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Device and method for regulating the injection of a quantity of reducer in the gaseous phase

A technology of reducing agent and jet gas, which is applied in the field of quantity devices, can solve the problems of vehicle weight and so on

Inactive Publication Date: 2012-07-18
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of storing and using liquid urea or urea-water solutions is the need for large containers which add extra weight to the vehicle

Method used

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  • Device and method for regulating the injection of a quantity of reducer in the gaseous phase
  • Device and method for regulating the injection of a quantity of reducer in the gaseous phase
  • Device and method for regulating the injection of a quantity of reducer in the gaseous phase

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Embodiment Construction

[0023] The invention relates to a device and a method for adjusting the amount of injected gas-phase reducing agent. The apparatus includes a reductant supply line and a pressure regulator located in the line. The apparatus also includes a sensing instrument for sensing pressure downstream of the regulator and a pressure controlled reductant injector. The apparatus also includes a processor that controls the injector as a function of the measured pressure. The processor allows precise control of the reductant gas flow. Also this structure controls the flow with a reduced number of parts, which reduces assembly costs.

[0024] figure 1 A vehicle 10 is shown which includes a line 12 for exhaust gas aftertreatment. Vehicle 10 includes an engine 14 , such as a diesel engine, to which line 12 is connected. Line 12 can comprise different exhaust gas treatment points. For example, the line 12 can include a denitrification point 15 . DeNO x The denitrification site 15 includes...

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Abstract

The invention relates to a device (16) for regulating the injection of a quantity of reducer in the gaseous phase, comprising: a reducer supply channel (18), a pressure regulator (20) for regulating the pressure in the channel, members (24) for detecting the pressure downstream of the regulator (20), a reducer injector (22), and a computer controlling the injector according to the measured pressure.

Description

technical field [0001] This application claims priority from French application 0956182 filed September 10, 2009, the content of which (text, drawings and claims) is hereby incorporated by reference. [0002] The invention relates to a device for adjusting the amount of injected gas-phase reducing agent. The present invention also proposes a method of carrying out this invention. Background technique [0003] Nitrogen oxides (NO x ) has been linked to health problems among people and is a key ingredient in the formation of "smog" (pollution clouds) in cities. Laws set increasingly stringent standards for reducing them and / or eliminating them from motor vehicles or stationary sources. To this end, a proven technical solution is by adding, for example, NH 3 The reducing agent (ammonia) performs specific selective catalytic reduction (SCR) to chemically reduce nitrogen oxides. This technical solution enables diesel engines to meet increasingly stringent emission standards....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20
CPCF01N3/2066F01N2610/1453Y02T10/24F01N2610/04F01N2610/11F01N2610/02Y02T10/12
Inventor C·沙里亚尔
Owner PEZHO SITROEN AUTOMOBILS SA