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Optimization Study of Higher Steering Effort in RH Turn for Commercial Truck
Technical Paper
2015-01-2734
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Low steering effort is the basic requisite to proffer driver with drive comfort and easy maneuverability on turns. Various components in steering and suspension system play a vital role in determining the steering effort of vehicle. The discussion has been emphasized on static steering effort i.e. when vehicle is stationary and wheels are turned from lock to lock position.
There are various factors which affect the steering effort of a vehicle. Following are the high priority factors:
- 1Steering Geometry.
- 2Tyre static friction torque.
- 3Friction among the steering linkages.
In this paper, the crucial factors which lead to difference in steering effort of RH and LH turn have been discussed in detail.
The Ackerman linkages have been optimized to show that the effective lengths of track arms along with pitman arm and steering arm for a specific turn angle is not the sole reason for difference in steering effort but the acceleration of linkages also play a vital role in this phenomenon. Acceleration analysis is used as a new technique to analyze the variation in steering effort among RH and LH turn. Difference between the acceleration of linkages during left and right turn along with the decrease in acceleration with increase in wheel cut angle is used as a key feature to optimize steering effort. Beside this, prime attention has been made to have optimized Ackerman error by optimizing the geometry.
Two case studies have been used to explain the above phenomenon of high steering effort in RH turn as compared to LH turn at the end of this paper.
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Authors
Topic
Citation
Deshpande, A., Gambhir, H., Raj, K., and Kumar, S., "Optimization Study of Higher Steering Effort in RH Turn for Commercial Truck," SAE Technical Paper 2015-01-2734, 2015, https://doi.org/10.4271/2015-01-2734.Also In
References
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- Upadhyay , V. , Pathak , A. , Kshirsagar , A. , Khan , I. et al. Development of Methodology for Steering Effort Improvement for Mechanical Steering in Commercial Vehicles SAE Technical Paper 2010-01-1887 2010 10.4271/2010-01-1887
- Monroe , T. Discussion of Steering Problems on Modern Heavy Trucks SAE Technical Paper 610289 1961 10.4271/610289
- Kim , D. , Tak , T. , Kuk , M. , Park , J. et al. Evaluation and Experimental Validation of Steering Efforts Considering Tire Static Friction Torque and Suspension and Steering Systems Characteristics SAE Technical Paper 2007-01-3641 2007 10.4271/2007-01-3641
- Gillespie , T. Fundamentals of Vehicle Dynamics Warrendale Society of Automotive Engineers, Inc. 1992 10.4271/R-114