Mazda 2009 RX-8, Особенности сервиса, Страница: 151 / 299

DYNAMIC STABILITY CONTROL
04-15–9
04-15
During DSC control (to suppress understeer tendency) and TCS control
!
When a large understeer tendency is determined, the traction switch and the stability control solenoid valves
are energized, switching the hydraulic circuits. At the same time, the pump motor is actuated to operate the
pump, thereby increasing pressure by supplying brake fluid pressure to the caliper piston of the inner rear
wheel or the slipping driving wheel. Also at this time, the inlet solenoid valve of the outer front wheel is
energized and the hydraulic circuit of this wheel is closed.
!
After a pressure increase, brake fluid pressure is adjusted using the three pressure modes (reduction,
maintain, increase) so that the target wheel speed is obtained. (The following figure shows a left turn, or control
of left rear wheel spin (during pressure increase mode).)
Solenoid valve operation table
Hydraulic circuit diagram
Traction control
solenoid valve
Stability control
solenoid valve
Inlet solenoid valve Outlet solenoid valve
Pump
motor,
pump
LF—RR RF—LR LF—RR RF—LR LF RF LR RR LF RF LR RR
During
pressure
increase
mode
OFF
(open)
ON
(closed)
OFF
(closed)
ON
(open)
OFF
(ope
n)
ON
(clos
ed)
OFF
(open)
OFF
(clos
ed)
ON
(ope
n)
OFF
(closed)
Operating
During
pressure
maintain
mode
OFF
(open)
ON
(closed)
OFF (closed)
OFF
(ope
n)
OFF
(clos
ed)
ON
(clos
ed)
OFF
(ope
n)
OFF
(clos
ed)
ON
(ope
n)
OFF
(closed)
Operating
During
pressure
reduction
mode
OFF
(open)
ON
(closed)
OFF (closed)
OFF
(ope
n)
OFF
(clos
ed)
ON
(clos
ed)
OFF
(ope
n)
OFF
(clos
ed)
ON
(ope
n)
ON
(ope
n)
OFF
(clos
ed)
Operating
RF
LR
RR LF
P
MASTER CYLINDER
TRACTION
CONTROL
SOLENOID
VALVE
BRAKE FLUID
PRESSURE SENSOR
STABILITY
CONTROL
SOLENOID
VALVE
INLET
SOLENOID
VALVE
OUTLET
SOLENOID
VALVE OUTLET
SOLENOID
VALVE
RESERVOIR
PUMP
MOTOR
PUMP
PRESSURE
INCREASE
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