The invention relates to a hydraulically actuated continuously variable transmission (9) for or in a hybrid or a pure electric vehicle, comprising a primary hydraulically adjustable pulley (93) with a primary hydraulic cylinder (202), a secondary hydraulically adjustable pulley (94) with a secondary hydraulic cylinder (203), a flexible drive element (95) that is wrapped around and in friction contact with those pulleys (93, 94) and an electro-hydraulic control system for controlling a hydraulic pressure in at least said hydraulic cylinders (202, 203). According to the invention, the transmission is provided with two electrically driven pumps (201, 205), whereof a first pump (201) is capable of supplying hydraulic fluid to at least one of the said hydraulic cylinders (202, 203) via a first hydraulic line (204) and whereof a second pump (205) is capable of supplying hydraulic fluid to the said friction contact (216) between the flexible drive element (95) and the pulleys (93, 94) via a second hydraulic line (206).
本发明涉及一种用于或在混合动力或纯电动车辆中的液压驱动的无级变速器(9),其包括具有初级液压缸(202)的初级液压可调带轮(93)、具有次级液压缸(203)的次级液压可调带轮(94)、缠绕这些带轮(93、94)并与这些带轮摩擦接触的柔性驱动元件(95)以及用于控制至少所述液压缸(202、203)中的液压压力的电动液压控制系统。根据本发明,所述变速器设置有两个电动泵(201、205),其中,第一泵(201)能够经由第一液压管线(204)向至少一个所述液压缸(202、203)供应液压流体,第二泵(205)能够经由第二液压管线(206)将液压流体供应至柔性驱动元件(95)与带轮(93、94)之间的所述摩擦接触(216)。
HYDRAULICALLY ACTUATED CONTINUOUSLY VARIABLE TRANSMISSION AND METHOD FOR OPERATING SAME
液压致动的无级变速器以及用于操作其的方法
2021-11-12
Patent
Electronic Resource
Chinese
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