Hydraulic adjustment for vehicle head lights - has one operating and two actuating double acting cylinders connected in series

摘要

The two actuating cylinders adjust the reflector angle and are controlled by the operating cylinder. Each of the three cylinders contains a piston which divides the cylinder into two chambers. Each chamber of one cylinder is connected with one chamber of another cylinder such that three hydraulic columns are created, which are statically connected in series and not pressurised. The first hydraulic connection preferably runs from a first chamber in the operting cylinder to a first chamber in the actuating cylinder of the first reflector, whilst the second hydraulic connection runs from the second chamber of the actuating cylinder of this reflector to a first chamber of the second actuating cylinder, and the third connection from the second chamber of this second cylinder to the second chamber of the operating cylinder. The operating cylinder may be manually controlled or automatically via level sensors on the vehicle axles.