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Air-assisted urea supply device used for diesel engine

A technology of air-assisted and supplying devices, which is applied in the direction of exhaust devices, noise reduction devices, mechanical equipment, etc., can solve problems such as blocking the mixing chamber, and achieve the effect of highlighting substantive features

Inactive Publication Date: 2014-07-02
SINO TRUK JINAN POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of scheme is easy to cause urea crystallization in the mixing chamber and block the mixing chamber

Method used

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  • Air-assisted urea supply device used for diesel engine
  • Air-assisted urea supply device used for diesel engine

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Embodiment Construction

[0022] In order to clearly illustrate the technical features of the solution, the solution will be described below through a specific implementation mode combined with the accompanying drawings.

[0023] It can be seen from the accompanying drawings that an air-assisted urea supply device for diesel engines in this scheme includes a urea storage tank 16, an engine air storage tank 17, an engine exhaust muffler 18 (containing an SCR catalyst), and the urea storage tank 16 passes through the urea pump. 4 is connected with the injector 7, and the urea pump 4 is an electromagnetic plunger pump. The injector 7 communicates with the engine exhaust muffler 18, a filter 5 is arranged between the urea storage tank 16 and the urea pump 4, an electric heater 10 is arranged on the pipeline between the urea pump 4 and the injector 7, and The output end of the urea pump 4 is also provided with an accumulator 6, the engine air reservoir 17 communicates with the injector 7 through the air fil...

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Abstract

The invention provides an air-assisted urea supply device used for a diesel engine. The air-assisted urea supply device used for the diesel engine comprises a urea storage box, an engine air storage cylinder and an engine exhaust silencer. The urea storage box is connected with an ejector through a urea pump, the ejector is communicated with the engine exhaust silencer, a filter is arranged between the urea storage box and the urea pump, an energy accumulator is further arranged at the output end of the urea pump, the engine air storage cylinder is communicated with the ejector through an air filter, a pressure reducing and stabilizing valve is further arranged between the air filter and the ejector, and the output end of the pressure reducing and stabilizing valve is further communicated with the input end of the urea pump. According to the scheme, the ejector of the device is simple in structure, good in the ejection effect and high in the accuracy and stability, urea crystals will not be generated in the ejecting process, and stable ejection can be achieved.

Description

technical field [0001] The invention relates to an integrated SCR air-assisted urea supply device for diesel engines. Background technique [0002] At present, air pollution is becoming more and more serious, and automobiles, especially those powered by diesel engines, are an important source of pollution. The main pollutants of diesel engines are nitrogen oxides, NOx, and particulate matter. In order to suppress the generation of particulate matter, internal purification is generally used, that is, to increase the combustion temperature and pressure, but this working condition will greatly increase the generation of NOx. In order to reduce NOx emissions, the main technical route used by the automotive industry is selective catalytic reduction. (SCR), by spraying urea solution into the exhaust gas, the NOx in the exhaust gas is reduced to harmless nitrogen, carbon dioxide and water. With the development of the automobile industry, the demand for SCR systems is also increasi...

Claims

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Application Information

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IPC IPC(8): F01N3/28
Inventor 郭庆波刘海涛王柯高发廷王秋花刘浩黄少文
Owner SINO TRUK JINAN POWER
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