A control method and device for preventing regeneration and sintering of particle filter

A particle trap and oxidation catalyst technology, which is applied to the electronic control of mufflers, exhaust devices, and exhaust treatment devices, and can solve problems such as sintering, low exhaust flow, and failure

Active Publication Date: 2016-02-10
WEICHAI POWER CO LTD
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Problems solved by technology

[0006] In the above scheme, in the initial stage of active regeneration of DPF, if sudden stop or sudden drop of engine speed and idle speed occur due to various uncontrollable factors, at the same time, active regeneration will increase the internal exhaust temperature of DPF to the passive regeneration temperature of 300°C to 500°C. After the DPF enters passive regeneration, if there is a lot of carbon deposit inside the DPF, it may be because there is no exhaust flow or the exhaust flow is too small, and the temperature of the DPF after passive regeneration is too high, resulting in DPF sintering, resulting in permanent failure of regeneration

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  • A control method and device for preventing regeneration and sintering of particle filter
  • A control method and device for preventing regeneration and sintering of particle filter
  • A control method and device for preventing regeneration and sintering of particle filter

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Embodiment Construction

[0054] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0055] In order to meet the requirements of the exhaust emission standard, a trap is usually placed in the exhaust emission part of the car to trap the tiny particles in the exhaust gas. The disadvantage of this method is that the exhaust gas discharge channel will gradually be blocked as the trapped particles accumulate. . Active re...

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Abstract

The invention discloses a control method for preventing regeneration and sintering of a particle catcher. The method comprises the following steps: acquiring regeneration related parameters of the particle catcher, wherein the regeneration related parameters comprise inlet temperature of an oxidation catalyst, outlet temperature of the oxidation catalyst, outlet temperature of the particle catcher, pressure difference of the particle catcher and air speed of the oxidation catalyst; increasing or decreasing the fuel injection quantity required by regeneration of the particle catcher according to the acquired regeneration related parameters; and injecting fuel according to the adjusted fuel injection quantity. The invention further discloses a control device for preventing regeneration and sintering of the particle catcher.

Description

Technical field [0001] The invention relates to the technical field of automatic control, and in particular to a control method and device for preventing the regeneration and sintering of a particle trap. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, people have gradually realized that improving the technical level of diesel engines is one of the most effective and economical means to maintain large-volume, low-cost production of automobiles and solve the dual pressure of environmental protection and energy saving. [0003] The harmful components of diesel engine exhaust are mainly carbon monoxide (CO), hydrocarbon (HC), nitrogen oxides (NOx), sulfides, particulate matter and odor, etc. Among them, NOx and particulate matter emissions are relatively large, especially particulate matter emissions. It is much higher than other types of vehicles. Tests have shown that diesel engine particulate matter emissions are dozens of time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N9/00F01N3/025
CPCY02T10/40
Inventor 王奉双邓玉龙张建华王意宝冯海浩张军苗垒
Owner WEICHAI POWER CO LTD
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