Trailer brake valve

A trailer brake valve (1) to be used in a compressed air brake system of a trailer including an anti lock control unit (37) and a load sensing control unit (26), comprising:

• a housing (2);
• a relay piston (3) being movably guided in said housing;
• a control chamber (4) being located in said housing on one side of said relay piston (3);
• a brake chamber (5) being located in said housing on the other side of said relay piston and including connections (31) for pneumatic conduits (32) leading to brake cylinders (33) of a brake system, said control chamber (4) and said brake chamber (5) being defined by said relay piston (3);
• a brake conduit (7) being connected to said control chamber (4);
• an inlet valve (43, 51) being located adjacent said reservoir chamber (47);
• an outlet valve (45, 54) being located in said housing;
• a first solenoid valve (8) adapted to control the control pressure prevailing in said brake conduit (7);
• a second solenoid valve (18) being designed and arranged to deaerate said control chamber;
• a first pressure/voltage converter (16) being designed and arranged to sense control pressure prevailing in said brake conduit (7) for detecting whether and which braking action is required;
• a second pressure/voltage converter (17) being designed and arranged to sense control pressure prevailing in a region on one of the sides of said relay piston (3) for detecting whether and which pressure is urging said relay piston (3);
• a load sensing control unit (26) being designed to detect the pressure of the bellows (30) and arranged to produce a load signal in response to the loading of the trailer with goods;
• and
• an independent electronic control unit (22) being designed and arranged to control said first and second solenoid valve with the load signal produced by said load sensing control unit (26) and not with an antilock signal produced by said antilock control unit (37).