FW: 開山路打檔救命教學

[BATA Editor]

開山路打檔救命教學

 

救命用，不可不看！以下為正文：

 

當上坡遇到熄火情況時，第一件事情"絕對不是腳踩剎車"，而是"緊急把手剎車"及打檔到低速檔（最好是1檔，自排車為L檔），且千萬不要想說用方向盤去改變行徑方向，屆時方向盤會變得很重不易操控。

 

我的建議是自排車在行駛陡峭山路時，請使用2檔或L檔(上山與下山皆使用低檔位)，使用D檔是很危險的行為，尤其是在下坡的時候，D檔往往因為速度快而使用高檔低轉速，對於引擎老舊的車款很容易因轉速過低或供油不順而熄火，而手排車也要使用低檔位，切勿放空檔滑行！

 

為什麼呢?我們的汽車都具有"剎車增力系統"(Brake Air Booster)，你可曾想過，人類腳的力量為何有辦法將重達一噸多的汽車煞停? 原理我在這不贅述，簡單來說就是利用引擎運轉的動力，來增加腳踩剎車的動力(即放大腳踩的力道)。(動力方向盤也有異曲同工之妙，都是利用引擎動力。

 

當車輛熄火時，這時只會剩下一到兩次的機會使用腳踩剎車，注意!如果踩了就不要放掉!放了要踩就沒辦法再踩了!第一時間千萬不要想去重新發動車輛!因為你根本沒有反應時間!應該是想辦法讓車輛停止不動，這次新聞中的巴士從熄火到墜落山谷， 很可能只有三到五秒，這三到五秒就是黃金救命時間! 做錯一步都很可能發生遺憾！

 

總結以上，上下坡遇到熄火三步驟：

 

1.立刻拉起手剎車（能拉多少就拉多少）

2.將檔位排入低檔位（自排車為L檔，手排車為一檔）

3.用全力踩住腳剎車(不要放開)，等待車停之後再嘗試重新發動車輛，倘若坡度太陡仍有向後滑趨勢，不要懷疑 跳車就對了!生命比較重要！車沒了可以再買，命可沒辦法了！

 

這不是一篇道聽塗說的文章，想要瞭解真正的剎車原理， 上網GOOGLE搜尋一下"剎車倍力器"或"剎車系統原理"就知道，本篇文章針對小客車為主，平時要養成良好開車習慣，千萬不要以為"拿到駕照"就等於"會開車"，緊急狀況處理要時常在腦中排演，才不會在真正遇到狀況時腦袋一片空白！

 

[Jay Tu]

I disagree with this article on a few points, especially on how to react to the emergency on a hilly road.  Just to let you know that I am sort of qualified because I teach a graduate level Advanced Vehicle Dynamic course and I pretty much fix my own cars, three 1994 Mercedes.

1. The brake will still work even if the engine stalls. You know that because you press your foot on the brake before starting.  It would be harder to push down the brake pedal but it will still work, as many times as you want.  In the junk yard, if I want to remove a wheel, I will ask someone to press down the brake pedal so that I can turn the bolts.  It still works, again, as many times as you want.

Keep your foot firmly on the brake. The vacuum assisted braking system (not all cars use this) help you to push down the brake pedal but the actual braking power comes from the brake fluid pressure which exists as long as you can hold down the brake pedal.  Therefore, DO NOT PANIC!!!  You can still brake with the same braking power.  Your ABS may not work so that your wheel may lock up and skid, making it dangerous.

 2. If you are moving uphill and your engine stops, the car will come to stop due to gravity.  Therefore, you should pull to side naturally and brake, without panic.  Once you stop, the car will stay.  The road friction is higher at stationary than those when moving.  You can then push the transmission to park and engage hand brake so that you can take off your foot.  I disagree with any of those panic moves to switch to hand brake immediately.  You will only wear out the hand brake.  Do not shift to park when the car is still moving.

3.  If it is down hill, yes, you brake and shift to lower gears to slow down the car.  You don't want any panic braking action because your steering wheel will be very stiff and hard to control the car direction when the engine stalls. Depending on your speed, you may not be able to stop the car if it comes down to a turn and the steering is hard.  It would be very dangerous.  Jumping out of the car is not an option, no time and dangerous.  You should try to hit the hill to stop the car, not letting the car fall off the cliff.  The seat belt and airbag probably can save your life if you hit the hill and stop.

Hopefully, with pressing down the foot hard and engaging lower gear, you can stop the car on the side.  Once you stop, push to park and pull up handbrake, walk out of the car.  Call for help.

4. Driving with lower gears on hilly roads may not be a good idea.  You will heat up your transmission and engine too much to promote failures.  Set it in D and drive within the speed limit.  For steep downhill, lower gear is good idea and keep the overall speed within the speed limit.  NEVER put the transmission to neutral while going down hill. 

I remember driving on Highway #1 in the south of SF once.  I drove slowly and very quickly cars were piling up behind me.  I had to pull over many times to let those cars pass.  Speed can kill.  Therefore, avoid exceeding the speed limit.

These are just my opinions for your reference and I don't assume any liability for sharing my opinions.  However, this article on BATA is wrong on several points.  

Jay Tu 

--
This is the Bay Area Taiwanese American E-Mail Group. Our main objective is to provide open communication channel for the Taiwanese American community, let the Taiwan Spirit grow and pass down to the future.
 
To browse all the posted messages online, please visit our website at:
http://groups.google.com/group/bay-area-taiwanese-american?hl=en?hl=zh-TW
 
To post messages to our group, please send email to
bay-area-taiw...@googlegroups.com
 
To unsubscribe from our group, send email to
bay-area-taiwanese-...@googlegroups.com
---
您已訂閱「Google 網上論壇」的「Bay Area Taiwanese American」群組，因此我們特別傳送這封郵件通知您。
如要取消訂閱這個群組並停止接收來自這個群組的郵件，請傳送電子郵件到 bay-area-taiwanese-...@googlegroups.com。
請前往以下網址造訪這個群組：http://groups.google.com/group/bay-area-taiwanese-american。
如需更多選項，請前往：https://groups.google.com/groups/opt_out。

[Allen Kuo]

Thank you Jay. It is nice to hear an insider's opinion from the professor who teaches Manufacturing Processes and Analysis for Mechanical Engineering Design, and has studied the high speed machining/spindle technology frequently.

 

In the past 5 years, the Bay Area Taiwanese American community (and the other areas as well) have had so many families that have experienced car accidents. Some of these accidents might have been caused by the mechanical failure as mentioned. So please pay attention to these kind of articles.

 

Allen Kuo