Simulation and Analysis of Variable Valve System Based on Diesel Engine

Abstract:

The necessity and superiority of using variable valve system on diesel is described detailed. The design of electro-hydraulic variable valve drive system is introduced based on DK4A diesel engine, then the mathematical simulation model of the electro-hydraulic variable valve drive system is undertook by Simulink in order to study the movement of the intake valve. The results show the design of variable valve system can achieve the variable valve timing continuous vary in different engine speed and respond quickly. Further, the simulation model of the diesel engine is built by GT-POWER, and then the accuracy of the model is verified according to the experiment data. Lastly the intake performance of the variable valve system in different out flowing phase is analyzed through the GT-POWER model. The results show that when the engine speed at 2000RPM, 2800RPM, 3600RPM, out flowing phase behind 60oCA, 45oCA, 35oCA after intake TDC respectively ,the amount of intake air decreases with the increase of the out flowing phase, the amount of intake air has been effectively controlled by variable valve system.

• Periodical: Applied Mechanics and Materials (Volumes 556-562)
• Pages: 1271-1277
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.556-562.1271
• Online since: May 2014
• Authors: Long Yin*, Dong Jian Zeng, Yi Zeng Peng
• Keywords: Intake Air, Simulation, Valve Lift, Variable Valve System

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