Injection nozzle

A fuel injection nozzle and nozzle seat technology, which is applied to fuel injection devices, special fuel injection devices, fuel injection devices with wear reduction measures, etc., can solve the problems of aggravating the wear of fuel system components, strong cavitation and corrosion, etc., Achieve the effect of prolonging service life, reducing cavitation and prolonging service life

Inactive Publication Date: 2015-02-04
CATERPILLAR MOTOREN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the chemical composition and physical properties of alternative fuels, alternative fuels can be highly cavitating and corrosive, and can increase wear on said fuel system components

Method used

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Embodiment Construction

[0029] The following is a detailed description of exemplary embodiments of the present disclosure. The exemplary embodiments described herein and illustrated in the accompanying drawings are intended to illustrate the principles of the disclosure and enable those of ordinary skill in the art to implement the disclosure in various environments and to use it for many different purposes. Therefore, these exemplary embodiments are not and should not be considered as a limiting description of the scope of patent protection. Rather, the scope of patent protection shall be defined by the appended claims.

[0030] The present disclosure is based on the recognition that an engine running on a fuel that may increase cavitation may be prone to shortened service life of the corresponding components of the fuel injection system due to increased surface corrosion and damage. In particular, increased surface wear may be the case when fuel is pressurized and / or directed around corners. Firs...

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Abstract

An injection nozzle (22) for mounting to a nozzle holder of a fuel injection system (1) of an internal combustion engine may comprise a sealing face (29) for providing a sealed connection to the nozzle holder, a needle guiding bore (34) for guiding a needle between a fuel injection state and a sealed state of the fuel injector. The needle guiding bore (34) may extend through the sealing face (29), being fluidly connected, at an injection side of injection nozzle (22), to an outside of the injection nozzle (22) via a plurality of nozzle spray holes (70). The needle guiding bore (34) may be widened to form a high pressure fuel chamber (36). A high pressure supply bore (38) may extend through the sealing face (29) and fluidly connect an opening in the sealing face (29) with the high pressure fuel chamber (36). A radial outer section (60) of a wall of the fuel supply channel (38) may smoothly transition into a wall of the high pressure fuel chamber (36). The high pressure supply bore (38) may be provided in a drop-like, rounded shape.

Description

technical field [0001] The present disclosure relates generally to fuel injection systems for internal combustion engines, and in particular to injectors for such fuel injection systems. Background technique [0002] The operation of internal combustion engines using alternative fuels can cause excessive wear of those components of the fuel injection system that are in contact with the alternative fuels. In particular, increased cavitation due to increased water content in alternative fuels can have an impact on fuel injection systems. [0003] Alternative fuels include, for example, first-generation biofuels (eg palm oil, canola oil, animal fat-based oils) and second-generation biofuels (eg oils made from non-food crops, ie waste biomass). Examples of second generation biofuels include "pyrolysis oils" obtained from the pyrolysis of eg wood or agricultural wastes such as wheat or corn straw, grasses, wood, wood chips, grapes and sugar cane. In particular, as described in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/18F02M61/10F02M55/00F02M61/16
CPCF02M2200/04F02M61/18F02M2200/02F02M2200/95F02M55/008F02M61/168F02M61/10F02M2200/03F02M61/14
Inventor A·冯德奥斯滕-扎克O·奥尔特
Owner CATERPILLAR MOTOREN
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