A system to control valves of an internal combustion engine. Electromechanical valves are controlled in a manner to reduce hydrocarbon emissions of an internal combustion engine. Further, the system may contain both mechanical and electromechanical valves to reduce cost and increase performance.

 
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< System and method for improving VCT closed-loop response at low cam torque frequency

< Variable CAM timing (VCT) system having modifications to increase CAM torsionals for engines having limited inherent torsionals

> Valve timing adjusting device and assembly apparatus of the same

> Driving apparatus and valve lift adjusting apparatus using the same
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