Calibration method based on dew point of whole vehicle oxygen sensor

The invention relates to a calibration method based on a dew point of a whole-vehicle oxygen sensor, and the method comprises the steps: preparing before calibration: installing at least two thermocouples near the oxygen sensor, so as to represent the wall temperature and the exhaust temperature of the oxygen sensor; calibrating a dew point heat integral limit value MAP; the catalyst is heated to correct CUR calibration; air inflow correction CUR calibration is carried out; performing MAP calibration on the exhaust and cooling characteristics; the dew point heat integral threshold correction CUR calibration is repeatedly started; and calibrating and verifying. According to the calibration method based on the dew point of the oxygen sensor of the whole vehicle, the dew point of the oxygen sensor is accurately controlled by calibrating the dew point heat integral limit value MAP, the catalytic converter heating correction CUR, the air inflow correction CUR, the exhaust temperature reduction characteristic MAP a