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Actuation of fuel injectors for multiple injection

A fuel injector and driver technology, applied in fuel injection control, combustion engine, machine/engine, etc., can solve the problem of not considering the influence of relative quantity difference

Active Publication Date: 2021-06-08
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Variations of the quantity and number of injections of ever smaller and larger quantities per injection cycle (multiple injections) have resulted in the fact that the influence of relative quantity differences cannot be disregarded

Method used

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  • Actuation of fuel injectors for multiple injection
  • Actuation of fuel injectors for multiple injection

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0035] It is to be noted that the embodiments described hereinafter represent only a limited selection of possible embodiment variants of the invention.

[0036] figure 1 A circuit diagram 100 shows a portion of a circuit for actuating a fuel injector 110 according to one embodiment. Fuel injector 110 has terminals 112 (low side LS) and 114 (high side HS). Terminal 112 is connected to transistor 116 (low side transistor T LS ), and can therefore be grounded. terminal 114 through diode 118 (freewheeling diode D GND ) to ground.

[0037] figure 2 Graph 201 shows exemplary time current curves 231 - 234 according to one embodiment. Diagram 201 also shows the temporal profile of fuel quantity introduction 240 .

[0038] The following will refer to figure 1 and 2The actuation of the fuel injector according to the present invention will be described. In operation, transistor 116 is actuated so that terminal 112 is grounded. If there is residual magnetization in fuel injec...

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PUM

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Abstract

The invention describes a method for actuating a fuel injector for an internal combustion engine of a motor vehicle, the fuel injector having a magnetic coil drive. The fuel injector has a first connection and a second connection, wherein the first connection can be grounded via the switching element, and wherein the second connection is grounded. The method comprises the steps of: (a) actuating the switching element to ground the first terminal; (b) obtaining a time profile of the current intensity of the current flowing through the magnetic coil driver; and (c) applying a voltage pulse to the magnetic coil driver In order to initiate an opening sequence of the fuel injection, the duration of the voltage pulse is determined as a function of the time profile of the acquired current intensity. Furthermore, the invention describes an engine controller and a computer program.

Description

technical field [0001] The invention relates to the technical field of actuation of fuel injectors, in particular to a method for actuating a fuel injector with a magnetic coil drive for an internal combustion engine of a motor vehicle. Furthermore, the invention relates to an engine controller and a computer program. Background technique [0002] In the case of the operation of fuel injectors with a magnetic coil drive, due to capacitance differences, different sequential opening behaviors of the individual injectors and thus corresponding variations in the injection quantities result. [0003] As the injection time and / or electro / hydraulic separation time becomes shorter, the relative injection quantity difference between each injector and between injections increases. These relative magnitude differences are so far small and of no real significance. The ever-increasing and increasing variation of the injection quantity and number of injections per injection cycle (sever...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/20F02D41/40
CPCF02D41/20F02D41/402F02D2041/2003F02D2041/2041F02D2041/2044F02D2041/2058Y02T10/40F02D2041/2051
Inventor F.邓克
Owner VTESCO TECH GMBH