Grading control method for active regeneration of particulate filter

Abstract

The invention discloses a classification control method for the active regeneration of a particle trap, which is to obtain the carbon load and temperature of the real-time particle trap, determine a number of carbon load limit values ​​according to the amount of carbon load, and determine according to the temperature A number of temperature limit values, compare the real-time carbon load of the particle filter with the limit value of carbon load, compare the real-time temperature of the particle filter with the temperature limit value, and determine the mode of active regeneration. The mode of active regeneration is to control the engine to delay ignition Angle, lean air-fuel ratio, increase idle speed or a combination of more than one. The present invention determines the mode of active regeneration according to different carbon loads and areas where the temperature of the particle trap is located, as well as the calibration of the area, so as to ensure timely and effective removal of carbon deposits and reduce exhaust back pressure when the carbon load is too high.

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...

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