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Home >> Kia >> 2012 >> Optima Hybrid >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Active Hydraulic Booster (AHB) System - HEV >> Description and Operation >> Description >> AHB System Operation Principals >> 3. RBCS Function

3. RBCS Function

When the regenerative brake cooperation system (RBCS) is engaged, the NO VALVE 1, 2 and NC VALVE 1, 2 control the amperage to reduce or increase the pressure in the boosting chamber that operates regenerative braking.

When the hydraulic braking pressure increases, regenerative braking decreases from the total brake force (driver required brake force). When the hydraulic braking pressure decreases, regenerative braking force increases. As a result, the generated electricity also increases.

AHB System NO VALVE 1 NO VALVE 2 NO VALVE 3 NC VALVE 1 NC VALVE 2 * Motor
Mode Amp Control Amp Control ON(closed) Amp Control Amp Control ON
NOTE:
  • Motor: when charging Accumulator
Fig 1: AHB System Operation Diagram - RBCS Function
G08308657Courtesy of KIA MOTORS AMERICA, INC.