Abstract: A control valve assembly for a hydraulic braking system of a vehicle connected to a trailer has a hydraulic control solenoid valve and a hydraulic control valve, connectable to a pressure source and to a brake fluid reservoir mounted on board the vehicle, and configured to receive a brake fluid from the pressure source, a control line and a supplementary control line that respectively connect the hydraulic control solenoid valve and the hydraulic control valve to at least one trailer brake. A hydraulic emergency solenoid valve on the supplementary control line, interposed between the hydraulic control valve and the at least one trailer brake, is connectable to the brake fluid reservoir so that when activated, a pressure in the supplementary control line is reduced, activating the at least one trailer brake in an emergency braking.

Abstract: The invention concerns a Hall effect linear position sensor for a motor vehicle, in particular for a clutch master cylinder for a motor vehicle, comprising a piston (20) movable in translation in relation to a fixed part of the position sensor, either the piston (20) or the fixed part comprising a magnet (22) with diametrical magnetization received in a housing (24), and either the piston (20) or the fixed part comprising a magnetic field detection circuit, the magnet (22) and the housing (24) being shaped so as to enable the insertion of the magnet (22) in the housing (24) only in the angular positions of the magnet in which, when the magnet (22) is axially level with the detection circuit, the direction of the magnet (22) at the detection circuit is substantially parallel to the direction of the field lines in the magnet (22).