| 摘要 |
A rotary pump for pumping fuel for internal combustion engines in the form of a vane pump or gear and rotor pump with pumping chambers disposed circumferentially around the rotor. The chambers progressively increase in the inlet area of the pump to draw in fuel and progressively ensmall at the outlet area to discharge fuel under pressure to supply an engine. The pulsations initiated in the pump are absorbed in the pump by a closed chamber exposed to the pump outlet flow, the chamber having flexible walls and an internal pressure above atmospheric to reduce pulses in the outlet and resulting pump noise. The chamber is blow molded with an enclosed volume surrounded by flexible walls.
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