Active regeneration grading control method for particle trap

Abstract

The invention discloses an active regeneration grading control method for a particle trap. The active regeneration grading control method aims to acquire the real-time carbon loading amount and temperatures of the particle trap. According to the carbon loading amount, a plurality of carbon loading limit values are determined, a plurality of temperature limit values are determined according to thetemperatures, the real-time carbon loading amount and the carbon loading amount limit values of the particle trap are compared, the real-time particle trap temperatures and the temperature limit values are compared, an active regeneration mode is determined, and the active regeneration mode is one or a combination containing more than one of the conditions that an engine is controlled to defer theignition angle, the air-fuel ratio becomes lean, and the idle speed is increased. According to the active regeneration grading control method for the particle trap, the mode of active regeneration isdetermined according to the regions where different carbon loading amount and the temperatures of the particle trap are located and the marking of the region, so that the carbon deposition is effectively removed in time when the carbon loading amount is too high, and the exhaust back pressure is reduced.

Description

technical field [0001] The invention belongs to the motor vehicle emission control technology, in particular to a particle trap regeneration technology, in particular to a particle trap active regeneration control technology. Background technique [0002] In order to improve the environmental requirements of exhaust emissions, particle traps have been widely used in motor vehicles. Particle traps can capture more than 90% of the number of particles in car exhaust. However, the captured particles will adhere to the filter body of the filter. As the particles continue to accumulate, the exhaust resistance of the engine will continue to increase. When the particle filter is severely blocked, the back pressure of the engine exhaust system will increase. The engine power and economy will also deteriorate. In order to solve this problem, the regeneration technology of particle filter came into being. [0003] Existing regeneration techniques for particle traps include passive r...

AI Technical Summary

Problems solved by technology

[0005] CN108757116A discloses "An Actively Regenerated Particle Trap and Its Control Method", which uses a heat transfer medium to transfer heat to the filter body of the particle trap, and solves the problem of uniform heating in the regeneration process of the particle trap through an electric heating device. question

The above two active regeneration control methods are not realized by changing the engine parameters

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