•  Variable tumble shutter valve switch monitors the actual opening/closing of the variable tumble shutter valve by detecting the rotation angle of the variable tumble shutter valve actuator.

•  The PCM performs optimized EGR control and ignition control according to the opening/closing of the valve.In addition, the PCM has a specification of approx. 20 ° from when the valve is fully closed (output voltage: approx. 2.8 V) to optimize the valve switching timing and engine control timing, and a valve operation angle of approx. 20 ° or less (output voltage: approx. 2.8 V or more) is determined as the closing area, and approx. 20° or more (output voltage: less than approx. 2.8 V) is determined as the opening area.

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1	Variable tumble shutter valve
2	Variable tumble shutter valve switch voltage characteristic
3	Valve opening angle
4	Voltage
5	Fully
6	Fully opened
7	Approx. 0.8 V
8	Approx. 2.8 V
9	Approx. 3.6 V