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Fuel injector assembly

A technology for fuel injectors and assemblies, which is applied to fuel injection devices, special fuel injection devices, fuel injection devices with stress reduction measures, etc., and can solve problems such as hole structure cracking, material/hole structure fatigue, damage, etc.

Inactive Publication Date: 2019-06-04
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Repeated cycling over extreme temperature ranges can lead to material / pore structure fatigue due to repeated expansion and contraction of the material, resulting in cracking and / or other damage to the pore structure, especially in the region of the hole adjacent to the combustion chamber

Method used

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  • Fuel injector assembly
  • Fuel injector assembly
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Embodiment Construction

[0021] Reference will now be made in detail to presently preferred compositions, examples, and methods of the present disclosure, which constitute the best modes presently known to the inventors for practicing the disclosure. The drawings are not necessarily to scale. However, it should be understood that the disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various and alternative forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for any aspect of the disclosure and / or as a representative basis for teaching one skilled in the art to various aspects of the disclosure. sexual basis.

[0022] Unless otherwise expressly stated in the examples or elsewhere, all numerical quantities in this specification expressing materials or reaction states and / or applications are to be understood as being modified by the word "about" when describing the broadest scope of the prese...

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Abstract

A fuel injector assembly for a vehicle includes an engine head, a fuel injector, and a preloading insert. The engine head defines a bore wherein the bore includes a head region proximate to the corresponding combustion chamber. The pre-loading insert may be disposed within the bore at the head region. The pre-loading insert may be configured to apply a tensile hoop stress to the head region of thebore causing plastic deformation to the head region while also supporting the fuel injector within the bore. The fuel injector may be configured to dispense fuel into a combustion chamber.

Description

technical field [0001] The present disclosure relates generally to vehicle engines, and more particularly, to fuel injector assemblies for vehicles. Background technique [0002] The present invention relates generally to fuel injector assemblies that can be subjected to thermomechanical conditions while the fuel injector assembly is subjected to temperatures that cycle between temperatures in excess of 300 degrees Celsius due to combustion reactions in the engine up to freezing ambient temperatures after the engine of the vehicle is cooled. fatigue. [0003] The fuel injector assembly may include an engine head defining a bore, wherein the bore is configured to receive a fuel injector having an outer diameter that is smaller than an inner diameter of the bore. Thus, conventional bores (and their materials, such as aluminum) are subject to repeated compression loads due to thermal material expansion as engine temperatures rise above 300 degrees Celsius. Conventional bores ...

Claims

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Application Information

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IPC IPC(8): F02M61/14
CPCF02M2200/8061F02M2200/9076F02M2200/03F02F1/242F02M61/14
Inventor A·K·萨胡A·K·塞西
Owner GM GLOBAL TECH OPERATIONS LLC
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