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In this video we describe the mechanical operation of the exhaust camshaft with the VAG Valvelift system. The system uses a series of electromagnetic actuators to move the camshaft. Using a power supply, we simulate the operation of the electromagnetic actuators. Then, using a current clamp, we connect the actuator to a Pico oscilloscope and analyze the signals it emits to understand its operation. CHAPTERS 00:00 Introduction 00:23 Description of the camshaft 05:15 Electromagnetic actuator 09:05 Electronic explanation of the operation of the actuator 11:50 Oscilloscope connections 14:29 Signal analysis with the oscilloscope