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US 11,713,806 B2Granted
Hydraulic assembly for a vehicle transmission
AssigneeDeere & Company
InventorsMichael Meid, Manuel Billich
Life of this patent
Estimating the term…
Abstract
A hydraulic assembly for a vehicle transmission includes a hydraulic pump for providing a system pressure within a hydraulic circuit, a pressure accumulator for temporarily supplying pressure to the hydraulic circuit, and a valve assembly for charging the pressure accumulator after a predetermined pressure threshold value of the system pressure has been reached or exceeded. The valve assembly is hydraulically connected between the pump and the pressure accumulator.
Claims15
A hydraulic assembly for a vehicle transmission, comprising:
- a hydraulic pump for providing a system pressure within a hydraulic circuit;
- a pressure accumulator for temporarily supplying pressure to the hydraulic circuit;
- and
- a valve assembly for charging the pressure accumulator after a predetermined pressure threshold value of the system pressure has been reached or exceeded, the valve assembly hydraulically connected between the pump and the pressure accumulator;
- wherein the valve assembly includes a charging valve unit which acts as a blockable hydraulic connection between the pump and the pressure accumulator, the hydraulic connection is blocked when the system pressure is below the predetermined pressure threshold value, the blocking is removed after the predetermined pressure threshold value has been reached or exceeded, and the pressure threshold value of the system pressure is predetermined by a compression spring of the charging valve unit that acts against the system pressure;
- wherein the valve assembly includes a discharging valve unit with a flow direction for temporarily supplying pressure to the hydraulic circuit, and the discharging valve unit includes a blocking valve having a compression spring with a blocking direction which runs from the pump to the pressure accumulator;
- and
- wherein the valve assembly includes a hydraulic equalization orifice between the pump and the pressure accumulator.
5 more elements
A commercial vehicle having hydraulic assembly for a transmission, comprising:
- a hydraulic pump for providing a system pressure within a hydraulic circuit;
- a pressure accumulator for temporarily supplying pressure to the hydraulic circuit;
- and
- a valve assembly for charging the pressure accumulator after a predetermined pressure threshold value of the system pressure has been reached or exceeded, the valve assembly hydraulically connected between the pump and the pressure accumulator;
- wherein the valve assembly includes a charging valve unit which acts as a blockable hydraulic connection between the pump and the pressure accumulator, the hydraulic connection is blocked when the system pressure is below the predetermined pressure threshold value, the blocking is removed after the predetermined pressure threshold value has been reached or exceeded, and the pressure threshold value of the system pressure is predetermined by a compression spring of the charging valve unit that acts against the system pressure;
- wherein the valve assembly includes a discharging valve unit with a flow direction for temporarily supplying pressure to the hydraulic circuit, and the discharging valve unit includes a blocking valve having a compression spring with a blocking direction which runs from the pump to the pressure accumulator;
- and
- wherein the valve assembly includes a hydraulic equalization orifice between the pump and the pressure accumulator.
5 more elements
A hydraulic assembly for a vehicle transmission, comprising:
- a hydraulic pump for providing a system pressure within a hydraulic circuit;
- a pressure accumulator for temporarily supplying pressure to the hydraulic circuit;
- and
- a valve assembly for charging the pressure accumulator after a predetermined pressure threshold value of the system pressure has been reached or exceeded, the valve assembly hydraulically connected between the pump and the pressure accumulator;
- wherein the valve assembly includes a charging valve unit which acts as a blockable hydraulic connection between the pump and the pressure accumulator, the hydraulic connection is blocked when the system pressure is below the predetermined pressure threshold value, the blocking is removed after the predetermined pressure threshold value has been reached or exceeded, and the pressure threshold value of the system pressure is predetermined by a compression spring of the charging valve unit that acts against the system pressure;
- wherein the valve assembly includes a discharging valve unit with a flow direction for temporarily supplying pressure to the hydraulic circuit, and the discharging valve unit includes a blocking valve having a compression spring with a blocking direction which runs from the pump to the pressure accumulator;
- and
- wherein the compression spring of the charging valve unit and the compression spring of the blocking valve are arranged coaxially.
5 more elements
Dependencies are inferred from the claim text.