Dump Mode
ABS OPERATION - DUMP MODE
| Solenoid valve | State | Valve | Passage | Pump motor |
|---|---|---|---|---|
| IN (NO) | ON | CLOSE | Master cylinder <==> Wheel cylinder | ON |
| OUT (NC) | ON | OPEN | Wheel cylinder <==> Reservoir |
Under the emergency braking, if the wheels start to lock up, HECU sends a signal to the solenoid valve to decrease the brake fluid, then voltage is supplied to each solenoid. At this time inlet valve is closed and brake fluid is blocked from the master cylinder. Conversely outlet valve is opened and brake fluid passes through wheel cylinder to reservoir, resulting in pressure decrease.