天然气作为重要的能源之一，在推广使用中，人们总是会担心天然气的安全性，其实各位车主们大可不必担心，天然气是易爆气体，在一系列的安全措施之后可以安全的将天然气用在汽车领域，今后我们不论是在生产上还是在生活上， 不是都在安全的应用着大量的电气设备。
As one of the important energy, natural gas in use, the people are always worried about the safety of gas, drivers in fact you don't have to worry about, natural gas is a explosive gas, after a series of security measures can safely use natural gas in the field of automobile, we both in production and in life, not all applications in security with a lot of electrical equipment.
首先，从燃料本身的特点来说，天然气的燃点一般在650℃以上，而汽油为427℃。天然气比汽油高出200℃以上，这说明天然气不象汽油那样容易被点燃。其次天然气在空气中燃烧时的体积界限是5%～15%，而汽油是1%～7%。即大气中有1%的汽油浓度就很容易发生着火爆炸。天然气要比汽油好的多，因为它要积累到5%才到达它的燃烧下限。
First of all, from the characteristics of the fuel itself, gas ignition point generally above 650 ℃, and gasoline is 427 ℃. Gas is above 200 ℃ higher than gasoline, it shows that gas is not easy to ignite like gasoline. Secondly the volume of a gas is burned in air line is 5% ~ 15%, and gasoline is 1% ~ 7%. 1% of the atmosphere of the fire explosion gas concentration is easy to occur. Natural gas is much better than gasoline, because it will accumulate to 5% to reach it burning.
更重要的是天然气比空气轻，其密度只是空气的55%，稍有泄漏，很容易向大气中扩散，不至于达到低燃烧界限。使用时还要在天然气里放加臭剂以提高对天然气泄漏的及早发现，从而采取预防措施。最重要的是，天然气在空气中的比例即使达到爆炸极限度,没有火源也不会发生爆炸。 所以在存放天然气的地方必须严禁烟火。
More important is natural gas lighter than air, its density is only 55% of the air, a slight leakage, it is easy to spread into the atmosphere, not achieve low combustion boundary. Even when using add smelly agent is put in the natural gas in order to improve the early detection of gas leaks, so as to take preventive measures. Most importantly, the ratio of natural gas in the air even reach the explosion limit, no fire and explosion. So in the gas storage areas must be strictly forbid fireworks.
其次，天然气发动机的燃料系统所用元器件不多，主要是一些开关和减压阀、混合器等，这些部件的关键是密封问题。选材、加工、安装、高度等都是在严格的质量保证的条件下进行的，不应有安全问题。在济南汽车油改气加气装置中，有自动定压、定温控制和断流截止阀。汽车上的油气转换开关能使发动机在停车后自动关闭油、气供应。
Second, the natural gas engine fuel system components, used mainly some switches and pressure reducing valve, mixer, etc., these parts is the key to sealing problem. Material selection, processing, installation, height is under the condition of strict quality assurance, should not have security issues. In jinan car oil to gas gas device, automatic constant pressure, constant temperature control and flow cut-off valve. Oil and gas switch on the car can make the engine after parking the oil, gas supply will be automatically closed.
