Pic. 2.12. Scheme of the valve drive mechanism: 1 – VVT-i regulator; 2 – a cam-shaft of a drive of inlet valves; 3 – a cam-shaft of a drive of final valves; 4 - exhaust valves; 5 - inlet valves; 6 - chain damper; 7 - chain guide shoe;
Each cylinder is equipped with 2 intake and 2 exhaust valves. The intake and exhaust efficiency is increased due to the large flow sections of the valves. The valves are opened and closed directly by 2 camshafts. The intake and exhaust camshafts are driven by a chain. The VVT-i system for the intake camshaft is used to ensure high fuel efficiency, engine performance and reduce harmful exhaust emissions. Valve lifters without shims are used.