Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study of Tire Road Friction Estimation for Controlling Rear Wheel Driving Force of 4WD Vehicle

4WD 차량의 후륜 구동력 제어를 위한 구동시 노면마찰계수 추정에 관한 연구

  • Park, Jae-Young (Graduate school of Automotive Engineering, Kookmin University) ;
  • Shim, Woojin (Graduate school of Automotive Engineering, Kookmin University) ;
  • Heo, Seung-Jin (School of Automotive Engineering, Kookmin Universiy)
  • 박재영 (국민대학교 자동차공학전문대학원) ;
  • 심우진 (국민대학교 자동차공학전문대학원) ;
  • 허승진 (국민대학교 자동차공학과)
  • Received : 2016.02.11
  • Accepted : 2016.06.29
  • Published : 2016.09.01
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Abstract

In this study, the tire road friction estimation(TRFE) algorithm for controlling the rear wheel driving force of a 4WD vehicle during acceleration is developed using a standard sensor in an ordinary 4WD passenger car and a speed sensor. The algorithm is constructed for the wheel shaft torque, longitudinal tire force, vertical tire force and maximum tire road friction estimation. The estimation results of shaft torque and tire force were validated using a torque sensor and wheel force transducer. In the algorithm, the current road friction is defined as the proportion calculated between longitudinal and vertical tire force. Slip slop methods using current road friction and slip ratio are applied to estimate the road friction coefficient. Based on this study's results, the traction performance, fuel consumption and drive shaft strength performance of a 4WD vehicle are improved by applying the tire road friction estimation algorithm.

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References

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