NTE测试法规要求
The US EPA has introduced not-to-exceed (NTE) emission limits and testing requirements as an additional
instrument to make sure that heavy-duty engine emissions are controlled over the full range of speed and load
combinations commonly experienced in use. NTE testing does not involve a specific driving cycle of any specific
length (mileage or time). Rather, it involves driving of any type that could occur within the bounds of the NTE
control area, including operation under steady-state or transient conditions and under varying ambient conditions.
Emissions are averaged over a minimum time of thirty seconds and then compared to the applicable NTE emission
limits.