Control method, device and system of post processing efficiency

A control method and control device technology, applied in the field of control, can solve problems such as excessive engine fuel consumption, white smoke, poor thermal management efficiency, etc.

Active Publication Date: 2019-03-19
WEICHAI POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the inventors have found that under conditions such as engine cold start or long-time idling, the aftertreatment internal carrier temperature is low and the catalyst activity is low
When these working conditions transition to the normal driving condition of the engine, the a...

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  • Control method, device and system of post processing efficiency
  • Control method, device and system of post processing efficiency
  • Control method, device and system of post processing efficiency

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0040] The inventors found that under conditions such as cold start of the engine or long-time idling, the temperature of the internal carrier of the aftertreatment is low, and the activity of the catalyst is low. When these working conditions transition to the normal driving conditions of the engine, the activity of the catalyst will have a long activation process, resulting in increased engine emissions and the problem of "white smoke" during the regeneration process. In addition,...

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Abstract

The invention provides a control method, device and system of post processing efficiency. The control method of post processing efficiency is applied to the system of post processing efficiency, wherein the system comprises a DOC module, a DPF module and a SCR module, and the DOC module, the DPF module and the SCR module are connected through a gas exhaust piping. An electronic control deflation valve supercharger is arranged between the DOC module and a turbine. The control method comprises the steps that the electronic control deflation valve supercharger is controlled to turn on based on aregeneration request of the DPF module, an engine state and an upper temperature of the SCR module, and thus front exhaust of the turbine is made to enter the gas exhaust piping through a branch of the electronic control deflation valve supercharger. The front exhaust of the turbine is made to enter the gas exhaust piping, thus air inlet temperature is increased, the activity of catalysts can be accelerated by increasing the temperature, the post processing efficiency is further improved, the amount of crystallized urea in the post processing is reduced, and the problem of white smoke in the reactivation process is solved fundamentally.

Description

technical field [0001] The present application relates to the field of control, in particular to a method, device and system for controlling post-processing efficiency. Background technique [0002] At present, based on emission requirements, it is necessary to install after-treatment equipment on the engine, and convert the emissions generated by the engine through the carrier catalyst inside the after-treatment equipment. [0003] However, the inventors found that under conditions such as cold start of the engine or long-time idling, the temperature of the internal carrier of the aftertreatment is low, and the activity of the catalyst is low. When these working conditions transition to the normal driving conditions of the engine, the activity of the catalyst will have a long activation process, resulting in increased engine emissions and the problem of "white smoke" during the regeneration process. In addition, the thermal management efficiency in the current aftertreatme...

Claims

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Application Information

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IPC IPC(8): F01N9/00F01N3/20F02B37/18
CPCF01N3/2066F01N9/00F01N9/002F01N2610/1486F01N2900/08F01N2900/1404F02B37/183Y02T10/12Y02T10/40
Inventor 褚国良冯海浩王意宝
Owner WEICHAI POWER CO LTD
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