Design and Analysis of Electro-hydraulic Fully Variable Valve Actuation System

YANG Jing, WANG Zichang, WANG Yi, U Yangtao, Amir Khajepour, FENG Renhua


 In order to satisfy the requirements of design and performance of an internal combustion engine, all kinds of existing variable valve actuation systems were compared by analyzing their advantages and disadvantages, and a novel electro-hydraulic variable valve actuation system was then developed. Afterwards, a simulation model based on the mathematical and physical equations was developed through MATLAB/Simulink softwares, and the developed model was verified by experimental results. Furthermore, the effects of controllable parameters such as the phase angle difference between high and low pressure rotary valve, accumulator pressure and engine speed on maximum lift, valve open duration, and valve velocity and acceleration were investigated. The results showed that phase angle difference had limited influence on valve trajectory at the beginning section of lift, but changed the valve closing by altering valve open duration. The pressure of accumulator did not change the valve timing and its duration, but influenced significantly on the maximum valve lift. The maximum valve lift and valve closing were affected by the engine speed variance. Sectional area of valve lift decreased and valve closing delayed with the increasing engine speed.



Keywords: internal combustion engine,  variable valve timing,  variable valve lift,  valve velocity,  fluid control,  electro-hydraulic

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YANG Jing. DENG Banglin. et al. Thermal load analysis of engine piston combined experiment with simulation [J]. Journal of Hunan University: Natural Sciences. 2014, 41 (8):23 - 29. (In Chinese)

YANG Jing. FENG Renghua. DENG Banglin. et al. Improvement design fo gasoline engine cam profile[J]. Journal of Hunan University: Natural Sciences. 2009.36(11) ;21 - 26. (In Chinese)

LIU Fafa. WANG Yunkai. LI Hua. et al. Performance of electro-hydraulic valve train and application [J]. Transaction of CSICE. 2011( 1) :54 - 60. (In Chinese)

CUI Jingchen. LONG Wuqiang.TlAN Jiangping. Et al. Investigation on controllability of dual-mode fully variable valve electro-hydraulic actuation system [J]. Chinese Internal Combustion Engine Engineering. 2011. 35(2); 36 41. (In Chinese)

WONG P K, MOK W. Design and modeling of a novel electro-mechanical fully variable valve system [R]. Washington DC:SAE International.2008-01- 1733.

BUTZMANN S, MELBERT J. Sensorless control of electromagnetic actuator for variable valve train [R]. Washington DC:SAE International. 2000-01- 1225.

PARLIKAR T A,CHANGE W S. QIU Y H. et al. Design and experimental implementation of an electromagnetic engine valve drive [C]// IEEE/ASME Transactions on Mechatronics.2005,10(5): 182-494.

MOHAMMAD P. AMIR F. AMIR K. A robust lift control technique in electro-hydraulic caniless valves using system average model [C]// IMECE2010. Vancouver. 2010.

ALLEN J. LAW D. Production electro-hydraulic variable valve train fora new generation of I. C engines [R]. Washington DC:SAE International , 2002- 01- 1109.

GAO Fengjun. Model and performance studies of electro-hydraulic valve actuators on gasoline HCCI engine [D]. Changchun: College of Automative Engineering. Jilin University. 2013. (In Chinese)


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