Electronic Variable Geometry Turbocharger (Vgt) Control Valve

Electronic Variable Geometry Turbocharger (VGT) Control Valve

Electronic Variable Geometry Turbocharger (VGT) Control Valve:

The Electronic Variable Geometry Turbocharger (VGT) Control Valve is a four-way proportional hydraulic flow control valve with closed center position. The valve controls linear actuator position of a closed loop hydraulic servo by charging and venting flow on both sides of a piston. Linear displacement feedback from the actuator varies a feedback spring force to move the valve spool to the center closed position when the actuator reaches the desired position. Therefore, actuator position is dependent only on control valve current - it is independent of hydraulic fluid temperature and viscosity. The PCM characterizes the VGT/turbocharger at idle with the engine at normal operating temperature. It is possible to force a learn sequence by clearing the DTC's and allowing the engine to idle for 5 minutes at normal temperature. Audible noise is possible during the learn cycle.