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

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...

AI Technical Summary

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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