Waste gas high-efficiency cooling system with high EGR efficiency

A cooling system, EGR valve technology, applied in the charging system, exhaust gas recirculation, adding non-fuel substances to the fuel, etc., can solve the thermal deformation and thermal stress of the cooler, affect the service life of the cooler, and cannot be convenient for cars, etc. problems, to achieve the effect of improving efficiency, improving durability and saving space

Inactive Publication Date: 2009-09-09
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If a cooler is used, the size of the cooler involved in meeting the requirements will be very large, and it is bound to not be conveniently installed in the car; and the thermal deformation and thermal stress of the cooler will be very large, which will seriously affect the use of the cooler life

Method used

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  • Waste gas high-efficiency cooling system with high EGR efficiency
  • Waste gas high-efficiency cooling system with high EGR efficiency
  • Waste gas high-efficiency cooling system with high EGR efficiency

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Embodiment Construction

[0018] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

[0019] A high-efficiency exhaust gas cooling system with high EGR rate includes a cooler connected with an EGR pipe and an EGR valve. The innovation of the cooling system is that it includes a pre-cooler 1 and a post-cooler 7, and the EGR valve 6 is installed in series between the pre-cooler and the post-cooler. The pre-cooler cools the high-temperature and high-flow exhaust gas introduced from the exhaust end, and the rear cooler cools the cooled exhaust gas coming out of the pre-cooler. The ultimate goal of these two coolers is to control the exhaust gas within a reasonable temperature ( 150-200°C). The EGR valve controls the amount of exhaust gas introduced into the cooling system, and precisely adjusts the exhaust gas according to the r...

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Abstract

The invention relates to a waste gas high-efficiency cooling system with high EGR efficiency, which comprises a cooler and an EGR valve and has the innovative points: the system includes a precooler, an aftercooler and an EGR valve; wherein, the precooler is used for cooling high temperature large flow rate waste gas introduced from an exhaust system; the aftercooler is used for cooling the circulated waste gas which is introduced from the precooler and cooled by the precooler; and the EGR valve is connected and installed between the precooler and the aftercooler in series, and used for adjusting the flow rate of the waste gas. The invention is scientific and reasonable in design, and is especially used for high EGR efficiency (70-80%) waste gas cooling in an oxy-fuel combustion engine based on waste gas recycling. The waste gas high-efficiency cooling system has the advantages of high cooling efficiency, small occupying space, convenient installation, high durability, etc.

Description

technical field [0001] The invention belongs to the technical field of EGR exhaust gas cooling, in particular to an exhaust gas high-efficiency cooling system based on exhaust gas recirculation in an all-oxygen combustion engine with high EGR rate. Background technique [0002] At present, in order to reduce the nitrogen oxides NO in engine exhaust x content, has begun to use exhaust gas recirculation (EGR) technology. In the EGR system, part of the exhaust gas is extracted from the exhaust system, and then it enters the intake system of the engine, and is mixed with fresh air or mixed gas into the engine cylinder for combustion, thereby reducing NO x content. Before the exhaust gas is mixed with air or mixed gas, it is necessary to cool the exhaust gas, which can not only reduce the intake air temperature, reduce the combustion temperature, and suppress NO x generation, but also reduces engine heat load, enhances engine durability, and prevents high-temperature exhaust g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/07F02M26/24
CPCF02M25/0732F02M25/0754F02M25/0738F02M25/0731Y02T10/121F02M26/47F02M26/24F02M26/28F02M26/33
Inventor 舒歌群韩睿梁兴雨卫海桥张韦张祚
Owner TIANJIN UNIV
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