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Internal combustion engine exhaust line

A technology of internal combustion engines and circuits, which is applied to exhaust devices, mechanical equipment, engine components, etc., and can solve problems such as problems with small vehicles with short pipelines

Active Publication Date: 2013-09-18
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The second disadvantage is that nitrogen oxides (NO X ) The reduction must have the temperature of the exhaust gas higher than the critical temperature for reduction
This is problematic for small vehicles with short pipelines

Method used

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  • Internal combustion engine exhaust line

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Embodiment Construction

[0049] In the following description, features and functions already known to those skilled in the art are not described in detail.

[0050] figure 1 A vehicle 2 such as a motor vehicle is shown. For example, the vehicle 2 is a car. The vehicle 2 is equipped with a power plant 4 . The power plant 4 includes an internal combustion engine 6 and an exhaust gas line 8 .

[0051] The engine 6 can drive the drive wheels 10 of the vehicle 2 to rotate. Here, the engine 6 is a diesel engine. During its operation, the engine 6 emits exhaust gases which are received by an exhaust line 8 capable of handling these gases before being expelled outside the vehicle 2 .

[0052] The exhaust line 8 comprises a line 12 which receives the exhaust gases of the engine 6 through an opening 13 of the exhaust collector. For example, the conduit 12 is a cylindrical tube of circular cross-section. Here, the line 12 is made of steel.

[0053]The exhaust line 8 comprises a particulate filter 14 (als...

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Abstract

The invention relates to an exhaust line (8) of an internal combustion engine (6). The exhaust line comprises: a pipe (12) receiving exhaust gases, and a particulate filter (14) impregnated with a first catalytic coating forming a reduction catalyst for nitrogen oxides (NOx), and with a second catalytic coating forming a first oxidation catalyst for carbon monoxide (CO) and hydrocarbons (HC), and is characterized in that: the line (8) comprises an additional filter (30), housed in the pipe (12) downstream of the particulate filter (14) and impregnated with a catalytic coating forming a second reduction catalyst for nitrogen oxides (NOx), and the additional filter (30) has an internal structure such that the additional filter (30) creates a pressure drop which is less than the pressure drop created by the same volume of particulate filter (14) impregnated with the same quantity of the same catalytic coating.

Description

technical field [0001] The invention relates to an exhaust line for an internal combustion engine. The invention also relates to an engine block comprising said exhaust line. The invention finally relates to a vehicle equipped with such an engine unit. Background technique [0002] Exhaust gas emitted from internal combustion engines contains polluting elements, and it is desired to reduce the emission of the exhaust gas into the atmosphere. "Pollution element" refers more specifically to: Nitrogen oxides NO X (N 2 O, NO and NO 2 ), carbon monoxide (CO), unburned hydrocarbons (HC), and soot particles. In order to limit the emission of polluting elements, it is known to effect aftertreatment of the gases passing through the exhaust gas line of the internal combustion engine. Typically, the exhaust line of the internal combustion engine includes: [0003] - lines receiving engine exhaust gases, [0004] - a particulate filter that allows the retention and combustion of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/035F01N13/02
CPCF01N3/035F01N3/103F01N3/2066F01N13/02F01N2510/06Y02A50/20F01N3/08
Inventor G·克里恩
Owner PEZHO SITROEN AUTOMOBILS SA
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