Device for cooling an exhaust gas stream

A technology of exhaust gas flow and exhaust pipe, which is applied in the direction of exhaust devices, silencers, gas passages, etc., and can solve the problems of increasing exhaust gas back pressure of exhaust equipment, etc.

CN102042061AInactive Publication Date: 2011-05-04DEERE & CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-05-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a device (22) for cooling an exhaust gas steam (18), which is provided with an exhaust gas pipe (24) for receiving the exhaust gas steam (18), wherein the exhaust gas pipe (24) is at least surrounded by a heating cover (26) which is at least partially equipped separately. The heating cover and an external surface of the exhaust gas pipe (24) form a convection area (30) which is used for the air (34) that is introduced from the outer environment (32). A pipe opening part (36) of the exhaust gas pipe (24), which extends relatively to the heating cover (26), extends into an open end (38) of an adjacent outlet pipe (40), so a negative pressure respectively to the environment (32) can be generated in a suction part (42) between the pipe opening part (36) of the exhaust pipe (24) and the outlet pipe (40) when the air (34) heated by the exhaust gas steam (18) in the convection area (30) raises.
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Description

technical field

[0001] The invention relates to a device for cooling an exhaust gas flow, which has an exhaust gas pipe for receiving the exhaust gas flow, wherein the exhaust gas pipe is at least partially surrounded by a heating hood arranged at a distance from the outside, which is formed with the outer side of the exhaust gas pipe for a Convective zone of incoming air. Background technique

[0002] This exhaust system consists of an exhaust pipe for discharging the exhaust gas flow from the diesel engine and a heating hood in the form of a tubular cover arranged at a distance on the outer side of the exhaust pipe, from the manufacturer John Deere's series 6030 already Know the agricultural tractor.

[0003] Exhaust gas standards issued by the European Union specify the gradual reduction of soot particles generated by diesel engines and emitted to the environment through engine exhaust gases. Soot emissions are limited by the use of soot filters, commonly known as wall ...

Examples

Embodiment Construction

[0018] figure 1 An exemplary embodiment of the device for cooling an exhaust gas flow according to the invention is shown mounted on an agricultural vehicle, wherein figure 2 A detail view of the device according to the invention is shown in longitudinal section.

[0019] The agricultural vehicle 10 includes a soot particulate filter 14 disposed within the engine compartment 12, wherein this filter consists of a conventional wall-flow filter in which engine exhaust gas produced by the diesel engine 16 of the agricultural vehicle 10 passes through a ceramic or metal filter. Porous filter walls made of material. The soot particles contained in the engine exhaust gas are here deposited not only on the surface of the soot filter 14 but also inside its filter walls. Because the exhaust gas back pressure increases with the degree of clogging of the filter walls, in order to regenerate the soot particulate filter 14, the deposited soot particles are burned at regular intervals, fo...