Fuel rail assembly and method of fabrication
A fabricated fuel rail assembly for an engine is described. The assembly comprises an elongated sheet metal fuel rail body defining a fuel supply passage and having axially spaced transversely extending fuel injector sockets, the passage intersects the sockets for supplying fuel to the sockets. Each of the sockets receives a fuel injector adapted to deliver fuel from its socket to the engine. It also includes a fuel pressure regulator for controlling the fuel pressure in the fuel supply passage, the pressure regulator includes a diaphragm overlying a sheet metal base and defining a fuel chamber therebetween, the base includes a fuel access region opening from the supply passage to the chamber and a fuel outlet opening from the chamber and a valve seat surrounding the outlet, the diaphragm carries a valve member controlling fuel flow past the valve seat through the outlet, a coil spring engages the diaphragm and biasing to urge the valve member toward the valve seat whereby fuel flow past the valve seat through the outlet is controlled to balance the fuel pressure on the diaphragm with the bias of the spring on the diaphragm, the fuel rail body is formed with a planar region and an aperture in the planar region, the pressure regulator base is formed with a planar region which overlies the fuel rail body planar region, the fuel access region is formed as a tubular fitting extruded from the base and extending directly into the aperture to provide a fuel flow connection from the fuel supply passage to the pressure regulator chamber, the planar region of the pressure regulator base is brazed to the planar region of the fuel rail body to maintain the pressure regulator in a securely sealed assembly with the fuel rail body.
- Assignee:
- General Motors Corp., Detroit, MI
- Patent Number(s):
- US 4570600
- OSTI ID:
- 6074310
- Resource Relation:
- Patent File Date: Filed date 29 Sep 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FUEL INJECTION SYSTEMS
DESIGN
FABRICATION
INTERNAL COMBUSTION ENGINES
COMBUSTION CHAMBERS
METALS
PRESSURE CONTROL
PRESSURE REGULATORS
VALVES
CONTROL
CONTROL EQUIPMENT
ELEMENTS
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL SYSTEMS
HEAT ENGINES
330100* - Internal Combustion Engines