Dump Mode (Pressure Decrease)

Dump Mode (Pressure Decrease):

DUMP CARTRIDGE - PURPOSE
Once the pressure is isolated, it must be reduced to get the wheels rolling once again. This is accomplished by dumping a portion of the brake fluid pressure into a Low Pressure Accumulator (LPA).

DUMP CARTRIDGE - OPERATION
The Electronic Brake Control Module (EBCM) energizes the dump cartridge coil(s) to open the dump cartridge, allowing fluid from the wheels to be dumped into the LPA. This is done with very short activation pulses opening and closing the dump cartridge passageway. Brake pressure is lowered at the wheel and allows the affected wheel to begin rolling again.

LOW-PRESSURE ACCUMULATOR - EXCESS FLUID STORAGE
The fluid taken from the wheels forces a spring back and is stored in the LPA at approximately 150 psi. A portion of the fluid also primes the pump so it can begin building reapply pressure. The dump cartridges are opened independently to control the deceleration of the wheel.