US 12,449,007 B2
Method for controlling a hydraulic control device
Erhard Hodrus, Achern (DE); Christian Eberle, Bühl (DE); and Marian Preisner, Bühl (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 18/285,652
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Mar. 17, 2022, PCT No. PCT/DE2022/100208
§ 371(c)(1), (2) Date Oct. 5, 2023,
PCT Pub. No. WO2022/214129, PCT Pub. Date Oct. 13, 2022.
Claims priority of application No. 10 2021 108 559.4 (DE), filed on Apr. 7, 2021.
Prior Publication US 2024/0209906 A1, Jun. 27, 2024
Int. Cl. F16D 48/02 (2006.01)
CPC F16D 48/02 (2013.01) [F16D 2048/0221 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for controlling a hydraulic control device that can actuate a torque device, wherein the hydraulic control device includes a first actuating element configured to be acted upon by a first fluid pressure in a first fluid line and configured to actuate the torque device, a system pressure line hydraulically connected to the first fluid line and having a system pressure, a first valve element located between the first fluid line and the system pressure line and configured to set the first fluid pressure via the system pressure, and a supply element hydraulically connected to the system pressure line and configured to provide the system pressure, the method comprising:
setting the first fluid pressure based on a target torque value for the first actuating element, and
setting the system pressure above the first fluid pressure by a pressure difference based on a pressure control value, wherein the system pressure is set, at a first value of the pressure control value above the first fluid pressure by the pressure difference, and, at a second value of the pressure control value different from the first value, independently of the pressure difference.