Braking System, Vehicle Combination and Method of Operating the Same

A braking system for an electronic park brake control system or a global scalable air treatment system of a trailer-vehicle combination, comprising:

• at least one truck park brake chamber;
• at least one truck park brake supply port;
• at least one secondary supply port;
• at least one secondary supply valve;
• and
• at least one control valve,
• wherein the control valve comprises a fluid connection to the at least one truck park brake chamber, the at least one secondary supply valve and the truck park brake supply port,
• wherein the at least one secondary supply valve comprises a fluid connection to the secondary supply port and to the control valve,
• wherein the at least one secondary supply valve comprises a fluid connection to the at least one truck park brake chamber via the control valve such that the at least one truck park brake chamber is providable with pressure fluid via the truck park brake supply port and/or the secondary supply port, to allow for pressure fluid to be provided from a primary pressure fluid source via the truck park brake supply port and/or from a secondary pressure fluid source via the secondary supply port to the at least one truck park brake chamber.

A method for operating a braking system having:

• at least one truck park brake chamber;
• at least one truck park brake supply port;
• at least one secondary supply port;
• at least one secondary supply valve;
• and
• at least one control valve,
• wherein the control valve comprises a fluid connection to the at least one truck park brake chamber, the at least one secondary supply valve and the truck park brake supply port,
• wherein the at least one secondary supply valve comprises a fluid connection to the secondary supply port and to the control valve,
• wherein the at least one secondary supply valve comprises a fluid connection to the at least one truck park brake chamber via the control valve such that the at least one truck park brake chamber is providable with pressure fluid via the truck park brake supply port and/or the secondary supply port, to allow for pressure fluid to be provided from a primary pressure fluid source via the truck park brake supply port and/or from a secondary pressure fluid source via the secondary supply port to the at least one truck park brake chamber
• the method comprising the steps of:
• checking the fluid pressure between the truck park brake supply port and the control valve;
• detecting a loss of fluid pressure below a predeterminable threshold value, between the truck park brake supply port and the control valve;
• switching the at least one secondary supply valve such that a fluid connection between the secondary supply port and the control valve is provided;
• wherein pressure fluid is provided from the secondary supply port of the braking system via the control valve to the truck park brake chamber.