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Annulus nozzle injector with tangential fins

A technology of injectors and fuel injectors, applied in fuel injection devices, machines/engines, electrical control, etc., can solve the problems of reduced engine power torque, reduced fuel injection efficiency, and reduced effective flow area of ​​nozzle holes

Inactive Publication Date: 2017-05-10
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prolonged buildup due to fuel dripping can also reduce the effective flow area of ​​the nozzle holes, thereby reducing the efficiency of fuel injection, and thus a reduction in engine power and / or torque may be observed

Method used

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  • Annulus nozzle injector with tangential fins
  • Annulus nozzle injector with tangential fins
  • Annulus nozzle injector with tangential fins

Examples

Experimental program
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Embodiment Construction

[0020] The following description refers to adjustments that can be incorporated in as in the figure 1 Systems and methods for the operation of a direct fuel injector in an engine as shown in . The engine controller may send control signals to electric actuators coupled to the needles and nozzles of the direct fuel injectors to adjust the figure 2 with image 3 The position of the nozzle is shown in . The controller can execute control programs such as Figure 5 Example procedure) to transition the nozzle from a default position in which the fuel passage is held closed to a position in which the nozzle is moved into the combustion chamber to open the fuel passage. A tangential fin on the face of the nozzle ( Figure 4 ) are additionally used to create a cone-shaped fuel spray with rotational momentum that allows efficient air-fuel mixing. Figure 6-9 An embodiment of a fuel injector assembly having an injector needle that undergoes a two-stage activation and two-stage dea...

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Abstract

The invention relates to an annulus nozzle injector with tangential fins. Methods and systems are provided for direct fuel injection, wherein a fuel injector comprises an injector needle coupled to a frustum shaped nozzle. During a fuel injection event, the injector needle may be moved outward to create an annulus nozzle. In this way, the fuel injector may inject fuel with a cone shaped spray pattern, reducing the spray penetration of the injected fuel.

Description

technical field [0001] The present invention generally relates to systems and methods for direct fuel injectors for internal combustion engines. Background technique [0002] Internal combustion engines may use direct fuel injection, where fuel is injected directly into the engine cylinders to improve fuel gas mixing. In conventional direct fuel injectors, injector nozzle hole configuration and geometry can adjust combustion characteristics and affect vehicle emissions. Fuel is typically injected from a pocket into an engine cylinder at the tip of a fuel injector needle through a plurality of holes configured in various ways to increase atomization and improve air-fuel mixing. [0003] Abani et al. in WO2014052126 show an example method for improving air-fuel mixing with direct injectors. In it, the injector nozzle contains a plurality of holes that are skewed relative to the axis of the injector so as to impart angular momentum on a plume of injected fuel. [0004] Howev...

Claims

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Application Information

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IPC IPC(8): F02M61/10F02M61/18F02M61/16
CPCF02M61/10F02M61/16F02M61/1873F02D41/20F02D41/38F02D41/402F02M61/08F02M61/162F02D2041/389F02M51/06F02D41/26
Inventor 张小钢
Owner FORD GLOBAL TECH LLC
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