公开(公告)号：EP1026391A2

公开(公告)日：2000-08-09

申请号：EP00101897.7

申请日：2000-01-31

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko ,  Ohgane, Shin-Ichi ,  Aihara, Tamio

IPC分类号： F02M23/04

CPC分类号： F02M9/02 ,  F02B17/00 ,  F02B2075/025 ,  F02M23/04 ,  Y02T10/146 ,  Y10S261/01

摘要： A carburetor for a stratified type scavenging engine has a scavenging air supply passage with an air valve therein, a fuel and air mixture passage having a throttle valve therein, a diaphragm which defines a negative pressure chamber on one side and an atmospheric chamber on its other side, and a low pressure passage that communicates a venturi portion of the fuel and air mixing passage with the negative pressure chamber. The air valve is responsive to movement of the diaphragm caused by the pressure differential across it to move the air valve between open and closed positions and a spring yieldably biases the air valve towards its closed position. The air valve is not directly mechanically connected or linked to the throttle valve. Thus, when the throttle valve is rapidly opened during engine acceleration, the air valve is not immediately rapidly opened and is not significantly opened until a sufficient pressure differential exists across the diaphragm. Therefore, during initial rapid acceleration of the engine from idle, the air valve prevents a significant flow of scavenging air to the engine to ensure a sufficiently rich fuel and air mixture is supplied to the engine to support the rapid acceleration.

摘要翻译： 用于分层式清扫发动机的化油器具有在其中具有空气阀的扫气供气通道，其中具有节流阀的燃料和空气混合通道，在一侧限定负压室和在其一侧限定大气室的隔膜 以及将燃料和空气混合通道的文丘里部分与负压室连通的低压通道。 空气阀响应于隔膜之间的压差引起的隔膜的运动，以使空气阀在打开和关闭位置之间移动，并且弹簧可靠地将空气阀偏压到其关闭位置。 空气阀不直接机械连接或连接到节流阀。 因此，当在发动机加速期间节流阀快速打开时，空气阀不会立即快速打开，并且在隔膜之间存在足够的压力差时不显着打开。 因此，在发动机从怠速初始快速加速期间，空气阀防止清除空气到发动机的大量流动，以确保足够丰富的燃料和空气混合物被供应到发动机以支持快速加速。

公开(公告)号：EP1026390A2

公开(公告)日：2000-08-09

申请号：EP00101896.9

申请日：2000-01-31

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko ,  Ohgane, Shin-ichi

IPC分类号： F02M23/04

CPC分类号： F02M23/03 ,  F02M17/00 ,  F02M23/02 ,  Y02T10/146 ,  Y10S261/01

摘要： A carburetor for a two stroke engine according to the invention comprises an air passage and a separate fuel and air mixing passage in a carburetor body and having an air valve and a throttle valve, respectively. A coupling connects a valve shaft of the air valve with a valve shaft of the throttle valve and has an area wherein the valves are rotatable relative to each other corresponding to a difference between an opening and closing angle of the air valve and an opening and closing angle of the throttle valve. Preferably, when the throttle valve is in an idle position, the air valve is closed and the throttle valve can be opened through at least some angle from its idle position before the air valve is moved from its closed position. Also, the air valve is preferably fully opened when the throttle valve is moved to its fully or wide open position. Thus, at idle operation of the engine, the air valve is closed to prevent a scavenging air supply from being provided to the engine to avoid an overly lean fuel air and mixture in the engine. When the engine is moved sufficiently off idle, the air valve is opened to supply the scavenging air supply to the engine which facilitates removal of exhaust gases and reduces the escape of a fresh fuel and air mixture through the engine exhaust ports.

摘要翻译： 根据本发明的用于二冲程发动机的化油器在气化器主体中分别包括空气通道和单独的燃料和空气混合通道，并且分别具有空气阀和节流阀。 联接器将空气阀的阀轴与节流阀的阀轴连接，并且具有这样的区域，其中阀可以相对于空气阀的打开和关闭角度的开度和开度之间的差异而相对于彼此旋转 节流阀的角度。 优选地，当节气门处于空闲位置时，空气阀关闭，并且在空气阀从其关闭位置移动之前，节气门可以从其空转位置开始至少一定角度。 此外，当节流阀移动到其完全或大的打开位置时，空气阀优选地完全打开。 因此，在发动机的怠速运转时，空气阀关闭，以防止向发动机提供清扫空气供应，以避免发动机中过度稀薄的燃料空气和混合物。 当发动机足够地怠速运转时，空气阀打开以向发动机提供清扫空气供给，其有助于排出废气，并且减少新鲜燃料和空气混合物通过发动机排气口的逸出。

公开(公告)号：EP1369574A3

公开(公告)日：2004-04-07

申请号：EP03012627.0

申请日：2003-06-03

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko

IPC分类号： F02M9/08

CPC分类号： F02M9/085

摘要： A rotary throttle valve carburetor includes an air intake passage (51) and a throttle valve bore formed in a carburetor body (14), a cam (22) disposed in the throttle valve bore, and a throttle valve (15) disposed in the throttle valve bore so that one end engages the cam (22) and the other end is accessible from outside the throttle valve bore for operable connection to a throttle valve lever (8). The carburetor may also have a cable holder (80) with a receiving cylinder (81) for an outer tube (91) of a throttle valve lever cable, an insert port for an inner wire of the cable and a slot between the receiving cylinder and insert port. The slit is smaller than an end of the inner wire to prevent that end from passing through the slit. The carburetor may further include a tamper resistant fuel adjustment bolt including an anti-turning body keyed to the carburetor body and splined to the adjustment bolt after calibration of the carburetor to prevent inadvertent rotation, or user tampering with the calibrated setting.

摘要翻译： 旋转节流阀化油器包括形成在化油器主体（14）中的进气通道（51）和节气门孔，设置在节流阀孔中的凸轮（22）和设置在节流阀 阀孔，使得一端接合凸轮（22），另一端可从节流阀孔的外部接近，以便可操作地连接到节流阀杆（8）。 化油器还可以具有电缆固定器（80），其具有用于节流阀杆电缆的外管（91）的接收缸（81），用于电缆内线的插入口和在接收缸和 插入端口。 狭缝比内线的端部小，以防止该端部通过狭缝。 化油器可以进一步包括防篡改燃料调节螺栓，其包括在校准化油器之后键合到化油器主体并花键到调节螺栓的防转动体，以防止意外旋转，或者用户篡改校准的设置。

公开(公告)号：EP1369574A2

公开(公告)日：2003-12-10

申请号：EP03012627.0

申请日：2003-06-03

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko

IPC分类号： F02M9/08

CPC分类号： F02M9/085

摘要： A rotary throttle valve carburetor includes an air intake passage (51) and a throttle valve bore formed in a carburetor body (14), a cam (22) disposed in the throttle valve bore, and a throttle valve (15) disposed in the throttle valve bore so that one end engages the cam (22) and the other end is accessible from outside the throttle valve bore for operable connection to a throttle valve lever (8). The carburetor may also have a cable holder (80) with a receiving cylinder (81) for an outer tube (91) of a throttle valve lever cable, an insert port for an inner wire of the cable and a slot between the receiving cylinder and insert port. The slit is smaller than an end of the inner wire to prevent that end from passing through the slit. The carburetor may further include a tamper resistant fuel adjustment bolt including an anti-turning body keyed to the carburetor body and splined to the adjustment bolt after calibration of the carburetor to prevent inadvertent rotation, or user tampering with the calibrated setting.

公开(公告)号：EP0705969B1

公开(公告)日：1999-11-10

申请号：EP95113761.1

申请日：1995-09-01

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko

IPC分类号： F02M9/08

CPC分类号： F02M9/085 ,  Y10S261/08 ,  Y10S261/68

公开(公告)号：EP1026390B1

公开(公告)日：2005-03-23

申请号：EP00101896.9

申请日：2000-01-31

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko ,  Ohgane, Shin-ichi

IPC分类号： F02M23/04 ,  F02M23/03

CPC分类号： F02M23/03 ,  F02M17/00 ,  F02M23/02 ,  Y02T10/146 ,  Y10S261/01

公开(公告)号：EP1378653A2

公开(公告)日：2004-01-07

申请号：EP03015102.1

申请日：2003-07-03

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko

IPC分类号： F02M23/03

CPC分类号： F02M23/03 ,  F02B25/22 ,  F02B33/02 ,  F02B2075/025 ,  Y02T10/146

摘要： A stratified scavenging mechanism of a two-stroke internal combustion engine including a carburetor for supplying and controlling an air and fuel mixture to the engine, an air intake passage (2) in which a throttle valve (4) is disposed, an air passage provided on a scavenging air supply body (24), an air control valve (29) disposed in the air passage for opening and closing the air passage, and an air valve lever (32) operably connected to a throttle valve lever (10). The scavenging air supply body (24) is carried by the carburetor. More than one air passage may be provided, and a separate air control valve is preferably provided for each air passage.

摘要翻译： 一种二冲程内燃机的分层扫气机构，其包括用于向发动机供应和控制空气和燃料混合物的化油器，其中设置有节气门（4）的进气通道（2），提供的空气通道 在扫气用供气体（24）上设置有用于开闭上述空气通路的配置于上述空气通路内的空气控制阀（29）以及与节气门杆（10）连接的空气阀杆（32）。 扫气用供气体（24）由化油器携带。 可以提供多于一个的空气通道，并且优选为每个空气通道设置单独的空气控制阀。

公开(公告)号：EP1063410A3

公开(公告)日：2001-08-22

申请号：EP00112893.3

申请日：2000-06-19

申请人： Walbro Japan, Inc.

发明人： Terakado, Hitoshi ,  Ohgane, Shinchi ,  Tobinai, Teruhiko

IPC分类号： F02M9/08

CPC分类号： F02M19/12 ,  F02D9/10 ,  F02D11/02 ,  F02D2009/0261 ,  F02M9/08

摘要： A throttle valve lever for controlling the rate of fuel flow in a rotary throttle valve type carburetor is proposed, wherein the throttle valve lever has increased stiffness to help prevent structural deformation due to excessive force exerted and applied to the lever over time. The throttle valve lever basically includes an oblong structure comprising synthetic resin and an oblong reinforcement plate comprising metal. The resin structure has a hole defined therethrough, which is capable of fitting around the shaft of a throttle valve of a carburetor, and also has a lever portion at one end of the resin structure. The metal plate has a hole defined therethrough, which is capable of fitting around the shaft of a throttle valve of a carburetor, and also has a lever portion at one end of the metal plate. The metal plate is embedded within the resin structure such that the lever portion of the resin structure and the lever portion of the metal plate are correspondingly situated, the hole of the resin structure and the hole of the metal plate are aligned, and the metal plate is exposed at the metal plate hole and is capable of direct and fitted contact with the throttle valve shaft.

公开(公告)号：EP1026390A3

公开(公告)日：2001-01-17

申请号：EP00101896.9

申请日：2000-01-31

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko ,  Ohgane, Shin-ichi

IPC分类号： F02M23/04 ,  F02M23/03

CPC分类号： F02M23/03 ,  F02M17/00 ,  F02M23/02 ,  Y02T10/146 ,  Y10S261/01

摘要： A carburetor for a two stroke engine according to the invention comprises an air passage and a separate fuel and air mixing passage in a carburetor body and having an air valve and a throttle valve, respectively. A coupling connects a valve shaft of the air valve with a valve shaft of the throttle valve and has an area wherein the valves are rotatable relative to each other corresponding to a difference between an opening and closing angle of the air valve and an opening and closing angle of the throttle valve. Preferably, when the throttle valve is in an idle position, the air valve is closed and the throttle valve can be opened through at least some angle from its idle position before the air valve is moved from its closed position. Also, the air valve is preferably fully opened when the throttle valve is moved to its fully or wide open position. Thus, at idle operation of the engine, the air valve is closed to prevent a scavenging air supply from being provided to the engine to avoid an overly lean fuel air and mixture in the engine. When the engine is moved sufficiently off idle, the air valve is opened to supply the scavenging air supply to the engine which facilitates removal of exhaust gases and reduces the escape of a fresh fuel and air mixture through the engine exhaust ports.

公开(公告)号：EP0705969A1

公开(公告)日：1996-04-10

申请号：EP95113761.1

申请日：1995-09-01

申请人： Walbro Japan, Inc.

发明人： Tobinai, Teruhiko

IPC分类号： F02M9/08

CPC分类号： F02M9/085 ,  Y10S261/08 ,  Y10S261/68

摘要： A construction of a fuel supply pipe (16) with a proximal end press-fit portion (84) formed of metal and a metering tip portion (81) formed of synthetic resin. The metering tip portion (81), formed with a fuel jet (16a) therein, is telescopically connected to the proximal end press-fit portion (84) of the fuel supply pipe (16) to provide a stable fuel supply in a rotary throttle valve type carburetor.

摘要翻译： 具有由金属形成的近端压入部（84）和由合成树脂形成的计量端部（81）的燃料供给管（16）的结构。 在其中形成有燃料喷射（16a）的计量尖端部分（81）可伸缩地连接到燃料供应管（16）的近端压配合部分（84），以在旋转节流阀中提供稳定的燃料供应 阀式化油器