US 6,981,491 B2
Coupling valve structure for fuel supply module
Jochen Schmitt, Langen (Germany); Holger Dilchert, Frankfurt (Germany); Michael Teichert, Schwalbach/Taunus (Germany); and Andreas Bernert, Bad Homburg (Germany)
Assigned to Siemens VDO Automotive Corporation, Auburn Hills, Mich. (US)
Filed on Dec. 16, 2004, as Appl. No. 11/14,650.
Claims priority of provisional application 60/540541, filed on Jan. 30, 2004.
Prior Publication US 2005/0166902 A1, Aug. 04, 2005
Int. Cl. F02M 37/04 (2006.01)
U.S. Cl. 123—514 18 Claims
OG exemplary drawing
 
1. A structure for a fuel supply module, the module having a fuel pump disposed in a fuel reservoir, a feed line in fluid communication with an outlet of the fuel pump for feeding fuel to an engine, and a return line for returning excess fuel from the engine to the reservoir, the structure comprising:
a generally H-shaped body having first and second legs joined by a conduit, the first leg being in fluid communication the feed line and the second leg being in fluid communication with the return line.
a check valve disposed within the first leg and constructed and arranged to permit fuel to be delivered to the engine and to prevent the fuel from draining back to the fuel pump, and
a pressure relief valve disposed within the second leg and integrally connected with the check valve via the conduit, the pressure relief valve being constructed and arranged such that when pressure of the fuel at the check valve is outside a certain pressure range, the pressure relief valve will open to permit fuel in the conduit to enter the return line to thereby maintain fuel exiting the check valve within the certain pressure range.