Air-cooled exhaust gas heat exchanger, in particular exhaust gas cooler for motor vehicles

A technology of heat exchanger and exhaust gas heat, which is applied in the direction of heat exchanger type, indirect heat exchanger, lighting and heating equipment, etc., and can solve cooling problems and other problems

Inactive Publication Date: 2009-12-23
BEHR GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This known liquid-cooled exhaust gas cooler is very efficient, but has the following disadvantage: the cooling of the exhaust gas depends on the temperature of the coolant, which has a temperature of 80 to 100 °C

Method used

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  • Air-cooled exhaust gas heat exchanger, in particular exhaust gas cooler for motor vehicles
  • Air-cooled exhaust gas heat exchanger, in particular exhaust gas cooler for motor vehicles
  • Air-cooled exhaust gas heat exchanger, in particular exhaust gas cooler for motor vehicles

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Embodiment Construction

[0039] Fig. 1 is an exploded view of the exhaust gas cooler 1 of the present invention, that is, the parts or components are exploded. The exhaust gas cooler 1 is used to cool exhaust gas for an exhaust gas recirculation system of an automobile internal combustion engine, which will be described in detail in FIG. 4 below. The exhaust gas cooler 1 of the present invention has a fin-shaped core 2 composed of flat tubes 3 and corrugated fins 4 arranged between the flat tubes. The corrugated fin 4 is brazed or welded to the flat tube to form a compact core 2. The corrugated fins 4 are permeated by the surrounding air and have scales (not shown) for enhancing heat exchange with the air. These scales are the same as those on the corrugated fins of the known coolant radiator. The corrugated fin 4 can be replaced by a so-called Stegrippen, which is also not shown, which is a curved fin with staggered flanges. Generally speaking, the heat exchange efficiency of plate fins is low. The pipe ...

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Abstract

The invention relates to an air-cooled exhaust gas heat exchanger, comprising an exhaust gas cooler for motor vehicles, having ducts or exhaust ducts through which the exhaust gas of an internal combustion engine can flow, between which fins are arranged for air cooling, according to the invention This consists in that the exhaust gas line is formed in the form of a tube, in particular a flat tube (3), which together with the fins (4) form the tube-fin core (2), and the tube (3) has tube ends (3a), which are fastened to In the collecting box (5) of exhaust gas.

Description

Technical field [0001] The invention relates to an air-cooled exhaust gas heat exchanger, especially an automobile exhaust gas cooler, and the arrangement of an exhaust gas recirculation system. Background technique [0002] In today's automobiles, especially commercial vehicles, exhaust gas coolers are used in the exhaust gas recirculation system (AGR system) to cool the recirculated exhaust gas. According to the law, the exhaust gas recirculation system is used to reduce the fuel consumption of internal combustion engines and reduce harmful substances (especially NO X ). Exhaust gas coolers currently installed in automobiles are cooled by coolant, which comes from the cooling circuit of the internal combustion engine. This known liquid-cooled exhaust gas cooler is very efficient, but has the following disadvantages: the cooling of the exhaust gas depends on the temperature of the coolant, which is 80 to 100°C. This only works if the exhaust gas outlet temperature behind the exh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D1/053
CPCY02T10/146Y02T10/121
Inventor 约尔格·迪格尔彼得·格斯克斯克劳斯·伊姆勒弗兰克·冯吕茨奥
Owner BEHR GMBH & CO KG
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