Brake trains

However, when reducing the pressure in the brake line for the complete inhibition should be considered prior to braking and managed a brake system fully charged before the charging pressure. In addition, heavy freight trains is important pressure difference between the head and tail parts of the highway, which can reach 1,0-1,2 kg/cm2, ie, in this case at a charging pressure of 6,0-6,2 kg/cm2, supported by a crane driver, the tail diffusers are charged only to 4,8-5,0 kg/cm2, and to move their main pistons in the position of full braking pressure in the line at the rear of the train must be reduced to a pressure of 3,5-3, 7 kgf/cm2.

When complete the service braking passenger trains in the brake line pressure should not fall below 3.5 kgf/cm2. If repeated braking on the descent to obtain the necessary efficiency of the driver lowered the pressure below 3.5 kg/cm2, the inhibition should be brought to a train stop actuated brake to keep the train engine, then release the automatic brakes and braking to charge the net to the set pressure. If you drop the line pressure below 3.5 kg/cm2, but not less than 3.2 kgf/cm2 happened at the end of the descent and then under the terms of the profile will need to let go until the next automatic brakes and braking will be enough time to fully charge the inhibitory network in the movement of trains, then stop the train for charging the brakes should not be.

For full service freight train braking equalization tank valve driver discharged to 1,5-1,7 kg/cm2. The maximum allowable reduction in pressure should not exceed 2 kgf / cm 2 at normal charging pressure, ie, the pressure in the brake line with full braking should not be set lower than 3,3-3,5 kg/cm2. If complete inhibition is preceded by release of the brakes over-line pressure and the need for complete inhibition occurred when not yet completed the transition to a normal pressure, reducing the line pressure must be increased accordingly sverhzaryadki level at the start of braking. Practically, in this case the pressure in the surge chamber should be reduced to 3,3 - 3,5 kgf/cm2 (especially considering that in this case, tail diffuser can be the beginning of the deceleration is to end the charging process).