Back to results
US 2025/0059986 A1Published application
Methods and system for mitigating hydraulic system sensor degradation
AssigneeDana Automotive Systems Group, LLC
InventorsAaron SHORT, Ian MORRISH
Life of this patent
Estimating the term…
Abstract
Methods and systems for operating a hydraulic system that includes an electrically driven pump, accumulator, and hydraulic actuators are described. In one example, if degradation of a pressure sensor is present, pressure in the accumulator is estimated based on a volume of the accumulator and/or an amount of electric current that is supplied to an electrically driven pump.
Claims20
A method for operating a hydraulic system, comprising:
- adjusting operation of a pump in response to output of a pressure sensor that indicates pressure in an accumulator;
- and
- adjusting operation of the pump in response to an amount of electric current delivered to the pump and an indication of degradation of the pressure sensor.
A hydraulic system, comprising:
- one or more hydraulic actuators;
- an electrically driven pump;
- an accumulator, the accumulator hydraulically selectively coupled to the one or more hydraulic actuators and the electrically driven pump;
- a pressure sensor;
- and
- a controller including a non-transitory computer readable medium having executable instructions that cause the controller to adjust operation of the electrically driven pump in response to output of the pressure sensor during a first condition and adjust operation of the electrically driven pump in response to a pressure estimate based on a volume model for the accumulator during a second condition.
3 more elements
A method for operating a hydraulic system, comprising:
- adjusting operation of a pump in response to output of a pressure sensor that indicates pressure in an accumulator;
- and
- adjusting operation of the pump in response to a pressure estimate based on a volume of fluid stored in the accumulator.
Dependencies are inferred from the claim text.