Back to results
US 9,429,084 B2Granted
Methods and systems for operating an engine in a hybrid vehicle driveline
AssigneeFord Global Technologies, LLC
InventorsDouglas Raymond Martin, Kenneth James Miller, Stephen Li-Chun Shen
Life of this patent
Estimating the term…
Abstract
Systems and methods for increasing hybrid driveline efficiency are disclosed. In one example, an efficient engine operating region is defined within an engine operating domain based on an engine's brake specific fuel consumption. The systems and methods may increase an amount of time a hybrid driveline operates at more efficient operating conditions.
Claims20
A method for operating an engine, comprising:
- defining an efficient engine operating region over an engine operating domain;
- applying a first filter to a desired engine power to provide a filtered engine power via a controller if the desired engine power is within the efficient engine operating region;
- applying a second filter to the desired engine power to provide the filtered engine power via the controller if the desired engine power is not within the efficient engine operating region;
- and commanding the engine to operate at the filtered engine power via the controller.
1 more element
A method for operating an engine, comprising:
- defining an efficient engine operating region over an engine operating domain;
- applying a first filter to a desired engine power to provide a filtered engine power via a controller if the desired engine power is within or exiting the efficient engine operating region, the first filter a low pass filter based on a difference in the desired engine power and the filtered engine power;
- applying a second filter to the desired engine power to provide the filtered engine power via the controller if the desired engine power is not within the efficient engine operating region;
- and
- commanding the engine to operate at the filtered engine power via the controller.
2 more elements
A vehicle system, comprising:
- an engine;
- a motor/generator in mechanical communication with the engine;
- and
- a controller including non-transitory instructions executable to filter a desired engine power such that a filtered engine power remains in a defined efficient engine operating region stored in memory for a first time interval when the desired engine power is outside of the defined efficient engine operating region, where the desired engine power is filtered via a low pass filter based on a difference in the desired engine power and the filtered engine power.
1 more element
Dependencies are inferred from the claim text.