Study on Control of the Rotational Speed of Diesel Engine under State-Switch Mode in Parallel Hybrid Hydraulic Excavator

Abstract:

In parallel hybrid hydraulic excavator (PHHE) with super capacitor, the throttle position of the diesel engine is changed with the variation of the capacitor’s state of charge (SOC) of the super capacitor. When the throttle position is switched, the rotational speed of the diesel engine cannot be able to increase or decrease to the target speed rapidly enough, and it may fluctuate in large range under given conditions. Under the assumption that the loading torque of the diesel engine is invariant at the switch instant, the response of the rotational speed appears to be in different forms, which are not admitted for the normal work of PHHE. In this paper, switch types are divided into eight state-switch modes, in terms of the loading type and the amplitude of variation of the throttle position. And the paper mainly aims to the smooth transition of the rotational speed during the switched process of PHHE by the dynamic compensation of the electric motor. Experimental results show that the dynamic compensation of the electric motor can improve the dynamic behavior when PHHE is under state-switch modes.

• Periodical: Applied Mechanics and Materials (Volume 290)
• Pages: 97-106
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.290.97
• Online since: February 2013
• Authors: Ban Zan Hu, Qing Feng Wang, Hong Mei Wang, Hong Yao
• Keywords: Generating Condition, Motoring Condition, PHHE, Rotational Speed, Smooth Transition, State-Switch Mode

References

[1] Q.F. Wang, Y.T. Zhang and Q. Xiao: Chinese Journal of Mechanical Engineering, Vol. 41 (2005) No. 12, p.135 (in Chinese).

[2] T.L. Lin, Q.F. Wang, B.Z. Hu and W. Gong: Automation in Construction, Vol. 19(2005) No. 1, p.11.

[3] Q. Xiao, Q.F. Wang and Y.T. Zhang. Automation in Construction Vol. 17(2005) No. 4, p.361.

[4] D.Y. Wang, C. Guan, S.X. Pan, M.J. Zhang and X. Lin : Automation in Construction Vol. 18(2005) No. 3, p.249.

[5] M. Matsubara and N. Matoba: J.P. Patent 2004011256(2004).

[6] M. Naruse and N. Oji: J.P. Patent2004011502(2004).

[7] S. Riyuu, M. Tamura, M. Ochiai, et al: J.P. Paten2003328397(2003).

[8] M. Naruse, M. Tamaru and K. Kimoto U.S. Patent6708787(2004).

[9] T. Nanjo, E. Imanishi and M. Kagoshima. JSAE (Society of Automotive Engineers of Japan) Annual Congress, JSAE 86(2003)13-18.

[10] Y. Kanezawa, Y. Daisho, T. Kawaguchi, et al. JSAE (Society of Automotive Engineers of Japan) Annual Congress, JSAE 100(2001)17-20.

[11] M. Kagoshima, T. Sora and M. Komiyama. JSAE (Society of Automotive Engineers of Japan) Annual Congress, JSAE 86(2003)1-6.

[12] Y. Tong, M.G. Ouyang and J.Z. Zhang. Chinese Journal of Mechanical Engineering. Vol. 39(2003) No. 10, p.156 (in Chinese).

[13] Y.B. Yan, F.W. Yan and C.Q. Du. China Mechanical Engineering. Vol. 21(2010) No. 2, p.234(in Chinese).