Air & Transportation

Future Policy for Motor Vehicle Exhaust Emission Reduction(second report) - Attached Table 4

Attached Table 4: Exhaust Emission Measurement Mode to Be Applied to Diesel Off-road Vehicles

In these tests, the measuring mode is made on the mass unit time of the exhaust gas discharged from the exhaust pipe of a vehicle when it is operated under the conditions shown in the middle column of the table below. The measured mass is multiplied by the coefficient in the right column and then this multiplied result is added, while the work rate arising from the operation of the vehicle under conditions shown in the middle column is multiplied by the coefficient in the right column and then this multiplied result is added. The multiplied mass result is divided by the multiplied work rate result to obtain the exhaust emission mass per unit time and per unit work rate.

Mode number Engine speed Load (%) Coefficient
(Weight factor)
1 Rated 100 0.15
2 Rated 75 0.15
3 Rated 50 0.15
4 Rated 10 0.10
5 Intermediate (Note) 100 0.10
6 Intermediate (Note) 75 0.10
7 Intermediate (Note) 50 0.10
8 Idle - 0.15
(Note)
For engines that are designed to operate over a speed range on a full-load torque curve, the intermediate speed shall be the declared the maximum torque speed if it occurs between 60% and 75% of the rated speed. If the declared maximum torque speed is less than 60% of the rated speed, then the intermediate speed shall be 60% of the rated speed. If the declared maximum torque speed is greater than 75% of the rated speed, then the intermediate speed shall be 75% of rated speed.
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