Fluid pressure regulator

摘要

A "returnless" fuel system for a motor vehicle is disclosed. A "series-pass" fuel regulator in the system includes an internal fluid passage containing a fluted pin and having a valve seat at one end. A valve ball bears against one end of the fluted pin and is biased toward the valve seat by a valve spring. The other end of the fluted pin bears against a diaphragm assembly. A main spring resists the movement the diaphragm assembly in the direction away from the fluted pin. The internal fluid passage in the regulator communicates with a chamber defined by the diaphragm assembly, the chamber further communicating with the outlet of the regulator. The inlet of the regulator communicates with the internal fluid passage when the valve ball is not seated against the valve seat and does not so communicate when the valve ball is seated against the valve seat.