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Control method and device for engine nitrogen oxide emission

A technology of nitrogen oxides and control methods, applied in engine control, combustion engines, machines/engines, etc., can solve problems such as urea injection offset, high nitrogen oxide emissions, engine aging, etc., and solve the drift of nitrogen oxide sensors Effect

Pending Publication Date: 2022-08-09
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the operation of the engine, the nitrogen oxide (NOx) sensor drift of the engine, urea injection deviation or engine aging often occur, which may easily cause the problem of excessively high or low nitrogen oxide emissions

Method used

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  • Control method and device for engine nitrogen oxide emission
  • Control method and device for engine nitrogen oxide emission
  • Control method and device for engine nitrogen oxide emission

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Embodiment Construction

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] In this application, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also no Other elements expressly listed, or which are also inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the ph...

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Abstract

The invention provides a control method and device for nitrogen oxide emission of an engine, and the method comprises the steps: obtaining state parameters of the engine when the operation state of the engine meets a preset control condition; according to the state parameters, the window specific emission amount of nitric oxide in the tail emission of the engine is calculated; the tail exhaust of the engine refers to post-treated emission substances of the engine; under the condition that the window specific emission amount is not in a preset specific emission amount interval, parameter quantity of control parameters of the engine in a work base window to which the window specific emission amount belongs is obtained; according to the parameter quantity in the power-based window and a preset fixed adjustment factor, calculating the parameter quantity of the control parameter in the next power-based window of the power-based window; and controlling the emission of nitrogen oxides of the engine according to the parameter quantity in the next work base window. By applying the method provided by the invention, the emission of nitrogen oxides can be reasonably controlled.

Description

technical field [0001] The invention relates to the technical field of exhaust gas after-treatment of internal combustion engines, in particular to a method and device for controlling nitrogen oxide emission of an engine. Background technique [0002] During the operation of the engine, the drift of the nitrogen oxide (NOx) sensor of the engine, the deviation of urea injection or the aging of the engine often occur, which may easily cause the problem of excessively high or low nitrogen oxide emissions. SUMMARY OF THE INVENTION [0003] The technical problem to be solved by the present invention is to provide a method for controlling the emission of nitrogen oxides from an engine, which can reasonably control the emission of nitrogen oxides. [0004] The present invention also provides a control device for engine nitrogen oxide emission, so as to ensure the realization and application of the above method in practice. [0005] A method for controlling nitrogen oxide emissio...

Claims

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Application Information

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IPC IPC(8): F02D41/14
CPCF02D41/1462F02D2250/36Y02T10/40
Inventor 杨新达张竞菲谭治学王国栋张忠祥李俊琦
Owner WEICHAI POWER CO LTD
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