原文传递
NOxious problem
| 题名： | NOxious problem |
| 正文语种： | eng |
| 作者： | Toby Clark |
| 摘要： | Three quarters of the atmosphere consists of nitrogen, and while it is generally inert, at high temperatures and pressures it turns into potentially harmful nitrogen oxides (NOx - see sidebar overleaf). International emissions standards have legislated for lower NOx since the early nineties, with the Euro I limit as 8.0g/kWh. EGR was able to deal with this, but the real shift came in 2006 with the introduction of Euro IV: this limited NOx to 3.5g/kWh, and also drastically tightened hydrocarbon (HC) and particulates (PM) limits. |
| 出版年： | 2022 |
| 期刊名称： | Transport engineer |
| 期： | May |
| 页码： | 31-32 |
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