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1. 发明公开

EP1302652A2 Fuel regulating mechanism and method for a rotary throttle valve type carburetor 审中-公开
标题翻译： Brennstoffsteuerungsvorrichtung und Methodefüreinen Drehschiebervergaser
公开(公告)号：EP1302652A2
公开(公告)日：2003-04-16
申请号：EP02022130.5
申请日：2002-10-02
申请人： WALBRO CORPORATION
发明人： Pattullo, George M.
IPC分类号： F02M9/08
CPC分类号： F02M9/08 , F02M17/04
摘要： Method of and mechanism for regulating fuel feed from a rotary valve type carburetor to an associated engine. A carburetor bypass air passage variably communicates the throttle valve hole with a bypass air source at engine idle setting of the throttle valve. The bypass air passage outlet is closed by movement of the throttle valve out of idle setting toward high speed. At an initial carburetor-to-engine set-up and calibration, a bypass regulating valve is maintained open while the engine is running at idle speed. Then the fuel-regulating needle is adjusted to maximum fuel to air (F/A) mixture ratio permitted by applicable engine exhaust quality regulations, and then is permanently set and sealed. During subsequent end user operation of the engine, the bypass valve is closed only when preparing to crank the engine for starting to thereby provide an enriched fuel-to-air mixture for starting of the engine. When the engine is running under its own power the bypass valve is maintained open. The bypass branch passage outlet is constructed and arranged relative to travel of the upstream control edge of the throttle valve hole so as to modulate by design the fuel flow versus engine speed during part throttle acceleration due to corresponding travel of the control edge past this bypass outlet.
摘要翻译：用于调节从旋转阀式化油器到相关发动机的燃料供给的方法和机构。化油器旁通空气通道在节气门的发动机怠速设定下可变地将节气门孔与旁路空气源连通。旁通空气通道出口通过节流阀的运动从空转设置向高速运动而关闭。在初始化油器到发动机的安装和校准时，在发动机以怠速运转时，旁路调节阀保持打开。然后根据适用的发动机排气质量规定调节燃油调节针至最大燃油与空气（F / A）混合比，然后永久设定和密封。在随后的发动机最终用户操作期间，只有在准备起动起动发动机从而为发动机起动提供富集的燃油对空气混合物时，旁通阀才关闭。当发动机在自己的动力下运行时，旁通阀保持打开。旁路分支通道出口被构造和布置成相对于节流阀孔的上游控制边缘的行进，以便通过设计调节部分节气门加速期间的燃料流量与发动机转速的关系，这是由于控制边缘经过该旁路出口。

2. 发明公开

EP1236882A2 Carburetor valve rotational setting retainer assembly 审中-公开
标题翻译： Vergaserventils Halteanordnungfürdie Drehlage eines
公开(公告)号：EP1236882A2
公开(公告)日：2002-09-04
申请号：EP02002888.2
申请日：2002-02-08
申请人： WALBRO CORPORATION
发明人： Burns, Michael P. , Gliniecki, Gary U. , Pattullo, George M. , van Allen, James E.
IPC分类号： F02M19/04
CPC分类号： F02M3/10 , F02M19/04 , F02M2003/105 , Y10S261/38 , Y10S261/84 , Y10T137/7062
摘要： A fuel needle valve assembly of a carburetor has a retainer which yieldingly restrains the rotational fuel flow setting capability of the needle valve. The retainer engages a shank of the needle valve and a parallel shaft, both of which project from the carburetor body. The retainer exerts a force which laterally displaces the projecting shank with respect to the shaft. The retainer has sufficient strength to ensure the factory set rotational setting of the fuel needle valve does not alter when a limiter cap is press fitted to a distal head of the needle. Furthermore, wherein the shaft is also a shank of a second needle valve, the same retainer laterally displaces the projecting shanks of both needle valves.
摘要翻译：化油器的燃料针阀组件具有能够有效地抑制针阀的旋转燃料流量设定能力的保持器。保持器接合针阀的柄和平行的轴，两者都从化油器体突出。保持器施加使突出柄相对于轴横向移位的力。保持器具有足够的强度，以确保当将限制器盖压配合到针的远端头部时，燃料针阀的出厂设置旋转设置不会改变。此外，其中轴还是第二针阀的柄，相同的保持器横向移位两个针阀的突出的杆。

3. 发明公开

EP1116873A2 Fuel and air purge system for diaphragm carburetors 审中-公开
标题翻译：化油器燃油和排气系统
公开(公告)号：EP1116873A2
公开(公告)日：2001-07-18
申请号：EP01100447.0
申请日：2001-01-08
申请人： WALBRO CORPORATION
发明人： Pattullo, George M.
IPC分类号： F02M17/04
CPC分类号： F02M17/04 , F02M37/20
摘要： A method of reducing gaseous phase presence in the liquid fuel metering chamber of a diaphragm by providing a "High-Point Pick Up" hole positioned in the optimal metering chamber location (highest) to assure maximum purge evacuation of air and/or other gases prior to engine start-up and during running. This optimal location is dependent upon first determining, in advance of carburetor fuel feed circuitry and/or air purge system design, the orientation of the carburetor as mounted on the engine in its primary operator usage position, or so-called "standard operating position" (SOP). This SOP in turn is determined in the first instance by the engine manufacturer and/or the manufacturer of the portable engine-driven handheld appliance on which the engine is mounted. In one embodiment the two typical fluid circuits (air purge and normal idle/high speed fuel feed circuits) share a common, sole take-off inlet opening into the metering chamber, the same being located at the highest elevation point in the metering chamber in the given SOP orientation. This assures that the maximum amount of air and/or fuel vapor is removed from the metering chamber during purging prior to start-up and during running. In accordance with the invention, the primary usage position (SOP orientation) of the engine is determined and becomes a known use parameter prior to the carburetor manufacturer determining such take-off hole location. Both butterfly valve cubic carburetor and rotary valve carburetor embodiments are disclosed embodying the invention.

4. 发明公开

EP1162361A3 Carburetor with diaphragm type fuel pump 有权
标题翻译：化油器用膜片燃油泵
公开(公告)号：EP1162361A3
公开(公告)日：2003-07-09
申请号：EP01113749.4
申请日：2001-06-05
申请人： WALBRO CORPORATION
发明人： Pattullo, George M. , Schmidt, Thomas L.
IPC分类号： F02M17/04 , F02M37/04
CPC分类号： F02M17/04 , Y10S261/68
摘要： For a four-stroke engine, a carburetor with a fuel pump diaphragm which defines a fuel pump chamber on one side and a pressure pulse chamber on its other side in communication with the engine to receive pressure pulses which actuate the fuel pump diaphragm to draw fuel into the carburetor and to discharge fuel under pressure to a downstream fuel metering assembly. An air passage communicates an air supply with the pressure pulse chamber to provide an air flow within the pressure pulse chamber which sweeps away, dries out or aerates and removes any liquid fuel within the pressure pulse chamber to avoid puddling of liquid fuel therein. In one form, a throttle valve carried by the carburetor body for movement between idle and wide open positions also actuates a valve which controls the flow of fluid through the air passage as a function of the position of the throttle valve.

5. 发明授权

EP1162361B1 Carburetor with diaphragm type fuel pump 有权
标题翻译：化油器用膜片燃油泵
公开(公告)号：EP1162361B1
公开(公告)日：2004-08-25
申请号：EP01113749.4
申请日：2001-06-05
申请人： WALBRO CORPORATION
发明人： Pattullo, George M. , Schmidt, Thomas L.
IPC分类号： F02M17/04 , F02M37/04
CPC分类号： F02M17/04 , Y10S261/68

6. 发明公开

EP1236882A3 Carburetor valve rotational setting retainer assembly 审中-公开
标题翻译：保持装置用于化油器阀的旋转位置
公开(公告)号：EP1236882A3
公开(公告)日：2004-01-21
申请号：EP02002888.2
申请日：2002-02-08
申请人： WALBRO CORPORATION
发明人： Burns, Michael P. , Gliniecki, Gary U. , Pattullo, George M. , van Allen, James E.
IPC分类号： F02M19/04 , F02M3/10 , F02B63/02
CPC分类号： F02M3/10 , F02M19/04 , F02M2003/105 , Y10S261/38 , Y10S261/84 , Y10T137/7062
摘要： A fuel needle valve assembly of a carburetor has a retainer which yieldingly restrains the rotational fuel flow setting capability of the needle valve. The retainer engages a shank of the needle valve and a parallel shaft, both of which project from the carburetor body. The retainer exerts a force which laterally displaces the projecting shank with respect to the shaft. The retainer has sufficient strength to ensure the factory set rotational setting of the fuel needle valve does not alter when a limiter cap is press fitted to a distal head of the needle. Furthermore, wherein the shaft is also a shank of a second needle valve, the same retainer laterally displaces the projecting shanks of both needle valves.

7. 发明公开

EP0589405A1 Carburettor needle valve adjustment limiter cap 失效
标题翻译： Koppe zur Begrenzung derEinstellmöglichkeiteiner Einstellnadel eines Vergasers。
公开(公告)号：EP0589405A1
公开(公告)日：1994-03-30
申请号：EP93115159.1
申请日：1993-09-20
申请人： WALBRO CORPORATION
发明人： Hammett, Steven L. , Pattullo, George M. , Ross, Donald C. , Speirs, David L. , Swanson, Mark S. , Van Allen, James E.
IPC分类号： F02M3/10 , F16B41/00
CPC分类号： F02B63/02 , F02B1/04 , F02B2075/025 , F02M3/10 , F02M2003/105 , F05C2201/021 , F16B37/14 , F16B41/005
摘要： A cap (40) and method for limiting the range of adjustment of a fuel flow metering valve (36) in a carburetor. The cap (40) has a body (82) with an arm (84) projecting generally radially outwardly therefrom to abut against a stop carried by the carburetor to limit valve rotation and a passage (86) therein for telescopically axially receiving the head end (62) of a shank (60) of the valve (36). Portions within the passage (86) enable the cap (40) to be retained in the shank (60) of the valve (36) in a freely rotating first position during assembly and arm orientation, and in a second position securing the cap (40) to the valve (36) to limit adjustment and maintain emissions calibration. Preferably, the cap (40) may also be moved to a third position to releasably drivingly engage the valve (36) to perform fuel flow adjustment before securing the cap (40) to the valve (36). The cap (40) can also be prepositioned angularly relative to an adjusted position of the valve (36) before it is moved to its second position on the valve (36) to limit the extent of subsequent adjustment of the valve (36).
摘要翻译：一种用于限制化油器中燃料流量计量阀（36）的调节范围的盖（40）和方法。盖（40）具有主体（82），臂（84）大致径向向外突出，以抵靠由化油器承载的止挡件以限制阀旋转，并且其中的通道（86）用于可伸缩地轴向地接收头端部阀（36）的柄（60）的一端（62）。通道（86）内的部分使盖帽（40）能够在组装和臂定向期间以自由旋转的第一位置保持在阀（36）的柄部（60）中，并且在固定盖（40）的第二位置）到阀（36）以限制调节并维持排放校准。优选地，盖（40）也可以移动到第三位置以可释放地驱动地接合阀（36），以在将盖（40）固定到阀（36）之前进行燃料流调节。在阀（36）移动到其在阀（36）上的第二位置之前，盖（40）也可以相对于阀（36）的调节位置成角度地预定位，以限制阀（36）的后续调节的程度。

8. 发明公开

EP1277944A1 Carburetor vent control 审中-公开
标题翻译： StegerentlüftungfürVergaser
公开(公告)号：EP1277944A1
公开(公告)日：2003-01-22
申请号：EP02015084.3
申请日：2002-07-05
申请人： WALBRO CORPORATION
发明人： Burns, Michael P. , Pattullo, George M.
IPC分类号： F02M1/04 , F02M3/12
CPC分类号： F02M1/04 , F02M3/12
摘要： A carburetor preferably of a diaphragm type for an internal combustion engine has a low speed circuit (72) for starting and idling of a cold engine. An air bleed line (82) of the low speed circuit communicates between an inlet of a fuel and air mixing passage (12) of the carburetor and an emulsifying chamber (74) of the low speed circuit. Fuel flows to the emulsifying chamber from a fuel metering chamber (44) and is regulated by a low speed idling adjustment needle screw (25). The bleed air and the fuel mixes within the emulsifying chamber and flows into the mixing passage between the throttle valve and the outlet of the mixing passage. Promoting this flow is a high vacuum produced by cranking and idling of the engine and accentuated by the substantially closed throttle valve. The fuel-and-air mixture is rich during cold idling as a result of the closed air bleed line. When the engine warms up, the air bleed line is opened via the restrictor valve.
摘要翻译：优选用于内燃机的隔膜式的化油器具有用于启动和冷却发动机的空转的低速回路（72）。低速回路的排气管线（82）在燃料的入口与化油器的空气混合通道（12）和低速回路的乳化室（74）之间连通。燃料从燃料计量室（44）流到乳化室，并由低速空转调节针螺丝（25）调节。排出空气和燃料在乳化室内混合并流入节流阀和混合通道出口之间的混合通道。促进这种流动是由发动机的起动和空转产生的高真空，并且通过基本上闭合的节流阀来加强。由于封闭的排气管道，燃料和空气混合物在冷空闲期间是丰富的。当发动机加热时，排气管路通过限流阀打开。

9. 发明公开

EP1162361A2 Carburetor with diaphragm type fuel pump 有权
标题翻译： Vergaser mit Membranbrennstoffpumpe
公开(公告)号：EP1162361A2
公开(公告)日：2001-12-12
申请号：EP01113749.4
申请日：2001-06-05
申请人： WALBRO CORPORATION
发明人： Pattullo, George M. , Schmidt, Thomas L.
IPC分类号： F02M17/04
CPC分类号： F02M17/04 , Y10S261/68
摘要： For a four-stroke engine, a carburetor with a fuel pump diaphragm which defines a fuel pump chamber on one side and a pressure pulse chamber on its other side in communication with the engine to receive pressure pulses which actuate the fuel pump diaphragm to draw fuel into the carburetor and to discharge fuel under pressure to a downstream fuel metering assembly. An air passage communicates an air supply with the pressure pulse chamber to provide an air flow within the pressure pulse chamber which sweeps away, dries out or aerates and removes any liquid fuel within the pressure pulse chamber to avoid puddling of liquid fuel therein. In one form, a throttle valve carried by the carburetor body for movement between idle and wide open positions also actuates a valve which controls the flow of fluid through the air passage as a function of the position of the throttle valve.
摘要翻译：对于四冲程发动机，具有燃料泵隔膜的化油器，其在一侧限定燃料泵室，并且在另一侧限定与发动机连通的压力脉冲室，以接收致动燃料泵隔膜以抽吸燃料的压力脉冲进入化油器并在压力下将燃料排放到下游燃料计量组件。空气通道将空气供应与压力脉冲室连通，以在压力脉冲室内提供空气流，该空气流扫过，干燥或通气并且去除压力脉冲室内的任何液体燃料，以避免液体燃料在其中的搅动。在一种形式中，由化油器主体承载的用于在空转位置和大开位置之间移动的节气门阀还致动阀，该阀门根据节流阀的位置来驱动通过空气通道的流体流动。

10. 发明授权

EP0589405B1 Carburettor needle valve adjustment limiter cap 失效
标题翻译：化油器针阀调整限制器帽
公开(公告)号：EP0589405B1
公开(公告)日：1997-07-09
申请号：EP93115159.1
申请日：1993-09-20
申请人： WALBRO CORPORATION
发明人： Hammett, Steven L. , Pattullo, George M. , Ross, Donald C. , Speirs, David L. , Swanson, Mark S. , Van Allen, James E.
IPC分类号： F02M3/10 , F16B41/00
CPC分类号： F02B63/02 , F02B1/04 , F02B2075/025 , F02M3/10 , F02M2003/105 , F05C2201/021 , F16B37/14 , F16B41/005

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