Coupling valve structure for fuel supply module

US6981491B2 · kind B2 · utility

Assignee

• Siemens VDO Automotive AG · US

Inventors

• Jochen Schmitt · Ludwigshütte, DE
• Holger Dilchert · Frankfurt, DE
• Michael Teichert · Schwalbach, DE
• Andreas Bernert · Bad Homburg vor der Höhe, DE

Key dates

• Filing date: Dec 16, 2004
• Grant date: Jan 3, 2006
• Expiry date: Dec 16, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M37/106
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A coupling valve structure 26 is provided for a fuel supply module 20. The module has a fuel pump 20 disposed in a fuel reservoir 18, a feed line 21 in fluid communication with an outlet of the fuel pump for feeding fuel to a high pressure pump 16 and thus to an engine, and a return line 22 for returning excess fuel from the engine or high pressure fuel pump to the reservoir 18. The coupling valve structure 26 includes a check valve 28 constructed and arranged to communicate with the feed line 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 30 integrally connected with the check valve via a conduit 23. The pressure relief valve 30 is constructed and arranged to communicate with the return line such that when pressure of the fuel at the check valve 28 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.