Emergency Braking (Abs Activated); Depressurizing Phase - Yamaha 2012 TMAX XP500A Service Manual

Emergency braking (ABS activated)

1. Depressurizing phase

When the front wheel is about to lock, the outlet solenoid valve is opened by the "depressuriza-
tion" signal transmitted from the ABS ECU. When this occurs, the inlet solenoid valve com-
presses the spring and closes the brake line from the brake master cylinder. Because the outlet
solenoid valve is open, the brake fluid is sent to the buffer chamber. As a result, the hydraulic
pressure in the brake caliper is reduced.
The brake fluid stored in the buffer chamber is pumped back to the brake master cylinder by the
hydraulic pump linked to the ABS motor.
1. Brake master cylinder
2. Brake light switch
3. ABS motor
4. Hydraulic pump
5. Buffer chamber
6. Outlet solenoid valve
7. Inlet solenoid valve
8. Brake caliper
9. Wheel sensor
10.ABS ECU
11.ABS warning light
12.Brake fluid pressure
13.Time
1-23
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