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Oil sprayer oil spraying amount closed-loop control method

A closed-loop control and fuel injector technology, applied in fuel injection control, electrical control, engine control, etc., can solve problems such as no actual calculation, and achieve the effect of improving emissions and economy

Inactive Publication Date: 2019-08-23
GUANGXI YUCHAI MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of using the existing fuel injector, the injection quantity of the fuel injector only has the target value, and there is no calculation for the actual injection quantity of the fuel injector, which belongs to the open-loop control. There is no actual calculation and no closed-loop method

Method used

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Embodiment Construction

[0016] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0017] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0018] Such as Figure 1 to Figure 3 as shown, figure 1 It is a schematic flowchart of a closed-loop control method for fuel injection quantity of an injector according to an embodiment of the present invention; figure 2 It is a structural schematic diagram of the fuel injection system according to the closed-loop control method of the fuel injection volume of the fuel injector according to an embodiment of the present i...

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Abstract

The invention discloses an oil sprayer oil spraying amount closed-loop control method. The method includes the steps that a cylinder pressure sensor is disposed on an air cylinder and used for detecting the pressure in the air cylinder in real time; an ECU receives a pressure value, monitored by the cylinder pressure sensor, in the air cylinder, the difference between the pressure value in the aircylinder and a pressure value in a common rail pipe is obtained, and thus the before-and-after pressure difference value of an oil sprayer is obtained; the actual oil spraying amount of the oil sprayer is worked out through the before-and-after pressure difference value of the oil sprayer, the spraying cross-sectional area of the oil sprayer and the powering-on time of oil sprayer; and the difference between a target oil spraying amount of the oil sprayer and the actual oil spraying amount of the oil sprayer is obtained, thus the oil spraying amount difference value is obtained, correction isperformed on target powering-on time through closed-loop control, over powering-on time compensation, of a PI controller, and thus final powering-on time is obtained. Accordingly, by means of the oilsprayer oil spraying amount closed-loop control method, the oil spraying amount of the oil sprayer can be accurately controlled.

Description

technical field [0001] The invention relates to the technical field of fuel injectors, in particular to a closed-loop control method for fuel injection quantity of a fuel injector. Background technique [0002] In the process of using the existing fuel injector, the injection quantity of the fuel injector only has the target value, and there is no calculation for the actual injection quantity of the fuel injector, which belongs to the open-loop control. There is no actual calculation and no closed-loop method. [0003] The information disclosed in this Background section is only for enhancing the understanding of the general background of the present invention and should not be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. Contents of the invention [0004] The object of the present invention is to provide a closed-loop control method for fuel injection quantity of a f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/40F02D41/38F02D41/14
CPCF02D41/1401F02D41/3809F02D41/40F02D2041/1409F02D2200/0602
Inventor 刘星
Owner GUANGXI YUCHAI MASCH CO LTD