Self-contained fuel pressure regulator
This patent describes a self-contained fuel pressure regulator assembly adapted for plug-connection directly to an engine manifold and fuel rail assembly. The manifold and fuel rail assembly having a fitting for transferring pressure from the manifold and an adapter for transferring fuel from the fuel rail, the pressure regulator assembly comprising a base having a fuel chamber adapted for plug-connection directly to the adapter to receive fuel from the fuel rail, the base also having a fuel discharge passage and a valve seat in the discharge passage through which fuel flows from the chamber to the discharge passage, a flexible diaphragm closing the chamber, a valve member positioned by the diaphragm to control fuel flow through the valve seat, a cover forming a pressure chamber with the diaphragm, the base further having a pressure passage adapted for plug-connection directly to the fitting, the pressure passage extending to the pressure chamber to transfer the pressure in the manifold to the pressure chamber, and a spring having a bias supplementing the manifold pressure in the pressure chamber acting on the diaphragm and opposing the fuel pressure in the fuel chamber acting on the diaphragm, whereby the diaphragm may flex in response to variations in fuel pressure in the fuel chamber and manifold pressure in the pressure chamber and position the valve member to maintain the pressure in the fuel chamber and thus in the fuel rail balanced with the bias of the spring and the pressure in the pressure chamber and thus in the manifold.
- Assignee:
- General Motors Corp., Detroit, MI
- Patent Number(s):
- US 4756289
- OSTI ID:
- 6793214
- Country of Publication:
- United States
- Language:
- English
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