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Diesel engine tail gas pretreatment device

A diesel engine and exhaust gas technology, which is applied in the direction of exhaust devices, noise reduction devices, mechanical equipment, etc., can solve the problems of high cost, large volume, and inability to reduce CO, HC and NOx emissions, and achieve good performance results

Inactive Publication Date: 2005-08-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the particulate filter commonly used in diesel engines has some disadvantages in this exhaust after-treatment device: the particulate filter must be electrically heated every once in a while to burn the carbon particles adsorbed on the particulate filter. Consumes a part of energy; the products after combustion are discharged directly without any useful work; if no other catalysts or devices are added, only soot can be filtered, and CO, HC and NOx emissions cannot be reduced; the volume is large and the cost is high

Method used

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  • Diesel engine tail gas pretreatment device
  • Diesel engine tail gas pretreatment device
  • Diesel engine tail gas pretreatment device

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Embodiment Construction

[0013] in figure 1 , 2 In the embodiment shown in 3, the main combustion chamber of the engine is composed of the cylinder head 1, the piston 8 and the cylinder liner 9. The cylinder head 1 is equipped with two intake valves 2, two exhaust valves 4 and a fuel injection Device 3 and exhaust valve 4 can only be opened upwards. A filter 6 is provided below the exhaust valve 4, figure 2 Indicates a split filter 6. image 3 Indicates the integral filter 6. A porous protective layer 5 is placed on the upper and lower parts of the filter 6, and the filter 6 and the porous protective layer 5 are fixed in the cylinder head 1 with a middle hole cover plate 7. The above-mentioned filter 6 can be made of honeycomb ceramics, foamed ceramics or porous materials sintered with metal powder; the porous protective layer 5 can be made of heat-resistant stainless steel plates or nets. Generally, multiple layers can be used together to improve the crushing of the filter element. The protection of cr...

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Abstract

The present invention relates to a pretreatment device of diesel engine tail gas, belonging to the field of itnernal combustion engine combustion and tail gas treatment technology. It is characterized by that an exhaust filter element is placed in the cylinder capwith can be opened upward and is positioned under the exhaust valve, and its ga is formed into a portion of combustion chamber. Said exhaust filter element can be made up by using porous ceramics, heat-resistant stainless steel wire or metal powder sintered porous material, it not only can ensure good performance of engine, but also can greatly reduce discharge of carbon smoke, NOx, Co and HC.

Description

Technical field [0001] A diesel engine tail gas pretreatment device belongs to the field of internal combustion engine combustion and tail gas treatment. Background technique [0002] The soot emission of diesel engines is one of the main parts of environmental pollution. As the mixed gas of traditional diesel engine is qualitatively adjusted, the diesel engine is prone to produce soot emissions under high working conditions. At present, the particulate filter commonly used in diesel engines has some shortcomings: the particulate filter must be electrically heated every once in a while to burn the carbon particles adsorbed on the particulate filter. It consumes a part of energy; the products after combustion are directly discharged without doing any useful work; without other catalysts or devices, it can only filter soot and cannot reduce CO, HC and NOx emissions; it is larger in size and higher in cost. In order to solve the various shortcomings of the above-mentioned diesel eng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/023
Inventor 隆武强田江平冯立岩杜宝国魏胜利付磊
Owner DALIAN UNIV OF TECH