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Home >> BMW >> 2012 >> 335xi Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Service Information - N55 Engine >> Engine Components >> Valvetronic III >> Valve Lift Adjustment Overview >> Function

Valve Lift Adjustment Overview: Function

Actuation of the Valvetronic servomotor is limited to a maximum of 40 amps. A maximum of 20 amps are available over a period of > 200 milliseconds. The Valvetronic servomotor is actuated by a pulse width modulated signal. The duty cycle is between 5% and 98%.

Fig 1: Identifying Valvetronic Servomotor Components
G06895981Courtesy of BMW OF NORTH AMERICA, INC.
INDEX EXPLANATION CHART

Index Explanation
1 Socket
2 Worm shaft
3 Needle bearing
4 Bearing cover
5 Magnetic sensor wheel
6 Rotor with four magnets
7 Sensor
8 Stator
9 Housing
10 Bearing