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US 10,591,379 B2Granted
System and method for identifying a source of high pressure leakage
AssigneeCummins Inc.
InventorsDavid Michael Carey, Shounak Mishra, Zachary L. Anslinger, Sarah E. Gnau, Srinivas K. Mulukutla, Edward Nathan Linen
Life of this patent
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Abstract
A method for identifying a source of high pressure leakage of a fuel system of an engine comprising determining pressure decay values at a first pressure and at a second pressure and identifying the source of high pressure leakage based on the pressure decay values at each pressure.
Claims21
A method for identifying a source of high pressure leakage, comprising:
- providing a control system comprising a control computer having non-transitory instructions thereon, and at least one sensor for determining pressure within a fuel system of an engine;
- shutting the engine down;
- causing pressure within the fuel system to reach a first initial pressure;
- receiving, by the control computer, data from the at least one sensor representing pressure within the fuel system over a first period of time;
- causing pressure within the fuel system to reach a second initial pressure;
- receiving, by the control computer, data from the at least one sensor representing pressure within the fuel system over a second period of time, the first and second periods of time occurring while the engine is shut down;
- determining, by the control computer, a pressure decay value over the first period of time and a pressure decay value over the second period of time;
- and
- determining, by the control computer, if one of at least one outlet check valve of the fuel system and at least one sub-component of the fuel system are a source of high pressure leakage in the engine, wherein
- a) the at least one outlet check valve is determined to be a source of high pressure leakage when the pressure decay value over the first period of time is below a first pressure decay predetermined threshold value and the pressure decay value over the second period of time exceeds a second pressure decay predetermined threshold value;
- and
- b) the at least one sub-component of the fuel system is determined to be a source of high pressure leakage when the pressure decay values during both the first and second periods of time exceed both the first pressure decay predetermined threshold value and the second pressure decay predetermined threshold value.
9 more elements
A system for identifying a source of high pressure leakage of a fuel system of an engine, comprising:
- a pressure sensor operable to detect pressure in the fuel system starting at a first initial pressure for a first period of time and starting a second initial pressure for a second period of time, the first initial pressure and the second initial pressure and the first and second periods of time occurring while the engine is shut down;
- and
- a control module having non-transitory instructions thereon and configured to determine if one of an at least one outlet check valve of the fuel system and an at least one sub-component of the fuel system is a source of high pressure leakage, wherein,
- a) the at least one outlet check value is determined to be a source of high pressure leakage if a pressure decay value determined during the first period of time is below a first pressure decay predetermined threshold value and a pressure decay value determined during the second period of time exceeds a second pressure decay predetermined threshold value;
- and
- b) the sub-component of the fuel system is determined to be a source of high pressure leakage if the pressure decay values during both the first period of time and the second period of time exceed both the first pressure decay predetermined threshold value and the second pressure decay predetermined threshold value.
3 more elements
A method for identifying a source of high pressure leakage, comprising:
- providing a control system comprising a control computer having non-transitory instructions thereon, and at least one sensor for determining pressure within a fuel system of an engine;
- shutting the engine down;
- causing pressure within the fuel system to reach a first initial pressure;
- receiving, by the control computer, data from the at least one sensor representing pressure within the fuel system over a first period of time;
- causing pressure within the fuel system to reach a second initial pressure;
- receiving, by the control computer, data from the at least one sensor representing pressure within the fuel system over a second period of time, the first and second periods of time occurring while the engine is shut down;
- determining, by the control computer, a pressure decay value over the first period of time and a pressure decay value over the second period of time;
- determining, by the control computer, a pressure decay ratio of the pressure decay value over the second period of time to the pressure decay value over the first period of time;
- and
- determining, by the control computer, if one of at least one outlet check valve of the fuel system and at least one sub-component of the fuel system are a source of high pressure leakage in the engine, wherein
- a) the at least one outlet check valve is determined to be a source of high pressure leakage when the pressure decay ratio is approximately 1.5 or higher;
- and
- b) the at least one sub-component of the fuel system is determined to be a source of high pressure leakage when the pressure decay ratio is approximately 0.75 or lower.
10 more elements
Dependencies are inferred from the claim text.