双圆锥式无级变速器传动性能的试验研究

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Experimental Investigation Into the Performance of Double ConicalContinuously Variable TransmissionLI Xueyuan SHEN Chujing YUAN Shihua CUI Jin(National Key Laboratory of Vehicular Transmission。

Beijing Institute of Technology，Beijing 1 0008 1)Abstract：The Performance of double conical continuously variable transmission(CVT)and its efect factors are investigated byexperimental method.An experimental device of the CVT is designed and manufactured，a performance test bench of the CVT isestablished，and the perform ance experiment of the CVT is carried out.The experiment results show that when the transmission ratio，input speed and the pressure of the hydraulic cavity remain constant，the eficiency of CVT increases with the increasing of the inputtorque，finally reach the maximum，and decrease later；when the transmission ratio，input torque and the input speed remain constan t，the eficiency of CVT increases with the decreasing of the pressure of the hydraulic cavity，but the CVT cannot transmit the powerefectively with too low pressure of the hydraulic cavity ；When the transmission ratio，input torque and the pressure of the hydrauliccavity remain constant，the eficiency of CVT decreases with the increasing of the input speed；Wh en the input speed，input torqueand the pressure of the hydraulic cavity remain constant，the eficiency of CVT increases with the increasing of the transmissionratio。

Key words：Continuously variable transmission Test bench Eficiency Spin0 前言目前 ，无 级变 速器(Continuously variabletransmission，CVT)已经越来越 泛的应用在汽车上[ 。无级变速器作为-种理想的变速器，可根据外部载荷使发动机工作在最佳燃油经济性区域，从而大幅度提高了汽车的燃油经济性，降低了油耗·国家部委基雌研(A2220060029)和车辆传动国家重点实验