METHOD OF FILLING A CHAMBER OF A TRAILER SPRING BRAKE AND A TRAILER RESERVOIR WITH A AIR SUPPLIED BY A TRACTOR AND APPARATUS

摘要

Methods and valve (300) arrangements for controlling the flow of pressurized air from a tractor to a trailer reservoir (314) and to a trailer spring brake chamber (316). In one exemplary embodiment, pressurized air from a tractor is supplied from a tractor to the trailer reservoir (314) and to the trailer spring brake (316) in different filling modes based on a user input (310). In another exemplary embodiment, pressurized service air is used to charge or partially charge the trailer reservoir (314).