BMW X-Drive 4X4 How It Works
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The BMW X-Drive 4×4 is this company’s 4 unique wheel drive system. The system is electrically composed of the DC electric servo motor, incremental or position sensor, classification resistor, and related circuitry to detect current flow through the electric motor. Here are the operating parameters for each of these components.
Electric servo motor and incremental sensor: The electric servomotor is a DC motor. The incremental or position sensor inside the electric servo motor is used to record the adjustment rate and position of the servo motor shaft. The recorded data is necessary to activate and control the multi-plate clutch.
Classification resistor: the locking torque characteristic curve of the multi-plate clutch may vary slightly, due to mechanical tolerances during manufacture and the different models of vehicle. The characteristic curve actual value for a transfer case is recorded by means of a clutch test procedure after manufacture. The actual value is compared with a ….
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Post time: Jul-29-2017