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1. 发明公开

EP1026390A2 Carburetor for two stroke engine 有权
标题翻译： VergaserfürZweitaktbrennkraftmaschine
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。

2. 发明授权

EP1026390B1 Carburetor for two stroke engine 有权
标题翻译：化油器二冲程内燃机
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

3. 发明公开

EP1026390A3 Carburetor for two stroke engine 有权
标题翻译：化油器二冲程内燃机
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.

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