System and method for controlling engine idle speed based on operational state settings
First Claim
1. A method for controlling idle speeds for an internal combustion engine, the method comprising:
- operating the engine at a first idle speed when a first device is in a first operational state, and when the first device is in a second operational state and a second device is in a first operational state; and
operating the engine at a second idle speed when the first device is in the second operational state and the second device is in a second operational state, wherein the first idle speed is a low idle speed and the second idle speed is a high idle speed that is higher than the first idle speed, and the low idle speed is selected to provide reduced engagement torque to the second device and the high idle speed is selected to provide user desired acceleration performance.
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Abstract
A method for controlling engine idle speeds for an internal combustion engine. The method includes operating the engine at a first idle speed when a first device is in a first operational state, and when the first device is in a second operational state and a second device is in a first operational state, and operating the engine at a second idle speed when the first device is in the second operational state and the second device is in a second operational state. The first idle speed is a low idle speed and the second idle speed is a high idle speed that is higher than the first idle speed, and the low idle speed is selected to provide reduced engagement torque to the second device and the high idle speed is selected to provide user desired acceleration performance.
27 Citations
20 Claims
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1. A method for controlling idle speeds for an internal combustion engine, the method comprising:
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operating the engine at a first idle speed when a first device is in a first operational state, and when the first device is in a second operational state and a second device is in a first operational state; and
operating the engine at a second idle speed when the first device is in the second operational state and the second device is in a second operational state, wherein the first idle speed is a low idle speed and the second idle speed is a high idle speed that is higher than the first idle speed, and the low idle speed is selected to provide reduced engagement torque to the second device and the high idle speed is selected to provide user desired acceleration performance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for controlling idle speeds for an internal combustion engine, the system comprising:
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at least two sensors for providing an indication of operational states of two respective devices; and
an engine controller in communication with the sensors, the engine controller configured to, operate the engine at a first idle speed when a first device is in a first operational state, and when the first device is in a second operational state and a second device is in a first operational state; and
operate the engine at a second idle speed when the first device is in the second operational state and the second device is in a second operational state, wherein the first idle speed is a low idle speed and the second idle speed is a high idle speed that is higher than the first idle speed, and the low idle speed is selected to provide reduced engagement torque to the second device and the high idle speed is selected to provide user desired acceleration performance. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A computer-readable medium having stored thereon instructions which, when executed by a processor, cause the processor to perform the steps of:
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operating an internal combustion engine at a first idle speed when a first device is in a first operational state, and when the first device is in a second operational state and a second device is in a first operational state; and
operating the internal combustion engine at a second idle speed when the first device is in the second operational state and the second device is in a second operational state, wherein the first idle speed is a low idle speed and the second idle speed is a high idle speed that is higher than the first idle speed, and the low idle speed is selected to provide reduced engagement torque to the second device and the high idle speed is selected to provide user desired acceleration performance.
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Specification