Corrugated fuel rail damper
AssigneeSiemens Automotive Corporation
InventorsFarid Heidari Miandoab, Hamid Sayar
Life of this patent
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Abstract
A fuel rail that forms a conduit for pressurized fuel to be delivered to at least one fuel injector. The fuel rail includes an elongated member that is corrugated such that the fuel rail acts as a pressure damper. A method of reducing pressure pulsation in a fuel system is achieved by configuring a fuel of a second configuration from an initial configuration, the second configuration having a first portion and a second portion, the first portion having at least three points defining a virtual plane, the first portion including a continuous surface that intersects the virtual plane at a plurality of positions.
Claims21
A fuel rail comprising:
- an elongated member having a longitudinal axis extending therethrough, the elongated member including:
- a continuous outer surface exposed to a ambient environment, the continuous outer surface surrounding a continuous inner surface, the continuous inner surface cincturing the longitudinal axis and defining an interior volume, the continuous inner surface being exposed to the interior volume and having an uniform composition with at least one undulation disposed about the longitudinal axis.
A method of damping pressure pulsations in a fuel injection system having a pressurized fuel source coupled to at least one fuel injector with a fuel rail establishing fluid communication between the pressurized fuel source and the at least one fuel injector, the fuel rail extending along a longitudinal axis, the method comprising:
- providing an elongated member that extends along the longitudinal axis, the elongated member having a continuous inner surface and a continuous outer surface of an uniform composition cincturing the longitudinal axis and exposed to an ambient environment, the continuous inner surface defining a first predetermined internal volume of a first configuration of the fuel rail;
- and corrugating a first portion of the elongated member so as to define a second predetermined internal volume of a second configuration of the fuel rail.
Dependencies are inferred from the claim text.