| 摘要 |
Brake apparatus for a railway vehicle including a brake cylinder device of the type having a pair of interconnected pistons to which the vehicle brake rigging is connected, the larger piston having a pair of chambers formed on opposite sides in which air is stored, and a control valve device that is operative responsive to a reduction of brake pipe pressure to connect pressure from the one side of the larger piston to a corresponding side of the smaller piston to effect movement of these pistons to a brake application position and concurrently vents pressure in the chamber on the other side of the larger piston. A transfer valve device is provided to interrupt this exhaust of pressure from the chamber on the other side of the piston until the piston has moved to application position so that the chamber volume is minimal and thus renders a minimum amount of air exhaust sufficient to produce brake applying pressure differentials across this larger piston. |
