车用催化器起燃特性的评价方法

A Method for Evaluation the Incipient Combustion Performance of Catalytic Converter of Vehicles

研究了国外在冷起动催化器起燃特性方面的现状，分析了冷起动特性评价实验方法的影响因素。参照１５工况测试时的排气温度变化，提出了冷起动催化器起燃时间特性评价的实验方法，并用该方法对 ３个催化器的起燃特性进行了评价。与起燃温度特性实验结果对比表明，该方法可以准确地评价催化器的起燃特性。

The current situation of incipient combustion performance of foreign vehicles at cold strart is studied. The influencing factors of evaluating the cold start performance by experimental method are analyzed. The experimental method for evaluating the incipient combustion performance of catalytic converter at cold start is raised. The practical evaluation was made on three catalytic converters using the method. The comparision was made with result of incipient combustion performance test. The comparison result shows that the incipient combustion performance of catalytic converter can be evaluated accurately with this method.