Patent ID: 8703358

Claim:
A fuel feed system for a fuel cell, the fuel feed system comprising: a pump receiving fuel at an input to said pump; said fuel originating from a reservoir; a flow sensor operatively connected to an output of said pump; said flow sensor receiving fuel from said pump; an output from said flow sensor being indicative of flow rate in said pump; said output being provided to a controller; a driver for the pump being under control of the controller; a valve operatively connected to said flow sensor; said valve receiving fuel from said flow sensor; said valve comprising a pressure inlet port operatively connected to said input of said pump, said pressure inlet port providing an exerted pressure; said exerted pressure being substantially equivalent to an input pressure of said pump; said valve allowing fluid flow from an output of said pump to the fuel cell when an output pressure of said pump exceeds a predetermined pressure, said predetermined pressure including said exerted pressure; a flow restriction component operatively connected to an output of said pump; and a differential pressure sensor connected across said flow restriction component; an output from said differential pressure sensor being indicative of flow rate in said pump; said output being provided to the controller.