JUDGMENT ON THE INFLUENCE OF THE CYLINDER ARM LENGTH AND STEERING WHEEL ANGLES ON THE MODIFIED TRACTOR HYDRAULICALLY

Document Type : Original Article

Authors

1 Prof. of Power Technology and Farm Machinery of Agric., Mansoura Univ., Egypt.

2 Ass. Res. in Agric. Eng. Res. Inst. (AEnRI), Giza, Egypt.

Abstract

The aim of this investigation was to choose and develop the local hydraulic steering system. The components of modified system were the pump, steering unit, steering shaft, cylinder, double-shear clevis ends for the cylinder and rod ends. To evaluate the hydraulic steering system, the field experiment factors were three tractor forward speeds (4.0; 5.5 and 7.0 km/h) and four distance between the front wheel (77.5; 94.0; 109.5 and 125.5 cm) that realized four “l/b” ratios were identified to measure the steering angles, cylinder length and steering wheel parameters and its affecting field efficiency, turning time and tractor fuel consumption. A response surface methodology (RSM) is used to collect of mathematical and statistical techniques for empirical model building for steering of hydraulic tractor. Increasing the cylinder length (Lef) directly increases each of actual and theoretical outer steering angles (θth˚) at different ratio of (l/b) and vice versa at increasing the (l/b) ratio. The same relation was found for response of steering wheel. Practically, in the case of stability the average of turning radius for the hydraulic steering system was permanent as 2.5m against 3.0m for mechanical steering. The hydraulic steering system reduces the tractor turning radius, total fuel consumption, the time losses in the turning, and increasing the field efficiency.

References

Cheng, Y. and N. Bradley (2007). Response Surface Methodology. M. Sc. Thesis, Indiana University of South Bend.
Dwight, R. E.; V. I. Adamchuk; M. F. Kocher and R. M. Hoy (2010). Using a vision sensor system for performance testing of satellite-based tractor auto-guidance. Computers and Electronics in Agriculture, 72 (2): 107-118.
El- Awady,  M. N.; A. M. M. Sarhan and   H. S. Al–Katary (2009). A study on agricultural tractors steering mechanism (1- the steering angles). Misr J. Ag. Eng., 26 (4): 1725 – 1742.
Habibi, H.; K.  H.  Shirazi and M. Shishesaz (2008). Roll steer minimization of McPherson-strut suspension system using genetic algorithm method. Mech. Mach. Theory, Vol. 43, pp. 57-67.
Hanzaki, A.  R.; P. V. M.  Rao and S. K.  Saha (2009). Kinematic and sensitivity analysis and optimization of planar rack-and-pinion steering linkages. Mech. Mach. Theory, Vol. 44, pp. 42-56.
Hoyle, J. B. (2007). Bump steer effects in a 10 ton truck with a leaf-spring suspension, Proc. Inst. Mech. Eng., Part D: J. Automot. Eng., Vol. 221, pp. 1051-1069.
Ismail, Z. E.; M. Ibrahim.; A. F. Bahnas and I. El-Sebaee (2012). Steering evaluation of tractor using the response surface methodology. Misr J. Ag. Eng., 19 (4): 493 – 510.
Michihisa, I.; N. Hiroshi; T. Hiroki; O. Toho and N. Taku (2011). Small-radius turning performance of an articulated vehicle by direct yaw moment control. Computers and Electronics in Agriculture, Vol. 76, pp. 277-283.
Montgomery, D. C. (2005). Design and analysis of experiments: Response surface method and designs. New Jersey: John Wiley and Sons, Inc.
Sahu, R.K. and H. Raheman (2008). A decision support system on matching and field performance prediction of tractor-implement system. Computers and Electronics in Agriculture. 60 (1): 76-86.
Watanabe, K.; J. Yamakawa; M. Tanaka and T. Sasaki (2007). Turning characteristics of multi-axle vehicles. J. Terramecha., Vol. 44, pp. 81-87.
Zhao, X. P.; L. Xin; C. Jie and M. J. Lai (2009). Parametric design and application of steering characteristic curve in control for electric power steering. Mechatronics.19 (6): 905-911.
Misr Journal of Agricultural Engineering
Volume 31, Issue 2
April 2014
Pages 455-466

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