System for controlling continuous variable valve lift actuator of diesel engine, and method thereof

A system for controlling a continuous variable valve lift actuator (CCVA) of a diesel engine, comprising:

• a driving condition detecting portion that detects driving conditions of a vehicle;
• a temperature detecting portion that detects temperature of an exhaust gas at predetermined locations on an exhaust pipe;
• a nitrogen oxide (NOx) detecting portion that detects NOx concentration contained in the exhaust gas;
• a combustion pressure detecting portion that detects combustion pressure in a combustion chamber;
• a valve position detecting portion that detects positions of intake and exhaust valves, lift and timing of which are varied continuously;
• a control portion recognizing a driving purpose based on the driving conditions and combustion state of the engine based on the temperature of the exhaust gas and the NOx concentration, determining target position and timing of the intake and exhaust valves according to the driving purpose and the combustion state by applying a predetermined map table, and variably controlling the positions and timing of the intake and exhaust valves;
• and
• an actuator operating the intake and exhaust valves according to control signal of the control portion.