Fig. 2.20. Valvate mechanism of engines of the Mazda 3 car: 1 – cam-shaft; 2 – gas distribution mechanism drive chain; 3 – camshaft asterisk; 4 – lever of a natyazhitel; 5 – natyazhitel of a chain; 6 – pulley of a bent shaft; 7 – sending to a chain; 8 – valvate knot; 9 – cam; 10 – the oil operating valve (OCV); 11 – executive mechanism of system of change of phases of gas distribution

Each cylinder has two inlet and two final channels. 16 valves are directly put in action by two cam-shafts. On engines of the L3 model the mechanism of change of phases of gas distribution which provides the best moment of opening or closing of valves is used, depending on traffic conditions constantly changing phases of a cam-shaft of inlet channels (fig. 2.20).

Fig. 2.21. Chart of opening and closing of the valve of engines of the Mazda 3 car: 1 – VMT; 2 – variable area; 3 – release; 4 – admission; 5 – NMT