| 单词 | Smog check |
| 释义 |
Smog check
原声例句
2005 English Cafe A smog inspection – more commonly called here a " smog check" (check) – is usually done by putting up a small pipe that measures pollution into the back of your car, into what's called a " tail (tail) pipe." A tailpipe is also called an exhaust pipe. 烟雾检查——这里更常被称为“烟雾检查”（检查）——通常是通过在你的汽车后部安装一个测量污染的小管子，进入所谓的“尾（尾）管”来完成的。排气管也称为排气管。
英语百科
Emission test cycle（重定向自Smog check）
An emission test cycle is a protocol contained in an emission standard to allow repeatable and comparable measurement of exhaust emissions for different engines or vehicles. Test cycles specify the specific conditions under which the engine or vehicle is operated during the emission test. There are many different test cycles issued by various national and international governments and working groups. Specified parameters in a test cycle include a range of operating temperature, speed, and load. Ideally these are specified so as to accurately and realistically represent the range of conditions under which the vehicle or engine will be operated in actual use. Because it is impractical to test an engine or vehicle under every possible combination of speed, load, and temperature, this may not actually be the case. Vehicle and engine manufacturers may exploit the limited number of test conditions in the cycle by programming their engine management systems to control emissions to regulated levels at the specific test points contained in the cycle, but create a great deal more pollution under conditions experienced in real operation but not represented in the test cycle. This results in real emissions higher than the standards are supposed to allow, undermining the standards and public health. |
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