Brake controller Comeng

Question 1

What are the different valves in the brake controller on a comeng (7 answers)

Answer 1

Release prevention vlalve
Regulating valve
Relay valve
Charging valve
Emergency exhaust valve
Lockout magnet valve
BVICS

Question 2

What is the purpose of the release prevention valve?

Answer 2

Prevents release of the brakes whilst auto air braking

Question 3

What is the purpose of the regulating valve?

Answer 3

Regulates the brake pipe

It reduces MR air pressure to a control pressure. This is then duplicated in the equalising res. To a value between 380 - 410 kPa to up to 550 depending on the position of the brake handle.

Maintains B.P ⬆️ to 550 when brake is in R & R when using EP

Question 4

What is the purpose of the Lockout Magnet Valve?

Answer 4

Switches from EP/ Rheo to AUTO AIR brake when de-energised or OPEN
(When closed is energised)

Question 5

Control res provides air to what

Answer 5

Trip and line breakers

Question 6

LOMV raises flag when

Answer 6

Loss of overhead
Ep CB tripped
Air pressure in MR is below safe level (500kpa)

Question 7

What is the purpose of the charging valve?
(& Emergency Exhaust valve)?

Answer 7

Dumps brake pipe

Opens when brake is released to charge brake pipe

Question 8

What is the purpose of the BVICS?

Answer 8

Charges the brake pipe? (MR - BP)
Energizes the LOMV
DTRS
DDU

Question 9

What is the purpose of the relay valve?

Answer 9

It relays Equalizing reservoir to the Brake pipe

(It controls the flow of air into & out of the BP to a pressure set by the equalising reservoir