Method for controlling energy conservation on basis of pressure judgment

Abstract

The invention discloses a method for controlling energy conservation on the basis of pressure judgment, and belongs to the field of mechanical control. The method is applicable to standard operation procedures of engineering machinery and vehicles. The method includes determining a product coefficient t according to pressure difference between a front pump and a rear pump; respectively computing torque T1 and torque T2 of the front pump and the rear pump according to formulas of T1=p1Xq1 and T2=p2Xq2; computing total torque T according to a formula of T=T1Xt+T2; determining that a high-load zone exists if the T is higher than or equal to 200-300Nm and enabling an engine to rotate at a high rotational speed; determining that a low-load zone exists if the T is lower than 200-300Nm and enabling the engine to rotate at a low rotational speed. According to the technical scheme, the method has the advantages that the low-load zone can be discriminated according to the pressure difference between the front pump and the rear pump, corresponding control is taken, accordingly, an energy conservation technical effect can be realized, the modification cost is low, and the method is easy to implement.

Description

technical field [0001] The invention belongs to the field of mechanical equipment control and relates to an energy-saving control method, in particular to an energy-saving control method suitable for construction machinery based on pressure judgment. Background technique [0002] With the development of the global economy, construction machinery has been developed unprecedentedly. Although hydraulic excavators can perform various operations with high power and high sensitivity, the total utilization rate of their energy is only about 20%. Huge energy loss makes energy-saving technology a major topic at present. [0003] Such as figure 1 As shown in , at present, most traditional excavators use non-electrically controlled engine control mode and constant speed control mode. A standard action of excavator 90-degree slewing loading is divided into four links: excavation, boom raising + slewing, unloading, boom lowering + slewing, of which the first three links are high energy...

AI Technical Summary

Problems solved by technology

[0004] (1) Since the standard process of 90-degree rotary loading of the excavator is controlled by the same target speed and maximum set torque, the power waste is serious;

[0005] (2) Since the load of the excavator often changes suddenly during the operation process, the actual demand load is judged based on the calculated actual torque, which often produces deviations and cannot really achieve energy saving

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