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
US20120186231A1Inactive Publication Date: 2012-07-26VOLVO LASTVAGNAR AB
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
VOLVO LASTVAGNAR AB
Publication Date
2012-07-26
Estimated Expiration
Not applicable · inactive patent

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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.
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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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