Post-processing control unit for ammonia storage and supply in two-stage waste heat mode

A technology for ammonia storage, ammonia supply, and control unit, which is applied to the electronic control of exhaust treatment devices, exhaust treatment, engine components, etc. It can solve problems such as no clear instructions, technical personnel can’t implement, and no increase ratio, etc., to achieve full usability effect

CN102733913BActive Publication Date: 2016-07-20CHINA FIRST AUTOMOBILE

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: CHINA FIRST AUTOMOBILE
Publication Date: 2016-07-20

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Abstract

The invention relates to a post-processing control unit of ammonia storage and supply in a two-stage afterheat manner, which is characterized in that by adopting the afterheat of backflow cooling liquid of an engine, an active ammonia storage compound is heated, and ammonia is released; according to the exhaust condition level of the engine, the ammonia is introduced into the front end of an SCR (Selective Catalytic Reduction) postprocessor by means of the control unit, and the conveying injection and the atomizing decomposition of liquid-free urea are realized in an SCR system; and the system is provided with two active material storage tanks; and the secondary ammonia storage tank is firstly activated when a vehicle is started to quickly respond and reduce the pollutant discharge in the cold start. The system has the characteristic of flexibility, can satisfy the emission control target in the low-temperature cold start of the vehicle, is low in price, high in reliability and convenient to use, is used for an SCR national level-4 system or above, can also be used for an FCEV (Fuel Cell Electric Vehicle) system, satisfies the application demands of the future automobile industry and has practical values.

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Description

technical field

[0001] The invention relates to a post-processing control unit for ammonia storage and supply in a two-stage waste heat mode, which is mainly used in the SCR post-processing industry of automobile exhaust, and is also suitable for FCEV energy storage systems of fuel cells. Background technique

[0002] At present, the world is facing comprehensive challenges of energy and environment. In terms of the selection of technical means to meet the emission standards of traditional vehicles, people still face many difficulties, for example, how to choose the technical means of after-treatment and so on.

[0003] SCR (SelectiveCatalyticReduction) catalytic conversion reduction technology is a traditional post-treatment technology. The essence of this traditional SCR technology using liquid urea is to use urea to decompose ammonia at high temperature, ammonia as a reducing agent and NOX in engine exhaust react under the combined action of catalyst and temperature, and...

Claims

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