Fuel system with leak location diagnostic features and component for same
First Claim
1. A leak diagnosis component for a fuel system of an engine comprising:
- a junction block with a plurality of inlets and at least one outlet disposed in said junction block and opening through an external surface of said junction block;
said inlets being fluidly connected to said at least one outlet via a plurality of leak paths disposed in said junction block, and each of said inlets being configured for connection to a different leak line of a fuel system for an engine;
a plurality of leak collection cavities disposed in said junction block, and each of said leak paths being fluidly connected to one of the plurality of leak collection cavities; and
a plurality of leak diagnostic ports disposed in said junction block, and each one of the plurality of leak diagnostic ports extending between a respective one of said leak collection cavities and said external surface of said junction block.
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Accused Products
Abstract
A leak diagnostic strategy for an engine equipped with a high pressure common rail fuel system includes a plurality of separate leak lines. Each of the leak lines is constructed and positioned to capture fuel leaking from one of several different high pressure spaces associated with the fuel system. Once a leak is detected, the location of the leak can be diagnosed by opening different leak diagnostic ports until fuel is evacuated from the system. Each of the leak diagnostic ports is associated with one of the leak lines. The system allows for quick determination of a leak location without cumbersome testing or partial dismantlement of engine related subsystems and components.
28 Citations
16 Claims
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1. A leak diagnosis component for a fuel system of an engine comprising:
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a junction block with a plurality of inlets and at least one outlet disposed in said junction block and opening through an external surface of said junction block; said inlets being fluidly connected to said at least one outlet via a plurality of leak paths disposed in said junction block, and each of said inlets being configured for connection to a different leak line of a fuel system for an engine; a plurality of leak collection cavities disposed in said junction block, and each of said leak paths being fluidly connected to one of the plurality of leak collection cavities; and a plurality of leak diagnostic ports disposed in said junction block, and each one of the plurality of leak diagnostic ports extending between a respective one of said leak collection cavities and said external surface of said junction block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fuel system comprising:
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a plurality of high pressure fuel spaces; a plurality of leak lines operably connected to capture fuel leaking from different ones of said high pressure fuel spaces; each one of a plurality of leak diagnostic ports being fluidly connected to a different one of said leak lines, and the plurality of leak diagnostic ports being operably positioned to evacuate fuel from said leak lines; a consolidated leak line with one end fluidly connected to said leak lines; a wet sensor operably connected to said consolidated leak line; and wherein said one end of said consolidated leak line, said leak diagnostic ports and one end of each of said leak lines being disposed in a leak diagnostic junction block. - View Dependent Claims (10, 11, 12)
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13. A method of diagnosing a leak location in a fuel system for an engine, comprising the steps of:
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capturing fuel from a leak originating from one of a plurality of different high pressure spaces into one of a plurality of separate leak lines; opening different leak diagnostic ports until fuel is evacuated from one of the leak lines; and identifying which one of the high pressure spaces is associated with the one of the leak lines. - View Dependent Claims (14, 15, 16)
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Specification