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A control method, device, electronic equipment and storage medium of a fuel injector

A control method and fuel injector technology, which are applied in the field of devices, fuel injector control methods, electronic equipment and storage media, can solve the problem of reducing emissions, low engine control efficiency, and difficulty in ensuring consistent fuel injection characteristics between injectors to reduce the generation of emissions and improve the control efficiency

Active Publication Date: 2022-05-24
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the increase of fuel injection pressure and the application of multiple injection modes, the fuel injection pulse width of the engine injector is often less than 1ms. At this time, the injector works in the ballistic area or transition area, and the individual injectors There is a certain difference in the fuel injection characteristics of the ballistic zone and the transition zone, and it is difficult to ensure the consistency of the fuel injection characteristics between injectors
The control efficiency of the engine to the fuel injector is low, and it is impossible to achieve precise control of small fuel injection and reduce the generation of emissions

Method used

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  • A control method, device, electronic equipment and storage medium of a fuel injector
  • A control method, device, electronic equipment and storage medium of a fuel injector
  • A control method, device, electronic equipment and storage medium of a fuel injector

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Embodiment 1

[0024] figure 1 This is a schematic flowchart of a method for controlling a fuel injector provided in Embodiment 1 of the present invention. This embodiment can be applied to the situation where the fuel injector is controlled by a vehicle engine. The method can be implemented by a fuel injector. control device to execute. like figure 1 As shown, the method specifically includes the following steps:

[0025] Step 110: Determine whether the difference between the actual rail pressure and the preset expected rail pressure within a preset time period is within a preset rail pressure difference threshold.

[0026] Among them, the control process of the fuel injector is the self-learning process of the EMS (Engine Management System, engine management system). The oil characteristics are self-learned, and the fuel injection amount is determined by self-learning. The fuel injection characteristics can include rail pressure and injection pulse width, etc. The self-learning process...

Embodiment 2

[0054] figure 2 This is a schematic flowchart of a method for controlling a fuel injector provided in Embodiment 2 of the present invention. This embodiment is further optimized based on the above-mentioned embodiment, and the method can be executed by a control device for a fuel injector. like figure 2 As shown, the method specifically includes the following steps:

[0055] Step 210: Determine whether the difference between the actual rail pressure and the preset expected rail pressure within a preset time period is within a preset rail pressure difference threshold.

[0056] Step 220: If yes, determine that the actual rail pressure is the desired rail pressure, and determine the actual fuel injection pulse width according to the actual rail pressure.

[0057] Step 230: Divide the actual fuel injection pulse width into a first fuel injection pulse width and a second fuel injection pulse width; wherein, the pulse width value of the first fuel injection pulse width is a pre...

Embodiment 3

[0067] image 3 This is a structural block diagram of a fuel injector control device provided by the third embodiment of the present invention, which can execute a fuel injector control method provided by any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method. . like image 3 As shown, the device specifically includes:

[0068] The rail pressure difference judgment module 301 is used for judging whether the difference between the actual rail pressure and the preset expected rail pressure within a preset time period is within a preset rail pressure difference threshold;

[0069] an actual pulse width determination module 302, configured to determine the actual rail pressure as the desired rail pressure, and determine the actual fuel injection pulse width according to the actual rail pressure;

[0070] The fuel injection pulse width division module 303 is configured to divide the actual fuel injection p...

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Abstract

The embodiment of the invention discloses a fuel injector control method, device, electronic equipment and storage medium. Wherein, the method includes: judging whether the difference between the actual rail pressure and the preset expected rail pressure within the preset time is within the preset rail pressure difference threshold; if so, determining that the actual rail pressure is the expected rail pressure, And determine the actual fuel injection pulse width according to the actual rail pressure; divide the actual fuel injection pulse width into the first fuel injection pulse width and the second fuel injection pulse width; wherein, the pulse width of the first fuel injection pulse width The width value is the preset expected pulse width value; the actual moment when the injector needle valve is closed under the first fuel injection pulse width is collected, and the injector is determined according to the actual moment and the preset moment when the injector needle valve is closed. The difference value of the closing time of the needle valve is used for the engine to control the fuel injector according to the difference value. The self-learning correction of the injector needle valve closing time is realized, and the control accuracy of the injector is improved.

Description

technical field [0001] Embodiments of the present invention relate to vehicle control technologies, and in particular, to a control method, device, electronic device, and storage medium for a fuel injector. Background technique [0002] Gasoline direct injection has been widely studied and applied as a technology to effectively improve engine thermal efficiency and reduce engine emissions. In order to meet more and more stringent emission standards, the fuel injection pressure of direct injection engines is also constantly increasing. [0003] With the increase of the fuel injection pressure and the application of the multiple injection mode, the fuel injection pulse width of the engine injector is less than 1ms in many cases. At this time, the injector works in the ballistic area or the transition area, and the individual injectors are There is a certain difference in the injection characteristics of the ballistic area and the transition area, and it is difficult to ensure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/40F02D41/38F02D41/24
CPCF02D41/40F02D41/38F02D41/2441F02D41/2451
Inventor 欣白宇孙鹏远高天宇宋同好周鑫苗志慧刘笑飞
Owner CHINA FIRST AUTOMOBILE