Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for feeding reducing agent into an exhaust gas system and corresponding exhaust gas system

An exhaust system and reducing agent technology, applied in separation methods, exhaust devices, exhaust treatment and other directions, can solve problems such as low exhaust gas temperature

Active Publication Date: 2014-01-15
VTESCO TECH GMBH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the conversion of urea to ammonia, the problem is that the exhaust gas temperatures of internal combustion engines, especially those operating with lambda values ​​greater than 1 and thus with high NOx emissions, are particularly low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for feeding reducing agent into an exhaust gas system and corresponding exhaust gas system
  • Method for feeding reducing agent into an exhaust gas system and corresponding exhaust gas system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] figure 1 The motor vehicle 2 shown in has an internal combustion engine 14 with an exhaust system 19 according to the invention. The exhaust system 19 comprises an exhaust line 6 which extends away from the internal combustion engine 14 . The exhaust gas flow 11 flows out of the internal combustion engine 14 through the exhaust line 6 . In this case, the exhaust gas flow 11 first passes through the catalytic converter 7 along the exhaust gas line 6 . The catalytic converter 7 is already provided for converting pollutants in the exhaust gas flow 11 . The exhaust gas flow 11 then passes through a first feed 8 for a gaseous reducing agent and then through a second feed 9 for a liquid reducing agent. The second supply device 9 is provided with spray nozzles 22 which can finely atomize the liquid reducing agent. However, the sequence can also vary. Along the exhaust gas line 6 there is then a sensor 23 by means of which the exhaust gas parameters are observed. Arranged...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for feeding reducing agent or reducing agent precursor into exhaust systems of mobile internal combustion engines and an exhaust system are preferably used for internal combustion engines with high nitrogen oxide compound emissions. A feed time is established. An exhaust parameter and / or necessary quantity of reducing agent is determined and a feed state of the reducing agent is defined. The reducing agent is treated if the feed state does not correspond to a stored state. The reducing agent feed to the exhaust system takes place last. The steps are repeated multiple times. This permits reducing agent to be fed into an exhaust system in a state suitable for the exhaust temperature, so that complete conversion of reducing agent takes place and selectively catalytic reduction is also ensured. This reduces the quantity of electrical energy necessary for converting reducing agent. A motor vehicle having the system is also provided.

Description

technical field [0001] The invention relates to a method and a device for introducing (supplying) a reducing agent or a reducing agent precursor into an exhaust system of a mobile internal combustion engine. The reducing agent feed method and device are preferably used in exhaust systems of mobile internal combustion engines with high nitrogen oxide emissions. Background technique [0002] Exhaust gases from internal combustion engines often contain substances which are undesirable to be emitted into the environment. In particular carbon particles or carbon black particles, carbon monoxide and / or nitrogen oxides may be mentioned here. Many countries have established limit values ​​for these substances, up to which the substances are permitted to be contained in the exhaust gases of internal combustion engines. There are different measures to reduce the emission of said emission species. [0003] The ratio of the quantities of oxygen and fuel fed to the internal combustion...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/20
CPCF01N2900/1602F01N2900/14F01N2240/40Y02T10/24F01N2610/10F01N3/208F01N2900/1812F01N2900/1402F01N2900/1622F01N2610/14B01D53/9495F01N2610/02Y02A50/20Y02T10/12F01N3/20F01N3/28B01D53/94
Inventor W·毛斯R·布吕科
Owner VTESCO TECH GMBH