• Transactions of the Korean Society of Mechanical Engineers A
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• v.41 no.7
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• pp.585-590
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• 2017

Vehicle behavior is determined by forces and a torques generated at the ground contact surface of the tire. Various tire models are used to calculate the forces and torques acting on the tire. The brush model calculates the forces and torques with fewer coefficients than other tire models. However, owing to fewer degrees of freedom in calculating the forces, this model has limitations in precisely expressing measured data. In this study, this problem was addressed by adding the least parameters to the friction coefficient and tire properties of the brush model, and the proposed model was validated.

• The tire
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• s.217
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• pp.27-29
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• 2003

• The tire
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• s.146
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• pp.8-16
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• 1990

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.4
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• pp.1523-1531
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• 2011

Multi-axle driving vehicle are favored for military use in off road operations because of their high mobility on extreme terrains and obstacles. Especially, Military Vehicle needs an ability to driving on hills of 60% angle slope. This paper presents the improvement of the ability of hill climbing for 6WD/6WS vehicle through the optimal tire force distribution method. From the driver's commands, the desired longitudinal force, the desired lateral force, and the desired yaw moment were obtained for the hill climbing of vehicle using optimal tire force distribution method. These three values were distributed to each wheel as the torque based on optimal tire force distribution method using friction circle and cost function. To verify the performance of the proposed algorithm, the simulation is executed using TruckSim software. Two vehicles, the one the proposed algorithm is implemented and the another the tire's forces are equivalently distributed, are compared. At the hill slop, the ability to driving on hills is improved by using the optimum tire force distribution method.

• The tire
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• s.73
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• pp.15-19
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• 1977

원고문제등은 과거의 타이어수출 업무에서는 전연 무연한 일이었다. 연이나 이것이 1원의 차손으로 일본의 타이어계에 끼치는 영향은 월간 5천만원, 반기에서 수10억원 이라고 해서는 그냥 앉아서 간과할 수는 없다. 아니 그뿐 아니라 매일의 환시세 조차 타이어수출 채산성의 열쇠를 장악하는 중대문제로까지 발전하고 있다. 하나, 여하한 타이어계의 힘을 갖고서도 환시세만은 어떻게 할 방법이 없다. 그래서 자위책으로써 고려되는 수단은「코스트 다운과 타이어 수출 가격의 인상」이라고 단언하는 이는 BS타이어의 석부상무이다. 그리고 또한 「코스트 다운은 어디까지나 기업전체의 문제, 당면한 수출 업무로써 이룩할 수 있는 것은 가능한 가격인상뿐」이라고 첨언, 또한 「지금이야 말로 세계의 일류품에의 자랑을...」이라고 설명한다.

• Journal of Korean Society of Transportation
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• v.32 no.5
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• pp.503-512
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• 2014

In this paper, various tire blow-out force experiment data were collected and analyzed to obtain approximate values of related coefficients such as rolling resistance, self-aligning torque, cornering stiffness, and radial stiffness for the analysis of the motion of vehicles with tire blow-outs. These coefficients related to tire blow-outs were input into a vehicle accident analysis program to simulate and examine the effects of tire blow-outs. Various configurations and velocities of vehicle collisions without tire blow-outs were also used as reference to establish collision events of vehicle collisions with tire blow-outs. For the events, the simulation analysis was performed and collision characteristics were obtained. Consideration of tire blow-outs or damages suggested in this study will greatly contribute to more reliable vehicle accident reconstructions.

• The tire
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• s.91
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• pp.20-27
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• 1980

세계 주요자동차 메이커들의 생산현황과 주요국별 자동차산업 및 무역동향을 보면 놀라울 정도로 자동차시장이 격변하고 있다. 일본의 거대한 자동차산업의 반정도가 외국시장으로 수출되어 상대국시장을 점유하는가하면 자동차 선진국에서는 자구책에 안간 힘을 쓰는 한편, 일본차 봉쇄에 전력을 기울이고 있어 자동차무역전쟁을 방불케 하고 있다. 80년대에 와서 일본의 자동차생산이 드디어 미국을 능가하는 동시에 유럽에서도 서독의 기반이 흔들리게 되었다고 한다. 따라서 미국과 EC는 일본차 봉쇄에 공동전선을 펴는 등, 80년대는 자동차산업의 일대격전이 예상되고 있다.

• The Journal of the Acoustical Society of Korea
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• v.14 no.2
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• pp.80-91
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• 1995

A theoretical models has been prepared which describes the noise generated by tire/road interaction for the tire structure-borne sound analysis. The model begin with a set of thin shell equations describing the motion of the belt of a radial ply tire, as drived by Bohm('mechanisms of the belted tire', Igeniur-Archiv, XXXV, 1966). Structural quantities required for these equations are derived from material properties of the tire. The rolling shape of a tire is computed from the steady-state limit of these equations. Vibrational response of the tire is treated by the full dependent shell equations. The force input at the tire/road interface is calculated on the basis of tread geometry and distribution of contact patch pressure. Radiation of noise is calculated by a simpson integral. Using the programs, the effect on noise of various tire design variations is computed and discussed. Trends which lead to quiet tire design are identified.

• Journal of Power System Engineering
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• v.2 no.3
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• pp.55-59
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• 1998

This paper probes into the influence of tire uniformity on tire's modal parameters with the method of experimental modal analysis. Two radial tires of the same kind with different uniformity level are taken to be tested at different exciting points and real modal parameters are abstracted. The differences of their modal parameters are presented. Then tire transfer functions are constructed with experimental modal parameters and ideal modal parameters respectively. It is found that the measured transfer functions of tire of good uniformity are closer to ideal transfer function than that of tire of bad uniformity. The study shows evident interrelation of experimental modal parameters and tire uniformity, and further study should be of great value.

• Transactions of the Korean Society of Automotive Engineers
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• v.11 no.3
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• pp.214-219
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• 2003

This paper includes real-time tractive force estimation method using standard vehicle sensors such as wheel speed, brake pressure, throttle position, engine speed, and transmission carrier speed sensor. Engine map, torque converter lookup table, shaft torque observer, and brake gain adaptation method are used to estimate the tractive force. To verify this estimator, measurement which uses strain-based brake torque sensor and estimation results are presented. All results was performed using a real vehicle in a real-time.