The car rarely uses n gear? There may be something wrong with your gearbox!

對(duì)于自動(dòng)擋汽車(chē)來(lái)說(shuō)，很多人認(rèn)為變速箱上的N擋沒(méi)什么卵用，因?yàn)樗麄兤綍r(shí)開(kāi)車(chē)很少用到N擋（空擋）。駐車(chē)時(shí)基本都是直接掛到P擋，而等紅燈時(shí)要么是掛P擋，要么是D擋+剎車(chē)，很少有人會(huì)掛入N擋，因?yàn)榫G燈亮后再掛回D擋比較繁瑣、浪費(fèi)時(shí)間，不如一直保持在D擋上，一旦綠燈亮了直接松開(kāi)剎車(chē)就能走······然而，汽車(chē)工程師不是傻，既然設(shè)計(jì)了N擋，就一定有它存在的道理。事實(shí)上，對(duì)自動(dòng)變速箱的保護(hù)就是N擋存在的非常大的意義。下面就來(lái)給大家介紹一下自動(dòng)變速箱上的N擋在我們?nèi)粘Ｓ密?chē)中都有哪些作用：

For automatic cars, many people think that n gear on the gearbox is useless, because they rarely use n gear (neutral) when driving. When parking, they basically shift to gear P directly. When waiting for a red light, they either shift to gear P or gear d + brake. Few people will shift to gear n, because it is cumbersome and waste time to shift back to gear d after the green light is on. It's better to keep in gear d all the time. Once the green light is on, they can go by releasing the brake... However, automotive engineers are not stupid. Since they have designed gear n, There must be a reason for its existence. In fact, the protection of automatic transmission is of great significance for the existence of N gear. Now let's introduce the role of N gear on the automatic transmission in our daily vehicles:

駐車(chē)時(shí)N擋的作用

Function of gear n during parking

很多朋友在停車(chē)場(chǎng)停車(chē)時(shí)，一旦將車(chē)停入車(chē)位后，無(wú)非就是兩種做法：1、先掛P擋，再拉手剎(或電子手剎)走人；2、先拉手剎（或電子手剎），再掛P擋走人。其實(shí)這兩種做法在一定程度上都比較損車(chē)。對(duì)于這一種做法而言，因?yàn)樽詣?dòng)變速箱的P擋都帶有鎖止功能，也就是說(shuō)車(chē)輛內(nèi)部會(huì)有一個(gè)卡子扣住變速箱的齒輪來(lái)讓車(chē)達(dá)到靜止的狀態(tài)。如果是先掛入P擋再拉手剎的話(huà)，那么車(chē)輛停止時(shí)所受到的拉扯力基本都作用在了變速箱的齒輪和卡子上，長(zhǎng)期下去會(huì)對(duì)變速箱的齒輪造成磨損，縮短變速箱的使用壽命；而如果是像二種做法那樣先拉手剎再掛P擋的話(huà)，在平地還好，變速箱齒輪和卡子受到的拉扯力會(huì)小很多，基本都作用在了手剎系統(tǒng)里的鋼絲拉線(xiàn)上了。

When many friends Park in the parking lot, once they park their car in the parking space, there are only two ways: 1. First shift to gear P, and then pull the hand brake (or electronic hand brake) to leave; 2. First pull the hand brake (or electronic hand brake), and then shift to p gear to leave. In fact, these two practices are more damaging to the car to a certain extent. For this approach, the P gear of the automatic transmission has a locking function, that is, there will be a clip inside the vehicle to fasten the gear of the transmission to make the vehicle reach a stationary state. If you first shift into gear P and then pull the handbrake, the pulling force received when the vehicle stops basically acts on the gears and clips of the gearbox, which will cause wear to the gears of the gearbox and shorten the service life of the gearbox in the long run; If you pull the handbrake first and then shift to gear P as in the second method, it's OK on the flat ground. The pulling force on the gearbox gear and clip will be much smaller, which basically acts on the steel wire cable in the handbrake system.

但如果地面不平是個(gè)斜坡的話(huà)，汽車(chē)向坡底下溜的那個(gè)慣性沖力不光會(huì)使手剎系統(tǒng)中的鋼絲拉線(xiàn)受力加大，也會(huì)在一定程度上增加變速箱齒輪和卡子的咬合力，這樣依舊會(huì)對(duì)手剎系統(tǒng)和變速箱齒輪造成磨損。所以，此時(shí)N擋的作用就顯現(xiàn)出來(lái)了。自動(dòng)擋汽車(chē)在停車(chē)時(shí)的原則是：不論什么地形，一定要先讓車(chē)自己找平，這樣停車(chē)時(shí)才能大程度地減小變速箱齒輪和鋼絲拉線(xiàn)所受的拉扯力。而要達(dá)到找平的效果，使用N擋是很有必要的。因此自動(dòng)擋汽車(chē)正確的做法應(yīng)該是：停車(chē)踩住剎車(chē)――掛入N擋――松開(kāi)腳剎車(chē)――拉手剎（或電子手剎）――進(jìn)P檔――熄火走人。

However, if the ground is uneven and it is a slope, the inertial impulse of the car sliding towards the bottom of the slope will not only increase the stress on the steel wire stay wire in the handbrake system, but also increase the bite force of the gearbox gear and clip to a certain extent, which will still cause wear to the handbrake system and gearbox gear wheel. Therefore, the role of N gear appears at this time. The principle of automatic car parking is: no matter what terrain, the car must level itself first, so as to greatly reduce the pulling force on the gearbox gear and steel wire cable. To achieve the leveling effect, it is necessary to use n gear. Therefore, the correct way for an automatic car should be: stop and step on the brake - shift into gear n - release the foot brake - pull the hand brake (or electronic hand brake) - enter gear p - stop and leave.

等紅燈時(shí)N擋的作用

Function of N gear when waiting for red light

在諸如等紅燈或臨時(shí)停車(chē)等人這樣的短暫停車(chē)時(shí)，很多人要么就是D擋+剎車(chē)，要么就是直接掛P擋。在這里，小編要提醒大家一點(diǎn)，無(wú)論怎么樣，短暫停車(chē)時(shí)不要掛P擋。因?yàn)閽烊隤擋，變速箱的齒輪就會(huì)跟卡子相互咬合住，如果此時(shí)后方冷不丁的給你來(lái)個(gè)追尾，力度大點(diǎn)會(huì)直接把你的變速箱頂爛，即便力度輕也會(huì)頂斷你變速箱的齒輪，那樣維修起來(lái)不光麻煩，費(fèi)用也很昂貴。

In such short-term parking as waiting for a red light or temporary parking, many people either shift to D + brake or directly shift to P. Here, Xiaobian would like to remind you that no matter what, don't shift to p gear when stopping for a short time. When you shift into gear P, the gear of the gearbox will bite each other with the clip. If the rear is cold at this time, you will have a rear end collision. If the force is strong, it will directly top your gearbox. Even if the force is light, it will break the gear of your gearbox. In that way, maintenance is not only troublesome, but also expensive.

如果在等紅燈（或臨時(shí)停車(chē)等人）時(shí)，一直保持D擋+剎車(chē)的話(huà)，變速箱并沒(méi)有切斷發(fā)動(dòng)機(jī)與車(chē)輪之間的連接，這樣不光沒(méi)有降低發(fā)動(dòng)機(jī)的負(fù)荷來(lái)達(dá)到省油的目的，發(fā)動(dòng)機(jī)的振動(dòng)也會(huì)很清晰地傳遞到車(chē)內(nèi)，帶動(dòng)車(chē)廂一起輕微震動(dòng)。因此，我們?cè)诙虝和＼?chē)時(shí)，如果停車(chē)時(shí)間超過(guò)30秒，方式式是掛N擋+拉手剎（防止在不平的地面車(chē)輛出現(xiàn)溜車(chē)現(xiàn)象）。當(dāng)然，對(duì)于有Auto Hold自動(dòng)駐車(chē)功能的汽車(chē)來(lái)說(shuō)，由于Auto Hold功能可以使車(chē)輛在短暫停車(chē)時(shí)自動(dòng)啟動(dòng)四輪制動(dòng)，即便在D擋或N擋你也無(wú)需一直腳踩剎車(chē)或使用手剎，車(chē)子始終處于靜止?fàn)顟B(tài)。因此，這時(shí)候可以不掛“N”擋，直接掛“D”擋也是可以的。

If you keep D gear + brake when waiting for a red light (or temporary parking, etc.), the gearbox does not cut off the connection between the engine and the wheels, which not only does not reduce the load of the engine to save fuel, but also the vibration of the engine will be clearly transmitted to the car and drive the car to vibrate slightly. Therefore, when we stop for a short time, if the parking time exceeds 30 seconds, the mode is to engage gear n + pull the hand brake (to prevent the vehicle from sliding on uneven ground). Of course, for vehicles with auto hold automatic parking function, because the auto hold function can automatically start the four-wheel brake when the vehicle stops for a short time, you don't need to step on the brake or use the hand brake all the time even in gear d or N, and the vehicle is always stationary. Therefore, it is possible not to shift to "n" gear at this time, but to shift to "d" gear directly.

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