Intelligent control method for after-treatment regeneration of engine for engineering machinery

Abstract

An intelligent post-treatment and regeneration control method for an engineering machinery engine, comprising an automatic and manual regenerated auxiliary load loading control method: The method steps include, when the accumulation of the particles in a diesel particulate filter exceeds a specified standard and the exhaust temperature of the engine is higher than the regeneration required temperature, an engine controller transmits an auxiliary regeneration packet; after receiving the packet, a main controller determines the external environment temperature; the main controller supplies corresponding current for the regeneration electromagnetic valve of the particulate filter according to the obtained external environment temperature and the corresponding relationship between a preset environment temperature and a loading current, so as to obtain a load matching the environment temperature; and the main controller monitors the exhaust temperature at the inlet of the diesel particulate filter catalytic converter to achieve automatic closed-loop control of the regeneration auxiliary loading.

Description

technical field [0001] The invention relates to an intelligent control method, in particular to an intelligent control method for aftertreatment regeneration of an engine used in engineering machinery. Background technique [0002] At present, with the deepening of the concept of environmental protection and energy saving in the world, the emission requirements of engines have become higher and higher, and exhaust gas purification technology is widely used in Euro IV engines. When the diesel engine exhaust gas purification system is applied to construction machinery such as excavators, there are defects such as that the operation must be stopped for manual regeneration, the regeneration effect is poor at light loads, and the operating efficiency is low. A Chinese patent with the publication number CN 101737124A introduces a The exhaust gas purification system of construction machinery can efficiently burn and reduce the particulate matter accumulated on the filter by using t...

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Problems solved by technology

[0007] In view of the above existing needs, the problem that the loading load cannot be automatically adjusted according to the external ambient temperature and the temperature of the diesel oxidation catalyst during the manual load loading and fixed value load loading process, the purpose of the present invention is to provide a construction machinery The intelligent control method of engine post-processing regeneration adopts a closed-loop control method, that is, during the automatic loading process, the loading load is automatically adjusted by monitoring the external ambient temperature and the temperature of the diesel oxidation catalyst, so as to realize the intelligent and precise control of automatic load loading

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