2.5.2.7. Control of the mechanism of change of phases of gas distribution

Control of the mechanism of change of phases of gas distribution of Mazda 3 (GG) is in essence taken over from the modern MX-5 (NB) model, except for the mode of cleaning and the mode of the maximum delay for coordination with characteristics of the vehicle.

Cleaning mode conditions following:

– reduction of frequency of rotation of the engine when closing with a butterfly valve;

– frequency of rotation of the engine – between 2250 ^min.-1 and 3500 ^min.-1;

– temperature of cooling liquid – above 80 °C the maximum delay;

Besides, any of the following conditions has to be executed:

– start;

– frequency of rotation of the engine – is lower than 970 ^min.-1;

– temperature of cooling liquid – is below 18 °C;

– the target moment of opening or closing of the valve – 0;

– reduction of torque.