[轉載] 九巴三軸 Volvo B9TL (Gemini 2 車身) 在英國, 等船中

原帖由 sutrak 於 2010-2-25 18:27 發表
就個人而言, 一開始其實我好討厭ISLe 呢副引擎, 扭力o黎得遲攪到起步慢, 又剩係識得死衝, 成日都要扯到盡晒, 冇ISMe o個種扎實,穩健但輕快而且踩極都未到頂o既感覺.

但係o係新加坡試完部宇通同埋香港o既E400 之後, 我覺得ISLe 係唔錯, 尤其係E400, 行606 時上柴斜時完全係可以用輕鬆o黎形容

It's hard to fault that on ADL's perspective though. These days, the trend is to use a smaller, but turbo-charged engine to achieve better fuel economy whilst putting out the same power. Just think about it - in the old days a Metrobus/Olympian needs an 11L engine, but now on a heavier UK-spec E400 the engine has shrunk to about half of that size, with the 5.9L ISBe engine.

The downside is turbo-lag, esp. if the engine relies more from the turbo to get more power - which is why you feel it's a bit slower than the ISM I supposed. The E400(HK) of course should do well - as I said before, it power-to-weight ratio, depending on load, is 10-25% better than the E500.

a396: I'd like to think the problem is just dodgy sensors and programming in the engine management systems. With quite a lot fo computers and electronics sitting at the back of current generation of engines these days, these kind of "faults" are bound to be common. It should be teething problem, and in time, will only take Cummins to do some EMS software upgrade to rectify that.

on11358: No need to say sorry, I don't even knew who's started it! The blind I guess is just a coincidence, considering we have only seen 2 of the batch so far...

S3N92: Chill. You get sensationalists everywhere these days.

原帖由 NV58 於 2010-2-26 03:13 發表
It's hard to fault that on ADL's perspective though. These days, the trend is to use a smaller, but turbo-charged engine to achieve better fuel economy whilst putting out the same power. Just think about it - in the old days a Metrobus/Olympian needs an 11L engine, but now on a heavier UK-spec E400 the engine has shrunk to about half of that size, with the 5.9L ISBe engine.. E% N! u+ U& A
9 L! y- G% _2 y; K+ W7 R( D
The downside is turbo-lag, esp. if the engine relies more from the turbo to get more power - which is why you feel it's a bit slower than the ISM I supposed. The E400(HK) of course should do well - as I said before, it power-to-weight ratio, depending on load, is 10-25% better than the E500.

英國E400 如果冇記錯應該係用6.7L ISBe, 但係我有時都會諗究竟用細容積引擎係唔係真係慳到油. 眼見富豪同 Scania 睇齊用番9公升引擎, 會唔會係一D暗示?

不過我唔會怪ADL, 因為佢似係冇得揀多D, 由Euro IV 開始, Cummins 就唔再出ISCe 同ISMe, 冇乜其他選擇下只好揀ISBe 同ISLe

原帖由 sutrak 於 2010-2-25 20:08 發表


英國E400 如果冇記錯應該係用6.7L ISBe, 但係我有時都會諗究竟用細容積引擎係唔係真係慳到油. 眼見富豪同 Scania 睇齊用番9公升引擎, 會唔會係一D暗示?

不不過我唔會怪ADL, 因為佢似係冇得揀多D, 由Euro IV 開始, Cummins 就唔再出ISCe 同ISMe, 冇乜其他選擇下只好揀ISBe 同ISLe

Well, Scania sticks with the 9L engine for commonality across it's bus range. Volvo tried the D7 engine on the B7TL. It works, but a number of operators prefer a bigger engine instead and I guess, along with the adding benefit of having the same engine on the tri-axle product, is what drives Volvo to move on to the B9TL.

As I said, the trend is using a smaller turbocharged engine to do the job nowadays because, in theory, they are more economical than a bigger contemporary. However, engine size is not a reliable indicator in the real world - Say a B7TL, with a 7.3L engine, is more economical than both the Trident (8.3L ISC) and the E400 (6.7L ISB - you are correct on the engine size btw) under similar operational conditions. Even the good old Gardner, being much bigger, are reputed to be ruthlessly more economical on fuel than any of the above by a massive margin.

I guess with Cummins as it's major engine supplier, the choices aren't much for ADL really. But looking at the engine selection of current ADL products, they obviously think smaller engines are the way forward.

[ 本帖最後由 NV58 於 2010-2-26 00:10 編輯 ]

原帖由 sutrak 於 2010-2-26 02:27 發表


我又覺得樣辦車好難同量產車比較o既

就個人而言, 一開始其實我好討厭ISLe 呢副引擎, 扭力o黎得遲攪到起步慢, 又剩係識得死衝, 成日都要扯到盡晒, 冇ISMe o個種扎實,穩健但輕快而且踩極都未到頂o既感覺.

但係o係 ...

就搵返樣版比較丫....暫時眼見出車最多係MF5119..
AVD1---> ATEU1 ---> ASU1 ---> ASU2.....
ISLe 一樣可以好輕鬆上大斜...
我坐PC7486 @A41 上象鼻山路....一樣可以5 波好輕鬆咁上....
ISLe 起步冇ISMe 咁快....係始終cc ISLe比ISMe 細....
所以ISLe 較笠...

原帖由 NV58 於 2010-2-25 02:59 發表


Not sure about the order for the ATEUs, but I am hugely suspicious about the B9TL/MCV "order". I think somewhere people got confused with the upcoming B9TL/MCV demonstrator due for Go Ahead London i ...

你講完有B9TL+MCV樣版比 Go Ahead 後,
反而覺得九巴用MCV B9的料仲真添......

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