Abstract:

Actual vehicle emission tests were carried out according to the Ⅱ type-approval test requirements of Real Driving Emssion (RDE) with an on-sell car to verify whether the selected driving routes can meet the RDE test requirements, while investigating the engine work areas. The results show that the selected route
can effectively meet the basic requirements of the test (urban-city-highway) with driving pattern satisfying the validation of driving dynamics characteristics. And the emission results from the real route show that Conformity Factor (CF) values, calculating from Worldwide harmonized Light Vehicles test Cycle (WLTC) results, are higher than those given by the regulation. Therefore, the emission regulations need to consider the CF value setting. The engine work area is significantly larger than that in WLTC, thus significantly increasing work of calibration optimization.

Key words: real driving emissions (RDE), portable emission measure system (PEMS), pollutant emissions, engine work area, driving mode