US 11,982,351 B2
Parking lock actuation system with a double-acting actuation cylinder on the locking element, and actuation method
Peter Greb, Ottersweier (DE); and Laszlo Man, Ottersweier (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 18/003,291
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Jun. 2, 2021, PCT No. PCT/DE2021/100479
§ 371(c)(1), (2) Date Dec. 23, 2022,
PCT Pub. No. WO2022/002297, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 10 2020 117 021.1 (DE), filed on Jun. 29, 2020.
Prior Publication US 2023/0243422 A1, Aug. 3, 2023
Int. Cl. F16H 63/34 (2006.01); F16H 63/48 (2006.01)
CPC F16H 63/3483 (2013.01) [F16H 63/483 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A parking lock actuation system for a motor vehicle, the parking lock actuation system comprising:
an actuation element coupleable or coupled to a parking lock, the actuation element being displaceable between a locking position, in which the parking lock is active, and an unlocking position, in which the parking lock is inactive; and
a locking element configured to fix the actuation element in the unlocking position in a form-fitting manner;
the actuation element and the locking element being each operatively connected to a respective hydraulic actuation cylinder, the hydraulic actuation cylinders being connected to a common hydraulic fluid supply line on a side of a respective pressure chamber and being coupled to a pump via a first valve, the hydraulic actuation cylinder of the locking element having an unlocking pressure chamber which counteracts the respective pressure chamber and which is coupleable to the pump via a second valve.