Post-treatment system control method and device

A control method and control device technology, which is applied in the direction of electric control of exhaust treatment devices, exhaust treatment, noise reduction devices, etc., can solve the problems of uncontrollable adsorption and desorption of NOx gas process, poor NOx-gas treatment effect, etc. , to achieve the effect of improving the working effect and increasing the exhaust temperature

Active Publication Date: 2019-06-28
WEICHAI POWER CO LTD
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Problems solved by technology

[0004] In the prior art, for an aftertreatment system equipped with a PNA, the working state of the PNA depends entirely on the temperature of the exhaust gas flowing through the PNA, and the process of adsorbing and desorbing NOx gas is uncontrollable, resulting in poor treatment effect of NOx-gas

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  • Post-treatment system control method and device

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] see figure 1 , figure 1 It is a structural block diagram of the post-processing system provided by the embodiment of the present invention. On the basis of the post-processing system including PNA in the prior art, the post-processing system provided by the embodiment of the present invention also includes: a first heater 10, a second...

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Abstract

The invention provides a post-treatment system control method and device which are applied to the technical field of automobiles. A post-treatment system comprises a PNA, a first heater arranged at agas inlet of the PNA and a second heater arranged at a gas outlet of the PNA. The method comprises the following steps that characteristic parameters representing the operation condition of the post-treatment system are acquired firstly, if according to the characteristic parameters, it is determined that the post-treatment system is at the operation condition under which exhaust gas temperature of the gas outlet of the PNA needs to be increased, the first heater is controlled to be in a shutdown state, and meanwhile, the second heater is started; and if according to the characteristic parameters, it is determined that the post-treatment system is at the operation condition under which exhaust gas temperature of the gas inlet of the PNA needs to be increased, the first heater is controlledto be in a started state. The heaters are arranged at the gas inlet and the gas outlet of the PNA correspondingly, and the heaters are controlled, so that active control over the working state of thePNA is achieved, the mutual cooperation between the PNA and other post-treatment components in the post-treatment system is achieved, and the treatment effect of NOx gas is improved.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a method and device for controlling an aftertreatment system. Background technique [0002] In the aftertreatment system of diesel engine, PNA (Passive NO x Absorber, NO x Adsorber), the use of PNA can adsorb NO at low temperature x gas, and release the adsorbed NO at high temperature x characteristics of gases that carry ultra-low NO x Gas emission control. [0003] In order to improve the treatment effect of the aftertreatment system on engine exhaust, SCR (Selective Catalytic Reduction, Selective Catalytic Reduction), DPF (Diesel Particulate Filter, Diesel Particulate Filter), and DOC (Diesel Oxidation Catalyst, Diesel oxidation catalyst) and other components are used in conjunction with PNA. [0004] In the prior art, for an aftertreatment system equipped with a PNA, the working state of the PNA depends entirely on the temperature of the exhaust gas flo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/08F01N3/20F01N9/00F01N13/00
CPCY02T10/40Y02A50/20
Inventor 王晓华张瑜王东升
Owner WEICHAI POWER CO LTD
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