System for modifying fuel pressure in a high-pressure fuel injection system for fuel system leakage testing
AssigneeCummins Inc.
InventorsCarlton G. Bale, Bart Dye, Johnny G. Gipson
Life of this patent
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Abstract
A system is disclosed for modifying fuel pressure in a high-pressure fuel injection system of an internal combustion engine for subsequent fuel system leak testing. The fuel pressure in a fuel collection unit of the fuel injection system is increased to a fuel pressure near a maximum allowable fuel collection unit fuel pressure value while maintaining low engine load.
Claims26
System for modifying fuel pressure in a high-pressure fuel injection system of an internal combustion engine, the system for modifying fuel pressure comprising:
- a fuel collection unit configured to store high-pressure fuel therein;
- at least one fuel injector configured to supply fuel from the fuel collection unit to the engine;
- and
- means for controlling fuel pressure within the fuel collection unit to a target fuel pressure near a maximum allowable fuel collection unit fuel pressure level while maintaining low engine load.
System for modifying fuel pressure in a high-pressure fuel injection system of an internal combustion engine, the system for modifying fuel pressure comprising:
- a fuel collection unit configured to store high-pressure fuel therein;
- a fuel injector configured to supply fuel from the fuel collection unit to the engine;
- a control structure configured to control the fuel pressure within the fuel collection unit to a target fuel pressure near a maximum allowable fuel collection unit fuel pressure level while maintaining low engine load.
A method for modifying fuel pressure in a high-pressure fuel injection system of an internal combustion engine, the high-pressure fuel injection system including a fuel collection unit storing high-pressure fuel therein and at least one fuel injector supplying fuel from the fuel collection unit to the engine, the method comprising:
- controlling engine load to within a range of low engine loads;
- and
- controlling fuel pressure within the fuel collection unit to a target fuel pressure near a maximum allowable fuel collection unit fuel pressure level while maintaining engine load within the range of low engine loads.
Dependencies are inferred from the claim text.