Method for the valve control of a hydraulic valve
AssigneeSchaeffler Technologies AG & Co. KG
InventorRalf Mannsperger
Life of this patent
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Abstract
A method for valve control of a hydraulic valve which, in an actuation device of a clutch, influences an actuation pressure for actuating the clutch in accordance with an electrical actuation variable that actuates the hydraulic valve. The method includes selectively switching the clutch at least between a first clutch actuation state, in which the actuation pressure has a pressure value in a first actuation pressure range, and a second clutch actuation state, in which the actuation pressure is outside of the first actuation pressure range. The method further includes, during the first clutch actuation state, changing the electrical actuation variable based on the actuation pressure.
Claims18
A method for valve control of a hydraulic valve which, in an actuation device of a clutch, influences an actuation pressure for actuating the clutch in accordance with an electrical actuation variable that actuates the hydraulic valve, the method comprising:
- selectively switching the clutch-at least between a first clutch actuation state, in which the actuation pressure has a pressure value in a first actuation pressure range, and a second clutch actuation state, in which the actuation pressure outside of the first actuation pressure range,
- during the first clutch actuation state, changing the electrical actuation variable based on the actuation pressure, wherein a lower pressure value and an upper pressure value are defined within the first actuation pressure range based on the electrical actuation variable, and
- during the first clutch actuation state, at least one of:
- when the lower pressure value is reached, increasing an absolute value of the electrical actuation variable, and
- when the upper pressure value is reached, reducing an absolute value of the electrical actuation variable.
A hydraulic device, comprising:
- a pump;
- a clutch having an actuation device configured to switch the clutch at least between a first clutch actuation state and a second clutch actuation state;
- and
- a hydraulic valve arranged between the pump and the actuation device and actuatable via an electrical actuation variable, the hydraulic valve configured to influence an actuation pressure of the actuation device;
- wherein, in the first clutch actuation state, the actuation pressure of the actuation device has a first value that is within actuation pressure range, and, in the second clutch actuation state, the actuation pressure of the actuation device has a second value that is less than the first value;
- wherein, in the first clutch actuation state, the hydraulic valve is actuated, via a change in the electrical actuation variable, based on the first value, and wherein the hydraulic valve is a discharge valve, which is closed in the first clutch actuation state and open in the second clutch actuation state in order to reduce the actuation pressure.
Dependencies are inferred from the claim text.