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Method and apparatus for adjusting the opening behavior of a fuel injector

A fuel injector and behavioral technology, applied in the direction of fuel injection device, fuel injection control, special fuel injection device, etc., can solve the problem of high cost

Active Publication Date: 2022-02-08
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, it has been possible to solve this problem using only relatively small component tolerances, which requires considerable outlay and corresponding costs

Method used

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  • Method and apparatus for adjusting the opening behavior of a fuel injector
  • Method and apparatus for adjusting the opening behavior of a fuel injector

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Embodiment Construction

[0039] It should be noted that the embodiments described below are only a limited selection of possible different embodiments of the invention.

[0040] According to the invention, during or near the end of the manufacture of fuel injectors with solenoid drives, the steps described below for adjusting the opening behavior of each fuel injector are carried out in order to provide openings with at least approximately the same behavior of fuel injectors.

[0041] More specifically, a voltage pulse having a predetermined voltage is applied to each fuel injector. In this regard, the predetermined voltage is preferably chosen so low (between 5 V and 12 V) that little or no eddy current occurs. The voltage pulse lasts at least as long as the fuel injector is fully opened. At the same time, the time profile of the intensity of the current flowing through the solenoid driver is acquired. In this regard, the intensity of the current is sampled and stored, for example, at a predetermi...

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PUM

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Abstract

A method for adjusting the opening behavior of a fuel injector with a solenoid drive is described. The method has the steps of: (a) applying a voltage pulse having a predetermined voltage to the solenoid driver, (b) detecting a time profile of the intensity of the current flowing through the solenoid driver, (c) detecting The detected time curve is compared with a reference curve, and (d) a mechanical parameter value of the fuel injector is adjusted to reduce a deviation between the detected time curve of current intensity and the reference curve. An apparatus and computer program are also described.

Description

technical field [0001] The invention relates to the technical field of fuel injectors. The invention relates in particular to a method for adjusting the opening behavior of a fuel injector with a solenoid drive and to a computer program for implementing the method. Furthermore, the invention relates to a device for adjusting the opening behavior of a fuel injector with a solenoid drive. Background technique [0002] During the operation of directly operated coil injectors for motor vehicles with internal combustion engines, especially fuel injectors, at the same current and voltage values, electrical, magnetic and mechanical tolerances cause the injectors to differ in time opening and closing behavior and thus lead to a change in the injection quantity. [0003] As the injection time becomes shorter, the relative difference in the injected quantity from one injector to another becomes larger. These relative differences in volume have been small so far. Today's requiremen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/20F02M61/16F02M65/00F02D41/24
CPCF02D41/20F02D41/2432F02D2041/2051F02D2041/2058F02M61/161F02M2200/8092F02D2041/2055F02M51/061
Inventor F.邓克U.瓦格纳
Owner VTESCO TECH GMBH