APRILIA Tuono V4 1100 Factory Service Station Manual page 511

Tuono V4 1100 Factory
1. Front system circuit
2. Front brake pump
3. Front brake lever
4. Rear system circuit
5. Rear brake pump
6. Rear brake pedal control
7. ABS control unit
8. Rear brake calliper
9. Front calliper (2 callipers)
10.Front brake circuit intake solenoid valve (normally open)
11.Rear brake circuit intake solenoid valve (normally open)
12.Rear brake exhaust circuit solenoid valve (normally closed)
13.Rear/front brake circuit low pressure accumulator
14.Front brake exhaust circuit solenoid valve (normally closed)
15.DC electric motor
16.Double circuit hydraulic pump (ABS)
Inlets and outlets:
1. Supply to the rear brake calliper.
2. Intake from the rear brake pump.
3. Inlet from front brake master cylinder.
4. Outlet to front brake calliper.
ABS OPERATION
General specifications:
The front circuit is similar to the rear circuit.
•
The ABS inlet valve (10 - 11) is normally open and it is closed only when the system inter-
venes to avoid wheel locking.
•
The exhaust valve (12 - 14) is normally closed and is only opened when the system inter-
venes to prevent locking.
•
With the system in stand-by mode, the ABS processor controls the wheel speed instant by
instant to assess any slippage of the wheels.
•
When in standby, the system does not intervene at all when the rider brakes; the braking
system is the same as the one without ABS.
Stages in ABS cycle (the following operations refer to the front circuit but are also applicable to
the rear one):
A - Brake activation: the rider starts braking as he would usually do.
Braking system
BRAK SYS - 511