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Exhaust gas after treatment system with temperature control

a treatment system and exhaust gas technology, applied in the direction of engines, mechanical equipment, machines/engines, etc., can solve the problems of complex control of nox emissions from such engines, ineffective or less effective scr, and the temperature of the exhaust gas may be quite low

Inactive Publication Date: 2012-07-26
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]Further advantages of the present invention and embodiments thereof will appear from the following detailed description of the invention.

Problems solved by technology

However, control of NOx emissions from such engines is complicated, i.a. due to the high content of oxygen in the exhaust gas.
If the temperature is too low then the SCR will be ineffective or less effective.
On the other hand, the temperature of the exhaust gas may be quite low under idle conditions and / or under conditions of low load and / or at low speeds and / or at a cold start.

Method used

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  • Exhaust gas after treatment system with temperature control
  • Exhaust gas after treatment system with temperature control
  • Exhaust gas after treatment system with temperature control

Examples

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Embodiment Construction

[0024]FIG. 1 is a schematic illustration of an emission control system 100 configured to receive exhaust gas from a combustion engine 110 according to an embodiment of the present solution. The emission control system 100 comprises an EATS 120 configured to operatively clean the exhaust gas received from the engine 110. The EATS 120 is provided with a burner unit 130 configured to operatively heat the received exhaust gas to a predetermined temperature before the gas is provided to the EATS 120, and a pump unit 140 configured to operatively provide the burner unit 130 with air to be used by the burner unit 130 in a heating process therein. The pump unit 140 is generally configured to be operatively propelled by exhaust gas. The burner unit 130 is arranged upstream the pump unit 140 such that the exhaust gas from the burner unit 130 is operatively provided to the pump unit 140 for propelling the pump unit 140.

[0025]The use of a separate burner unit 130 for heating exhaust gas from th...

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Abstract

A vehicle emission control system is configured to operatively receive exhaust gas from a combustion engine and includes an exhaust gas after treatment system (EATS) configured to operatively clean the received exhaust gas, a burner unit configured to operatively heat the received exhaust gas to a predetermined temperature before the exhaust gas is provided to the EATS, and a pump unit configured to operatively provide the burner unit with air to be used by the burner unit in a heating process. The pump unit is configured to be operatively propelled by exhaust gas, and the burner unit is arranged upstream the pump unit such that exhaust gas from the burner unit is operatively provided to the pump unit for propelling the pump unit.

Description

BACKGROUND AND SUMMARY[0001]The present invention relates to an arrangement and a method for controlling the temperature of the exhaust gas from a combustion engine before the exhaust gas is provided to an exhaust gas after treatment system for cleaning.[0002]Current emission control regulations for automotive vehicles will normally require the use of an Exhaust gas After Treatment System (EATS) comprising various emission cleaning units. Thus, most modern automotive vehicles, at least heavy vehicles, use an EATS to clean the exhaust gas from the vehicle engine. The emission cleaning units of the EATS may e.g. be various catalysts which may convert carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx) produced during the operation of the vehicle engine. Other emission cleaning units may be various filters, e.g. particle filters designed to remove particular matter or soot or similar from the exhaust gas etc.[0003]Vehicles equipped with a diesel engine offer the benefit ...

Claims

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Application Information

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IPC IPC(8): F01N13/08
CPCF01N3/2033F01N3/32F01N3/36F01N3/2006Y02T10/16Y02T10/26F01N5/04F01N2240/14F01N2270/04Y02T10/12Y02A50/20
Inventor LINDBLOM, JANSJOHOLM, MARTINSUNDIN, LARS
Owner VOLVO LASTVAGNAR AB
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