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Electromagnetic valve train for gasoline engine exhaust system

  • X. Y. Fan
  • L. Liu
  • S. Q. Chang
  • J. T. Xu
  • J. G. Dai
Article

Abstract

Electromagnetic valve train (EMVT) in camless engine offers large potential for both part load fuel economy and high load engine torque. However, it is more difficult to be applied on exhaust system than intake system. Because the gas pressure brings high demands for driving force, especially at high engine speed and full load. Based on the working characters of actuator, a method by increasing the transient currents in windings during valve’s opening motion is suggested to overcome the gas pressure. But this will cause more energy losses and heat. In order to make the EMVT used on exhaust system better, quantitative analysis is carried out against the additional power consumption caused by gas pressure under different conditions. Furthermore, an approach is introduced to define the optimal exhaust valve opening motion at full load conditions. It aims at making a better compromise between the engine power output and exhaust valves’ power consumption, thus both the efficiency of EMVT and engine performance are enhanced.

Key words

Camless engine Electromagnetic valve train Exhaust system Gas pressure Power consumption 

Nomenclature

EMVT

electromagnetic valve train

EVO

exhaust valve opening

EVC

exhaust valve closing

CA

crank angle

ATDC

after top dead center

BDC

bottom dead center

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References

  1. Dai, J. G. and Chang, S. Q. (2014). Loss analysis of electromagnetic linear actuator. Int. J. Appl. Electromagnet Mech. 46, 3, 471–482.Google Scholar
  2. D’Errico, G., Lucchini, T., Merola, S. and Tornatore, C. (2012). Application of a thermodynamic model with a complex chemistry to a cycle resolved knock prediction on a spark ignition optical engine. Int. J. Automotive Technology 13, 3, 389–399.CrossRefGoogle Scholar
  3. Descombes, G., Maroteaux, F. and Feidt, M. (2003). Study of the interaction between mechanical energy and heat exchanges applied to IC engines. Appl. Thermal Eng. 23, 16, 2061–2078.CrossRefGoogle Scholar
  4. di Gaeta, A., Giglio, V. and Police, G. (2009). Model-based decoupling control of a double magnet engine valve actuator. SAE Paper No. 2009-01-2751.Google Scholar
  5. Flierl, R., Lauer, F., Breuer, M. and Hannibal, W. (2012). Cylinder deactivation with mechanically fully variable valve train. SAE Paper No. 2012-01-0160.Google Scholar
  6. Frederic, A., Picron, V., Hobraiche, J., Gelez, N. and Gouiran, S. (2010). Electromagnetic valve actuation system e-valve: Convergence point between requirements of fuel economy and cost reduction. SAE Paper No. 2010-01-1197.Google Scholar
  7. Kramer, U. and Phlips, P. (2002). Phasing strategy for an engine with twin variable cam timing. SAE Paper No. 2002-01-1101.Google Scholar
  8. Lee, H. B., Kwon, H. and Min, K. (2007). Effects of various VVA systems on the engine fuel economy and optimization of a CVVT-VVL SIengine using 1D simulation. Int. J. Automotive Technology 8, 6, 675–685.Google Scholar
  9. Liu, L. and Chang, S. Q. (2011). Motion control of an electromagnetic valve actuator based on the inverse system method. Proc. IMechE, Part D: J. Automobile Engineering 226, 8, 85–93.Google Scholar
  10. Mohamed, E. D. (2011). Design and experimental investigation on an electromagnetic engine valve train. SAE Paper No. 2011-01-0365.Google Scholar
  11. Myung, C. L., Choi, K. H., Hwang, I. G., Lee, K. H. and Park, S. (2009). Effects of valve timing and intake flow motion control on combustion and time-resolved HC & NOX formation characteristics. Int. J. Automotive Technology 10, 2, 161–166.CrossRefGoogle Scholar
  12. Parvate-Patil, G. B., Hong, H. and Gordon, B. (2003). An assessment of intake and exhaust philosophies for variable valve timing. SAE Paper No. 2003-32-0078.Google Scholar
  13. Pourkhesalian, A. M., Shamekhi, A. H. and Salimi, F. (2010). NOx control using variable exhaust valve timing and duration. SAE Paper No. 2010-01-1204.Google Scholar
  14. Schernus, C., Van der Staay, F., Janssen, H. and Neumeister, H. (2002). Modeling of exhaust valve opening in a camless engine. SAE Paper No. 2002-01-0376.Google Scholar
  15. Stewart, P., Gladwin, D. and Fleming, P. J. (2007). Multiobjective analysis for the design and control of an electromagnetic valve actuator. Proc. IMechE, PartD: J. Automobile Engineering 221, 5, 567–577.CrossRefGoogle Scholar
  16. Zhao, J. and Seethaler, R. J. (2010). Compensating combustion forces for automotive electromagnetic valves. Mechatronics 20, 4, 433–441.CrossRefGoogle Scholar
  17. Zhu, J. H., Change, S. Q. and Dai, J. G. (2013). The research of a differential magnetoresistive linear displacement sensor measurement system. Sensors & Transducers 161, 12, 618–624.Google Scholar

Copyright information

© The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • X. Y. Fan
    • 1
  • L. Liu
    • 1
  • S. Q. Chang
    • 1
  • J. T. Xu
    • 1
    • 2
  • J. G. Dai
    • 1
  1. 1.School of Mechanical EngineeringNanjing University of Science and TechnologyNanjingChina
  2. 2.School of Mechanical EngineeringNanjing Institute of Industry TechnologyNanjingChina

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