BENDIX ATR1DC ANTILOCK TRACTION RELAY Handmatig - Pagina 4
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EC-16
OR EC-17
CONTROLLER
SOLENOID
CONNECTOR
BLEND BACK
PISTON
DOUBLE
CHECK VALVE
"B"
RELAY PISTON
SUPPLY PORT
INLET-EXHAUST
VALVE
FIGURE 6 - SERVICE BRAKES RELEASING
to air pressure, the relay piston drain valve flexes and seals
the drain passage leading to the relay exhaust.
Simultaneously the relay piston moves into contact with the
exhaust portion of its inlet and exhaust valve. With the
exhaust passage sealed, continued movement of the piston
unseats the inlet portion of the inlet and exhaust valve,
™
™
EC-16
OR EC-17
CONTROLLER
SOLENOID
CONNECTOR
BLEND BACK
PISTON
DOUBLE
CHECK VALVE
"B"
RELAY PISTON
SUPPLY PORT
INLET-EXHAUST
FIGURE 7 - SERVICE BRAKES - APPLYING
4
TRACTION CONTROL SOLENOID
EXHAUST
PORT
TRACTION CONTROL SOLENOID
EXHAUST PORT
VALVE
(PRIMARY CIRCUIT DELIVERY FAILED)
SECONDARY
SERVICE PORT
PRIMARY
SERVICE PORT
DOUBLE
CHECK VALVE "A"
DELIVERY
PORT
allowing supply air from the reservoir to flow out the ATR-1DC
valve's delivery ports to the brake chambers.
SERVICE BRAKES - HOLDING
Air pressure being delivered to the brake chambers is also
present beneath the relay piston. When air pressure above
and below the relay piston is equal, the piston moves
SECONDARY
SERVICE PORT
PRIMARY
SERVICE
CONTROL LINE
FAILURE
DOUBLE
CHECK VALVE "A"
DELIVERY
PORT
BRAKE VALVE
(RELEASED)
AIR BAG
BRAKE
CHAMBER
WHEEL SPEED
TONE RING
SENSOR
BRAKE VALVE
(SHOWING
DELIVERY AIR
LINES ONLY)
AIR BAG
BRAKE
CHAMBER
WHEEL SPEED
TONE RING
SENSOR
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