| 摘要 |
PURPOSE:To reduce a power loss in a pressure air source, by making the pulsation of air spring pressure during vehicle running absorbable, in case of a braking device for the rolling stock. CONSTITUTION:A condenser C1 is being connected in parallel to an input resistor 5 of an amplifier AMP, while a condenser C2 is connected in parallel to a reset resistor 6 of the amplifier. A solenoid valve CV is demagnetized by an emergency brake command, interconnecting a balancing chamber 24 of a variable load vale VLV to an output chamber 22 and simultaneously intercepting the balancing chamber 24 from a feeding chamber 20. And, the solenoid valve is excited by a brake release command, intercepting the balancing chamber from the output chamber 22 and simultaneously interconnecting it to the feeding chamber 20. The output chamber 22 of the variable load valve VLV is connected to the other side input side of a double check valve serving as a high pressure reference valve PV. With this constitution aforesaid, a balancing piston is pressed by high pressure air against a spring, and the output chamber is interconnected to an exhaust chamber so that pulsation in an air spring during vehicle running is preventable. |
