Patent ID: 7347506

Claim:
An arrangement for activating an emergency brake ( 8 ; 8 ′) within a vehicle ( 1 ), the function of which is dependent upon a malfunction detection in a regular brake system of the vehicle, the arrangement comprising: a first brake circuit and a second brake circuit; and an emergency brake activation means ( 16 ; 24 , 25 , 26 ) for activating the emergency brake ( 8 ; 8 ′) if a pressure (p 1 ) in the first brake circuit simultaneously falls below a first limit value (p 1G ) when a pressure (p 2 ) in the second brake circuit falls below a second limit value (p 2G ), said emergency brake activation means ( 16 ; 24 , 25 , 26 ) comprising a first sensor ( 20 ; 20 ′) configured to detect if pressure (p 1 ) in the first brake circuit falls below the first limit value (p 1G ) and a second sensor ( 21 ; 21 ′) configured to detect if pressure (p 2 ) in the second brake circuit falls below the second limit value (p 2G ), the first pressure sensor ( 20 ; 20 ′) being connected to a first valve ( 18 ) and configured to assume a first position when the pressure (p 1 ) in the first brake circuit falls below the first limit value (p 1G ) and the second pressure sensor ( 21 ; 21 ′) being connected to a second valve ( 19 ) and configured to assume a first position when the pressure (p 2 ) in the second brake circuit falls below the second limit value (p 2G ), said first and second valves ( 18 , 19 ) being connected to a third valve ( 23 ) adapted to assume a position for actuating said emergency brake ( 8 ; 8 ′) when the first valve ( 17 ) is in said first position and the second valve ( 18 ) is in said first position.