Hydraulic Control Assembly - Antilock Brakes: Description and Operation

The Brake Pressure Modulator Valve (BPMV) is part of the Electro-Hydraulic Control Unit (EHCU). The BPMV is the hydraulic portion of the EHCU and is controlled by the EBCM. The BPMV is split into three hydraulic channels; left front, right front and rear. Each channel has an isolation valve and a dump valve. The front channels share a low pressure accumulator, attenuator and pump. The rear channel also has a low pressure accumulator, attenuator and a pump. The rear brake channel of the BPMV controls both rear wheels simultaneously.