一圆筒向上延伸到所述第二圆筒中,由此形成环形凸缘。
13.根据权利要求11所述的填充限制排气阀,其中所述外壳组件还包括浮子引导件,所述浮子引导件限定了接纳浮子的浮子腔室。
14.根据权利要求13所述的填充限制排气阀,还包括连接在所述浮子和所述主外壳之间的带状物,所述带状物被构造成选择性地覆盖和密封所述孔口并阻止气流通过所述孔口。
15.根据权利要求13所述的填充限制排气阀,其中所述外壳组件还包括限定所述浮子引导件的桶,所述桶限定至少一个孔,所述孔在所述燃料箱的内部与所述浮子的内部腔室之间流体连通。
16.根据权利要求11所述的填充限制排气阀,还包括焊垫,所述焊垫被构造成在组装过程期间熔化到所述燃料箱的内表面中,以将所述填充限制排气阀安装到所述燃料箱的内表面。
17.根据权利要求11所述的填充限制排气阀,还包括从所述下壁延伸到所述上部外壳室中的流动挡板。
18.根据权利要求17所述的填充限制排气阀,其中所述流动挡板在相对的两端上连接到所述外圆柱形壁,所述流动挡板和所述上部外壳室协作以形成液体捕集器,所述液体捕集器减小了液体燃料从所述孔口到达所述出口端口的可能性。
19.根据权利要求17所述的填充限制排气阀,其中所述流动挡板将所述上部外壳室分隔成孔口侧腔室和喷嘴侧腔室,所述孔口侧腔室具有比所述喷嘴侧腔室更大的体积。
20.根据权利要求19所述的填充限制排气阀,其中所述流动挡板以波浪状图案延伸。
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US62/459,747 | 2017-02-16 | ||
PCT/US2017/059441 WO2018085325A1 (en) | 2016-11-02 | 2017-11-01 | Fill limit venting valve with high shut-off height |
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US20210331582A1 (en) | 2021-10-28 |
US20190255938A1 (en) | 2019-08-22 |
US11059368B2 (en) | 2021-07-13 |
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