公开(公告)号：EP1424487A2

公开(公告)日：2004-06-02

申请号：EP03027406.2

申请日：2003-11-27

申请人： Walbro Japan, Inc.

发明人： Suzuki, Masao ,  Nakata, Hiroshi B-201 Goldcrest ,  Kojima, Tetsuji

IPC分类号： F02M1/02 ,  F02M7/12 ,  F02M23/03 ,  F02B17/00 ,  F02B25/22

CPC分类号： F02M1/02 ,  F02B25/22 ,  F02B2075/025 ,  F02D2009/0279 ,  F02M7/12 ,  F02M23/03 ,  Y02T10/146 ,  Y10S261/01

摘要： A stratified scavenging carburetor (1) with a lost motion coupling (29) permits limited relative movement of a throttle valve (2) relative to an air valve (10) so that initial opening of the throttle valve (2) off idle does not open the air valve (10) to avoid diluting with scavenging air the fuel and air mixture delivered to an engine. Rotation of the throttle valve (2) beyond a predetermined amount from idle causes a corresponding opening of the air valve (10) to provide scavenging air to the engine. Closing a choke valve (12) engages a lock lever (20) with the throttle valve (2) to move the throttle valve (2) off idle to a start position without opening the air valve (10). In another embodiment, closing the choke valve (12) prevents the air valve (10) from opening even if the throttle valve (2) is moved beyond where the throttle valve (2) would cause the air valve (10) to open if the choke valve (12) were open. Thus, a richer than normal fuel and air mixture can be supplied to the engine during a choke-assisted start and warm-up of the engine.

摘要翻译： 具有空转联轴器（29）的分层扫气化油器（1）允许节流阀（2）相对于空气阀（10）的有限相对运动，使得节流阀（2）的空转初始打开不会打开 空气阀（10），以避免用清除空气稀释燃料和空气混合物输送到发动机。 节流阀（2）超过预定量的空转使空气阀（10）的相应开口向发动机提供清扫空气。 关闭阻塞阀（12）与节流阀（2）接合锁定杆（20）以将节气门（2）从空转移动到起始位置，而不打开空气阀（10）。 在另一个实施例中，即使节流阀（2）移动超过节气门（2）将导致空气阀（10）打开的空气阀（10）打开，关闭止回阀（12）也可防止空气阀（10）打开 节流阀（12）打开。 因此，在发动机的扼流器辅助启动和预热期间，可以向发动机供应比正常燃料和空气混合物更丰富的燃料和空气混合物。