| 摘要 |
The underlying idea of the invention is to reduce the pressure force resulting from the inlet pressure and the outlet pressure of the back-up valve and affecting the valve body of the back-up valve. The valve body is a switching piston with a first and second switching piston side. The first switching piston side is pressurized by brake operating valve pressure or with brake cylinder pressure and the second switching piston side is pressurized on a first partial surface with brake cylinder pressure and on a second partial surface with brake operating valve pressure. The pressures affecting both sides of the switching piston thus cancel each other out. |
