Main Article Content

Behrouz Sadeghian Shahram Yousefi Touraj Sadeghian


Extensive activities have been carried out, including variable valve timing systems, smoke recovery systems and direct fuel injection engines to reduce engine emissions and increase engine efficiency. In four-stroke engines, the valves are moved using a cam, and the shape of the cam determines the timing of each valve. But using variable valve timing in the engine is an effective and big step to improve the resulting performance. The variable electromagnetic valve scheduling system allows the exhaust and fuel valves to operate in a completely variable manner and to react to the smallest changes in the cylinder heads. Today, it is used to control the valve timing by using a hydraulic motor and a cam. But the design and construction of the system studied in this research have more modern technology. In this study, magnetic magnets were used to remove the camshaft, camshaft, crankshaft, crankshaft and many mechanical parts instead of using a hydraulic motor to control variable timing and valve movement. Magnets in which existing coils acquire magnetic properties by applying current to them. For each valve, two magnets are used, one to open and the other to close the valve with a spring. Many dynamic and magnetic parameters have been used in the design of this system, and many geometric constraints are involved in its design. The electromagnetic force generated is proportional to the volume of the magnetic magnet, and this designed volume is limited by the space of the cylinder head block. The speed distribution of valves and armatures is Gaussian. The minimum valve speed in an electromagnetic motor depends on the natural frequency of the mass and spring system. It is constant regardless of the motor speed.

Article Details


Magnet design, Valve, Machine, Geometric and dynamic parameters

[1] M. Morovatiyan, M. Shahsavan, J. Aguilar, J.H. Mack. Effect of Argon Concentration on Laminar Burning Velocity and Flame Speed of Hydrogen Mixtures in a Constant Volume Combustion Chamber. Journal of Energy Resources Technology. 143 (2020).
[2] S.A.N. Tiji, T. Park, A. Asgharzadeh, H. Kim, M. Athale, J.H. Kim, et al. Characterization of yield stress surface and strain-rate potential for tubular materials using multiaxial tube expansion test method. International Journal of Plasticity. 133 (2020) 102838.
[3] S. Abbasnia, Z. Nasri, M. Najafi. Comparison of the mass transfer and efficiency of Nye tray and sieve tray by computational fluid dynamics. Separation and Purification Technology. 215 (2019) 276-86.
[4] H. Mohammadnejad, S. Liao, B.A. Marion, K.D. Pennell, L.M. Abriola. Development and Validation of a Two-Stage Kinetic Sorption Model for Polymer and Surfactant Transport in Porous Media. Environmental Science & Technology. 54 (2020) 4912-21.
[5] P. Pianko-Oprych, S.M. Hosseini, Z. Jaworski. Model development of integrated CPOx reformer and SOFC stack system. Polish Journal of Chemical Technology. 18 (2016) 41-6.
[6] A. Yazdani, A. Shamekhi, S. Hosseini. Modeling, performance simulation and controller design for a hybrid fuel cell electric vehicle. Journal of the Brazilian Society of Mechanical Sciences and Engineering. 37 (2015) 375-96.
[7] Y. Sato, T. Narita, H. Kato, H. Uchida, Y. Matsumura. Valve Mechanism for Gasoline Engine with Linear Motor (Fundamental Consideration Using Electromagnetic Field Analysis). Proceedings of the School of engineering of Tokai University, Series E. (2019) 35-9.
[8] D. Vu, H. Pyung. A novel of hybrid magnet engine valve actuator using shorted turn for fast initial response. International Journal of Information and Electronics Engineering. 3 (2013) 95.
[9] B. Wu, Z. Filipi, R. Prucka, D. Kramer, G. Ohl. A simulation-based approach for developing optimal calibrations for engines with variable valve actuation. Oil & Gas Science and Technology-Revue de l'IFP. 62 (2007) 539-53.
[10] Y. Moriya, A. Watanabe, H. Uda, H. Kawamura, M. Yoshioka, M. Adachi. A Newly Developed Intelligent Variable Valve Timing System-Continuously Controlled Cam Phasing as Applied to a New 3 Liter Inline 6 Engine. SAE Technical Paper1996.
[11] H. Hong, G. Parvate-Patil, B. Gordon. Review and analysis of variable valve timing strategies—eight ways to approach. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 218 (2004) 1179-200.
[12] P.H. Dugdale, R.J. Rademacher, B.R. Price, J.W. Subhedar, R.L. Duguay. Ecotec 2.4 L VVT: A variant of GM's global 4-cylinder engine. SAE Technical Paper2005.
[13] R. Simpson, F.R. Smith. Worm gear driven variable cam phaser. Google Patents2003.
[14] S. Park, J. Lee, J. Yoo, D. Kim, K. Park. Effects of design and operating parameters on the static and dynamic performance of an electromagnetic valve actuator. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 217 (2003) 193-201.
[15] R. Aslani, M. Rasti, A. Khalili. Energy efficiency maximization via joint sub-carrier assignment and power control for OFDMA full duplex networks. IEEE Transactions on Vehicular Technology. 68 (2019) 11859-72.
[16] M.M. Schechter, M.B. Levin. Camless engine. SAE Technical Paper1996.
[17] S.-W. Baek, S.W. Lee. Design Optimization and Experimental Verification of Permanent Magnet Synchronous Motor Used in Electric Compressors in Electric Vehicles. Applied Sciences. 10 (2020) 3235.
[18] A.T. Inc. Adept robotics for packaging. in: P. Brochure, (Ed.)., 2008.
[19] D.T. Vu, Y. Choi, J. Kim. Lumped parameter modeling and analysis of hybrid magnet engine valve actuator. International Journal of Precision Engineering and Manufacturing. 11 (2010) 983-6.
[20] G. Fontana, E. Galloni. Variable valve timing for fuel economy improvement in a small spark-ignition engine. Applied Energy. 86 (2009) 96-105.
[21] S.B. da Cunha, J.K. Hedrick, A.P. Pisano. Variable valve timing by means of a hydraulic actuation. SAE Technical Paper2000.
[22] M. H. Biroun, M. Rahmati, R. Tao, H. Torun, M. Jangi, Y. Fu. Dynamic behavior of droplet impact on inclined surfaces with acoustic waves. Langmuir. 36 (2020) 10175-86.
[23] Z. Yuan, J. Fu, Q. Liu, Y. Ma, Z. Zhan. Quantitative study on influence factors of power performance of variable valve timing (VVT) engines and correction of its governing equation. Energy. 157 (2018) 314-26.
Mechanical Engineering
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

The copyright in the text of individual articles (including research articles, opinion articles, book reviews, conference proceedings and abstracts) is the property of their respective authors, subject to a general license granted to Mapta Publishing Group and a Creative Commons CC-BY licence granted to all others, as specified below. The compilation of all content on this site, as well as the design and look and feel of this website are the exclusive property of Mapta Publishing Group.

All contributions to Mapta Publishig Group may be copied and re-posted or re-published in accordance with the Creative Commons licence referred to below.

Articles and other user-contributed materials may be downloaded and reproduced subject to any copyright or other notices.

As an author or contributor you grant permission to others to reproduce your articles, including any graphics and third-party materials supplied by you, in accordance with the Mapta Publishing GroupTerms and Conditions and subject to any copyright notices which you include in connection with such materials. The licence granted to third parties is a Creative Common Attribution ("CC BY") licence. The current version is CC-BY, version 4.0 (, and the licence will automatically be updated as and when updated by the Creative Commons organisation.

How to Cite

Sadeghian, B., Yousefi, S. ., & Sadeghian, T. (2020). An Analytical Investigation of Magnetic Variable Valve Timing System in Internal Combustion Engines. Mapta Journal of Mechanical and Industrial Engineering (MJMIE), 4(1), 26-34.