Time-speed data points: JE05
Japanese 2005 emission standards introduced new JE05 (also known as ED12) emission test cycle for heavy vehicles of gross vehicle weight (GVW) above 3,500 kg. The JE05 cycle is a transient test based on Tokyo driving conditions, applicable to diesel and gasoline vehicles.
The duration of the test is approximately 1800 s, the average speed is 26.94 km/h, and the maximum speed is 88 km/h. The JE05 test is defined through vehicle speed vs. time points, as shown in the following chart.
Figure 1. JE05 Test Cycle for Vehicles > 3,500 kg GVW
For engine dynamometer testing, engine torque-speed-time data must be generated based on the vehicle speed points. Computer programs to generate the torque-speed data for both gasoline and diesel engines have been provided by the Japanese Ministry of Environment (see Test Cycles links).