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US 5,863,277 AGranted
Idle speed control for internal combustion engines
AssigneeOrbital Engine Company (Australia) Pty. Limited
InventorKeith Melbourne
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AssigneeOrbital Engine Company (Australia) Pty. Limited
InventorKeith Melbourne
Estimating the term…
A method of controlling the idle speed of an internal combustion engine of a vehicle from a first idle speed to a second idle speed that is higher than the first idle speed in response to a driver originating indication that is independent of the acceleration control of the vehicle. The higher second idle speed is set to achieve a desired level of vehicle creep. When the driver originating indication indicates that vehicle motion is no longer desired, the engine idle speed is returned to the first lower idle speed. The change between the first lower idle speed and the second higher idle speed can be accomplished in a stepping or ramping fashion. In addition, the first and second idle speeds are adjusted in response to changes in engine operating parameters such as engine coolant temperature, changes in engine load, and vehicle speed. Tilt indication means are used to determine the inclination of the vehicle and adjust the idle speed of the vehicle to achieve the desired vehicle creep when the vehicle is on an incline.
A method of controlling the idle speed of an engine of a vehicle having an automatic transmission, including increasing the engine speed from a first idle speed to a second idle speed higher than said first idle speed in response to a driver originating indication independent of an acceleration control of the vehicle that vehicle motion is desired, the higher second idle speed being set to achieve a desired level of vehicle creep.
A method of controlling the idle speed of an engine of a vehicle, including increasing the engine speed from a first idle speed to a second idle speed higher than said first idle speed in response to the release of a brake of the vehicle brake system.
A vehicle engine control system for a vehicle having an automatic transmission including control means for increasing the engine speed from a first idle speed to a second idle speed higher than said first idle speed in response to a driver originating indication independent of an acceleration control of the vehicle, that vehicle motion is desired, the higher second idle speed being set to achieve a desired level of vehicle creep.
A vehicle engine control system for a vehicle, including control means for increasing the engine speed from a first idle speed to a second idle speed higher than said first idle speed in response to the release of a brake of a vehicle brake system.
Dependencies are inferred from the claim text.