Power matching control method and device

A control method and control device technology, applied in engine control, machine/engine, mechanical equipment, etc., can solve the problems of time delay in the speed acquisition process, insufficient power matching control process, and affecting the normal operation of mechanical equipment, etc., to achieve The effect of power matching

Active Publication Date: 2019-08-16
WEICHAI POWER CO LTD +1
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Problems solved by technology

However, this control method has at least the following disadvantages: there is a delay in the speed acquisition process, which makes the power matching control process not timely enough, which in turn affects the normal operation of mechanical equipment

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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The invention provides a power matching control method and device. The method comprises the steps that the real-time pressure value of a hydraulic pump of mechanical equipment is obtained, and the pressure value is input into a differential control algorithm to obtain a pump magnetic valve first current value; the real-time rotation speed of an engine in the mechanical equipment is obtained and input into a PID control algorithm to obtain a pump magnetic valve second current value; the pump magnetic valve first current value and the pump magnetic valve second current value are subjected to weighted sum so that a pump magnetic valve target current value can be obtained; and the pump displacement of the hydraulic pump is controlled according to the obtained pump magnetic valve target currentvalue, and accordingly, the power of the hydraulic pump is controlled. According to the power matching control device, the pump displacement of the hydraulic pump is controlled through coordination of the pressure value and the real-time rotation speed, when the pressure value is changed or the rotation speed is decreased by a value exceeding the set value, the pump displacement of the hydraulicpump is adjusted, accordingly, the power of the hydraulic pump is controlled, and it is achieved that the power of the engine and the power of the hydraulic pump are matched.

Description

technical field [0001] The invention relates to the technical field of equipment control, in particular to a power matching control method and device. Background technique [0002] In industry, large-scale mechanical equipment is very common, such as excavators. Such large-scale mechanical equipment often chooses hydraulic pumps as power components. The power components are driven by the power provided by the engine. The oil is sucked in, and by squeezing the oil in the seal chamber, pressure is generated, which discharges the pre-intake oil from the hydraulic pump. Among them, the amount of oil discharged is in units of pump displacement, and the pump displacement refers to the volume of oil discharged by the pump shaft of the hydraulic pump for one revolution. [0003] During the working process of the hydraulic pump, if the power is greater than the maximum power provided by the engine, it will cause the engine to slow down or even stall. In order to avoid this situatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D29/04
CPCF02D29/04
Inventor 宋亚召赵金光于鹏飞
Owner WEICHAI POWER CO LTD
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