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Exhaust gas recovery device for a vehicle internal combustion engine and method for operating the exhaust gas recovery device

A technology of exhaust gas recovery and internal combustion engine, which is applied in the direction of internal combustion piston engine, exhaust gas recirculation, combustion engine, etc.

Active Publication Date: 2016-12-21
MAN TRUCK & BUS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The problem with exhaust gas recovery systems of this type, especially in combination with fuels with a high sulfur content, is that condensate can form in the air distributor line at low loads of the internal combustion engine

Method used

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  • Exhaust gas recovery device for a vehicle internal combustion engine and method for operating the exhaust gas recovery device
  • Exhaust gas recovery device for a vehicle internal combustion engine and method for operating the exhaust gas recovery device
  • Exhaust gas recovery device for a vehicle internal combustion engine and method for operating the exhaust gas recovery device

Examples

Experimental program
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Embodiment Construction

[0021] as from Figures 1 to 3 It can be seen that the first exhaust gas recovery line 4 , the second exhaust gas recovery line 7 configured as a bypass line for the exhaust gas cooler 5 face each other from the longitudinal direction x of the exhaust gas manifold 3 of the internal combustion engine 9 . Branches off in the first and second exhaust manifold end regions 10 , 11 arranged and proceeds from there along the opposite end face of the engine block 15 of the internal combustion engine 9 , here for example with six cylinder recesses 14 12 , 13 each lead to an air side 17 of internal combustion engine 9 opposite exhaust gas side 16 . As can further be seen from this figure, the first exhaust-gas recovery line 4 is shut off by means of the first shut-off valve 2 and the second exhaust-gas recovery line 7 , which is designed as a bypass line, is shut off by means of the second shut-off valve. Valve 6 can be closed. The two shut-off valves 2 , 6 are coupled by means of a c...

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PUM

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Abstract

The recirculation device (1) has a main exhaust gas return line (4) and an auxiliary main exhaust gas return line (7) that are separated by separate lines of exhaust gas side (16) of combustion engine. Exhaust gas manifold end regions (10,11) are arranged opposite to each other on exhaust gas manifold (3) along longitudinal direction. An air side portion (17) of combustion engine is connected to exhaust gas return line. The main exhaust gas return line and auxiliary main exhaust gas return line are arranged together in a mixing region (19). An independent claim is included for a method for operating exhaust gas recirculation device.

Description

technical field [0001] The invention relates to an exhaust gas recovery device for a vehicle internal combustion engine according to the preamble of claim 1 and a method for operating an exhaust gas recovery device according to the preamble of claim 11 . Background technique [0002] The problem with such exhaust gas recuperators, especially in combination with fuels with a high sulfur content, is that condensate can form in the air distributor line at low load levels of the internal combustion engine. This condensate can react with sulfur particles in the exhaust gas recovery system to form sulfuric acid and thus cause increased wear in the region of the cylinder recess of the cylinder head of the internal combustion engine. [0003] To avoid this, document US 6,367,256 B1 already discloses an exhaust gas recovery device in which a first exhaust gas recovery line branches off from the exhaust gas line, said first exhaust gas recovery line being recirculated to the air of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/50F02M26/25F02M26/33F02M26/41F02M26/47F02D41/00F02M26/17
CPCF02D41/0052F02M26/17F02M26/25F02M26/33F02M26/41F02M26/47F02M26/50Y02T10/40
Inventor H.菲舍尔S.芬克尔T.阿亨巴赫R.乌廷格J.霍尔韦克M.皮希勒
Owner MAN TRUCK & BUS AG