In this paper, a kind of continuously variable transmission ( CVT) for hybrid hydraulic vehicle ( HHV) is proposed, which splits the output power of engine into hydraulic power and mechanical power two parts, and by adjusting the ratio between two parts of power, the continuous speed variation and the effective recovery of braking energy can be realized. A relevant mathematical model is built and a simulation is conducted to analyze the performance of HHV equipped with that CVT in typical urban driving conditions. The results demonstrate that the HHV can achieve energy savings of 10 . 4% and 16 . 4% respectively in two different situations compared with origi-nal gasoline vehicle.%本文中提出了一种液压混合动力无级变速器，它将发动机的输出功率分流为液压功率和机械功率两部分，通过调整两部分功率的比值，能实现无级变速，还能有效回收车辆的制动能量。通过建立数学模型和仿真，分析了装用该变速器的液压混合动力汽车在典型城市工况下的性能，结果表明，与原汽油车相比，该混合动力汽车在两种不同运行情形下分别节能10.4%和16.4%。
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