Mazda 2006 MX-5 - Page 255

DYNAMIC STABILITY CONTROL
04–15–9
04–15
During DSC control (suppress oversteer tendency)
• When a large oversteer 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,
supplying brake fluid pressure from the reservoir to the outer front wheel cylinder. Also at this time, the inlet
solenoid valve of the inner rear 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 (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
ON
(closed)
OFF
(closed)
ON
(open)
ON
(clos
ed)
OFF
(ope
n)
ON
(clos
ed)
OFF
(ope
n)
OFF (closed) Operating
During
pressure
maintain
mode
OFF
(open)
OFF
(closed)
OFF (closed)
OFF
(ope
n)
ON
(clos
ed)
OFF
(clos
ed)
ON
(ope
n)
OFF (closed) Operating
During
pressure
reduction
mode
OFF
(open)
OFF
(closed)
OFF (closed)
OFF
(ope
n)
ON
(clos
ed)
OFF
(clos
ed)
ON
(ope
n)
OFF
(clos
ed)
ON
(ope
n)
OFF
(clos
ed)
ON
(ope
n)
Operating
P
RF
LR
RR
LF
MASTER CYLINDER
TRACTION
CONTROL
SOLENOID
VALVE
BRAKE FLUID
PRESSURE SENSOR
STABILITY
CONTROL
SOLENOID
VALVE
INLET
SOLENOID
VALVE
INLET
SOLENOID
VALVE
OUTLET
SOLENOID
VALVE
OUTLET
SOLENOID
VALVE
DAMPER CHAMBER
RESERVOIR
PUMP
MOTOR
PUMP
PRESSURE
INCREASE
E5U415ZS5017