Fuel efficiency determination for an engine
First Claim
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1. A fuel efficiency estimation system for determining a fuel efficiency of an internal combustion engine comprising:
- a first module that determines a current iterative intake air mass value provided to said engine and compares said current iterative intake air mass value to a previous iterative intake air mass value, said first module providing said current iterative intake air mass value as a final intake air mass value when a difference between said current iterative intake air mass value and said previous iterative intake air mass value is less than a predetermined threshold value;
a second module that determines a fuel mass rate value based on said final air intake mass value; and
a third module that determines a power loss for the internal combustion engine based on said fuel mass rate value, wherein a fuel efficiency of the engine is determined based on said power loss.
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Abstract
A module that calculates power loss for an internal combustion engine includes an air intake calculation module that determines a final air per cylinder (APC) value. A fuel mass rate calculation module that determines a fuel mass rate value based on the final APC value. A power loss calculation module that determines a power loss value for the internal combustion engine based on the fuel mass rate value.
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Citations
16 Claims
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1. A fuel efficiency estimation system for determining a fuel efficiency of an internal combustion engine comprising:
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a first module that determines a current iterative intake air mass value provided to said engine and compares said current iterative intake air mass value to a previous iterative intake air mass value, said first module providing said current iterative intake air mass value as a final intake air mass value when a difference between said current iterative intake air mass value and said previous iterative intake air mass value is less than a predetermined threshold value; a second module that determines a fuel mass rate value based on said final air intake mass value; and a third module that determines a power loss for the internal combustion engine based on said fuel mass rate value, wherein a fuel efficiency of the engine is determined based on said power loss. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of determining a fuel efficiency of an internal combustion engine, comprising:
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determining a current iterative intake air mass value provided to said engine; comparing said current iterative intake air mass value to a previous iterative intake air mass value; providing said current iterative intake air mass value as a final intake air mass value when a difference between said current iterative intake air mass value and said previous iterative intake air mass value is less than a predetermined threshold value determining a fuel mass rate value based on said final intake air mass value; calculating a power loss of the internal combustion engine based on said fuel mass rate value; and determining the fuel efficiency based on said power loss. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification