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Egr ejector system

A technology of injector and exhaust gas recirculation, which is applied in the direction of charging system, fluid mixer, machine/engine, etc., and can solve problems such as fuel economy loss

Inactive Publication Date: 2021-03-30
EATON INTELLIGENT POWER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such systems often operate at undesired pressures and result in fuel economy losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] Perform computational fluid dynamics calculations to analyze various parameters of the injector, including the size of the diameter and radius of the EGR duct and air duct, the angle A defined by the angle between the outlet flow path and the inlet flow path, the Angle B of the lower angled face. Parameters shown in the drawings and as shown in the various tables below include: P1 : inlet pressure of intake air, P3 : outlet pressure of intake air, P5in: inlet pressure of EGR gas, and P5ext: outlet pressure of EGR gas.

[0038] Table 1 covers the operating conditions under C100 Figure 5 with Image 6 Pressure parameters for various sizes of injectors at the locations shown. Figure 5 with Image 6 Injector positions A and C are shown in , respectively.

[0039] Table 1

[0040]

[0041] As can be seen from the data in the table, the size and location of the injector has an effect on creating negative pressure or suction to move EGR gases into the intake airflo...

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PUM

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Abstract

An exhaust gas recirculation ejector system for an engine that includes an air conduit coupled to an engine providing charge air to the engine. The air conduit includes at least one bend formed therein. The at least one bend includes a port formed therein. An EGR conduit is coupled to an exhaust manifold of the engine at a first end of the EGR conduit. A second end of the EGR conduit passes through the port and extends into the air conduit at the bend defining an ejector mixing the charge air and exhaust gas before entry into the engine.

Description

technical field [0001] The present invention relates to exhaust gas recirculation (EGR) injectors and EGR systems. Background technique [0002] Many previously known automotive vehicles utilize internal combustion engines, such as diesel, gasoline or two-stroke engines, to propel the vehicle. In some configurations, EGR (exhaust gas recirculation) recirculates exhaust gas into the engine to mix with cylinder intake air. EGR mixed with air and fuel reaching the engine enhances the overall combustion of the fuel. This in turn reduces exhaust emissions. [0003] Various prior art systems may use an EGR valve and a standard venturi to measure EGR to the intake manifold. However, such systems often operate at undesired pressures and result in fuel economy losses. Accordingly, there is a need in the art for an improved EGR system that operates under a variety of engine operating conditions. Contents of the invention [0004] In one aspect, an exhaust gas recirculation inje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M26/12F02M26/19F02M35/10B01F5/04
CPCF02M26/19F02M26/12F02M35/10144F02M26/02F02M35/10222F02M35/10091B01F2215/0431B01F23/10B01F25/31241B01F25/31252B01F25/4331F02M26/04F02M26/14
Inventor 詹姆斯·麦卡锡阿西姆·德赛萨加尔·查万
Owner EATON INTELLIGENT POWER LTD