BMW 11127588249 Cylinder Head

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The N52 engine utilizes an AluSil cylinder head with a cast bridge for mounting the Valvetronic actuator motor. It is equipped with compact, infinitely variable vane-type VANOS units for both intake and exhaust camshafts. The VANOS system, an acronym derived from the German words VAriable NOckenwellen Steuerung, electrohydraulically adjusts valve timing to enhance mid-range performance and improve emissions. The system is controlled by the engine control module (ECM), which uses engine speed, engine load, and engine coolant temperature as the primary inputs, with engine oil pressure powering camshaft adjustment. The N52 engine load is controlled via the valve timing gear through a system called Valvetronic, which varies valve lift rather than throttle valve opening to control engine power and torque. This system increases engine efficiency, improves emission values, allows a top engine speed to 7,000 rpm, and provides a power output of 85 hp/ liter displacement. It also offers engine torque of 100 Nm/ liter displacement over a broad engine speed range and reduces CO2 emissions.