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Engine rotating speed control method, engine rotating speed control equipment, engine rotating speed control system and engineering machinery

A technology for engine speed and control equipment, applied in engine control, mechanical equipment, machines/engines, etc., can solve problems such as engine speed oscillation, time delay, and inability to control engine speed drop in time, so as to suppress sudden load changes and reduce overshoot , The effect of reducing the engine drop rate

Active Publication Date: 2014-09-10
SHANGHAI ZOOMLION HEAVY IND PILING MACHINERYCO +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in this engine speed control method, due to the sudden change in load, there will be a time delay in the change of the engine speed, so the control method has hysteresis and cannot control the engine speed drop in time, and will cause the engine speed to oscillate frequently in a small range

Method used

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  • Engine rotating speed control method, engine rotating speed control equipment, engine rotating speed control system and engineering machinery
  • Engine rotating speed control method, engine rotating speed control equipment, engine rotating speed control system and engineering machinery
  • Engine rotating speed control method, engine rotating speed control equipment, engine rotating speed control system and engineering machinery

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Embodiment approach

[0026] According to an embodiment of the present invention, the target displacement output value q p According to the engine speed drop value (e n ) feedback control algorithm, for example, according to the PID control algorithm:

[0027] q p = k p · e n + k i · ∫ e n + k d · d e n t Equation (2)

[0028] Among them, the engine drop speed value e n is the target engine speed n t and the engine speed n of the current cycle 1 The difference, engine target speed n t and the engine speed n of the current cycle 1 Measured by the engine speed sensor 50, k p 、k i 、k d They are proportional, integral, and ...

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Abstract

The invention discloses an engine rotating speed control method, engine rotating speed control equipment, an engine rotating speed control system and an engineering machinery. The method comprises the following steps: receiving a current period displacement output value qm1 and a target displacement output value qp of a variable displacement pump of the engineering machinery; according to the current period displacement output value qm1 and the target displacement output value qp, calculating a displacement control quantity qt of the variable displacement pump; according to the displacement control quantity qt of the variable displacement pump, the maximum current Imax of a displacement control valve of the variable displacement pump, a start current Imin of the displacement control valve of the variable displacement pump and the maximum displacement qmax of the variable displacement pump, obtaining a control current It of the displacement control valve of the variable displacement pump so as to control the rotating speed of an engine by regulating the displacement of the variable displacement pump. According to the invention, the rotating speed of the engine can be timely controlled so as to be kept stable; not only is load sudden change integrally inhibited and the deceleration rate of the engine is effectively reduced, but also the additional problems of overshooting, oscillation and the like which are possibly generated by a deceleration prevention model in the prior art are reduced.

Description

technical field [0001] The present invention relates to the field of engineering machinery, in particular to a method for controlling engine speed, an engine speed control device, an engine speed control system, and an engineering machine. Background technique [0002] During the operation of construction machinery (take rotary drilling rig as an example), the engine of the construction machinery cannot respond in time due to a sudden change in load (increase or decrease), causing the engine speed to rise or fall suddenly, which seriously affects the operation stability. Work efficiency and engine performance (for example, failures that cause the engine to smoke, stall, etc.). [0003] In view of the above problems, in the prior art, the PID (Proportional, Integral and Derivative) control method is generally used to control the variable pump displacement output by the controller according to the engine speed drop value (the difference between the target speed and the current...

Claims

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Application Information

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IPC IPC(8): F02D29/00
Inventor 赵亮何欢肖定成
Owner SHANGHAI ZOOMLION HEAVY IND PILING MACHINERYCO
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