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Exhaust throttle device and engine SCR thermal management system

A thermal management system, exhaust throttling technology, applied in exhaust devices, engine components, engine control, etc., can solve the problems of low engine exhaust temperature, emission deterioration, poor activity, etc., to increase exhaust temperature and improve conversion. The effect of efficiency

Active Publication Date: 2017-09-29
WEICHAI POWER CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The temperature of the SCR catalyst is a key factor affecting emissions. Although the vanadium-based catalyst has a wide range of active temperatures, the activity of the vanadium-based catalyst will become poor when the exhaust gas temperature is too low, making the conversion efficiency of the catalyst low at low temperatures, which in turn It will lead to the deterioration of the emission of the engine due to the low exhaust temperature during operation

Method used

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  • Exhaust throttle device and engine SCR thermal management system
  • Exhaust throttle device and engine SCR thermal management system
  • Exhaust throttle device and engine SCR thermal management system

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Embodiment Construction

[0031] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0032] will now refer to Figure 1 to Figure 6 An exhaust throttling device for an engine SCR thermal management system and an engine SCR thermal management system having such an exhaust throttling device according to an embodiment of the present invention will be described.

[0033] Such as figure 1 As shown, the engine SCR thermal management system includes an SCR after-treatment device arranged on the exhaust pipe 1 of the engi...

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Abstract

The invention provides an exhaust throttle device for an engine SCR thermal management system. The exhaust throttle device is arranged at an exhaust pipe located at the front end of an SCR after-treatment device. The exhaust throttle device comprises a center shaft, a plurality of fan-blade shafts, a plurality of fan blades and a fan blade opening degree regulating mechanism, wherein the center shaft is supported inside the exhaust pipe, the fan-blade shafts penetrate through the exhaust pipe from the outer side in the radial direction and are inserted in the center shaft in a rotatable mode, each fan blade is fixedly arranged on the corresponding fan-blade shaft, and the fan blade opening degree regulating mechanism is arranged on the outer portion of the exhaust pipe. The fan blade opening degree regulating mechanism and the multiple fan-blade shafts are linked, and rotation of the fan-blade shafts can be controlled according to orders of an engine control unit, so that the opening of each fan blade is regulated. The invention further provides an engine SCR thermal management system with the exhaust throttle device.

Description

technical field [0001] The invention relates to SCR thermal management technology, in particular to an exhaust throttling device for an engine SCR thermal management system and an engine SCR thermal management system with the exhaust throttling device. Background technique [0002] SCR technology using urea as a reducing agent has been widely used in developed countries and regions as an important means of controlling vehicle diesel engine exhaust emissions, and it plays an important role in improving air pollution caused by diesel vehicle exhaust. [0003] Because vanadium-based catalysts have the characteristics of strong sulfur resistance, wide active temperature range, and economy, they are widely used in the purification of exhaust NOx of diesel engines. The temperature of the SCR catalyst is a key factor affecting emissions. Although the vanadium-based catalyst has a wide range of active temperatures, the activity of the vanadium-based catalyst will become poor when th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D9/04F02D9/10F01N3/20
CPCF01N3/2066F02D9/04F02D9/10Y02T10/12
Inventor 刘旭海刘正锐
Owner WEICHAI POWER CO LTD
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