Method of pressure control for motor vehicle semi-trailer brakes

摘要

The method involves automatic pressurisation and depressurisation of the pneumatic suspension at the moment of during uncoupling when the brakes are released even if the parking brake of the tractor vehicle are prior to locking. The system is automatically repressurised during reattachment of the trailer. A two way valve (33) is positioned between the levelling valve and the suspension struts (7) and actuated by the direct brake line (9).