Optimized design and simulation of full variable valve actuation for diesel engine

摘要

Variable valve timing technologies in internal combustion engines are used to improve power, torque, and increase fuel efficiency. Such systems are primarily aimed at increasing performance. This paper presents full flexible variable valve actuation and internal-feedback control design, unlike existing electromechanical valve actuation systems, precise valve motion control is achieved with a valve lift displacement feedback. For proving the actuation performance and investigating the performance on diesel engine, combined simulation models for full variable valve actuation and CY4102 diesel engine which is used for shipping, are built based on the AMESim, Simulink, and GT-power. Advantages in terms of power, torque, and brake thermal efficiency are compared with baseline results through combined simulation. Modeling and simulation results show perfect controlling for full variable valve system on CY 4102 diesel engine and significant advantages of the full variable valve motions over standard cam drives.