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1. (WO2017003349) PROCÉDÉ ET SYSTÈME PERMETTANT D’AMÉLIORER LA SÉCURITÉ POUR UN SYSTÈME DE FREINAGE DE VÉHICULE
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CLAIMS

1 . A method for improving safety for a vehicle (1 ) braking arrangement (10) having air circuits (C1 , C2, C3) for supplying compressed air for service brakes (42, 44) and parking brake (46), comprising the step of determining (S1 ) the compressed air pressure in the respective air circuits (C1 , C2, C3), characterized by the steps of:

- determining (S2) the order in which said air circuits (C1 , C2, C3) are pressurised for the respective circuits (C1 , C2, C3) during air pressure build up; and

- taking action (S3) if the parking brake air circuit (C3) is pressurised prior to any of the service brake air circuits (C1 , C2).

2. A method according to claim 1 , wherein the step of determining the order in which said air circuits (C1 , C2, C3) are pressurised for the respective circuits (C1 , C2, C3) comprises determining pressure build up to a certain pressure value.

3. A method according to claim 1 or 2, further comprising determining the relation between the pressure in said air circuits (C1 , C2, C3) and taking action if the relation between the pressure in said air circuits (C1 , C2, C3) does not fulfil certain criteria wherein said criteria comprises the pressure in at least one of the air circuits (C1 , C2) for service brakes (42, 44) has reached a certain pressure and/or the pressure in all circuits (C1 , C2) for service brakes (42, 44) has reached a certain pressure.

4. A method according to any of claims 1 -3, wherein the step of taking action comprises the step of informing the operator of the vehicle of the service brakes (42, 44) not being sufficiently pressurised or being incorrectly pressurised.

5. A method according to any of claims 1 -4, wherein the step of taking action comprises the step of preventing the vehicle from being driven.

6. A method according to claim 5, wherein the step of preventing the vehicle from being driven comprises the step of preventing deactivation of the parking brake (46), or activating the parking brake (46) if not activated.

7. A system (I) for improving safety for a vehicle (1 ) braking arrangement (1 0) having air circuits (C1 , C2, C3) for supplying compressed air for service brakes (42, 44) and parking brake (46), comprising means (1 10) for determining the compressed air pressure in the respective air circuits (C1 , C2, C3), characterized by means (1 20) for determining the order in which said air circuits (C1 , C2, C3) are pressurised for the respective circuits (C1 , C2, C3) during air pressure build up; and means (130) for taking action if the parking brake air circuit (C3) is pressurised prior to any of the service brake air circuits (C1 , C2).

8. A system according to claim 7, wherein the means (120) for determining the order in which said air circuits (C1 , C2, C3) are pressurised for the respective circuits (C1 , C2, C3) comprises means (122) for determining pressure build up to a specified pressure value.

9. A system according to claim 7 or 8, further comprising means (140) for determining the relation between the pressure in said air circuits (C1 , C2, C3) and taking action if the relation between the pressure in said air circuits (C1 , C2, C3) does not fulfil certain criteria, wherein said criteria comprises the pressure in at least one of the air circuits (C1 , C2) for service brakes (42, 44) has reached a certain pressure and/or the pressure in all circuits (C1 , C2) for service brakes (42, 44) has reached a certain pressure.

10. A system according to any of claims 7-9, wherein the means (130) for taking action comprises means (132) for informing the operator of the vehicle

(1 ) of the service brakes (46) not being sufficiently pressurised or being incorrectly pressurised.

1 1 . A system according to any of claims 7-1 0, wherein the means (130) for taking action comprises means (1 34) for preventing the vehicle (1 ) from being driven.

12. A system according to claim 1 1 , wherein the means (1 34) for preventing the vehicle from being driven comprises means (134a) for preventing deactivation of the parking brake (46) and means (134b) for activating the parking brake (46) if not activated.

13. A vehicle (1 ) comprising a system (I) according to any of claims 7-12.

14. A computer program (P) for improving safety for a vehicle braking arrangement, said computer program (P) comprising program code which, when run on an electronic control unit (100) or another computer (500) connected to the electronic control unit (1 00), causes the electronic control unit to perform the steps according to claim 1 -6.

15. A computer program product comprising a digital storage medium storing the computer program according to claim 14.