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http://dx.doi.org/10.7467/KSAE.2016.24.5.512

A Study of Tire Road Friction Estimation for Controlling Rear Wheel Driving Force of 4WD Vehicle  

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)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.24, no.5, 2016 , pp. 512-519 More about this Journal
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.
Keywords
Tire road friction coefficient estimation; Wheel shaft torque estimation; Tire longitudinal force estimation; Tire vertical force estimation; Four-wheel drive;
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Times Cited By KSCI : 1  (Citation Analysis)
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