Method for verifying maximum carbon loading capacity of DPF (diesel particulate filter)

The invention discloses a DPF maximum carbon load verification method, which comprises the following steps of: arranging a thermocouple in a DPF of a laboratory engine test bed, regenerating, weighing the mass M1 of the DPF after regeneration, carrying out carbon accumulation on the DPF, weighing the mass M2 of the DPF after carbon accumulation, calculating the actual carbon load X2 by M2-M1, and carrying out a regeneration mode again after X2 meets a standard value, when regeneration operation is performed to the idle speed reducing moment, the engine is controlled to be in the idle speed working condition, then the maximum temperature of a thermocouple is determined, the maximum temperature is compared with the maximum temperature limiting value allowed by the DPF, and finally the actual carbon loading capacity of the PDF is obtained. According to the invention, the maximum carbon loading capacity of the particulate filter under the real vehicle working condition can be accurately measured, so that the serv