Fuel efficiency determination for an engine
AssigneeGM Global Technology Operations LLC
InventorsMichael Livshiz, John P. Blanchard, John L. Lahti, Anthony H. Heap
Life of this patent
Estimating the term…
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.
Claims16
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.
A method of determining a fuel efficiency of an internal combustion engine, comprising:
- 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.
Dependencies are inferred from the claim text.