Patent ID: 7228729

Claim:
Apparatus for testing fuel flow in a return or returnless fuel system comprising at least one fuel injector for injecting fuel into the internal combustion engine of a vehicle, and a fuel pump for pumping fuel to the at least one fuel injector, said apparatus comprising a housing, a primary flow passage in the housing having an inlet adapted for connection to said fuel system for receiving fuel pumped by said fuel pump, and an outlet adapted for connection to said fuel system for flow of fuel to said at least one fuel injector, a first device for measuring a rate of fuel flow through said primary flow passage, a second device for measuring a fuel pressure in said primary flow passage, a bypass passage in the housing having an inlet adapted to communicate with said primary flow passage and an outlet adapted to communicate with a fuel receptacle, and a bypass valve in said primary flow passage downstream from said first device and movable between a first position in which the bypass passage is closed and the primary flow passage is open to permit the flow of fuel to the outlet of the primary flow passage and a second position in which the bypass passage is open and the primary flow passage is closed whereby fuel is directed through the bypass passage to the outlet of the bypass passage for transfer to said fuel receptacle, said bypass valve being movable to said first position for testing fuel flow in a return flow system and to said second position for testing fuel flow in a returnless fuel flow system.