Pressurized State - Yamaha 2003 FJR1300 Service Manual

ANTI-LOCK BRAKE SYSTEM (FJR1300A)

2) Pressurized state

Port D A is closed by the "pressurization" signal transmitted from the ECU (ABS). Before this
occurs, the spool of the flow control valve has compressed the return spring to close port B 9.
Brake fluid that has entered through port A 7 is further restricted by the orifice 0 and the brake
fluid is sent to the brake calipers via port A 7 and port C C. At this time, the brake is pressurized
at a constant speed regardless of the brake fluid pressure level since restriction of port A 7
changes so that a constant pressure difference is maintained between chamber A J and cham-
ber B K of the flow control valve.
1 Brake master cyl-
inder
2 Brake light switch
3 ABS motor
4 Pump
5 Buffer chamber
6 Flow control valve
7 Port A
8 Spool
9 Port B
0 Orifice
A Port D
– 73 –
CHAS
B Solenoid valve
C Port C
D Brake caliper
E ECU (ABS)
F ABS warning light
G Brake fluid pres-
sure
H Time
I Repressurizing
J Chamber A
K Chamber B