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Method of controlling ammonia amount adsorbed in selective catalytic reduction catalyst and exhaust system using the same

Inactive Publication Date: 2015-06-25
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about controlling the amount of ammonia in a selective catalytic reduction (SCR) catalyst and an exhaust system using it. The method helps improve the performance of the SCR catalyst by adsorbing more ammonia while preventing it from slipping. This results in a smaller SCR catalyst volume.

Problems solved by technology

If the ammonia is slipped from the SCR catalyst, the slipped ammonia may cause stink and customers may have complaints.
Therefore, the SCR catalyst may underperform.

Method used

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  • Method of controlling ammonia amount adsorbed in selective catalytic reduction catalyst and exhaust system using the same
  • Method of controlling ammonia amount adsorbed in selective catalytic reduction catalyst and exhaust system using the same
  • Method of controlling ammonia amount adsorbed in selective catalytic reduction catalyst and exhaust system using the same

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Embodiment Construction

[0039]Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is / are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

[0040]An exemplary embodiment of the present invention will hereinafter be described in detail with reference to the accompanying drawings.

[0041]FIG. 1 is a schematic diagram of an exhaust system according to an exemplary embodiment of the present invention.

[0042]As shown in FIG. 1, nitrogen oxide in exhaust gas is removed while t...

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Abstract

A method of controlling ammonia amount adsorbed in a selective catalytic reduction (SCR) catalyst, may include detecting current temperature of the SCR catalyst, reading predicted maximum temperature of the SCR catalyst after a predetermined time based on the current temperature of the SCR catalyst, determining a target adsorption amount of ammonia (NH3) based on the predicted maximum temperature of the SCR catalyst, and controlling amount of urea or the NH3 injected into exhaust gas based on the target adsorption amount of the NH3 and current adsorption amount of the NH3.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims priority to and the benefit of Korean Patent Application No. 10-2013-0161441 filed on Dec. 23, 2013, the entire contents of which is incorporated herein for all purposes by this reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a method of controlling ammonia amount adsorbed in a selective catalytic reduction catalyst and an exhaust system using the same. More particularly, the present invention relates to a method of controlling ammonia amount adsorbed in a selective catalytic reduction (SCR) catalyst and an exhaust system using the same that improves performance of the SCR catalyst by adsorbing more ammonia (NH3) in the SCR catalyst while preventing slip of the NH3 from the SCR catalyst.[0004]2. Description of Related Art[0005]Generally, exhaust gas flowing out from an engine through an exhaust manifold is urged into a catalytic converter mounted at a...

Claims

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Application Information

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IPC IPC(8): F01N3/20
CPCF01N3/2066F01N3/208F01N11/002F01N2610/02F01N2900/1614Y02A50/20Y02T10/12Y02T10/40F01N3/18F01N3/20
Inventor CHO, JI HO
Owner HYUNDAI MOTOR CO LTD