Hydraulic control system for automatic gear-box in vehicle, has park-blocking control device connected with park-mechanism to prevent that park-mechanism displaces gear box during stop-start event of engine in parking condition

摘要

The system has a pressure controller-sub system supplying hydraulic fluid standing under pressure. A park-mechanism (180) is provided in downstream fluid connection with a park-supplying valve arrangement and a mode valve arrangement. The park-mechanism is aligned to park a gear-box in a condition. A park-blocking control device is connected with the park-mechanism to prevent that the park-mechanism displaces the gear box during a stop-start event of an engine in the parking condition. A park-sensor arrangement (201) comprises a hall-effect sensor switch (202) and a magnet arrangement (203).