公开(公告)号：US06481403B1

公开(公告)日：2002-11-19

申请号：US09710003

申请日：2000-11-10

申请人： Jerry J. Ashcraft ,  Jose Govea ,  Karl P. Richter ,  Randy M. Sherman

发明人： Jerry J. Ashcraft ,  Jose Govea ,  Karl P. Richter ,  Randy M. Sherman

IPC分类号： F02M116

CPC分类号： F02M17/04 ,  F02M1/08 ,  Y10S261/08

摘要： A diaphragm type carburetor which has a purge system to remove air and fuel vapor from the carburetor and to fill it with liquid fuel prior to starting an engine fed by the carburetor. The purge system has a primer valve actuated by moving a choke valve of the carburetor to its closed position to inject a small volume of liquid fuel into a throttle bore to provide a richer fuel and air mixture to the engine to facilitate starting it. Desirably, the small volume of liquid fuel is injected into the throttle bore in response to closing of the choke valve without requiring any additional steps such as depressing a button on the carburetor, to do so. Preferably, the choke valve is carried on a shaft which has at least one detent formed therein to provide a camming surface which actuates the primer valve as the choke valve is rotated from its open position to its closed position. Preferably, the choke valve shaft has a pair of detents. The primer valve is partially received by one detent when the choke valve is fully opened to close the primer valve and prevent any fluid flow therethrough. A second detent partially receives the primer valve to also close the primer valve after the choke valve has been moved to its fully closed position. The camming surface is disposed between the two detents relative to the movement of the choke valve to temporarily open the primer valve and inject the desired quantity of liquid fuel into the throttle bore to assist starting the engine when the choke valve is moved between its open and closed positions.

摘要翻译： 隔膜式化油器具有吹扫系统，以从化油器中除去空气和燃料蒸汽，并在起动由化油器供给的发动机之前用液体燃料填充。 吹扫系统具有通过将化油器的阻塞阀移动到其关闭位置而致动的底漆阀，以将少量液体燃料注入到节流孔中，以向发动机提供更丰富的燃料和空气混合物以便于启动。 理想地，响应于阻塞阀的关闭，将小体积的液体燃料注入到节流孔中，而不需要任何附加步骤，例如按下化油器上的按钮，这样做。 优选地，阻流阀被承载在具有形成在其中的至少一个制动器的轴上，以提供当阻流阀从其打开位置旋转到其关闭位置时致动底漆阀的凸轮表面。 优选地，阻风阀轴具有一对棘爪。 当止回阀完全打开时，底漆阀部分地被一个制动器接收，以关闭底漆阀并防止任何流体流过其中。 在阻塞阀已经移动到其完全关闭位置之后，第二制动器部分地接收底漆阀以还关闭底漆阀。 凸轮表面相对于阻流阀的运动设置在两个棘爪之间，以临时打开底漆阀，并将所需量的液体燃料喷射到节流孔中，以在扼流阀在其打开和关闭之间移动时帮助启动发动机 封闭职位。