应用于国Ⅲ摩托车的富钯涂层配方的研究

通过对不同催化作用涂层的对比，特别是针对小型摩托车活性、耐久性和贵金属成本的应用设计，提出以钯为主要或单一活性贵金属化合物涂料的研究数据，这些数据是通过使用合成气体反应器，对涂敷后的催化剂进行模拟发动机废气测试得到的。通过试验表明，较低成本的富钯催化涂料可用于小型摩托车的有效减排。此外，在110mL缸头补气与125mL中间补气摩托车上，按照摩托车欧Ⅲ和国Ⅲ排放法规运行ECER40冷起动循环，对不同配方催化剂的活性进行了测试，这些结果将与合成气体反应器测试结果相关联。

On the Way Towards Palladium Rich Washcoat Formulations for China Ⅲ Motorcycles

This paper will present a comparison of different catalytic coatings especially designed for small motorcycle application with regard to activity and precious metal costs. Since recent catalytic formulations for this application widely use rather expensive Pt/Rh （platinum/rhodium） formulations, this paper will present data for less expensive coatings which use palladium （Pd） as the main active precious metal compound. We will also show that less expensive Pd-rich catalytic coatings can be used for an effective emission reduction of small motorcycles. The presented data have been obtained by synthetic gas reactor testing using a simulated engine exhaust gas for coated catalysts. In addition, the activity of different formulations has been tested using a 110 mL motorcycle with SAI at the cylinder head and a 125 mL motorcycle with SAI between the catalysts, running the ECE R40 cold-start cycle which is used for the EurolJJ and Chinam emission regulation for motorcycles. These results will be correlated with the results of the synthetic gas reactor tests. The motorcycles were driven for at least 1 000 km to reach stable engine conditions.