US 12,013,034 B2
Park lock actuation system and method for operating a park lock actuation system
Felix Bunout, Karlsruhe (DE)
Assigned to Schaeffler Technologies AG & CO. KG, Herzogenaurach (DE)
Appl. No. 18/026,832
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Sep. 20, 2021, PCT No. PCT/DE2021/100767
§ 371(c)(1), (2) Date Mar. 17, 2023,
PCT Pub. No. WO2022/073542, PCT Pub. Date Apr. 14, 2022.
Claims priority of application No. 10 2020 126 523.9 (DE), filed on Oct. 9, 2020.
Prior Publication US 2023/0332685 A1, Oct. 19, 2023
Int. Cl. F16H 63/34 (2006.01)
CPC F16H 63/3483 (2013.01) [F16H 63/3433 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A park lock actuation system for a motor vehicle, having an actuating element, which can be coupled to a park lock and can be translated, by hydraulic actuation, from its locking position, in which the park lock is active, to its unlocking position, in which the park lock is inactive, as a result of a predefined first pressure value (p1) being exceeded, and having a blocking element, which can be moved, by hydraulic actuation, from its unblocking position, in which the actuating element can be moved between its locking position and its unlocking position, to its blocking position, in which the blocking element fixes the actuating element in its unlocking position in a form-fitting manner, as a result of a predefined second pressure value (p2) being exceeded, wherein the predefined second pressure value (p2) is higher than the predefined first pressure value (p1), wherein the blocking element is in the form of a transverse slide which can be moved radially with respect to a longitudinal axis of the actuating element, wherein the actuating element is connected for actuation thereof to a hydraulic actuating cylinder and the blocking element is connected for the actuation thereof to a hydraulic blocking cylinder, wherein the hydraulic blocking cylinder and the hydraulic actuating cylinder can be actuated via a common hydraulic supply, wherein the hydraulic blocking cylinder is connected to the hydraulic actuating cylinder via an orifice.