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公开(公告)号：EP0424821B1
公开(公告)日：1993-11-24
申请号：EP90120109.5
申请日：1990-10-19
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公开(公告)号：EP0281771B1
公开(公告)日：1994-03-30
申请号：EP88101767.7
申请日：1988-02-05
CPC分类号： G05D7/0186 , F02M1/10 , F02M7/18 , F02M17/04 , Y10S261/38 , Y10S261/68 , Y10S261/84
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公开(公告)号：EP0424821A1
公开(公告)日：1991-05-02
申请号：EP90120109.5
申请日：1990-10-19
摘要： Method, system and apparatus for metering fuel to an internal combustion engine via a carburetor (20) having a mixture conduit with a venturi (42) therein. A main fuel nozzle (70) supplies fuel to the venturi of the carburetor in response to the static pressure drop induced across an associated main fuel flow controlling restriction (36) by the engine intake induced air flow through the carburetor mixture conduit. A pitot tube (80) is disposed in the venturi with an opening (82) facing upstream in a zone of maximum air flow through the carburetor venturi. A vent passageway (82-100) system connects the pitot tube to a single closed air chamber (62) cooperable with either a diaphragm (60) or a float to regulate operation of an inlet valve (58) controlling flow of fuel to a main fuel controlling restriction. The adverse effect of engine intake induced tuning pressure wave forms in the mixture conduit of the carburetor transitting the venturi is eliminated, reduced or modulated by the dynamic pressure exerted by said tuning waves at the pitot tube and transmitted by the vent passageway to said chamber and to said main fuel restriction.
摘要翻译： 通过其中具有文丘里管（42）的混合管道的化油器（20）向内燃机计量燃料的方法，系统和装置。 主燃料喷嘴（70）响应于通过化油器混合管道的发动机进气引起的空气流在相关联的主燃料流控制限制（36）上引起的静压力下降，向化油器的文丘里管供应燃料。 皮托管（80）设置在文丘里管中，开口（82）面向上游，通过化油器文丘里管的最大气流区域中。 排气通道（82-100）系统将皮托管连接到与隔膜（60）或浮子配合的单个封闭空气室（62），以调节进入阀（58）的操作，以控制燃料流向主体 燃料控制限制。 在通过文丘里管转化的化油器的混合管道中的发动机进气引起的调谐压力波形的不利影响被由皮托管上的所述调谐波施加的动压力减小或调节，并由排气通道传送到所述室， 说燃油主要限制。
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公开(公告)号：EP0281771A3
公开(公告)日：1989-04-19
申请号：EP88101767.7
申请日：1988-02-05
CPC分类号： G05D7/0186 , F02M1/10 , F02M7/18 , F02M17/04 , Y10S261/38 , Y10S261/68 , Y10S261/84
摘要： A temperature compensated carburetor having a fuel metering system including a variable restriction needle gate valve (42) for varying the effective flow cross-sectional area of the main and/or idle fuel supply duct to modulate the flow rate of fuel to the carburetor venturi mixing passage (16). The needle gate valve (42) is made of plastic material having a much greater coefficient of expansion than the aluminum carburetor body (12) in which it is adjustably mounted such that differential linear expansion and contraction of the needle valve (42) relative to the carburetor body (12) in response to ambient temperature changes varies the flow-controlling cross-sectional area of the fuel duct inversely relative to ambient temperature changes. The needle valve (42) is a rod-like body with a threaded cylindrical mounting portion (60) at one end threadably secured in a threaded bore in the carburetor body (12). A reduced diameter extension of the needle body extends axially away from the mounting end of the needle body and has cylindrical stem portion (70) slidable in another bore (52) of the carburetor body (12). The needle body is unrestrained linearly from the free end of the stem portion (70) to the needle body mounting portion. The free end of the stem is movable in a jet fuel feeding passageway (28, 30) of the fuel duct to thus vary the flow controlling cross-section thereof.
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公开(公告)号：EP0281771A2
公开(公告)日：1988-09-14
申请号：EP88101767.7
申请日：1988-02-05
CPC分类号： G05D7/0186 , F02M1/10 , F02M7/18 , F02M17/04 , Y10S261/38 , Y10S261/68 , Y10S261/84
摘要： A temperature compensated carburetor having a fuel metering system including a variable restriction needle gate valve (42) for varying the effective flow cross-sectional area of the main and/or idle fuel supply duct to modulate the flow rate of fuel to the carburetor venturi mixing passage (16). The needle gate valve (42) is made of plastic material having a much greater coefficient of expansion than the aluminum carburetor body (12) in which it is adjustably mounted such that differential linear expansion and contraction of the needle valve (42) relative to the carburetor body (12) in response to ambient temperature changes varies the flow-controlling cross-sectional area of the fuel duct inversely relative to ambient temperature changes. The needle valve (42) is a rod-like body with a threaded cylindrical mounting portion (60) at one end threadably secured in a threaded bore in the carburetor body (12). A reduced diameter extension of the needle body extends axially away from the mounting end of the needle body and has cylindrical stem portion (70) slidable in another bore (52) of the carburetor body (12). The needle body is unrestrained linearly from the free end of the stem portion (70) to the needle body mounting portion. The free end of the stem is movable in a jet fuel feeding passageway (28, 30) of the fuel duct to thus vary the flow controlling cross-section thereof.
摘要翻译： 一种具有燃料计量系统的温度补偿化油器，该燃料计量系统包括可变限制针阀门（42），用于改变主和/或空闲燃料供应管道的有效流动横截面面积，以调节到化油器文丘里管混合物的燃料流量 通道（16）。 针阀门（42）由具有比铝化油器主体（12）大得多的膨胀系数的塑料材料制成，其中可调节地安装有铝化油器主体（12），使得针阀（42）相对于 响应于环境温度变化的化油器主体（12）相对于环境温度变化逆向改变燃料管道的流量控制横截面积。 针阀（42）是一个带螺纹圆柱形安装部分（60）的杆状体，其一端螺纹固定在化油器主体（12）的螺纹孔中。 针体的直径减小的延伸部沿轴向从针体的安装端轴向延伸并且具有可在化油器主体（12）的另一个孔（52）中滑动的圆柱形杆部分（70）。 针体从杆部（70）的自由端到针体安装部分线性地不受约束。 杆的自由端可在燃料管道的喷气燃料供给通道（28,30）中移动，从而改变其流动控制横截面。
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