Brake valve for a compressed air brake system of a commercial vehicle, wherein the brake valve can be actuated by a brake pedal and is intended to output an analog brake valve output pressure and useful electrical sensor signals (Sla, S1b), in each case as a function of the actuation of the brake pedal, wherein the brake valve has a compressed air inlet for connection to a system pressure, a compressed air outlet for the connection of a brake control line, at least one sensor (18; 18a, 18b) for determining a brake valve actuation travel of an actuating element of the brake valve that is operatively connected to the brake pedal, and a characteristic curve memory device containing at least two stored characteristic curves (KLa, KLb) and/or dependences (P1-BSW, SP-BSW), as well as at least one determination device (20; 20a, 20b), and is intended to output a first useful sensor signal (S1a), which represents the brake valve output pressure, and - the at least one sensor (18; 18a, 18b) is designed to generate an actuation signal (S5; S5a, S5b) as a function of the brake valve actuation travel of the actuating element, and - the at least one determination device (20; 20a, 20b) is designed to generate the first useful sensor signal (S1a) from the at least one actuation signal (S5; S5a, S5b) as a function of the at least two characteristic curves (KLa, KLb) and/or dependences (P1-BSW, SP-BSW) stored in the characteristic curve memory, characterized - in that the brake valve is further intended to output a second useful sensor signal (S1b), which represents a percentage actuation position of the actuating element, - in that the at least one determination device (20; 20a, 20b) is designed to generate the first useful sensor signal (S1a) from the at least one actuation signal (S5; S5a) as a function of a brake valve pressure characteristic curve (KLa) and/or a pressure-travel dependence (P1-BSW) stored in the characteristic curve memory, and to generate the second useful sensor signal (S1b) from the at least one actuation signal (S5; S5b) as a function of a brake valve position characteristic curve (KLb) and/or a position-travel dependence (SP-BSW) stored in the characteristic curve memory, - in that the at least one determination device (20; 20a) is designed to associate the first useful sensor signal (S1a) with the at least one actuation signal (S5; S5a) via the stored brake valve pressure characteristic curve (KLa) and/or the pressure-travel dependence (P1-BSW), wherein the first useful sensor signal (S1a) represents the analog-controlled brake valve output pressure, - and in that the stored brake valve pressure characteristic curve (KLa) and/or the pressure-travel dependence (P1-BSW) indicates a non-linear relationship between the brake valve output pressure and the brake valve actuation travel, and the stored brake valve position characteristic curve (KLb) and/or the position-travel dependence (SP-BSW) indicates a linear relationship between the percentage actuation position and the brake valve actuation travel. - the at least one sensor (18; 18a, 18b) is designed to generate an actuation signal (S5; S5a, S5b) as a function of the brake valve actuation travel of the actuating element, and - the at least one determination device (20; 20a, 20b) is designed to generate the first useful sensor signal (S1a) from the at least one actuation signal (S5; S5a, S5b) as a function of the at least two characteristic curves (KLa, KLb) and/or dependences (P1-BSW, SP-BSW) stored in the characteristic curve memory, characterized - in that the brake valve is further intended to output a second useful sensor signal (S1b), which represents a percentage actuation position of the actuating element, - in that the at least one determination device (20; 20a, 20b) is designed to generate the first useful sensor signal (S1a) from the at least one actuation signal (S5; S5a) as a function of a brake valve pressure characteristic curve (KLa) and/or a pressure-travel dependence (P1-BSW) stored in the characteristic curve memory, and to generate the second useful sensor signal (S1b) from the at least one actuation signal (S5; S5b) as a function of a brake valve position characteristic curve (KLb) and/or a position-travel dependence (SP-BSW) stored in the characteristic curve memory, - in that the at least one determination device (20; 20a) is designed to associate the first useful sensor signal (S1a) with the at least one actuation signal (S5; S5a) via the stored brake valve pressure characteristic curve (KLa) and/or the pressure-travel dependence (P1-BSW), wherein the first useful sensor signal (S1a) represents the analog-controlled brake valve output pressure, - and in that the stored brake valve pressure characteristic curve (KLa) and/or the pressure-travel dependence (P1-BSW) indicates a non-linear relationship between the brake valve output pressure and the brake valve actuation travel, and the stored brake valve position characteristic curve (KLb) and/or the position-travel dependence (SP-BSW) indicates a linear relationship between the percentage actuation position and the brake valve actuation travel.