Engine Economic Performance Simulation by Single Valve Working Mode with Variable Lift

Abstract

Abstract: A working mode of single intake valve with variable lift was put forward based on the fully flexible EMVT technology. Based on EMVT power consumption, the engine was modeled and simulated. The results show that, in the low speed engine conditions by single valve with variable lift mode, the air charging rates may be enhanced, the pumping loss and EMVT driving power may be reduced, so the aims of improving the fuel economy of the engine are achieved. And with the decreasing engine speeds and loadings, the improvement rates assume the increasing trend, such as in engine speed 1000r/min, load 40.0% condition and single valve with 2mm lift, the fuel consumption may be decreased 12.2% compared to the prototype.

Key words: electromagnetic valve train(EMVT), pumping loss, working mode, fuel economy

摘要： 基于全柔性化的电磁驱动配气技术，提出了单气门变升程工作模式；在考虑驱动机构驱动功耗的基础上对发动机进行了建模和仿真分析。研究结果表明：在发动机中低转速工况下，采用单气门变升程工作模式能够适度增大充气流速，减小泵气损失和配气机构驱动功耗，进而达到改善发动机燃油经济性的目的；且随着发动机转速和负荷的降低，改善幅度呈上升趋势，如发动机转速1000r/min、负荷率40%工况下单气门2.00mm升程运行模式有效燃油消耗率相比原型机减小了12.2%。

关键词: 电磁驱动配气机构, 泵气损失, 工作模式, 燃油经济性

CLC Number:

TK441

XU Jiangtao, CHANG Siqin, LIU Liang, FAN Xinyu. Engine Economic Performance Simulation by Single Valve Working Mode with Variable Lift[J]. China Mechanical Engineering.

许江涛, 常思勤, 刘梁, 范新宇. 采用单气门变升程工作模式的发动机经济性能仿真[J]. 中国机械工程.

References

[1]KUTLAR O A, ARSLAN H, CALIK A T. Methods to Improve Efficiency of Four Strokes Spark Ignition Engines at Part Load [J]. Energy Conversion and Management, 2005，46:3202-3220.

[2]MUZAKKIR S M, HIRANI H. A Magneto Rheological Fluid Based Design of Variable Valve Timing System for Internal Combustion Engine Using Axiomatic Design [J]. International Journal of Current Engineering and Technology, 2015,5:603-612.

[3]王天友，张运泉，王利民,等. 无节气门负荷控制策略对汽油机性能影响的研究[J]. 内燃机学报，2009，27（3）：224-230.
WANG Tianyou, ZHANG Yunquan, WANG Limin, et al. Effect of Throttle-free load Control strategies on a SI Engine Performance[J]. Trans. of Chinese Society for Internal Combustion Engine, 2009, 27(3): 224-230.

[4]BOZZA F, BELLIS V D, GIMELLIETAL A. Strategies for Improving Fuel Consumption at Part Load in a Downsized Turbocharged SI Engine: a Comparative Study [J].SAE Technical Paper,2014:2014-01-1064.

[5]TONG Sunyu, LI Xianjing, LIU Shuai, et al. Effect of Two-stage Valve Lift for Fuel Economy and Performance on a PFI Gasoline Engine[J].SAE Technical Paper, 2014:2014-01-2874.

[6]李子非，常思勤，刘梁．装用电磁驱动气门的发动机配气相位优化[J]．汽车工程，2011，33(1):19-22．
LI Zifei, CHANG Siqin, LIU Liang, et al. Valve Timing Optimization for Engine with Electro-magnetic Valve[J]. Automotive Engineering, 2011, 33(1):19-22.

[7]SOLMAZ H. Combustion, Performance and Emission Characteristics of Fuel Oil in a Spark Ignition Engine [J]. Fuel Processing Technology, 2015,133:20-28.

[8]BOZZA F, GIMELLI A. A Quasi-dimensional Three-zone Model for Performance and Combustion Noise Evaluation of a Twin-spark High-EGR Engine[J]. SAE Technical Paper, 2004:2004-01-0619.

[9]HEYWOOD J B. Internal Combustion Engines Fundamentals[M]. New York：McGraw-Hill Book Company,1988.

[10]PIPITONE E. A New Simple Friction Model for S. I. Engine[J].SAE Technical Paper,2009:2009-01-1984.

[11]DAI Jianguo, CHANG Siqin. Loss Analysis of Electromagnetic Linear Actuator[J]. International Journal of Applied Electromagnetic and Mechanics, 2014, 46(3): 471-482.

[12]常思勤, 刘梁, 李子非. 一种应用电磁驱动气门的发动机高效启动方法.201010557390.4[P]. 2012-05-30.
CHANG Siqin, LIU Liang, LI Zifei. A Method for Engine Starting up Efficiently by Electromagnetic Valve.201010557390.4[P].2012-05-30.

[13]LIU Liang,CHANG Siqin. Motion Control of the Electromagnetic Valve Actuator Based on Inverse System Method [J]. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2012,226:85-93.

[14]BELLISA V D, SEVERIBET E, FONTANESI S, et al. Hierarchical 1D/3D Approach for the Development of a Turbulent Combustion Model Applied to a VVA Turbocharged Engine, Part Ⅱ: Combustion Model[J]. Energy Procedia, 2014,45:1027-1036.

[15]BELLISA V D, SEVERIBET E, FONTANESI S, et al. Hierarchical 1D/3D Approach for the Develop-ment of a Turbulent Combustion Model Applied to a VVA Turbocharged Engine, Part Ⅰ: Turbulence Model [J]. Energy Procedia, 2014,45:829-838.

[16]ZHAO J. A Fully Flexible Valve Actuation System for Internal Combustion Engines[D].Okanagan:University of British Columbia,2009.

[17]雷英杰，张善文，李续武,等. MATLAB遗传算法工具箱及其应用[M]. 西安：西安电子科技大学出版社，2005：95-101.
LEI Yingjie, ZHANG Shanwen, LI Xuwu,et al. MATLAB Genetic Algorithm Toolbox and Its Application[M]. Xi'an: Xi'an University of Electronic Science and Technology Press,2005：95-101.