FLOW RATE MEASURING DEVICE

摘要

Herein disclosed is a liquid fuel supply system for an internal combustion engine wherein a flow rate sensor is disposed in the fuel line that connects a fuel pump to the float chamber of a carburetor. The flow rate sensor includes oscillating means having a frequency of oscillation proportional to the rate of fuel flow through said fuel line, the oscillating means being in the form of a pivoted vane disposed in a cavity within said flow rate sensor which alternatively directs fuel to spaced outlet passages as the vane oscillates. A pressure accumulator is inserted in the fuel line between the pump and the flow rate sensor for damping continuous periodic pressure pulsations. The pressure accumulator comprises a chamber with a pair of compartments separated by a movable wall wherein only one compartment is connected to the fuel line and the other compartment contains a compressible means for absorbing energy due to increase in fuel pressure and releasing the energy thus absorbed during decreases in fuel pressure so as to effect said damping.