d******g
发帖数: 6966 | 1 BMW announces a base price of $37,625 for the all-new BMW X3 Sports Activity
Vehicle®, which arrives in dealer showrooms by the end of the year.
That is the Manufacturer’s Suggested Retail Price for the refined, 240-
horsepower X3 xDrive28i. The turbocharged, 300-horsepower X3 xDrive35i will
have an MSRP of $41,925. Both prices include $875 Destination & Handling fee
. Both models feature a standard 8-speed automatic transmission and BMW’s
acclaimed xDrive intelligent all-wheel drive system... 阅读全帖 |
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d******g
发帖数: 6966 | 2 有的
"Good thing, then, that the majority of changes made to the C-Class are
found underhood, where Mercedes-Benz is offering an all-new four-
cylinder
engine option here in the United States (as well as a new model
designation – C250), not to mention some tweaks for the V6 found in the
top-end C350."
"The C250 is powered by a new twin-turbocharged, direct-injection four-
cylinder engine delivering 201 horsepower and 229 pound-feet of torque.
The C300 4Matic features a 228-hp V6 with 221 lb-ft of ... 阅读全帖 |
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d******g
发帖数: 6966 | 3 http://www.insideline.com/nissan/gt-r/2012/2012-nissan-gt-r-ful
Vehicle Tested:
2012 Nissan GT-R Black Edition
Base Price:
$95,100
Price as Tested:
$96,100
Engine:
3.8-liter V6, twin-turbocharged and intercooled
Gearbox:
Six-speed dual-clutch automanual
Power:
530 hp
0-60 mph:
3.1 seconds
Fuel Mileage:
16 city/23 highway/19 combined
What Works (pros):
Fully engaging, insane power, ludicrous speed, (relatively) easy to drive
What Needs Work (cons):
Still a bit stiff for a daily driver.
Bottom Lin... 阅读全帖 |
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f********m
发帖数: 8397 | 4 http://www.autoblog.com/2011/02/21/2012-fisker-karma-first-driv
road-test/
Hollywood, Your Plug-In Hybrid Electric Has Arrived
2012 Fisker Karma – Click above for high-res image gallery
Business partners Henrik Fisker and Bernhard Koehler are visibly on
edge. While they want to dedicate every ounce of their focus on this
all-important launch of their first baby, the 2012 Fisker Karma, their
attentions are being constantly pulled away from it by big conference
calls regarding the money and logist... 阅读全帖 |
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t*a
发帖数: 18880 | 5 小A4?
Naturally, we're just as interested in the five-cylinder engine that uses
turbocharging and FSI to pump out 408 horsepower. Peak torque measures 368
pound feet, and all that power is available between 1,600 and 5,300 rpm.
Audi claims its A3 concept can hit 62 mph in 4.1 seconds and is
electronically governed to a top speed of 155 mph. Impressively fuel mileage
is estimated at 25.85 U.S. miles per gallon.
这些数据好像... 生猛点？ 5缸发动机？基于2.5L那个？ |
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L*A
发帖数: 756 | 6 off road 低速扭矩最重要，比如说这个 Massey Ferguson 8480 只有290hp:
(8.4 L, 6 cylinders, 290 hp diesel turbocharged intercooled)
475 hp 用来干吗？提高极速？重心这么高打满把三十几mph就翻了吧？
6.
SRT
60
the
an |
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s*******e
发帖数: 1298 | 7 turbocharger只要发动车子就转，只不过增压压力不同，效率不同罢了。 |
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b*******s
发帖数: 2279 | 8 2.0T的发动机，274/269，价格和GTI差不多，不过数据好很多了。
http://www.caranddriver.com/reviews/car/11q2/2011_kia_optima_sx
ESTIMATED PRICE AS TESTED: $30,840 (base price: $26,690)
ENGINE TYPE: turbocharged and intercooled DOHC 16-valve inline-4, aluminum
block and head,
direct fuel injection
Displacement: 122 cu in, 1998 cc
Power (SAE net): 274 hp @ 6000 rpm
Torque (SAE net): 269 lb-ft @ 1750 rpm
TRANSMISSION: 6-speed automatic with manual shifting mode
DIMENSIONS:
Wheelbase: 110.0 in Length: 190.7 in
Width: 72.1 in ... 阅读全帖 |
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p*********e
发帖数: 32207 | 9 现成的turbocharging在那儿,为啥还要拆掉换SC呢?
难以理解啊. |
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y********r
发帖数: 2836 | 10 correction: s5 couple is 3.0T v6, turbocharged not supercharged. cabriolet
is still supercharged v6. |
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y********r
发帖数: 2836 | 11 ah? this is from what I read:
"the 2012 Audi S5 coupe will move to a 3.0L V6 TFSI power plant producing
245kW (333PS) - Audi specifies this is a turbocharged engine - not the
supercharged version currently found in the 2011 S5 Cabriolet. The other
major change under the bonnet is the introduction of stop-start technology
for better fuel efficiency. Audi claims an average fuel economy of 8.9
litres/100km (compared to the current 12.6 litres/100km in the V8 coupe and
10.7 litres/100km in the Cabri... 阅读全帖 |
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c*********r
发帖数: 19468 | 12 如果是turbocharged，我死在当场，你选地方…… |
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y********r
发帖数: 2836 | 13 haha, be cool. I got confused by dealer's email since it doesn't say
turbocharged or supercharged. then i was misled by an unreliable resource :D |
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D*******a
发帖数: 3688 | 14 Just curious, is there any car that uses supercharger+turbocharger combo? |
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W*******2
发帖数: 1460 | 15
著名的大众TSI不就是双增压么~supercharger+turbocharger |
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b*******s
发帖数: 2279 | 16 看了一下配置都还很不错, 价格比GTI还厚道. 准备买了给LP开.
Entertainment
AM/FM stereo -inc: (8) speakers, aux input
Bluetooth connectivity
Media device interface (MDI) w/iPod cable
The features and options listed are for the 2012 Volkswagen Beetle 2dr Cpe
DSG 2.0T Black Turbo Launch Edition PZEV and may not apply to this specific
vehicle.
Exterior
19" "Tornado" alloy wheels
235/40R19 all-season tires
Rear spoiler
Front fog lights
Black heated pwr mirrors
Intermittent windshield wipers
Heated washer nozzles
Unique side d... 阅读全帖 |
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d******g
发帖数: 6966 | 17 http://www.f30post.com/forums/showthread.php?t=592042
As we've been alluding to, the 2012 F30 3 series will be revealed mid-next
month (Friday, October 14 to be exact) via online reveal, and live at a BMW
press event. Autobild has posted the engine range that will be available for
the F30 at launch, as follows:
Gasoline:
316i - 134hp
320i - 181hp
325i - 218hp (likely to come later)
328i - 242hp (2.0L inline 4 cylinder twinpower turbo N20 motor) (US bound)
335i - 302hp (3.0L inline 6 cylinder twi... 阅读全帖 |
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p*********e
发帖数: 32207 | 18 不是切断或者不切断的问题
你可以考虑一下引擎的输出是如何控制的
在一个特定转数下,输出功率取决于输出扭矩
而后者取决于有多少混合汽参与做功
而对于一个进排气等等参数已经固定的引擎
如果我们简单点儿不考虑稀燃的情况,也就是说空燃比固定
进一步输出取决于压缩冲程开始时缸内的混合汽气压
我们搞turbocharging也好,supercharging也罢,都是在 需要的时候 ,让这个气压
可以提高到比方说1个大气压以上
而反过来na机就算节气门全开,大概也就是0.9几的最好表现
问题就是,上面说了,是需要的时候.
当我们在高速巡航的时候,根据车型的不同,很可能我们需要的功率只是几十匹
而对应一个经济转数,比如2500rpm下,我们所对应需要的扭矩也只有峰值扭矩
的几分之一
也就是说,在这种工况下,气缸内混合汽压强无论如何都处在低于标准大气压以下
也就谈不上增压了.
换句话说,这时候引擎的状态,基本等同于一部na引擎.
当然,这个工况下废气涡轮和增压器是否在工作,就看具体的引擎控制逻辑了
你可能通过bypass valve彻底让废气绕开涡轮直接排放
也可能为了减少turbolag让上述两者仍在... 阅读全帖 |
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p*********e
发帖数: 32207 | 19 你需要意识到的一点是
当我们看一个工况图的时候
那给出的是满油门满负荷输出时可以达到的扭矩及功率关于转数的曲线
实际上turbocharger随时都可以启动
但因为对排气压力有依赖,尤其是高增压的机器,只有当转速超过一个最低值
才能够达到峰值的扭矩输出.
这却并不等于在这个转速或者以上增压器就无时无刻不运转了. |
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p*********e
发帖数: 32207 | 20 不是切断或者不切断的问题
你可以考虑一下引擎的输出是如何控制的
在一个特定转数下,输出功率取决于输出扭矩
而后者取决于有多少混合汽参与做功
而对于一个进排气等等参数已经固定的引擎
如果我们简单点儿不考虑稀燃的情况,也就是说空燃比固定
进一步输出取决于压缩冲程开始时缸内的混合汽气压
我们搞turbocharging也好,supercharging也罢,都是在 需要的时候 ,让这个气压
可以提高到比方说1个大气压以上
而反过来na机就算节气门全开,大概也就是0.9几的最好表现
问题就是,上面说了,是需要的时候.
当我们在高速巡航的时候,根据车型的不同,很可能我们需要的功率只是几十匹
而对应一个经济转数,比如2500rpm下,我们所对应需要的扭矩也只有峰值扭矩
的几分之一
也就是说,在这种工况下,气缸内混合汽压强无论如何都处在低于标准大气压以下
也就谈不上增压了.
换句话说,这时候引擎的状态,基本等同于一部na引擎.
当然,这个工况下废气涡轮和增压器是否在工作,就看具体的引擎控制逻辑了
你可能通过bypass valve彻底让废气绕开涡轮直接排放
也可能为了减少turbolag让上述两者仍在... 阅读全帖 |
|
p*********e
发帖数: 32207 | 21 你需要意识到的一点是
当我们看一个工况图的时候
那给出的是满油门满负荷输出时可以达到的扭矩及功率关于转数的曲线
实际上turbocharger随时都可以启动
但因为对排气压力有依赖,尤其是高增压的机器,只有当转速超过一个最低值
才能够达到峰值的扭矩输出.
这却并不等于在这个转速或者以上增压器就无时无刻不运转了. |
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t*a
发帖数: 18880 | 22 http://manufacturing.automotive-business-review.com/news/kia-un
Kia unveils new Track’ster concept at 2012 Chicago auto show
ABR Staff Writer Published 09 February 2012
South Korean automaker Kia motors’ US subsidiary Kia Motor America has
unveiled the three-door Track’ster concept at the 2012 Chicago auto show in
US.
Track'ster concept car is powered by a 250hp 2.0-litre turbocharged in-line-
four engine mated to a six-speed manual transmission and also powers all
four wheels through an electro... 阅读全帖 |
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d******g
发帖数: 6966 | 23 "But all that extra torque isn't nearly as controllable coming from the
turbos. This may be the only downside when compared with the V-10. While the
naturally aspirated engine seemed to have a direct physical connection from
the driver's ankle to the car's 10 individual throttle bodies, the
turbocharged V-8 is a little more of a game of telephone. Push down on the
throttle pedal, feed the engine a bit more air, wait for the turbos to spool
, and then get ready to counter steer. The impatient wil... 阅读全帖 |
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V***b
发帖数: 3419 | 24 这就看出turbocharge比supercharge的优越性了，至少不会掉这么多。 |
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d******g
发帖数: 6966 | 25 你想说的是turbocharge和supercharge比na的优越性吧 |
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s*******e
发帖数: 1298 | 26 turbocharger的高海拔适应性是supercharger和na没法比拟的。 |
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S***x
发帖数: 2012 | 27 0-60, 6.1s, mpg 25/35, 2.0 turbocharge. 看Motor Trend上的评价不错呀。 |
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k**********i
发帖数: 8706 | 28 The Focus ST has officially been added to Ford's configurator.
http://bp3.ford.com/2013-Ford-Focus-ST#/Models/
EcoBoost 2.0-liter turbocharged four-cylinder engine good for a whopping 252 horsepower and 270 pound-feet of torque
Quote:
"The entry price puts the Focus ST well below fellow front-drive competitors like the Volkswagen GTI and Mazdaspeed3, but within spitting distance of playful hardware like the Toyobaru twins and the all-wheel drive Subaru WRX. Suddenly, it appears we live in a worl... 阅读全帖 |
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c*********r
发帖数: 19468 | 29 a centrifugal supercharger would make the engine very peaky. if I wanna
maximize the gain from FI, I'd rather go for turbocharging. otherwise I'll
stick to NA.
BRZ's engine block should still have a lot of room for a larger bore. and
VVL is gonna help achieve a higher red-line. both should be good, but the
problem is the DI head is designed by Toyota. these modifications will
require a major overhaul for the head, which means a lot of engineering (
read: money). do you really expect Toyota's gon... 阅读全帖 |
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c*********r
发帖数: 19468 | 31 I don't think Nissan will change the VR38DETT that much. VVT on exhaust
valves won't help forced induction engines too much anyway. Actually, most
of Porsche's engines don't have VVT on the exhaust side either.
On the other hand, I do see the benefit Nissan's VVEL can bring to the
VR38DETT. It'll work in a way like the individual throttles of the RB26DETT.
But that'll be too much for the R35. Similarly, you don't expect DI to be
added soon.
The only improvement that is practical and significant ... 阅读全帖 |
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c******n
发帖数: 4965 | 32 got it started with starter fluid, seems working now, ordered gasket
package, sealed fuel tank
it was a lot of fun
this thing is really sturdy, simple and reliable as a rock
anybody know of a cheap turbocharger <20$? for a 6.5hp engine? |
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d******e
发帖数: 7844 | 33 The Mini John Cooper Works WRC is a World Rally Car debuted by the Mini WRC
Team during the 2011 World Rally Championship season. It is the first rally
car to bear the Mini label in top-level rallying since the 1960s.[2] The car
was entered in a limited campaign for 2011, with a view to a complete
championship from 2012 and is run by Prodrive,[3] who previously had success
with the Subaru Impreza WRC.
The WRC is based on the Mini Countryman and features a direct injection 1.6
L turbocharged inli... 阅读全帖 |
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d******e
发帖数: 7844 | 34 Supercharged没有Lag，但是TDI不是Turbocharged么？
Turbochanged Direct Injection，不是这三个词的缩写么？ |
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V***b
发帖数: 3419 | 35 还是turbocharger更好吧，奥迪选择supercharger可能是因为supercharger可以放在90
度的V中间，体积小，要说日后的马力提升还是宝马的3.0T更有潜力。利用废弃能量增
压理论上也效率更高。过去几代S4奥迪从2.7T，到4.2NA，再到3.0S，换来换去，还是
挺纠结的。不过这个3.0S真是很牛b。
twin |
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C**T
发帖数: 5379 | 36 0-60 in 3.6 seconds
http://www.autoblog.com/2013/01/10/mercedes-benz-e63-amg-gains-
Ladies and gentlemen, allow us to introduce the 2014 Mercedes-Benz E63 AMG
4Matic in both sedan and wagon variants. It's best to get right to business,
that being the numbers produced by the twin-turbocharged 5.5-liter V8
located in the engine bay of one of the fastest sedans in the world. The '
base' model gets a boost of 32 horsepower and 15 pound-feet of torque for a
final output of 550 hp and 531 lb-ft. A hig... 阅读全帖 |
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t*a
发帖数: 18880 | 37 www.motorauthority.com/news/1082689_2014-mercedes-benz-cla45-amg-coming-this
-november-stats-info
The CLA45 AMG has its powertrain in common with the A45 AMG. It's a 360-
horsepower, 332-pound-feet turbocharged 2.0-liter four-cylinder engine, a
seven-speed dual-clutch transmission, and all-wheel drive. In U.S. spec,
output will probably end up at about 355 hp. |
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l****o
发帖数: 832 | 38 还是3.7L v6和5.0L的V8。涡轮增压的I4是给欧版准备的。
传说中的IRS如期而至。新的平台S550据说重量更轻尺寸更小
http://wot.motortrend.com/spied-complete-2015-ford-mustang-test
As the Ford Mustang’s 50th anniversary draws nearer, work on the vehicle
that will help celebrate that milestone, the sixth-generation Mustang,
continues. After catching numerous early 2015 Mustang test mules late last
year, our spy photographer has caught what very well may be our first true
look at what the next-gen Mustang will look like.
The first thing that stands... 阅读全帖 |
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d******g
发帖数: 6966 | 39 GM跨越有点大啊...虽然数据差不多但价格直接开到和550,e550一个路数我没想到...毕
竟别人是八缸的而且e550标配四驱.
下一代ctsv看来是要80k朝上了
"but Cadillac did announce pricing for its top-tier CTS: the 2014 CTS Vsport
, which is fitted with a hot 420-hp, twin-turbocharged 3.6-liter V-6, an
eight-speed automatic, electronic limited-slip differential, and rear-wheel
drive. According to Cadillac, the 2014 CTS Vsport rings in at $59,995,
including destination."
http://wot.motortrend.com/2014-cadillac-cts-sedan-starts-at-460 |
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c**********9
发帖数: 135 | 40
有没有我也不够肯定。
我再看了看德文的新闻稿。
Die RS-spezifische Motorsteuerung und die entdrosselte Ansauganlage tragen
ebenfalls zum dynamischen Charakter des Biturbo-V8 bei.
该发动机有一个这样的设计。
Two electric divert-air valves prevent excessive braking of the
turbochargers when the throttle valve is closed, so enhancing the
responsiveness of the engine on renewed acceleration。
压缩机之后，在节气门之前有管道经过 electric divert-air valves，气体回到压缩
机之前的进气管中的。
大概就是这样。 |
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c**********9
发帖数: 135 | 41
还有
TURBOCHARGERS ............. MHI TD04 12GFT-8
MAXIMUM BOOST PRESSURE ............. 15.0psi
也跟0.8bar有出入。 |
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x*b
发帖数: 5723 | 42 减重实在太牛了，比E46 M3还要轻!! 这性能绝对同级别再次无争议的标杆!
ENGINE
Inline 6 cylinder engine with two mono-scroll turbochargers◦Direct
Injection
VALVETRONIC
Double-VANOS
closed-decked crankcase
twin-wire arc-spray coating (instead of liners) in cylinder bores reduce
engine weight
430 HP (approximately)
369+ LB-FT (500 Nm)
Higher than 7500 RPM redline
WEIGHT
Under 3,306 lb (1500kg) weight (no mention if this is curb weight and no
specifics provided as to what equipment included/not included in figure)
compare to... 阅读全帖 |
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c*********r
发帖数: 19468 | 43 我的理解，BMW说的这个就是yeemartin以前提过的
turbo有两种理念，一是涡轮压降大，涡轮效率高的
一个是涡轮压降小，主要是靠排气动能推动的
后者对废气能量利用得少，但是对排气背压影响也小
有的论文就管后者较impulse turbocharger，我怀疑BMW就是指这个
一般来说，boost较低的turbo系统都是走后者这条路线的
换言之，BMW的意思是，它高升功率很多程度上是来自高转，对boost的依赖相对较低
其实N54的高输出版在overboost模式下已经有500Nm输出（1M和Z4 sDrive35is）
和这台新引擎最大输出相仿，而N54高输出版最大overboost是1bar
如果新引擎填充效率更高（从复杂的冷却系统和Valvetronic的加入看，这点不成问题）
那么也许新引擎的boost可能只有0.8-0.9bar
如果是这样，那430hp的功率峰值真的是很大程度上靠高转了
也就是说，是turbo中的高转引擎 |
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x*b
发帖数: 5723 | 44 难道我错过了什么没看到？不是说是3.0的S55么？不过貌似扭矩说的是"far beyond
369 lb-ft"，很有可能在390左右。
"Despite the attention that BMW's performance division dedicated to the new
S55 engine, it is still derived from the ubiquitous N55 3.0-liter straight-
six. Moreover, the next M3 and the M4 will be fitted with electric power
steering."
"The i-6, internally called S55, is the heart of the new car; Norbert Siegl,
who was responsible for the development of the all-aluminum powerhouse,
maintains that it is essentially a new unit - ... 阅读全帖 |
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c*********r
发帖数: 19468 | 45 真的没有那么简单……我之前也有点想当然，昨天算了算，虽然没有彻底算清楚，但也
理解的多些了
没有说twin turbo比single turbo一定好的说法，还是看具体的需求
就好比之前提到的，twin turbo相对比single turbo更容易surge
反过来也就是说，流量大到single turbo可以介入的时候
twin turbo可以还得继续被bypass掉……
这样一来，就算你此时能够达到更高的转速，但还是未必能介入的更早
（比如我贴的那个turbo的工况图里，surge线是相当抖的，靠转速弥补流量的差别几乎
不可能）
当然，twin turbo一旦介入又会反过来比single turbo更高效
总之，这个要估计引擎常用的流量，boost什么的
还要考虑中冷的效率，叶片的数目和形状也有直接的关系……
总之turbocharging这玩意比我之前的印象技术含量高得多哦…… |
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c*********r
发帖数: 19468 | 46 It's not simple, but roughly we have a simplified formula below:
p2/p1 = (1+e*s*(2*pi*n*r)^2/(cp*t1))^(g/(g-1)),
where e is the isentropic efficiency of the turbocharger
s is the slip ratio, which is determined by the design of the compressor
for example, we can estimate the slip ratio of a compressor with radial
vanes as following:
s = 1 - 0.63*pi/N, where N is the number of vanes.
n in the first formula is the speed of the turbo
r is the outer radius of the compressor
cp is the mean specific h... 阅读全帖 |
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x*b
发帖数: 5723 | 47 估计Macan S的3.0T就是中国版2014 Panamera上那颗3.0T 320hp，Turbo是3.6T，估计
至少420hp起？Base MSRP分别是$52,000 and $75,000起，和当初猜想的倒也差不多。
不过貌似这颗3.6T是全新的引擎啊，估计该用的新技术都用了，应该不错。
Presentation held inside Porsche's North American headquarters in Atlanta,
GA所以信息估计还是比较准确的，从时间上来看的话。不过没有提到4缸的base model.
This presentation says that Porsche is equipping the Macan with two
turbocharged engines, a 3.0 liter in the Macan S and a 3.6 liter in the
Macan Turbo. They should both be V6s like the one in the latest Panamera,
which puts out... 阅读全帖 |
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发帖数: 32207 | 48 不是,老的也是4.4V8 turbocharged,不过调在400hp
新的是445hp
这样差距就非常明显了
新的50i,bmw press release里面就给到4.9s的0-60,很猛了. |
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发帖数: 3419 | 49 fresh air那一侧的压力是高于大气压的，如果lift throttle的时候不打开fresh air
inlet和outlet，在fresh air 的压力下turbine很快就减速了。
两个阀门一打开，让有压力高速运动的fresh air形成自循环维持turbine转速，等待排
气压力的升高。
BMW也提到了这个trick不能"work for extended time"，但没细说，我判断没有电机
"In "Sport" and "Sport Plus" settings, the turbochargers are "pre-tensioned,
" which means that they keep spinning at a high rate of speed even after you
have taken your foot off the throttle. This trick ensures ultra-quick
response times fully comparable to those of a naturally aspirated engi... 阅读全帖 |
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