Turbocharger (TC) control system B6284T: Notes

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Fig 1: Identifying Turbocharger (TC) Control System B6284T

Courtesy of VOLVO CARS OF NORTH AMERICA.

Turbocharger (TC) boost pressure is Controlled By The Boost Pressure Control (BPC) valve whose pressure regulators are affected by the pressure from the turbocharger (TC). The Engine Control Module (ECM) receives information about current throttle angle, this in turn affects the boost pressure control. The Engine Control Module (ECM) affects the controlling pressure using the turbocharger (TC) control valve.

When the pressure increases the Boost Pressure Control (BPC) valve pressure regulators Are Affected. When boost pressure has increased to the maximum permissible value the Boost Pressure Control (BPC) valves open and part of the exhaust gases bypass the turbocharger (TC) turbines which limits the boost pressure. Turbocharger (TC) control is constant as a combination between the throttle angle and the turbocharger (TC) control valve opening to obtain the maximum calculated torque.