System and method for determining engine fuel limits
First Claim
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1. A method for determining fuel limits for an engine comprising the steps of:
- measuring an actual fuel value for the engine by measuring an amount of fuel consumed while the engine operates at its maximum continuous rated speed and load;
receiving, at an engine control unit for the engine, the measured actual fuel value;
selecting a plurality of engine speed points;
calculating respective static fuel limit points for the engine speed points utilizing the actual fuel value; and
with the engine control unit, controlling the engine in dependence upon the calculated static fuel limit points;
wherein the static fuel limit points define and limit a rated power of the engine.
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Abstract
A method of determining fuel limits for an engine includes measuring an actual fuel value for the engine and creating a plurality of engine speed points. The method further includes calculating respective static fuel limit points for each of the engine speed points utilizing the actual fuel value. The static fuel limit points define and limit a rated power of the engine.
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Citations
22 Claims
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1. A method for determining fuel limits for an engine comprising the steps of:
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measuring an actual fuel value for the engine by measuring an amount of fuel consumed while the engine operates at its maximum continuous rated speed and load; receiving, at an engine control unit for the engine, the measured actual fuel value; selecting a plurality of engine speed points; calculating respective static fuel limit points for the engine speed points utilizing the actual fuel value; and with the engine control unit, controlling the engine in dependence upon the calculated static fuel limit points; wherein the static fuel limit points define and limit a rated power of the engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13)
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11. The method of 1 wherein the step of calculating the static fuel limit points for the engine speed points includes the step of:
adjusting the actual fuel value by a fuel value scaler to account for changes in achievable engine power.
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14. A method for modifying an engine fuel limit curve comprising the steps of:
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receiving, at an electronic control unit of an engine, a value for a configurable parameter; receiving, at the electronic control unit, and actual fuel valve for the engine, wherein the actual fuel value is obtained by measuring an amount of fuel consumed while the engine operates at its maximum continuous rated speed and load; calculating respective static fuel limit points for a plurality of engine speed points utilizing the actual fuel value for the engine and the configurable parameter; with the engine control unit, controlling the engine in dependence upon the calculated static fuel limit points; wherein the static fuel limit points define and limit a rated power of the engine; wherein the configurable parameter is at least one of a fuel value scaler which adjusts the actual fuel value to account for changes in achievable engine power, an application type for which the engine is to be used, a speed factor of an engine power map or a load factor of an engine power map. - View Dependent Claims (15, 16, 17, 18)
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19. An engine control system comprising:
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an engine control unit; and a storage device electrically connected to the engine control unit, the storage device comprising a non-transient tangible medium having machine readable instructions stored thereon that when executed by the engine control unit cause the engine control unit to calculate respective static fuel limit points for a plurality of engine speed points utilizing an actual fuel value for an engine and a value for a configurable parameter, the static fuel limit points defining and limiting a rated power of the engine; wherein the configurable parameter includes at least an application type for which the engine is to be used and at least one of a fuel value scaler which adjusts the actual fuel value to account for changes in achievable engine power, a speed factor of an engine power map or a load factor of an engine power map. - View Dependent Claims (20, 21)
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22. A method for determining fuel limits for an engine comprising the steps of:
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measuring an actual fuel value for the engine; selecting a plurality of engine speed points; calculating respective static fuel limit points for the engine speed points utilizing the actual fuel value, including selecting a power map based on an engine application and utilizing the power map to calculate the static fuel limit points, and adjusting the actual fuel value by a fuel value scaler to account for changes in achievable engine power due to engine component wear; and controlling operation of the engine in dependence upon the calculated static fuel limit points; wherein the static fuel limit points define and limit a rated power of the engine; and wherein the power map contains fuel limit regions containing normalized speed and load factors for multiple engine applications; and wherein the static fuel limits are automatically calculated each time an engine control unit associated with the engine is powered up.
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Specification