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2.1.10.12. VVT-i system (Intellectual management of gas distribution phases)

Fig. 2.49. Scheme of the VVT-i system


The VVT-i system (fig. 2.49) is intended for management of a cam-shaft of the drive of inlet valves in the wide range 50 ° (angles of rotation of a bent shaft) to provide the moment of opening or closing of the valve which optimum corresponds to operating conditions of the engine, carrying out thus increase in torque in all ranges of frequency of rotation and fuel profitability and reducing emissions of harmful substances with the fulfilled gases. The actual moment of opening or closing of the inlet valve is defined by the sensor of provision of a cam-shaft for constant comparison with the target moment of opening or closing of the valve and formation of the corresponding managing director of influence.