A low idle speed control method and device

A control method and low idle speed technology, applied in the control field, can solve the problems of complex adjustment process and long adjustment period, and achieve the effect of smooth control, solving overshoot, and convenient and quick overshoot.

Active Publication Date: 2016-02-10
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a low idle speed control method and device to solve the technical problems of long adjustment period and complicated adjustment process that occur when the prior art solves the overshoot problem

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  • A low idle speed control method and device
  • A low idle speed control method and device
  • A low idle speed control method and device

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Embodiment Construction

[0050] 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.

[0051]Embodiments of the present invention provide a low idle speed control method and device. When the engine speed meets the preset low idle speed control conditions, the original idle speed setting value is corrected (that is, the current idle speed setting value is raised to the current idle speed setting value) by relying on the speed characteristics of the engine itself. Then control the current idle speed setting value to decrease according to the predet...

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Abstract

The invention provides a low-idle-speed control method and a low-idle-speed control device. The low-idle-speed control method includes acquiring rotation speed of an engine, and increasing an original idle speed setting value as current idle speed setting value if the rotation speed is accordant with preset low idle speed control conditions; controlling the current idle speed setting value to decrease as preset slope which is matched with a rotation decreasing curve of the engine; outputting the idle speed setting value during decreasing to a PI (proportional integral) controller in real time so that the PI controller can control the rotation speed of the engine according to the outputted idle speed setting value. According to the above technical scheme, smooth control of the rotation speed of the engine can be realized, and the technical problems about long regulation period and complicated regulation process due to overregulation in the prior art are solved.

Description

technical field [0001] The invention relates to the control field, in particular to a low idle speed control method and device. Background technique [0002] When using the PI controller (proportional-integral control, P is proportional control, the output is proportional to the input error signal; I is integral control, the integrator accumulates the error to eliminate the steady-state error) to control the idle speed of the engine, generally Under normal circumstances, the PI controller can reasonably control the idle speed after the engine enters a steady state. For a period of time below the fixed value, the engine speed will rise to the low idle speed setting value only when the I controller accumulates to a certain value, resulting in an overshoot phenomenon during the idle speed control process, affecting the normal driving of the driver. [0003] There are following two solutions in the prior art: [0004] One is to adjust the integral time of the I controller as l...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/08
Inventor 刘栋李少佳
Owner WEICHAI POWER CO LTD
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