|
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A***n
发帖数: 8859 | 3 brake that hard? or transmission not downshifting fast enough? |
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l***x
发帖数: 684 | 5 if your car has manual option, try to downshift manually in this case.
will have a big jump on torque. |
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j******o
发帖数: 1788 | 6 does it jerk, esp. downshifting from 3rd to 2nd gear? felt it on both q5 and
a4, 2.0t tho, not sure about 3.0 |
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e*t
发帖数: 130 | 7 谢谢分享，很高兴知道你在开这款车。我研究了Forester Manual很久了，有几个问题
想请教一下：
1. 耗油真的是 22 City / 25 Combined / 29 Highway?
2. 烧机油真的很严重吗？你大约开多少英里后需要加机油？
3. 手排档的性能如何？是像网上说的那样吗？"The six-speed manual is geared
well enough so that getting going isn't a problem, but passing maneuvers at
highway speeds require a six-three downshift in order to avoid holding up
traffic in the fast lane, since the engine doesn't seem to make any real
power until it's revved above 3000 rpm. The shifter itself is your typical
notchy Subaru shifter... 阅读全帖 |
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s*********0
发帖数: 2045 | 8 Yes. Q50 trans are much smoother and pick up faster when I drived it. It now
feels like a proper sports car.
G37's 7-speed is very slow unless you floor it and have to wait half a
second for it to downshift. A bad compromise in an attempt for better mpg (
in vain).
Still like my 5-speed in the G35. I can say the Q50 trans is fast and
aggressive like the G35, but without the jerkiness. I think lot of people on
forums agree with me that Q50 drives better than G37, as long as you don't
get the new ... 阅读全帖 |
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s*****8
发帖数: 606 | 9 Bought the 2014 GC almost 2 years. My comments
Pros
- Very stable driving in the snow/rain
- Good off-road ability (no comparison, but able to handle very terrain
for daily drive)
Cons
- Steering wheel too soft, and need to turn more to compensate the turns
compared with other cars
- Air suspension, very soft, I feel lateral body roll is not too bad, but
nod/squat when brake/accurate is not fun. Compared with my other two
roadsters, I have to drive it completely different.
- Rear ... 阅读全帖 |
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s********u
发帖数: 1109 | 10 No big issue.Jerks at slow speed when upshift/downshift (automatic
transmission). Dealer took a look and reprogrammed, everything's fine now.
Just some configuration issue i suppose. |
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n**x
发帖数: 1898 | 11 如果设计自动downshift, 转速提高是正常的。这个设计的目的是减少刹车使用。但是
加速就有问题了。
重启才减速是什么意思？ |
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r***i
发帖数: 9780 | 12 起步狠踩油门，发动机转速到3k
然后再从容换档
换档时机是看车速和发动机转速对应的
车速不到或者过快，发动机转速过高或者过低，你换档就会jerky，慢慢摸索吧
另外downshift是必须的，尽量比踩着离合跑，也是根据车速和发动机转速确定，一般
最佳换档转速在2000-2500之间，开熟了，可以自己任意调节换档时机 |
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s*m
发帖数: 1896 | 13 1升2就是要慢，要等到转速降下来
低档downshift肯定要rev match，不过6到5或者5到4有时候不需要，或者只需要很轻的
rev一下 |
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c**2
发帖数: 8496 | 14 transmission won't downshift?
If transmission seems fine, then it's the engine (big problem). engine wall
is worn or pistons not really sealed (also due to worn), either a very old
car, or the owner did not keep enough oil level for a prolonged period of
time so engine parts are worn and can't output strong enough to climb. no
cheap solution and need a rebuilt engine replacement. Don't drive your car
on very low engine oil. |
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W***n
发帖数: 11530 | 15 auto:
apply brake -> stop -> Park
manual:
apply brake -> (... downshift if necessary) -> almost stop -> apply clutch -
> stop -> Park |
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b****l
发帖数: 97 | 16 那个6速配自吸换挡没有配turbo的顺滑，torque 不够换挡反应挺慢的，而且随便上个
坡就要downshift。2.7的是福特最好的turbo V6 高速油耗低，比起3.7的油耗基本没多
多少。 |
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l*****6
发帖数: 7881 | 17 你不会不知道DI的引擎大脚油门高转速根本不能防止积碳吧。因为fuel是直接喷到缸里
的，根本不经过intake valve。非DI的引擎(port injection)确实可以通过大脚油门
来清洗valve和port.
那哥们拉高速之后觉得车轻快了，很可能是因为改变了变速箱的programming， 更加积
极的downshift了。
防止DI引擎积碳有几种方式，第一是勤换spark plug, 每四万迈换一次。第二是要保证
fuel injector clean。 第三是加别用低档油。第四是更新到最新的ECM软件。
: 本来买车是为了随便操，这个感觉是买了之后每月要定期被车操。。。
|
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e*******e
发帖数: 9616 | 18 True Love all the way
"Our Pilot suffered no major mechanical defects, save for the well-
documented replacement of the nine-speed transmission at 21,428 miles. To be
clear, this ZF transmission, an upgrade option over the six-speed automatic
, was replaced under warranty as a preventative measure after we heard noisy
clicks and whirrs during upshifts.
The replacement served us well through another 20,000-plus miles, but we’re
still not fans. It’s great for cruising on the highway, but the nine-... 阅读全帖 |
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e*******e
发帖数: 9616 | 19 大名鼎鼎的motortrend试驾，本来准备写5星好评的，结果刚过两万mile ZF-9就挂了，
还有比这更尴尬的吗？结果评论还被disabled了，哈哈。
"Our Pilot suffered no major mechanical defects, save for the well-
documented replacement of the nine-speed transmission at 21,428 miles. To be
clear, this ZF transmission, an upgrade option over the six-speed automatic
, was replaced under warranty as a preventative measure after we heard noisy
clicks and whirrs during upshifts."
The replacement served us well through another 20,000-plus miles, but we’re
still not f... 阅读全帖 |
|
发帖数: 1 | 20 本田一定会说这是供应商坑它。奇怪，供应商怎么总坑本田？怎么不坑丰田？之前骂
jatco 现在骂ZF，别人都错了，本田一贯正确永远正确？
[在 eightmile (红脖子的言行liberal的心) 的大作中提到：]
:大名鼎鼎的motortrend试驾，本来准备写5星好评的，结果刚过两万mile ZF-9就挂了
，还有比这更尴尬的吗？结果评论还被disabled了，哈哈。
:"Our Pilot suffered no major mechanical defects, save for the well-
:documented replacement of the nine-speed transmission at 21,428 miles. To
be clear, this ZF transmission, an upgrade option over the six-speed
automatic, was replaced under warranty as a preventative measure after we
heard noisy clicks a... 阅读全帖 |
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e*******e
发帖数: 9616 | 21 大名鼎鼎的motortrend官方试驾，本来准备写5星好评的，结果刚过两万mile ZF-9就挂
了，还有比这更尴尬的吗？结果评论还被disabled了，哈哈。
我记得一个评论说有没搞错，2万mile换变速箱还给四星？另一个白妞评论直接说：
Toyota all the way...
"Our Pilot suffered no major mechanical defects, save for the well-
documented replacement of the nine-speed transmission at 21,428 miles. To be
clear, this ZF transmission, an upgrade option over the six-speed automatic
, was replaced under warranty as a preventative measure after we heard noisy
clicks and whirrs during upshifts."
The replacement served ... 阅读全帖 |
|
发帖数: 1 | 22 尴尬，但不用慌。小二可以把局面口回来。
[在 eightmile (红脖子的言行liberal的心) 的大作中提到：]
:大名鼎鼎的motortrend官方试驾，本来准备写5星好评的，结果刚过两万mile ZF-9就
挂了，还有比这更尴尬的吗？结果评论还被disabled了，哈哈。
:我记得一个评论说有没搞错，2万mile换变速箱还给四星？另一个白妞评论直接说：
:Toyota all the way...
:"Our Pilot suffered no major mechanical defects, save for the well-
:documented replacement of the nine-speed transmission at 21,428 miles. To
be clear, this ZF transmission, an upgrade option over the six-speed
automatic, was replaced under warranty as a preventative measure after we
he... 阅读全帖 |
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H*****u
发帖数: 1766 | 23 小六这个例子我以前见过, 是Kia Sorento. 网上有一些讨论, 有人说Kia调查后无法复
制, 我没有找到正式报告, 也没有兴趣确定是不是电子油门的问题。我个人的猜测(无
法证实)说换空档DIDN'T WORK的最大可能是driver panic, driver是一位47岁的大妈。
我前面提到过对Jeffrey Pepski案例的不同版本的报道,提到了'didn't work'这个说法
很含糊。到底是无法切换到, 切换了停不下来, 还是切换了降低不了发动机rpm? 小六
猜测的'自动加速时换到N档不起作用'意思是第二第三情况。
进一步考证一下, 网上有引用她的原话是'I can't get it to move. I can't get the
car to shut off'。就是说这位47岁的大妈当时无法physically把档杆推到n档(我没
查这款车有没有档杆)。所以我认为最大的可能是driver panic.
坦白说, 我开原来那款车时mentally和physically训练过在行进中换空档, 包括在踩油
门的同时换空档。因为即使我这种自认为比较冷静的,对车有一定了... 阅读全帖 |
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m******t
发帖数: 165 | 24 Thursday, the IMF released a report named World Economic Outlook.
Its analytic chapter says that the recent spike in oil prices suggest
that the global oil market has entered a period of increased scarcity.
According to the report, the origins of this scarcity can be traced to
the tension between the upward shift in global oil consumption growth
due to fast-growing emerging market economies and supply constraints,
which have led to a downshift in oil supply growth.
The report notes that scarc... 阅读全帖 |
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s**********2
发帖数: 305 | 25 你好，我在积攒审稿，麻烦帮忙推荐。
我是材料物理，做的半导体纳米材料制备，比较符合我的背景。
谢谢了。
Interested in serving as a reviewer
1. My background
2. Keywords
3. Published journals and paper I have reviewed.
4. Thanks.
Dear Editor,
I graduated from Nanoelectronics Lab at University of Wyoming in 2014 and
hold a Ph.D. degree in Physics (Materials and Electronics). I got my
bachelor degree in Jilin University in 2009, one of the top 10 universities
in China. My name is Liyou Lu and I am currently a product/test engineer at
Fre... 阅读全帖 |
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m****r
发帖数: 6639 | 26 hehe. i also think that to get more power(torque?), you need to downshift.
so, to me, the phrase should be they can't always be in first gear. |
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V*****n
发帖数: 893 | 27 got screwed by blazing saddle today. Rented their tandem bike but the limit
screws on the rear derailleur was not properly adjusted. so the derailleur
went into the spokes in a downshift. and they charged us $40 for it in
addition to a full day rental charge despite the bike worked only for 2
hours. It ruined the whole day for us. I can not believe it. any regulatory
places I can file a complain? and any news paper I can write to to report it
.
BTW: just as we were dealing with it at the rental |
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O****e
发帖数: 3290 | 28 本人骑车多年，对摆弄自行车却一直兴趣不大，除了换车胎之类的简单而又必须自己会
的活，车子的维修与保养基本上都是拉到车店去做。没想到前两天自己动手换了Front
Derailleur，既省了钱又满足了小小的虚荣心，跟大家分享一下。
Front Derailleur (Ultegra 6600) downshift 出了问题，本来以为拖到车行调整一下
就可以了，车行的人看了半天说得换，告诉我部件有些变形，无法恢复原位。问得多少
钱，进去查了半天，回来说6600是老型号，店里只有6700，$80，不能保证与6600的
Rear Derailleur配，出了问题无法保修。问我愿不愿意等他们从别的地方定购6600，
我问得要多久，回答说得要一两个星期，虽然觉得久了点，可附近只有这一家店，还是
把车留下了，让他们回头打电话告诉我具体订购价格和到货时间。回家后在网上查了下
，想看看他们的开价是否太离谱，一查，6600网上$40就能买到。刚查好，店里的电话
也到了，告诉我6600价格还要贵点，$90外加$10邮费，安装费是$30。我一听马上问我
自己定购部件，让他们装，行不行，回答说，可以，但安装费得 |
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V*****n
发帖数: 893 | 29 upshift and each of the downshift (up to 3 a time) all have clearly
identifiable clicks. |
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R*****s
发帖数: 41236 | 30 今儿又调了调，发现cross chain的时候好像总是会擦到，
看了下PB上的这篇文章，说实际上shimano STI levers
有3个position, 如果在cross chain(大大，小小）的时候，
要把前变往回拨一点就好了：
http://learn.performancebike.com/bikes/advice/how-to-guides/bik
SHIMANO: Shimano 9- and 10-speed STI levers have three click positions. If
you find the chain to be rubbing, try depressing the downshift lever once.
This should 搕rimthe front derailleur, by moving it into a position midway
between the big and little rings, giving the chain more clearance.
SRAM的更惨，说cross chain的时候的r... 阅读全帖 |
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C*********p
发帖数: 213 | 31 I think I need that. My brain automatically downshifts the gear after 8-9
miles. Not tough enough |
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b*s
发帖数: 82482 | 32 进山去了。
在走山路的过程中，bos发现了engine braking的原理。惊奇地发现，automatic
transmission也可以downshift，也可以engine braking。在悬崖旁边开只有一条lane
的土路非常考验胆识……
然后，惊奇的发现，山顶的晚上是那么的黑，那么的静。没有cell phone coverage，
没有internet和TV的夜可以是那么的长。
笔记本电脑成了一个SD卡的backup machine，iPad除了看PDF也别无用处。唯一有百分
之百功能的就是nook……
褒姒今天肿么没来？ |
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b*s
发帖数: 82482 | 33 来自主题: LeisureTime版 - 就这样吧 详情如下：
Dear Tom and Ray: You lugheads -- and I mean that in a good way -- often
talk about the proper way to drive a manual transmission. Well, I have an
automatic and know nothing about shifting from "Drive" to "1" or "2" and
back. Those numbers aren't just for decoration, are they? Thanks for all the
laughs. -- Anne
Ray: Automatic transmissions are pretty much "set it and forget it" these
days, Anne; 99.9 percent of your forward driving can be done in "drive."
When the transmission needs to be ... 阅读全帖 |
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e**n
发帖数: 5876 | 34 你这个比喻不对. 手动档upshift downshift麻烦, 但加速速度不比自动档的慢.
你手动对焦不仅麻烦, 而且对焦速度能赶上0.1s的自动对焦? 速度赶不上, 想拍的拍
不到, 麻烦不麻烦反倒是次要的了. |
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S*********s
发帖数: 304 | 35 既然你做这么specific的实验，想必你在做protein S-glutathiolation的研究
可能的解释就是
GSH+GSH（+H2O2）->GSSG
Actin+GSSG->Actin-SSH
但有两个问题
1）你跑了Western,正常情况应该加了DTT,不应该看到modified actin
加DTT多煮煮，看看是否还在
另外，可以coincubate with IAA or IAM,do IEF，you should get more information
2) 一般来说band should go upshift, 但你看到了downshift,所以不敢肯定
这种情况时有发生
If it is really S-glutathiolation, you should go in vivo.
1)Check whether this modification happens under physiological and
pathological or drug treatment conditions.
2)Whether it is functional
Goo... 阅读全帖 |
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S*********s
发帖数: 304 | 36 既然你做这么specific的实验，想必你在做protein S-glutathiolation的研究
可能的解释就是
GSH+GSH（+H2O2）->GSSG
Actin+GSSG->Actin-SSH
但有两个问题
1）你跑了Western,正常情况应该加了DTT,不应该看到modified actin
加DTT多煮煮，看看是否还在
另外，可以coincubate with IAA or IAM,do IEF，you should get more information
2) 一般来说band should go upshift, 但你看到了downshift,所以不敢肯定
这种情况时有发生
If it is really S-glutathiolation, you should go in vivo.
1)Check whether this modification happens under physiological and
pathological or drug treatment conditions.
2)Whether it is functional
Goo... 阅读全帖 |
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S****n
发帖数: 95 | 37 according to your picture I think you can still control shifting by using
the handle (left downshift and right upshift),like sequential
and auto-manual) |
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y*******n
发帖数: 10103 | 38 您老开的这么生猛，我看downshift都是5直接到3，4直接到2，tranny肯定吃不住吧。 |
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l**********l
发帖数: 4468 | 39 谢谢，总结得不错。我现在只对1，2，5有认识。3我的车干不了，我看到rx8，s2000，
还有miata downshift到一档都没问题，很普遍。但是我的tranny不喜欢行进中挂一档
，基本就是锁住了，要费好大劲才能勉强推进去。你们很幸福啊，每个人上午可以开下
午还能开？我们就是分两个大组要不就上午开下午工作，要不就反过来。没很多时间给
你总结。所以我一般喜欢下午开，上午工作时候就看人家怎么开然后琢磨。
limit |
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a*********g
发帖数: 2853 | 40 Agree, that is the reason.
I do not double clutch or heel-toe, so there is no way to downshift to 1
with
out a synchro. Rev matching is the key.
车速 |
|
y*******n
发帖数: 10103 | 41 是用那个RR车吗？还是最后一关用F1？
反正超过OK难度的车子，然后跟在高手难度的车后面混就好了。那个RR车子，
downshift要做H&T，出弯要慢加油，是比较难控制的。 |
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s*******e
发帖数: 3042 | 42
恩，我后来发现很多这种拍卖车其实都没什么问题，是旧车trade in到新车dealer，新
车dealer懒得买就直接批发给拍卖场了。我记得原来NH是星期四拍卖，星期三可以提前
去看，可以检查，打火，但是不能试开。我翘班跑去了看过好几次，看到剧便宜的车，
不过那时候太穷不敢拿几千块冒险。
另外我觉得旧车保养得好不好，基本上打开hood看看，试开一下就能感觉个八九不离十
，如果再测一下缸压，把握就更大了。我现在唯一拿不准的就是不知道怎么检查auto
tranny的状况，saabnet有人教过一个power downshift的方法，不过我觉得也没什么科
学依据。 |
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p**s
发帖数: 408 | 43 上长坡降挡是肯定的， 不过如果上坡前已经75+ mph， no need to downshift at all
, plenty of power. no problem from LA to Las Vegas, 你说的一小段山路应该是I-
215 和I-15 merge后的 cajon pass,侧风还是很明显的。毕竟只是commuter car, 实用
，耐用是第一位的。 |
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b**********g
发帖数: 534 | 44 I push it to the manual shift, other than that I don't see any other
sport setting.
no feeling at all, also I am not very used to the push for downshift and
pull for upshift setting.
relatively speaking, the paddle shifter feels way better,
but the 5 doesn't come with paddle shifter. |
|
c**d
发帖数: 3888 | 45 If the RPM is near the redline (>5000), I would not downshift without
braking, auto or manual. |
|
f*******r
发帖数: 5301 | 46 今天有机会在雪山上试驾了BMW X3, twin turbo 300HP，8AT downshift很肉，一脚下
去先看着转速爬上去，然后呜一下爆发，直线加速不看速度表不知道过100（千万不能
给老婆买这个）。限速35mph的山路不敢试车的极限，总之驾驶感觉跟小车差不多，左
扭右扭反应很灵敏。
试驾最有趣的是滑雪场前面有个停车场，里面有一大块地全是冰雪，我偷偷上去体验了
一把X-Drive AWD。跟一般的on-demand awd最大不同是x-drive本质是个后驱车，基本
保持了后驱车的一切操控特性，唯一区别是打滑时前轮动力介入。
这个AWD对于脱困确实有效，冰上面刷刷刷的就开过去了，只要踩油门，保证车能往前
动。不过车总是有要斜过来的趋势，要不停的counter steer, 小幅度蛇形前进。。尽
管如此，这个反打方向修正过程的可控性很好，应该是前轮有动力的原因。总之，这个
AWD很有意思，保持了后驱的乐趣但是又降低了危险性。
没找着有冰的大坡实验，是个遗憾。
试驾完BMW我又开着FJ到那个停车场，连4 high lock都没开，轰轰轰的走直线就开过去
了。。十分无趣 |
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y***k
发帖数: 9459 | 47 这车用的是700-R4变速箱，有设计缺陷，throttle valve inside the transmission
时间长了会卡住，导致upshift和downshift延迟甚至不能进行。你试试flush一下变速
箱。 |
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v*****a
发帖数: 1332 | 48 我没太明白，继续请教啊。
我没想通的地方：当踩下油门，动力往后传，rpm升到3k左右的时候
突然，“钪”一声响。然后感觉动力的传输就松开了。rpm掉到1k
这个现象是upshift和downshift问题的表现形式么？
拜谢 |
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i****x
发帖数: 17565 | 49 你这个是推背感，跟我所说顿挫感方向是反的。
我指的是因为降档，发动机转速被车速和齿轮比拉高，反过来造成刹车的感觉。如果降
档不补油应该会有这种现象。dsg这样的双离合系统肯定有自动补油的。wiki介绍如下：
Downshifting is similar to upshifting but in reverse order, and is slower,
at 600 milliseconds, due to the engine's Electronic Control Unit, or ECU,
needing to 'blip' the throttle, so that the engine crankshaft speed can
match the appropriate gear shaft speed.[2][4] |
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