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Method and system for designing diesel engine aftertreatment system

A technique for designing systems, diesel engines, applied in mechanical equipment, engine components, machines/engines, etc.

Active Publication Date: 2014-03-05
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] Although DOC+CDPF has a high particle capture efficiency, how to further reduce NO X Concentration is the main sticking point

Method used

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  • Method and system for designing diesel engine aftertreatment system
  • Method and system for designing diesel engine aftertreatment system

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Embodiment Construction

[0036] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0037] see Figure 1 to Figure 2 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of ​​the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arb...

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Abstract

The invention provides a method and a system for designing a diesel engine aftertreatment system. The method includes: recording NOX, THC, CO and PM discharge and BSFC (brake specific fuel consumption) values under different injection combinations of diesel engine working condition test, when a diesel engine does not have any aftertreatment systems, so as to determine optimal timing and rail pressure parameters and determining optimal injection parameters based of a first optimization rule; designing multiple DOC (diesel oxidation catalyst) + CDPF (coated diesel particulate filter) catalyst sample structures based on universal characteristics of extraction flow and discharge temperature to prepare the corresponding catalysts, mounting the prepared catalysts on the diesel engine, recording PM conversion rate, backpressure and cost of the corresponding catalysts, and determining relevant information of the optimal catalyst based on a second optimization rule so as to prepare the optimal catalyst; mounting the optimal catalyst on the diesel engine with an optimized fuel system, recording NOX conversion rate and urea leakage rate of SCR (selective catalytic reduction), and determining optimal urea leakage rate based on a third optimization rule to have the aftertreatment system designed.

Description

technical field [0001] The invention relates to a diesel engine aftertreatment system, in particular to a method and system for designing a diesel engine aftertreatment system. Background technique [0002] Diesel engines have the characteristics of high power and good economic performance. But the NO of the diesel engine X And particulate matter emissions are generally high, for this reason, various emission treatment systems have also emerged as the times require. [0003] For example, in the Chinese patent document with application number 200880120587.2, an emission treatment system is disclosed, which reduces nitrogen oxides, particulate matter and gaseous hydrocarbons, etc. [0004] For another example, in the Chinese patent document whose application number is 201110208045.4, a kind of exhaust gas post-treatment system is disclosed, which is provided with an exhaust pipeline on the exhaust gas passage of the engine exhaust, and a gasoline particulate filter is arran...

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Application Information

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IPC IPC(8): F01N3/18
Inventor 楼狄明姚笛胡志远谭丕强胡磬遥
Owner TONGJI UNIV
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