Daniel Darrell Mc

US Patent:

7028671, Apr 18, 2006

Filed:

Aug 20, 2004

Appl. No.:

10/923422

Inventors:

Daniel H. Mc Clure - Rochester Hills MI, US
Jon E. Johnson - Fenton MI, US
Todd M. Niedecken - Burt MI, US

Assignee:

General Motors Corporations - Detroit MI

International Classification:

F02M 37/04

US Classification:

123514, 137255

Abstract:

A fuel return system for returning fuel from a fuel pump to first and second fuel tanks in an automotive vehicle includes an open T fitting having branches connected through couplings to the first and second fuel tanks. The couplings each have a low return, fuel flow orifice which is continually open and a high return, fuel flow orifice which is normally closed by a valve. The low pass through orifices prevent one tank from receiving extra fuel during idle and allow the first and second fuel tanks to siphon to the same fuel level when the vehicle is parked. The high flow through orifices open to prevent return fuel back pressure to the engine and have a cracking pressure responsive to the engine running at a level higher than idle.