声明：我是2014年1月的车，旧款我没机会试试力量

2015.1.14更新

今天看见这帖被扒出来了，然后我想再写一下最近的思考，本来想改标题，想想还是不改了，也算是给后来者看懂原来发生的事情（标题字数限制还是改了一点）。

今天说一下对这件事的最新看法，大家自己决定，绝对没有禁止谁的意思，而且凭我自己也没那能耐！

最新的看法是：

1：可以选择支撑杆换方向，这样在绝大多数情况下，气弹簧处于正确位置，但当支撑杆越过水平线后会支撑无力。

2：也可以保持原样，但做好清洁和润滑，北方我不敢说，没实验，但南京以南可以1个手指助力到支撑杆越过水平线后快速开门(我自己保持了原状，8秒开门到顶)。

3：车友   772195254     换1根的方法我看行，折中，有换这种方式的车友，请记得回来报告效果，造福大伙儿啊！！

哪种方式任君自便，因为都不是正确方式，我只是开了帖就坚持写完整，喜欢人身攻击的请留口德，谢谢！

以下原文摘录于专业厂家

How do gas springs work ?

A gas spring is basically a system consisting of a pressure tube, rod and piston. The energy for the spring is provided by gas at high pressure and the whole system is self contained and sealed against loss.

Where:

F = Expressed in Newtons (N)

P = Gas pressure in Pascals (Pa) (Newtons per square metre)

a = Rod cross section in square metres (m^2)

A = Piston cross section in square metres (m^2)

Compression ratio - "K Factor" 

Because the gas spring is a closed system, as the rod is pushed into its body, the gas has nowhere to go and therefore the gas in the spring compresses and its pressure increases. If P1 is the force of a fully extended gas spring and P2 the force of the same spring when compressed then: 

K = P2 / P1 

.

If there was no friction in the gas spring, the graph of the force expressed in function of the stroke would be linear and would look like the following:

The importance of Nitrogen

Compressed air should never come in contact with oil, otherwise the mixture will explode in the same way diesel does when it is injected in a diesel engine.

Nitrogen is a neutral gas that is economical to obtain and use. Because it is neutral and used pure without oxygen, it will not react with oil when put under a very high pressure. It is therefore the best choice for gas springs.

Why should springs be used rod down ?

In order to keep the rod seal lubricated, a small amount of oil is used in every gas spring. When used rod down, the oil is kept in contact with the rod seal which improves the sealing properties and ensure the seal will never become dry.

For this reason, one of the basic recommendations when incorporating gas springs in your design, is to make sure they are used at an angle of less than 60 degrees from the vertical.

The oil used in the gas spring is also useful to obtain a high damping effect on the last few millimeters of the stroke.

If the gas spring was not used rod down, the piston would not have to go through the oil at the end of the extension and no damping effect would occur.

When this is not possible and the gas spring has to be used either rod up or near horizontal, we specify an oil chamber or a fully damped gas spring.

While these solutions are not as economical as standard gas springs, they will ensure your gas springs will last as long as a standard gas springs used with the rod facing down.

上面这个是FLASH动画，无法复制，只好截图了，

看见没，结构是不一样的，全阻尼才用于支撑杆向上结构！

所以风2的换了方向升的慢是正常现象，因为我们的不是全阻尼气弹簧，不可以活塞杆向上！换过来也只是水平方向以下那段是对的，也好开。

2014.12.10号更新，下面这个图才是正确的方式和支点，也就是这层楼最后那张图的样子，想反向的兄弟自己试试吧，我的差不多就装回原样了。

今天下雨，气温也低，没有昨天自动升的利索，不手推一下就定在那里不动，想说我全程手推的，随便说去吧。

昨天起，关于换气压杆方向解决开启困难的帖大家都看了，我也跃跃欲试，本来打算中午再弄，进公司后，把各种

带支撑杆的进口设备一一掀开，结果全是活塞杆向下的，再上网一查，原来奇瑞那个是正确的安装方式，那么只能说可能奇瑞选择的安装支点有问题，反正我用后备箱时间不多，不改了，想改的自己斟酌。

2014.12.8,中午在同事的协助下，先反向安装，的确感觉轻了一些，但是要说翻天覆地绝对夸张，今天早上7点，上班前开后盖很困难，全程手推上去的（冻一晚上难开，改过的也请在早上去试试！），可是中午反向安装前，因为在阳光下，晒了一上午，当门提到气压杆还没有到水平位就松手，盖子自己就升上去了，是缓慢升的，这个符合气弹簧的设计要求，反复比较后，我还是按原状装回了，其实我仔细看了一下气压杆两端的固定端子，做的比较粗糙，和我们公司那些设备的不能比，油里面也有脏东西，这个才应该是后盖不好开的原因吧。

还有拆下的2根气弹簧不一样长，原来本体后端是螺纹拧上去的，有一根没拧紧，顺手拧紧，复位后，至少在我车上并未感觉有根本性改善。

还是那句话，想改的自己斟酌！！

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