Methods and systems for estimating engine fuel consumption
First Claim
Patent Images
1. A method, comprising:
- controlling an engine according to a control map, the control map specifying control settings according to a predetermined relationship with respect to engine speed and engine load; and
estimating fuel consumption of the engine based on each of;
an engine load indicated by an electric machine coupled to the engine; and
the predetermined relationship.
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Abstract
Various methods and systems are provided for estimating engine fuel consumption. In one example, a method comprises controlling an engine according to a control map, the control map specifying control settings according to a predetermined relationship with respect to engine speed and engine load. The method further comprises estimating fuel consumption of the engine based on each of: an electric-machine based engine load indicated by an electric machine coupled to the engine; and further based on the predetermined relationship.
34 Citations
19 Claims
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1. A method, comprising:
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controlling an engine according to a control map, the control map specifying control settings according to a predetermined relationship with respect to engine speed and engine load; and estimating fuel consumption of the engine based on each of;
an engine load indicated by an electric machine coupled to the engine; and
the predetermined relationship. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system, comprising:
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an engine; an electric machine mechanically coupled to the engine and configured to output a voltage; a control system operable to;
control the engine according to a control map which specifies control settings according to a predetermined relationship with respect to engine speed and engine load;
estimate fuel consumption based on the voltage output by the electric machine and the predetermined relationship; and
display information of the fuel consumption. - View Dependent Claims (10, 11, 12, 13)
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14. A method, comprising:
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controlling an engine according to a control map, the control map specifying a first fuel injection parameter of an engine according to a first relationship with respect to engine speed and engine load, and adjusting a second fuel injection parameter of the engine according to a second relationship with respect to manifold temperature; measuring a power of an electric machine coupled to the engine; estimating fuel consumption of the engine based on the first and second fuel injection parameters, the power, and the first and second relationships; and displaying the estimated fuel consumption to an operator of a vehicle in which the engine is positioned. - View Dependent Claims (15, 16, 17, 18)
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19. A method, comprising:
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controlling an engine according to a set of control settings that specifies the control settings as a predetermined function of engine speed and engine load; and estimating fuel consumption of the engine based on;
the engine load indicated by an electric machine coupled to the engine; and
the predetermined function.
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Specification