METHOD AND APPARATUS TO OPTIMIZE ENGINE WARM UP
First Claim
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1. Article of manufacture, comprising a storage medium having machine-executable program encoded therein to minimize energy loss of an internal combustion engine, the program comprising:
- code to monitor engine operating conditions;
code to estimate a future energy loss;
code to determine a power loss and a rate of change in the estimated future energy loss;
code to determine an engine operating point which minimizes the power loss and the rate of change in the estimated future energy loss during engine warm-up; and
,code to operate the engine at the engine operating point which minimizes the power loss and the rate of change in the estimated future energy loss during engine warm-up.
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Abstract
There is provided a method and an apparatus to minimize energy loss of an internal combustion engine during engine warm-up. This includes monitoring engine operating conditions, and estimating a future energy loss. A power loss and a rate of change in the estimated future energy loss are determined. An engine control scheme effective to minimize the power loss and the rate of change in the estimated future energy loss is executed during the engine warm-up.
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Citations
18 Claims
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1. Article of manufacture, comprising a storage medium having machine-executable program encoded therein to minimize energy loss of an internal combustion engine, the program comprising:
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code to monitor engine operating conditions; code to estimate a future energy loss; code to determine a power loss and a rate of change in the estimated future energy loss; code to determine an engine operating point which minimizes the power loss and the rate of change in the estimated future energy loss during engine warm-up; and
,code to operate the engine at the engine operating point which minimizes the power loss and the rate of change in the estimated future energy loss during engine warm-up. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Article of manufacture, comprising a storage medium having machine-executable code stored therein to minimize energy loss during warm-up of an internal combustion engine operative to transmit torque to an electro-mechanical transmission, the code comprising:
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code to estimate a future energy loss; code to determine a power loss and a rate of change in the estimated future energy loss; and
,code to execute an engine control scheme to minimize the power loss and the rate of change in the estimated future energy loss during the engine warm-up, the engine control scheme comprising one of an engine air/fuel ratio mode, an engine cylinder activation state, and, an engine operating temperature mode. - View Dependent Claims (14)
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15. Method to minimize energy loss of an internal combustion engine adapted to transmit torque to an electromechanical transmission, the internal combustion engine and the electromechanical transmission selectively operative to transmit torque therebetween, comprising:
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monitoring engine operating conditions; estimating a future energy loss; determining a power loss and a rate of change in the estimated future energy loss; determining an engine control scheme operative to minimize the power loss and the rate of change in the estimated future energy loss during engine warm-up; and
,executing the engine control scheme to minimize the power loss and the rate of change in the estimated future energy loss during engine warm-up. - View Dependent Claims (16, 17, 18)
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Specification