| 摘要 |
A carburetor for spark-ignition internal combustion engines, comprising a plurality of chokes formed in a body and cooperating with a shutter which is displaceable perpendicularly to the axis of the chokes and has passage openings so shaped and arranged as to uncover the chokes in sequence, so that, in the various operating conditions, all the active chokes operate at their full opening excepting only the last which may be partially shut. The result is a greater efficiency, a better combustion and a reduction of the exhaust gas pollution. In the preferred embodiment, the chokes are arranged along circle arcs, and the shutter is a rotating disc having arcuate openings, located between the body wherein the chokes are formed and an underlying distributor. The various chokes may be differently sized and provided with different nozzles in order to obtain the best metering in the various operating conditions. Also the shutter openings may be so profiled as to obtain a desired variation law of the carburetor openings.
|
