A method and device for automatic load identification and optimal matching

Abstract

The invention discloses a load automatic identification and optimization coupling method, which comprises the steps of capturing the dots on a hydraulic pump load mode curve in a preset time; presetting a pressure-discharge efficiency boundary based on the pump efficiency curve; making statistics of the characteristic points distributed on the pump load mode curve under current condition; computing a radio value based on the formula of R=(Pq1-Pc1) / Pq1 and judging if 0<=R<=n, the current load mode curve is maintained, if R>n or R<0, R is equal to the pressure of the percentage pressure cone apex q1 and is intersected with the efficiency boundary at the point C2, and the load mode curve passing through the point C2 is the new load mode curve. According to the method, the work condition of the hydraulic pump is used to judge the load and if the work is in high efficiency zone; the hydraulic pump is adjusted to an optimum load mode by calculating; and the hydraulic pump can work in the optimum load mode always, which reduces oil consumption. The invention also discloses a load automatic identification and optimization coupling apparatus.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method and a device for automatic load identification and optimal matching of engineering machinery such as excavators. Background technique [0002] The operation of the current excavator is set with fixed engine speed gear and power mode gear. The driver manually selects the speed mode and load mode, and then the controller controls the engine throttle and pump displacement according to the selected input information. [0003] Such as figure 1 As shown, set different engine speed gears through buttons or knobs, such as 1900rpm, 1800rpm, 1600rpm, etc. In actual work, the engine will work near the set speed; figure 2 The schematic diagram of the load mode of the pump is shown. The load mode is generally divided into power gear and economic gear, which limit the maximum torque of the pump. The P curve and E curve in the figure are pre-set, representing the maximum load of the ...

AI Technical Summary

Problems solved by technology

[0004] The driver selects the engine speed gear and power mode gear based on experience. Improper selection may cause the excavator to work in a low-efficiency area, causing the excavator to waste fuel during operation; or there is no optimal gear setting for the current working condition The combination of speed gear and power mode gear, the gear selected by the driver can only be close to the best match but cannot achieve the best match, which also results in high fuel consumption of the excavator

[0005] That is to say, the speed of the engine and the load gear of the pump are pre-set, but in reality, the working conditions of the excavator are changeable and complex, manual selection may not be able to select the best matching mode, the pre-set The gear may not be suitable for the current working conditions, and it is not the best match anyway

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