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AC drive for fuel injectors

A fuel injector and fuel injection technology, applied in fuel injection devices, fuel injection control, special fuel injection devices, etc., can solve problems such as unacceptable repeatability and instability

Active Publication Date: 2019-09-17
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Consequently, such subsequent fuel injection events can become unstable, resulting in unacceptable repeatability

Method used

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  • AC drive for fuel injectors
  • AC drive for fuel injectors
  • AC drive for fuel injectors

Examples

Experimental program
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Embodiment Construction

[0014] This disclosure describes concepts of the presently claimed subject matter with respect to exemplary applications for linear motion fuel injectors. The claimed subject matter however applies more broadly to any linear or nonlinear electromagnetic actuator using an energized coil that induces a magnetic field within a magnetic core, creating an attractive force that acts on a movable armature. Typical examples include fluid-controlled solenoid valves used on internal combustion engines, gasoline or diesel or CNG fuel injectors, and non-fluid-type solenoid valve actuators for positioning and control.

[0015] Referring now to the drawings, in which the drawings are for purposes of illustrating certain exemplary embodiments only and not for purposes of limitation, Picture 1-1 A non-limiting exemplary embodiment of an electromagnetically activated direct injection fuel injector 10 is schematically shown. Although a solenoid-actuated direct injection fuel injector is descri...

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PUM

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Abstract

Discloses a method for providing a consistent actuator event for each of a plurality of continuous actuator events for an electromagnetic actuator, comprising applying a first bidirectional current waveform to the first actuator event and then immediately applying a second bidirectional current waveform to the second actuator event of the first actuator event. The first bidirectional current waveform comprises applying a current in the first direction when the actuator is commanded to actuate and applying a current in the reverse second direction when the actuator is commanded to a stationary position. The second bidirectional current waveform comprises applying a current in the reverse second direction when the actuator is commanded to actuate and applying a current in the first direction when the actuator is commanded to a stationary position.

Description

technical field [0001] This invention relates to solenoid activated fuel injectors for use in internal combustion engines. Background technique [0002] Fuel injectors are used to inject pressurized fuel directly into the combustion chamber of an internal combustion engine. Known fuel injectors include an electromagnetically activated solenoid device that overcomes a mechanical spring to open a valve located at the tip of the injector to allow fuel flow therethrough. The injector driver circuit controls the flow of current to the solenoid activated solenoid device to open and close the injector. The injector driver circuit can operate in a peak-and-hold control configuration or a saturated switching configuration. [0003] Fuel injectors are calibrated using calibration values ​​including injector activation signals (including injector opening times) or injection durations and corresponding metered or delivered injected fuel masses operating at predetermined or known fuel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/24F02D41/30F02M51/06F16K31/06
CPCF02D41/20F02D2041/2044F02D2041/2058H03K17/64F02M51/0671F02M57/005F02M2200/247F02M2200/24F16K31/0675F02D2041/2055F02D41/402F02D2041/2034F02M51/061H01F7/1607H01F7/18
Inventor T·W·尼尔S·戈帕拉克里希南A·M·奥莫卡德C·S·纳姆杜里
Owner GM GLOBAL TECH OPERATIONS LLC