Internal combustion engine exhaust gas recirculation cooler

A technology of exhaust gas recirculation and cooler, applied in the direction of exhaust gas recirculation, machines/engines, mechanical equipment, etc., can solve the problems of low efficiency of shell-and-tube coolers, shorten the heat transfer distance, intensify the degree of turbulence, and improve the exchange rate. The effect of thermal efficiency

Inactive Publication Date: 2014-04-23
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a shell-and-tube cooler with higher heat exchange efficiency for the problem of low efficiency of the existing shell-and-tube cooler

Method used

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  • Internal combustion engine exhaust gas recirculation cooler
  • Internal combustion engine exhaust gas recirculation cooler
  • Internal combustion engine exhaust gas recirculation cooler

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Embodiment Construction

[0016] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0017] as attached figure 1 As shown, the cooler for exhaust gas recirculation of an internal combustion engine includes a shell 1, a heat exchange tube 2, a tube sheet 3, and a fluid inlet and outlet 4. During operation, the exhaust gas enters from one end, passes through the heat exchange tube, and flows out from the other end; cooling The medium enters from the side, flows outside the heat exchange tube wall, and flows out from the other side; the two exchange heat on the tube wall of the heat exchange tube, and the exhaust gas is cooled for recirculation, reducing the emission of nitrogen oxides index.

[0018] See attached figure 2 And attached image 3 , the solution of the present invention is characteriz...

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Abstract

The invention relates to an internal combustion engine exhaust gas recirculation cooler. The internal combustion engine exhaust gas recirculation cooler comprises a housing, heat exchange pipes, pipe plates and a fluid inlet-outlet and is characterized in that threads are processed outside the heat exchange pipes. The threads are processed outside the heat exchange pipes, so that turbulent flows formed by a cooling medium outside the pipes are intensified, a heat transfer distance between exhaust gas and the cooling medium at the thread bottom is shortened, the heat exchange efficiency is improved, and the internal combustion engine exhaust gas recirculation cooler is simple, convenient, easy to operate and obvious in effect.

Description

technical field [0001] The invention relates to a cooler for exhaust gas recirculation of internal combustion engines, belonging to the technical field of exhaust gas recirculation of internal combustion engines. Background technique [0002] Exhaust gas recirculation technology is an effective way to reduce nitrogen oxide emissions. High-temperature oxygen-enriched environment is the main environment for the generation of nitrogen oxides. Exhaust gas recirculation technology can effectively reduce the oxygen concentration in the intake air and the maximum combustion temperature in the cylinder, and inhibit the formation of nitrogen oxides. The use of cooled exhaust gas recirculation has a positive impact on nitrogen oxides, particulate matter emissions and fuel consumption. [0003] The object to be cooled by the exhaust gas recirculation cooler is the recirculated high-temperature exhaust gas, which requires the exhaust gas recirculation cooler to use the smallest possibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/07F02M26/29
Inventor 张洪涛汪振环
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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