METHOD AND APPARATUS TO DETERMINE INSTANTANEOUS ENGINE POWER LOSS FOR A POWERTRAIN SYSTEM
First Claim
1. Article of manufacture, comprising a storage medium having a machine-executable program encoded therein to control operation of an internal combustion engine, the program comprising:
- code to monitor engine operating conditions;
code to determine a nominal power loss based upon an engine operating point;
code to determine a power loss correction to the nominal power loss based upon the engine operating conditions and the engine operating point, the power loss correction determinable for combinations of an engine air/fuel ratio mode, an engine cylinder activation state, and, an engine operating temperature mode; and
,code to estimate a power loss for the internal combustion engine based upon the nominal power loss and the power loss correction.
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Accused Products
Abstract
There is provided a method and an article of manufacture comprising a storage medium having machine-executable code stored therein for estimating a power loss for an internal combustion engine at a point in time. The code includes code to determine engine operating conditions. A nominal power loss is determined based upon an engine operating point. A power loss correction to the nominal power loss is determined based upon barometric pressure, engine temperature, air/fuel ratio, and catalyst temperature. The power loss correction is determinable for: an engine air/fuel ratio mode, an engine cylinder activation mode, and, an engine operating temperature mode.
170 Citations
20 Claims
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1. Article of manufacture, comprising a storage medium having a machine-executable program encoded therein to control operation of an internal combustion engine, the program comprising:
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code to monitor engine operating conditions; code to determine a nominal power loss based upon an engine operating point; code to determine a power loss correction to the nominal power loss based upon the engine operating conditions and the engine operating point, the power loss correction determinable for combinations of an engine air/fuel ratio mode, an engine cylinder activation state, and, an engine operating temperature mode; and
,code to estimate a power loss for the internal combustion engine based upon the nominal power loss and the power loss correction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Article of manufacture, comprising a storage medium having machine-executable program stored therein to estimate a correction from a nominal power loss for an internal combustion engine to control engine operation, the program comprising:
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code to monitor engine operating conditions; code to monitor engine operation, comprising;
engine operating modes of an engine air/fuel ratio mode and an engine operating temperature mode, and an engine cylinder activation state;code to determine a power loss correction at an engine operating point based upon the engine operating conditions and the engine operation; and
,code to control engine operation based upon the nominal power loss and the power loss correction. - View Dependent Claims (16, 17, 18)
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19. Method for operating an engine, comprising:
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estimating an instantaneous power loss for an internal combustion engine, comprising;
monitoring engine operating conditions;
determining a nominal power loss at an engine operating point based upon the engine operating conditions;
determining a power loss correction to the nominal power loss based upon the engine operating conditions and the engine operating point, the power loss correction determinable for combinations of an engine air/fuel ratio mode, an engine cylinder activation state, and, an engine operating temperature mode; and
,controlling the engine based upon the estimated instantaneous power loss. - View Dependent Claims (20)
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Specification