Diesel engine aftertreatment system catalyst sulfur poisoning processing method and device
A treatment method and technology of a treatment device, which are applied in the electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, exhaust gas treatment, etc., and can solve the problems of excessive emissions, post-treatment catalytic sulfur poisoning, and reduction of NOx conversion efficiency, etc. question
Inactive Publication Date: 2019-09-27
WEICHAI POWER CO LTD
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[0004] Since diesel oil contains sulfur element, after the catalyst of the after-treatment system absorbs too much sulfur, it will cause sulfur poisoning of the after-treatment catalyst, which will reduce the conversion efficiency of NOx, resulting in excessive emissions
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[0040] 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.
[0041] The treatment method and treatment device of the present invention are mainly applied in the ECU of the diesel engine, which can realize the real-time monitoring of the sulfur poisoning situation during the operation of the whole vehicle, so as to remove it in time, effectively reduce the emission and prolong the service life of the cat...
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The invention provides a diesel engine aftertreatment system catalyst sulfur poisoning processing method and device. The processing method comprises the steps that the real-time oil injection amount of an engine is obtained in real time; according to the fuel oil sulfur content obtained when the engine is started and the real-time oil injection amount, the mass flow rate of sulfur, entering the engine, of the fuel oil is calculated; according to the mass flow rate and the real-time obtained internal average temperature of an aftertreatment system, the sulfur content absorbed by a catalyst of the aftertreatment system is obtained; and if the sulfur content exceeds a preset value, a prompt message is sent out. Therefore, based on the real-time working conditions of the engine and the mass flow rate of the engine during starting, the adsorbed sulfur content is obtained, so that the prompt message can be sent out when the sulfur content exceeds the preset value, sulfur poisoning is timely judged, starting for removing the sulfur is achieved, emission is effectively reduced, and the service life of the catalyst is prolonged.
Description
technical field [0001] The invention relates to the technical field of diesel engines, in particular to a method and device for treating catalyst sulfur poisoning in a diesel engine aftertreatment system. Background technique [0002] With the gradual implementation of the National VI regulations, the country's emission requirements for heavy-duty vehicles have become increasingly stringent. [0003] Most diesel engines of heavy-duty vehicles use after-treatment systems such as DOC and SCR to control emissions. [0004] Since diesel oil contains sulfur element, too much sulfur will be poisoned to the aftertreatment catalyst after the catalyst of the aftertreatment system absorbs too much sulfur, which will reduce the conversion efficiency of NOx and lead to excessive emission. [0005] Therefore, when the post-treatment catalyst is poisoned by sulfur, it is necessary to send a prompt message in time to perform follow-up such as DPF regeneration in time to achieve the remova...
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Login to View More IPC IPC(8): F01N11/00
CPCF01N11/00F01N11/002F01N2900/1602Y02T10/40
Inventor 陈玉杰张成国赵伦李震
Owner WEICHAI POWER CO LTD