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Integrated post-treatment urea/diesel oil/air combined injection device and control method

An injection device, an integrated technology, which is applied to the electronic control of exhaust treatment devices, exhaust devices, exhaust treatment and other directions, can solve the problems of inconvenient control and complex structure of the post-treatment system, achieve simple structure and reduce NOx Emissions, easy-to-operate effect

Active Publication Date: 2020-09-18
JIANGSU UNIV
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Problems solved by technology

[0005] The SCR and DPF devices in the above post-treatment system all need to be equipped with special nozzles to realize the injection of urea and diesel, which makes the post-treatment system complex in structure and inconvenient to control

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  • Integrated post-treatment urea/diesel oil/air combined injection device and control method
  • Integrated post-treatment urea/diesel oil/air combined injection device and control method
  • Integrated post-treatment urea/diesel oil/air combined injection device and control method

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] An integrated post-treatment urea / diesel / air combined injection device designed by the present invention is as figure 1As shown, it includes a cylindrical outer shell, and the right end of the cylindrical outer shell is fixedly connected to the fluid channel sealing end cover 3, the mixing chamber 4 and the nozzle 5 in turn; the fluid channel sealing end cover 3 is provided with two outlets, which are respectively A Exit 7 and B Exit 8. The mixing chamber 4 is a tapered cavity that tapers from left to right, and the nozzle 5 is connected to the rightmost end of the mixing chamber 4 . In...

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Abstract

The invention discloses an integrated post-treatment urea / diesel oil / air combined injection device and a control method. A diesel oil channel, an air channel and a urea channel are axially arranged ina flow regulating rotating body; a fluid channel sealing end cover is provided with two outlets; an angle between the diesel oil channel, the air channel and the urea channel and the outlets of the fluid channel sealing end cover is adjusted by rotating the flow adjusting rotating body, so that switching of multiple supply modes is achieved; and during working, a sensor signal is collected by a controller, the real-time working state of a diesel engine is judged, and the SDCU controller respectively controls a supply device and the integrated combined injection device to switch the supply mode according to a selected working mode of a DPF and SCR integrated device, so that the regeneration requirements of the ultra-low emission and post-processing DPF of the diesel engine are met.

Description

technical field [0001] The invention belongs to the technical field of diesel engine combustion product treatment, in particular to an integrated aftertreatment urea / diesel / air combination injection device and a control method. Background technique [0002] The main combustion products of diesel engines include CO, HC, CO 2 , NO x gases and particulates, which are used in NO x The solution for gas post-treatment is mainly the selective catalytic reduction technology SCR (Selective Catalytic Reduction), which mainly uses ammonia and NO in urea solution x Reduction reaction to treat NO in exhaust x Gas, the method of setting a single urea nozzle at the exhaust pipe is widely used to reduce NO x Emissions need to be based on the different operating conditions of the diesel engine and the exhausted NO x The amount controls the urea injection amount and injection time. [0003] The post-treatment solution for particulate matter (PM) is to use a particle filter DPF (Diesel P...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N3/025F01N3/30F01N9/00F01N13/00
CPCF01N3/0253F01N3/206F01N3/2066F01N3/30F01N9/002F01N2250/02F01N2610/02F01N13/0097Y02T10/40
Inventor 王忠张启霞刘帅李瑞娜
Owner JIANGSU UNIV