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US08984872B2 Hydraulic accumulator fluid charge estimation system and method 有权
液压蓄能器液体充量估算系统及方法

Hydraulic accumulator fluid charge estimation system and method
Abstract:
A method for estimating a fluid charge of a hydraulic accumulator includes determining a first accumulator pressure at a first time with a pressure sensor, the first time during accumulator charging; determining a second accumulator pressure at a second time with the pressure sensor, the second time during accumulator charging; determining a first fan speed at the first time; determining a second fan speed at the second time; and estimating the fluid charge of the hydraulic accumulator as a function of the first accumulator pressure, the second accumulator pressure, the first fan speed, and the second fan speed.
Abstract(Chinese):

用于估计液压蓄能器的流体充量的方法包括：在蓄能器充电期间第一次使用压力传感器确定第一时间的第一蓄能器压力; 在第二时间用压力传感器确定第二蓄能器压力，在蓄电池充电期间第二次; 首次确定第一个风扇速度; 在第二时间确定第二风扇速度; 以及作为所述第一蓄能器压力，所述第二蓄能器压力，所述第一风扇速度和所述第二风扇速度的函数来估计所述液压蓄能器的流体充量。

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