Improvement in CAM Shaft Design: An Experimental Application and Recommendation


Article Preview

A new design of CAM shaft has been investigated for Campro engine 3.0L V4 engine. The new design adds a modification to Cam profile peak point in the Camshaft to be controllable at different speeds through a hydraulic system. The new design was simulated in CFD for tolerating stresses. The new design promotes Cams to give the exact heights at different engine speed depending on the optimize value valve opening time. At the same time this paper discusses the prediction of power performance of internal combustion engines with the new design. The expected result will significantly improve the engine speed-torque curve, reduce emission gases, and reduce fuel consumption. The new design model predictions need to be tested experimentally for further improvement in the hydraulic system before the commercial use.



Edited by:

Liyanage C De Silva, Sujan Debnath and Mohan Reddy. M.




M.S. Al-Khaldi et al., "Improvement in CAM Shaft Design: An Experimental Application and Recommendation", Applied Mechanics and Materials, Vols. 789-790, pp. 251-256, 2015

Online since:

September 2015




* - Corresponding Author

[1] Fontana, G. and E. Galloni, Variable valve timing for fuel economy improvement in a small spark-ignition engine. Applied Energy, 2009. 86(1): pp.96-105.


[2] Pulkrabek, W.W., Engineering fundamentals of the internal combustion engine. Vol. 478. 1997: Prentice Hall Upper Saddle River, NJ.

[3] Stone, R., Introduction to internal combustion engines. Gas, 1999. 2012: pp.05-10.

[4] Tuttle, J.H., Controlling engine load by means of late intake-valve closing. 1980, SAE Technical Paper.


[5] Stein, R., K. Galietti, and T. Leone, Dual equal vct-a variable Camshaft timing strategy for improved fuel economy and emissions. 1995, SAE Technical Paper.


[6] Stefanopoulou, A.G., J.S. Freudenberg, and J.W. Grizzle, Variable Camshaft timing engine control. Control Systems Technology, IEEE Transactions on, 2000. 8(1): pp.23-34.


[7] Kim, J. and D.K. Lieu, A new electromagnetic engine valve actuator with less energy consumption for variable valve timing. Journal of mechanical science and technology, 2007. 21(4): pp.602-606.


[8] Dresner, T. and P. Barkan, A review of variable valve timing benefits and modes of operation. 1989, SAE Technical Paper.


[9] Chang, J. -H., J. Kim, and B. Song, Hybrid electro-mechanical latching device for variable valve timing. International Journal of Precision Engineering and Manufacturing, 2012. 13(5): pp.803-806.


[10] Moriya, Y., et al., A Newly Developed Intelligent Variable Valve Timing System-Continuously Controlled Cam Phasing as Applied to a New 3 Liter Inline 6 Engine. 1996, SAE Technical Paper.


[11] Tai, C. and T. -C. Tsao. Control of an electromechanical actuator for Camless engines. in Proceedings of the American control conference. (2004).

[12] ÇINAR, C. and F. AKGÜN, Effect of Intake Valve Closing Time on Engine Performance and Exhaust Emissions in a Spark Ignition Engine. Gazi Üniversitesi Politeknik Dergisi, 2007. 10(4).