| 摘要 |
<p>A carburetion system for an internal combustion engine having improved fuel metering is disclosed and includes a fuel supply conduit which is formed in a portion of the body of the carburetor extending from a fuel source to the carburetor bore with that carburetor body portion having a first linear temperature coefficient of expansion. A mixture control member formed of a material having a second linear temperature coefficient of expansion engages the body in a first region and defines relative to the carburetor body in a second remote region a fuel metering orifice for controlling fuel flow through the fuel supply conduit. The mixture control member may be moved relative to the first and second regions to change the fuel to air ratio supplied to the engine. Employing a fuel metering orifice in the adjustable fuel metering arrangement, the minimum flow area of which has a simply connected convex cross sectional configuration, minimizes the adverse effects of ambient temperature changes. The carburetor includes a one-way check valve in series between a fuel source and a fuel discharge nozzle comprising a valve housing having a fuel inlet coupled to the fuel source and a fuel outlet coupled to the discharge nozzle with a valve ball captive within the housing and movable between a closed position adjacent to the fuel inlet and an open position laterally displaced relative to the path of fuel flow through the valve housing.</p> |
