Fuel injector
AssigneeTransportation IP Holdings, LLC
InventorsPisey Leute, Justin Thomas Brumberg, Jesse Brigden
Life of this patent
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Abstract
A configuration is provided for a fuel injector for a common rail fuel system. In one example, the fuel injector may include a housing, an inner chamber enclosed by the housing, and a flow limiting valve. The flow limiting valve may be arranged at a downstream end of the inner chamber and also enclosed by the housing. This configuration may allow the fuel injector housing to have sufficient wall strength to withstand high pressure fuel injection and may allow effective fuel supply cut off when fuel cut off is demanded.
Claims20
A fuel injector, comprising:
- a housing;
- an inner chamber enclosed by the housing wherein the inner chamber has a first portion situated within a fuel injector head and a second portion situated within a fuel injector body;
- and
- a flow limiting valve arranged at a downstream end of the inner chamber and also enclosed by the housing, wherein the flow limiting valve is positioned between the downstream end of the inner chamber and a solenoid valve.
A common rail fuel system for an engine, comprising:
- a high pressure fuel rail;
- and
- a fuel injector configured to inject fuel from the high pressure fuel rail into a cylinder, the fuel injector including:
- a filter positioned at an inlet of the fuel injector, the inlet located at a first end of the fuel injector, wherein the filter is upstream of an internal accumulator with a first portion of the internal accumulator situated within the fuel injector head and a second portion of the internal accumulator situated with the fuel injector body;
- a flow limiting valve arranged in a mid-region along a length of the fuel injector, upstream of a solenoid valve, the flow limiting valve configured as a fuel cutoff during an overfueling event;
- and
- an accumulator extending between the filter and the flow limiting valve.
A fuel injector for a common rail fuel system, comprising:
- a housing enclosing a plurality of inner components of the fuel injector, the plurality of inner components including a flow limiting valve arranged in between an accumulator and a solenoid valve of the fuel injector, wherein a thickness of a wall of the housing is thinner at a head of the fuel injector than at a body of the fuel injector by an amount equal to or less than a threshold difference, wherein the accumulator has a first portion situated within a fuel injector head and a second portion situated within a fuel injector body, and wherein the first portion has a length that is less than the length of the second portion.
Dependencies are inferred from the claim text.