Hydraulic system and method for operation of said system
AssigneeDana Automotive Systems Group, LLC
InventorThomas M. O'NEIL
Life of this patent
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Abstract
Methods and systems for hydraulic actuation of axle system components are provided. A hydraulic system in an electric axle, is provided in one example, which includes a housing with a plurality of sections that enclose an electric motor and a gearbox, the system further includes a hydraulic pump that is coupled to the housing and configured to supply pressurized fluid to a solenoid valve through a plurality of fluid passages. The hydraulic system further includes a clutch in the gearbox configured to receive the pressurized fluid from the solenoid valve through a hydraulic passage internally routed through the housing.
Claims20
A hydraulic system in an electric axle, comprising:
- a housing including a plurality of sections that enclose an electric motor and a gearbox;
- a hydraulic pump coupled to an outer surface of one of the plurality of housing sections, configured to receive a fluid from a sump, and configured to supply pressurized fluid to a first solenoid valve through a plurality of fluid passages;
- and
- a first clutch arranged in the gearbox and configured to receive the pressurized fluid from the first solenoid valve through a hydraulic passage;
- wherein the hydraulic passage is internally routed through the one of the plurality of housing sections.
A method for operation of a hydraulic system in an electric axle, comprising:
- flowing a lubricant to a plurality of solenoid valves from a hydraulic pump through a pressurized plenum that extends along an exterior surface of a section of a housing that encloses a gearbox;
- and
- during a first condition, engaging a first hydraulically operated clutch using lubricant flow control between a first one of the plurality of solenoid valves and the first hydraulically operated clutch;
- wherein a plurality of hydraulic passages are internally routed through the section of the housing and provide fluidic communication between the plurality of solenoid valves and the hydraulic pump.
A hydraulic system in an electric axle of a vehicle, comprising:
- a housing including a plurality of sections that enclose an electric motor and a gearbox;
- a hydraulic pump coupled to an outer surface of one of the plurality of housing sections, receiving a fluid from a sump, and supplying pressurized fluid to a first solenoid valve and a second solenoid valve;
- a first clutch receiving the pressurized fluid from the first solenoid valve via a first hydraulic passage that is routed through one of the plurality of housing sections;
- and
- a second clutch receiving the pressurized fluid from the second solenoid valve via a second hydraulic passage that is routed through one of the plurality of housing sections.
Dependencies are inferred from the claim text.