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| 1 | A parametric study on the contact stress of half toroidal continuously variable transmission显示文摘The most general contact in mechanical transmission is the elliptical one. In particular, a toroidal continuously variable transmission (CVT) has an elliptical shape in the contact area under the elastohydrodynamic lubrication regime, where the shearing of the fluid subjects to high contact stress and transmits the power. Many parameters affect the contact service performance of the half toroidal CVT, which include the properties of the contacting material (Young抯 modulus), operating parameters (input torque and maximum traction coefficient) and geometrical parameters (aspect cavity ratio, curvature ratio and half cone angle of the power roller). In this paper, the contacts between the input disk, the power roller and the output disk are formulated using the classical Hertzian contact theory. Based on the formulated equations, different system parameters, which affect the maximum Hertzian stresses, are compared. The comparative results will provide some observations of the relations between the maximum Hertzian stresses and transmission ratios in the form of graphs. These graphs give useful information for designer to know the maximum Hertzian stress during operation in such systems. | NabilAbdullaAttia QINDatong SHIWankai LIHuaying | 2003 | Journal of Chongqing University2003，2，2： | 3 |
| 2 | EXPERIMENT STUDY ON SPEED RATIO CONTROL OF METAL V-BELT TYPE CVT显示文摘Based on the control scheme of force and position, the controlling and testing system of metal V-belt type CVT is developed.Having taken account of the complex nonlinear characteristics of the CVT shift dynamics and the saturation and nonlinear characteristics of the speed ratio control valve, the speed ratio fuzzy controller based on the speed ratio feedback is designed.The experiment results show that the developed speed ratio control system is practical and feasible. | WangHongyan QinDatong ZhangBoying QiuXiding | 2004 | Chinese Journal of Mechanical Engineering2004，17，1： | 2 |
| 3 | Multiple-objectiveReal-timeOptimumControlStrategyforFuelConsumptionandEmissionofFullHybridElectricVehicle显示文摘 | QinDatong WeiHanbing DuanZhihui etal | 2012 | JournalofMechanicalEngineering2012，48，6： | 1 |
| 4 | An overview on research developments of toroidal continuously variable transmissions显示文摘As environmental protection agencies enact new regulations for automotive fuel economy and emission, the toroidal continuously variable transmissions (CVTs) keep on contribute to the advent of system technologies for better fuel consumption of automobiles with internal combustion engines (ICE). Toroidal CVTs use infinitely adjustable drive ratios instead of stepped gears to achieve optimal performance. Toroidal CVTs are one of the earliest patents to the automotive world but their torque capacities and reliability have limitations in the past. New developments and implementations in the control strategies, and several key technologies have led to development of more robust toroidal CVTs, which enables more extensive automotive application of toroidal CTVs. This paper concerns with the current development, upcoming and progress set in the context of the past development and the traditional problems associated with toroidal CVTs. | NabilAbdullaAttia QINDatong LIHuaying | 2003 | Journal of Chongqing University2003，2，1： | 0 |
| 5 | LOAD SHARING AND CONTACT OF HOURGLASS WORM GEARING显示文摘Based on solid modeling, the geometry and the FE model of the hourglass worm gearing are established. By the hybrid method of FEM and penalty function, the load sharing among tooth paris and the stress of contact teeth are calculated, the contact zones and the distribution of the contact pressure are investigated. The variation of the contact states with the load is investigated by comparision of its contact patterns under different loads. | QinDatong QinDongxing State Key Lab of Mechanical Transmission, Chongqing University | 1999 | Chinese Journal of Mechanical Engineering1999，12，4： | 0 |
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