Parking lock actuation system and automatic gearbox for a vehicle

A parking lock actuation system for an automatic gearbox of a vehicle, having a closed state in which a piston rod of a hydraulic cylinder is in a first position urging a locking pawl to block a gear of the automatic gearbox, and an open state in which the piston rod of the hydraulic cylinder is in a second position preventing the locking pawl from engaging the gear of the automatic gearbox, the parking lock actuation system further comprising:

• a first hydraulic valve being connected to a first hydraulic line, to a pressure source and a substantially non-pressurized reservoir, and
• a second hydraulic valve being connected to a first volume of the hydraulic cylinder, to the first hydraulic line and a non-pressurized reservoir,
• wherein the first hydraulic valve comprises a linear actuator in the form of an electric motor, and an actuation rod connected to the electric motor by a thread.