基于低温工况速度变化的CAL3QHC模型修正

我国寒冷地区冬季具有交通拥挤严重、车辆加减速频率和怠速比例高、行驶工况恶劣、排放集中不易扩散等特点。针对上述特点，引入加减速排放参数改进CAL3QHC模型，在低温条件下利用台架实验对各类基础排放率进行修正，并根据实地调查寒冷地区城市道路交通特征修正IVE模型得到NO_x和PM的单车综合排放因子、加速排放因子和减速排放因子。通过对哈尔滨冬季实地调查和车载实验分析，对修正模型NO_x和PM的预测进行检验。研究结果表明，修正后的模型NO_x和PM的相对误差减小了9.2%和19.4%。

CORRECTION OF CAL3QHC MODEL BASED ON VELOCITY VARIATION IN LOW TEMPERATURE CONDITION

In winter, there are serious traffic congestion, high vehicle acceleration and deceleration frequency and high idle speed ratio of vehicles, harsh driving conditions and difficulty in spreading emissions in the cold regions in China. According to the above characteristics, this paper introduced the acceleration and deceleration emission parameters to improve the CAL3QHC model, and used the bench test to modify various basic emission rates under the low temperature condition. According to the field investigation of the urban road traffic characteristics in cold region, this paper revised the IVE model to get the comprehensive emission factors, acceleration emission factors and deceleration emission factors of NO_x and PM. Then, the prediction of NO_x and PM in the modified model was tested by field investigation and vehicle experiment analysis in Harbin in winter. The results indicated that the relative errors of NO_x and PM were reduced by 9.2% and 19.4%.