Energy-saving control method for excavator and excavator
An energy-saving control and excavator technology, which is applied in the direction of earth mover/shovel, construction, etc., can solve the problem of serious energy consumption, insufficient performance of the whole machine, and inability to achieve the maximum output power of the engine and the power required by the load. problems such as optimal matching to achieve the effect of reducing energy consumption and improving the performance of the whole machine
Inactive Publication Date: 2015-03-18
SANY HEAVY MACHINERY
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Problems solved by technology
[0003] In order to solve the problem that the current fixed working point control method of the excavator engine cannot achieve the optimal match between the output power of the engine and the power required by the load, and the performance of the whole machine cannot be fully utilized, resulting in serious energy consumption of the system. Energy saving control method of excavator and excavator
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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0035] An embodiment of the present invention provides an energy-saving control method for an excavator, including the following steps,
[0036] According to the universal characteristic curve of the engine, the corresponding engine load power-best speed curve is obtained, such as figure 1 As shown in , the intersection point of the equal power curve on the universal characteristic curve of the engine and the optimal fuel consumption curve is the corresponding load power-optimum speed curve.
[0037] The controller collects the control signal input of the engine and the load, and calculates the power P required by the current load E , where the control signals input by the engine and the load include the current engine speed n, the ma...
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The invention discloses an energy-saving control method for an excavator and the excavator and belongs to the technical field of energy-saving control. The energy-saving control method comprises the following steps of: obtaining a corresponding load power-optimal rotating speed curve of an engine according to a universal characteristic curve of the engine; acquiring control signal input of the engine and a load and calculating to obtain power PE required by the current load by a controller; obtaining the current optimal rotating speed nBest of the engine according to the load power-optimal rotating speed curve of the engine; and outputting a rotating speed control signal and adjusting the rotating speed of the engine to reach the optimal rotating speed nBest by the controller. According to the energy-saving control method disclosed by the invention, input signals of the engine and the load are acquired and the optimal rotating speed of the engine is calculated according to the load power-optimal rotating speed curve by the controller; the signal is sent to adjust the rotating speed of the engine by the controller, so that the engine works nearby an optimal oil consumption area, the energy consumption of the system is reduced and the performance of an entire machine is improved.
Description
technical field [0001] The invention relates to the technical field of energy-saving control, in particular to an energy-saving control method of an excavator and the excavator. Background technique [0002] At present, most of the excavators on the market mainly adopt the control mode of the fixed working point of the engine that has nothing to do with the external load, that is, the output power of the fixed engine. But in actual work, the working conditions of the excavator are very complicated, and the external load changes frequently: when the external load changes from large to small, the control method of the fixed working point cannot adjust the power of the engine in time, resulting in the output power of the whole machine being much greater than The load actually needs power, which leads to the waste of some energy; similarly, when the external load changes from small to large, this control method cannot increase the output power in time, resulting in a serious sta...
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IPC IPC(8): E02F9/20
Inventor 曹东辉石向星孙军
Owner SANY HEAVY MACHINERY