| 摘要 |
A fuel supply apparatus for an internal combustion engine in which fuel is supplied to the air induction tube in proportion to the aspirated air flow rate. A fuel metering valve, which may be electromagnetically actuated on the basis of engine rpm and other variables, is connected to the induction tube, possibly into the bypass channel of a carburetor to provide fine fuel control. Between the fuel metering valve and the induction tube there is disposed a pneumatic valve assembly including an equal pressure valve, the pressure chamber of which controls the fuel flow and the control chamber of which is coupled to the pressure chamber of a further, differentially-biased pressure control valve connected to downstream portions of the induction tube. The differential pressure valve maintains the control pressure in the equal pressure valve.
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