| 摘要 |
The invention relates to a trailer control valve for a dual line brake system. The trailer control valve has a first relay piston (48) and a second relay piston (7, 8, 23), comprising two relay piston parts connected in series and fixed to one another. In the second relay piston a combined inlet and outlet valve (45, 6, 4) is arranged, by way of which a pressure medium inlet chamber (38) can be connected to a pressure medium outlet chamber (5), connected to a pressure medium outlet (10), as a function of the position of the first relay piston (48). A first supply connection (41) is connected to a second supply connection (14) by way of the pressure medium inlet chamber (38). In order, in the event of a fall in pressure on the pressure medium outlet and on the pressure medium inlet caused by a breakage of the trailer brake line connected to the pressure medium outlet (10), to restrict the supply of pressure medium to the pressure medium outlet and to the supply connection, a control piston (15) is arranged between the first relay piston part (7, 8) of the second relay piston (7, 8, 23) and a wall (18) provided in the housing, the active surface of which control piston facing the first relay piston part (7, 8) can be acted upon by the pressure from the pressure medium inlet chamber (38) and the active surface of which remote from the pressure medium inlet chamber (38) by a control pressure from a control chamber (32) defined by the control piston (15). Between the first supply connection (41) and ... Original abstract incomplete. <IMAGE>
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