System and method for power take-off control
AssigneeFord Global Technologies, LLC
InventorsStuart C. Salter, Brendan Diamond, Bryan Wilbur Hoy, Todd Ansbacher, Jon Holt, Ryan Delaney
Life of this patent
Estimating the term…
Abstract
Methods and systems for operating a vehicle powertrain that includes a power take-off are presented. In one non-limiting example, engine speed may be adjusted to increase engine efficiency during conditions when the engine is operating at idle conditions for longer than a threshold amount of time so that fuel consumption and wear may be reduced.
Claims15
A method for operating a powertrain of a vehicle, comprising:
- via a controller, adjusting an engine rotational speed when a power take-off positioned downstream of a torque converter is engaged in response to an actual total amount of time an engine is at idle conditions exceeding a threshold amount of time and engine efficiency being more than a threshold engine efficiency away from a predetermined engine efficiency, where the actual total amount of time the engine is at idle begins from a most recent time the engine entered idle conditions, and where adjusting the engine rotational speed includes increasing engine rotational speed.
A method for operating a powertrain of a vehicle, comprising:
- via a controller, adjusting an engine rotational speed when a power take-off positioned downstream of a torque converter is engaged in response to an actual total amount of time an engine is at idle conditions exceeding a threshold amount of time and engine efficiency being more than a threshold engine efficiency away from a predetermined engine efficiency, where the actual total amount of time the engine is at idle begins from a most recent time the engine entered idle conditions, the method further comprising determining a time averaged engine power in response to operating the engine at an elevated idle rotational speed for longer than the threshold amount of time.
A vehicle system, comprising:
- an engine;
- a transmission including a torque converter, a power take-off positioned downstream of the torque converter and upstream of a transmission output shaft;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to adjust a rotational speed of the engine when the power take-off is engaged and no power take-off use is determined in response to an actual total amount of time the engine is operating at idle conditions exceeding a threshold amount of time, where the actual total amount of time the engine is operating at idle conditions begins at a time that the engine most recently entered idle conditions, and where no power take-off use is determined based on engine load being less than a threshold load.
A method for operating a powertrain of a vehicle, comprising:
- via a controller, adjusting operation of an engine in response to a present engine efficiency, an assessment of whether or not a power take-off is operating an external device, and the engine being at uninterrupted idle conditions for longer than a predetermined amount of time, where the assessment of whether or not the power take-off is operating the external device is based on engine load.
Dependencies are inferred from the claim text.