Abs Operation - MOTO GUZZI Stelvio 1200 NTX ABS Service Station Manual

Braking system
16) Front inlet valve
17) Rear inlet valve

ABS OPERATION

General specifications:
•
The front circuit is similar to the rear circuit.
•
The ABS inlet valve (16 - 17) is normally open and it is closed only when the system inter-
venes to avoid wheel locking.
•
The outlet valve (14 - 15) is normally closed and it is opened only when the system intervenes
to avoid wheel locking.
•
When the system is in standby, the ABS processor never stops monitoring the speed of the
wheels in order to assess potential wheel slippage.
•
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 operates the brakes as per a usual braking.
B - Danger situation detected (10% wheel skidding): the system closes the inlet valve (16) and opens
the outlet valve (14) temporarily. At this stage the rider cannot increase the pressure on the callipers
(4) and the system reduces the pressure on the callipers (4) partially. The excess fluid temporarily fills
the front reservoir (12) until the ABS pump (11) self-activates and delivers the fluid back to the reservoir
(5).
C - Pressure maintained: the pressure in the callipers (4) remains low until the total recovery of speed /
wheel grip. The system restores the fluid taken from the callipers (4) in the section of the system between
the brake pump (5) and the ABS inlet valve (16).
D - Pressure restored: by opening the inlet valve (16) momentarily, the pressure in callipers (4) is
increased until maximum deceleration is reached. Then, the system gives the control over the braking
back to the rider.
E - If the wheel does not reach complete grip, the system continues operating as before until complete
grip is obtained or until the vehicle stops.
Revente Interdite - Revendita Vietata - Resaling Forbiden - Wiederverkauf Verboten
BRAK SYS - 246
Stelvio 1200 NTX ABS