法维莱制动系统培训课件
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LOCO CHINE
BRAKE SYSTEM
HXD2 Locomotives
June 2007
General data of the locomotive
Normal service : 2 locomotives coupled together
Locomotive 1 : master(generator of BP pressure active)
Locomotive 2 : slave(generator of BP pressure no active)
June 2007
Type of brakes
•Pneumatic friction brake
•Electro-dynamic brake
•Automatic parking
brake
The pneumatic friction brake is controlled by the driver’s brake valve (Eurotrol).
June 2007
Brake systems
Dual brake pipe modes
•Passengers (brake pipe 6 bar)
•Freight (brake pipe 5 bar )
Dual brake modes
•Gradual control
•Direct mode release
June 2007
Brake commands
June 2007
LOCOTROL System
•Multiple unit control system, installed on all units (leading & remote)•All traction and braking commands on the leading locomotive are transmitted to the others through the LOCOTROL system
June 2007
June 2007
•
Generic hardware & software platform called Gemini II •
Controls the pneumatic equipment of the Eurotrol •Interfaced through :
– A FIP bus to the train computer
– A RS422 link to the LOCOTROL
•Based on :
–Time dependent inputs from the indirect brake manipulator –Brake demand from LOCOTROL system
BCU
BCU
June 2007
Brake system •dcwv
June 2007
Brake system •Block scheme
June 2007
June 2007
•
Receives its input from the BCU •Modulates the BP pressure
–Calculates the internal pressure valve RE
–Activates the control valves in a closed loop to obtain the desired pilot
pressure RE
EUROTROL
EUROTROL •First brake step pressure
June 2007
EUROTROL •Brake application
June 2007
EUROTROL •Brake release
June 2007
EUROTROL •Stabilisation after braking or releasing
June 2007
EUROTROL •Quick release
June 2007
EUROTROL •Emergency brake
June 2007
EUROTROL •Neutralisation
June 2007
June 2007
•
One distributor valve group per locomotive •This module :
–Realises the automatic pneumatic brake,
–Distributes air in the RA
Distributor valve group
•
Distributor SW4 G/P mode •Operation mode lever (management of BP reference pressure) :
–M (freight) position : P BP = 500kPa
–V (passenger) position : P BP = 600kPa
•
2 release modes : gradual & direct release ( RB(IS)RC cock position )
June 2007
•
Cock RB(IS)RC open (switch closed)•
Carried out in large flow (manipulator in GD position)•
Only if P BP > 300kPa •If VV(RT)RC detects
a ΔP > 20kPa
between BP & R(T)
↘RC discharge itself
inside BP
↘The distributor is able to release the brake more quickly Direct release mode
Brake release