Yamaha FJR1300A Service Manual page 27

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
Emergency braking (ABS activated)
1. Depressurized state
When the front wheel is about to lock, port D "11" of the solenoid valve is opened by the "depressur-
ization" signal transmitted from the ABS ECU. When this occurs, the spool of the flow control valve
compresses the return spring and closes port B "9". Brake fluid that has entered through port A "7"
is restricted by the orifice "10" and the brake fluid is sent to the brake caliper via port C "13" and to
the buffer chamber via port D "11". 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 hy-
draulic pump linked to the ABS motor.
1. Brake master cylinder
2. Brake light switch
3. ABS motor
4. Hydraulic pump
5. Buffer chamber
6. Flow control valve
7. Port A
8. Spool
9. Port B
10. Orifice
11. Port D
12. Solenoid valve
13. Port C
14. Brake caliper
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15. ABS ECU
16. ABS warning light
17. Brake fluid pressure
18. Time
19. Repressurizing
1-18
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