HOW AIR BRAKES WORK

The animated display starts automatically. Click on individual diagrams to view each. Click on the animation link to restart the automatic display.

Image Name Number
Animation
Emergency - No Handle 1
Air Flow - Handle Off 2
Charge-1 3
Charge-2 4
Charge-3 5
Charge-4 6
Release - 1 7
Release -2 8
Service - 1 9
Service -2 10
Service - 3 11
Emergency - 1 12
Emergency -2 13

VALVE NAME CODE FUNCTION
Application Magnet AM or AMV When the Straight Air pressure increases, the AM valve energizes trainline electrical circuits that control each car's AM to feed supply air to SA, building pressure faster.
Release Magnet RM or RMV Opposite of AM. When SA pressure is released, the RM energizes RM trainline to quickly relase all train brakes.
Lockout LOV Locks out air pressure to Relay valve when dynamic brakes are working in each car.
Inshot IV Allows 5psi to flow to Brake Cylinders while dynamic brakes are working. Bypasses LOV.
Dynamic Brake Actuator DBA Uses the traction motors to generate electricity to slow train. The EMF force is proportional to the SA pressure adjusts the current. (See a good Physics book).
Double Check DCV Allows only Emergency vale or Straight air to feed Relay valve.
Charging Valve CV Keeps brakes on till Emergency valve builds to 25psi pressure. Helps feed EV slide.
Emergency Valve EV Main valve that aloows train to charge or go into emergency.
Emergency Contactor Closes circuit to give train operator indication if all of the side doors are also closed.
Piolt Valve PV Technical name for deadman's valve. This vents BP pressure if train operator become incapacitated.
Relay valve RV Connects supply air to Brake Cylinders based on pressure from DCV.
Variable Load VLV Adjusts pressure for SA applications above 50 psi to compensate for passenger loading in each car.
By-Pass BPV By-pass VLV for SA applications up to 50 psi.

Traction Power

Car Lights


- -


- The JoeKorNer