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Engineering machinery limit load control method and device

A technology of construction machinery and extreme load, applied in engine control, mechanical equipment, transportation and packaging, etc., can solve problems such as danger and engine flameout, and achieve the effect of preventing engine flameout.

Inactive Publication Date: 2013-01-16
SANY AUTOMOBILE HOISTING MACHINERY
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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following problems: the engine has a rated power corresponding to each rotational speed, and the rated power is the limit load power of the engine at this rotational speed. During the process of construction machinery, if the output power generated by controlling the movement of mechanical parts through the action handle is higher than the rated power at the current engine speed, the engine will suddenly stop and may cause more serious dangers

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  • Engineering machinery limit load control method and device
  • Engineering machinery limit load control method and device
  • Engineering machinery limit load control method and device

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Embodiment Construction

[0018] The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. 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.

[0019] The core idea of ​​the present invention is: determine the displacement threshold of the oil pump according to the rated power at the current engine speed, and then set the upper limit of the displacement that the action handle can control according to the displacement threshold, so that the upper limit of the displacement that the action handle can control is not greater than the displacement threshold. The maximum output power of the hydraulic system can only reach the rated power ...

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Abstract

The invention discloses an engineering machinery limit load control method and an engineering machinery limit load control device, which are applied to engineering machinery configured with a hydraulic system. The method comprises the following steps: obtaining a nominal power of an engine at the current rotate speed; determining the discharge threshold of an oil pump according to the nominal power, and arranging the upper limit of the controllable discharge capacity by an action handle according to the discharge threshold, wherein the upper limit of the discharge capacity is not more than the discharge threshold. By adopting the invention, the phenomenon of engine flameout resulting from the fact that the output power is larger than the nominal power can be prevented.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a method and device for controlling the limit load of construction machinery. Background technique [0002] In the field of construction machinery, hydraulic systems are being used more and more because of their small size, light weight, small moment of inertia, stable movement, long service life, and wide-range stepless speed regulation. The hydraulic system uses an oil pump as the power unit, and the oil pump is generally driven by a diesel engine. [0003] When operating construction machinery equipped with a hydraulic system, the operator can control the speed of the engine through the manual throttle, and the engine will push the oil through the outlet of the oil pump into the execution unit (such as a hydraulic cylinder) during rotation to push the mechanical parts In addition, the operator can also control the displacement of the oil pump through the action...

Claims

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Application Information

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IPC IPC(8): F02D29/04
CPCF15B20/00F02D29/04E02F9/2235B66C13/18E02F9/2246
Inventor 颜理罗军郭亿
Owner SANY AUTOMOBILE HOISTING MACHINERY
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