Oasis S L4-2253cc 2.3L SOHC VTEC MFI (1998)
Hydraulic Control Assembly - Antilock Brakes: Description and Operation
IN: Inlet Valve (Normally Open). OUT: Outlet Valve (Normally Closed)
The ABS modulator consists of the inlet solenoid valve, outlet solenoid valve, reservoir, pump, pump motor and the damping chamber. The modulator
reduces the caliper fluid pressure directly. It is a circulating-type modulator because the brake fluid circulates through the caliper, reservoir and the
master cylinder.
The hydraulic circuit is the independent four channel-type, one channel for each wheel.
The hydraulic control has three modes: pressure reduction, pressure retaining and pressure intensifying.
Pressure Intensifying Mode:
-
Inlet valve open, outlet valve closed
-
Master cylinder fluid is pumped out to the caliper.
Pressure Retaining Mode:
-
Inlet valve closed, outlet valve closed
-
Caliper fluid is retained by the inlet valve and outlet valve.
Pressure Reduction Mode:
