M*****e
发帖数: 4550 | | m**********e
发帖数: 12525 | 2 著名的烤肉
【在 M*****e 的大作中提到】
: 是不是直吸比turbo屌
| i****x
发帖数: 17565 | 3 所有钓丝车几乎都是na 4缸，包括dfbb基本款，focus，impala等。
直吸比turbo弱，也便宜。
【在 M*****e 的大作中提到】
: 是不是直吸比turbo屌
| M*****e
发帖数: 4550 | 4 那我说错了，是不是direct injection比较屌？这个比起turbo来呢？
【在 i****x 的大作中提到】
: 所有钓丝车几乎都是na 4缸，包括dfbb基本款，focus，impala等。
: 直吸比turbo弱，也便宜。
| i****x
发帖数: 17565 | 5 di也是新技术，以前主要是lexus全线采用，去年起mazda skyactiv，bmw，subaru brz
和今年的honda也都用了。di可以提升动力降低油耗，但还是na，效果没有turbo明显，
好处是复杂度稍低，成本稍低，没有turbo lag。turbo如果不在乎油耗可以搞出几乎无
限动力。当年b组拉力，2升搞出了600马力。
这些技术都各有利弊，否则也不会共存了。
【在 M*****e 的大作中提到】
: 那我说错了，是不是direct injection比较屌？这个比起turbo来呢？
| M*****e
发帖数: 4550 | 6 现在啥车不带turbo但是带di？
brz
【在 i****x 的大作中提到】
: di也是新技术，以前主要是lexus全线采用，去年起mazda skyactiv，bmw，subaru brz
: 和今年的honda也都用了。di可以提升动力降低油耗，但还是na，效果没有turbo明显，
: 好处是复杂度稍低，成本稍低，没有turbo lag。turbo如果不在乎油耗可以搞出几乎无
: 限动力。当年b组拉力，2升搞出了600马力。
: 这些技术都各有利弊，否则也不会共存了。
| p*********e
发帖数: 32207 | 7 ...
你确定你知道自己在说什么么?
brz
【在 i****x 的大作中提到】
: di也是新技术，以前主要是lexus全线采用，去年起mazda skyactiv，bmw，subaru brz
: 和今年的honda也都用了。di可以提升动力降低油耗，但还是na，效果没有turbo明显，
: 好处是复杂度稍低，成本稍低，没有turbo lag。turbo如果不在乎油耗可以搞出几乎无
: 限动力。当年b组拉力，2升搞出了600马力。
: 这些技术都各有利弊，否则也不会共存了。
| k**********e
发帖数: 2507 | 8 -__-！你还是再多看看吧
【在 M*****e 的大作中提到】
: 是不是直吸比turbo屌
| k**********e
发帖数: 2507 | 9 “turbo如果不在乎油耗可以搞出几乎无限动力。”——不光要考虑油耗，也要考虑机
件的承受能力
brz
【在 i****x 的大作中提到】
: di也是新技术，以前主要是lexus全线采用，去年起mazda skyactiv，bmw，subaru brz
: 和今年的honda也都用了。di可以提升动力降低油耗，但还是na，效果没有turbo明显，
: 好处是复杂度稍低，成本稍低，没有turbo lag。turbo如果不在乎油耗可以搞出几乎无
: 限动力。当年b组拉力，2升搞出了600马力。
: 这些技术都各有利弊，否则也不会共存了。
| i****x
发帖数: 17565 | 10 lexus，mazda skyactiv, latest Honda accord
【在 M*****e 的大作中提到】
: 现在啥车不带turbo但是带di？
:
: brz
| | | i****x
发帖数: 17565 | 11 ... What do u mean
【在 p*********e 的大作中提到】
: ...
: 你确定你知道自己在说什么么?
:
: brz
| g********b
发帖数: 8461 | 12 小白真多....直喷根本就不是什么新技术,是从柴油机上移植过来的.柴油机n多年前就
是直喷了,最早是mechanical injection后来变成了electrical的.
直喷在汽油机上的作用很有限,据说唯一一个比较明显的作用是电脑可以根据工况调整
空燃比(这个我一直怀疑普通的FI也可以做到),在高速巡航的时候可以使用super lean
mode,把空燃比调成60:1 甚至更高,可以节约燃油,不过实测效果有限. | y***g
发帖数: 10422 | 13 “柴油机n多年前就是直喷了”—— n 等于几？
你见过非直喷的柴油机么？
lean
【在 g********b 的大作中提到】
: 小白真多....直喷根本就不是什么新技术,是从柴油机上移植过来的.柴油机n多年前就
: 是直喷了,最早是mechanical injection后来变成了electrical的.
: 直喷在汽油机上的作用很有限,据说唯一一个比较明显的作用是电脑可以根据工况调整
: 空燃比(这个我一直怀疑普通的FI也可以做到),在高速巡航的时候可以使用super lean
: mode,把空燃比调成60:1 甚至更高,可以节约燃油,不过实测效果有限.
| y***g
发帖数: 10422 | 14 以前主要是lexus全线采用 DI ？？？？？？
brz
【在 i****x 的大作中提到】
: di也是新技术，以前主要是lexus全线采用，去年起mazda skyactiv，bmw，subaru brz
: 和今年的honda也都用了。di可以提升动力降低油耗，但还是na，效果没有turbo明显，
: 好处是复杂度稍低，成本稍低，没有turbo lag。turbo如果不在乎油耗可以搞出几乎无
: 限动力。当年b组拉力，2升搞出了600马力。
: 这些技术都各有利弊，否则也不会共存了。
| g********b
发帖数: 8461 | 15
柴油机诞生之后不久就用了直喷,但是我说了,最早的直喷是mechanical injection,后
来前些年才变成了电子直喷,这两个是有很大区别的.
非直喷的柴油机我当然见过,那玩艺每个气缸有个小坑,专门为了燃烧的.一般非直喷柴
油机运转更安静,但是效率比直喷的低一些.
【在 y***g 的大作中提到】
: “柴油机n多年前就是直喷了”—— n 等于几？
: 你见过非直喷的柴油机么？
:
: lean
| p*********e
发帖数: 32207 | 16 "
di也是新技术，以前主要是lexus全线采用，去年起mazda skyactiv，bmw，subaru brz
和今年的honda也都用了。
"
这段话基本上每句都有问题.需要一一指出吗?
【在 i****x 的大作中提到】
: ... What do u mean
| p*********e
发帖数: 32207 | 17 不知道啥叫direct injection就先去做做功课.
【在 g********b 的大作中提到】
:
: 柴油机诞生之后不久就用了直喷,但是我说了,最早的直喷是mechanical injection,后
: 来前些年才变成了电子直喷,这两个是有很大区别的.
: 非直喷的柴油机我当然见过,那玩艺每个气缸有个小坑,专门为了燃烧的.一般非直喷柴
: 油机运转更安静,但是效率比直喷的低一些.
| w********r
发帖数: 14958 | 18 icefox, 肯定是开lexus的。 而且根本没开过turbo车 | S***r
发帖数: 12443 | | g********b
发帖数: 8461 | 20
你自己去做吧，我搞柴油机时间比搞汽油机时间长，这玩艺我比你懂。
【在 p*********e 的大作中提到】
: 不知道啥叫direct injection就先去做做功课.
| | | p*********e
发帖数: 32207 | 21 来那你说说看啥是direct injection,direct指的是什么
给脸不要脸了还.
【在 g********b 的大作中提到】
:
: 你自己去做吧，我搞柴油机时间比搞汽油机时间长，这玩艺我比你懂。
| w*********r
发帖数: 42116 | 22 Gasoline Direct Injection(GDI) , also known as Petrol Direct Injection or
Direct Petrol Injection or Spark Ignited Direct Injection(SIDI) or Fuel
Stratified Injection(FSI) .
现在不过是把一些新技术加进去。
【在 g********b 的大作中提到】
:
: 你自己去做吧，我搞柴油机时间比搞汽油机时间长，这玩艺我比你懂。
| g********b
发帖数: 8461 | 23
都是从柴油机上学过来的。
【在 w*********r 的大作中提到】
: Gasoline Direct Injection(GDI) , also known as Petrol Direct Injection or
: Direct Petrol Injection or Spark Ignited Direct Injection(SIDI) or Fuel
: Stratified Injection(FSI) .
: 现在不过是把一些新技术加进去。
| g********b
发帖数: 8461 | 24
你就别给脸不要脸了，懒得跟你计较也就完了，有种自己说，别整天一副挑衅样。
【在 p*********e 的大作中提到】
: 来那你说说看啥是direct injection,direct指的是什么
: 给脸不要脸了还.
| w********r
发帖数: 14958 | 25 你们两个德粉之间不要吵了。
【在 g********b 的大作中提到】
:
: 你就别给脸不要脸了，懒得跟你计较也就完了，有种自己说，别整天一副挑衅样。
| p*********e
发帖数: 32207 | 26 我已经说的很明显了,知道什么叫丢脸还不自知么?
知道为啥问你direct指的是什么么?
因为你但凡知道是啥,你前面就不可能说下那些露怯的话.
【在 g********b 的大作中提到】
:
: 你就别给脸不要脸了，懒得跟你计较也就完了，有种自己说，别整天一副挑衅样。
| g********b
发帖数: 8461 | 27
我没跟他吵，是他一直在挑衅。有理就说出来，啥也不懂就会骂人的最惹人烦。
【在 w********r 的大作中提到】
: 你们两个德粉之间不要吵了。
| g********b
发帖数: 8461 | 28
神经病一个
【在 p*********e 的大作中提到】
: 我已经说的很明显了,知道什么叫丢脸还不自知么?
: 知道为啥问你direct指的是什么么?
: 因为你但凡知道是啥,你前面就不可能说下那些露怯的话.
| i****x
发帖数: 17565 | 29 我指NA汽油直喷。我知道柴油早就是直喷了，也知道turbo里用直喷有一段时间了。
turbo直喷还有ford ecoboost忘说了
brz
【在 p*********e 的大作中提到】
: "
: di也是新技术，以前主要是lexus全线采用，去年起mazda skyactiv，bmw，subaru brz
: 和今年的honda也都用了。
: "
: 这段话基本上每句都有问题.需要一一指出吗?
| y*****g
发帖数: 6223 | 30 就是不说大众。
分层燃烧是谁搞的？
大众的1.4TSI是机械+涡轮+直喷+分层燃烧。
【在 i****x 的大作中提到】
: 我指NA汽油直喷。我知道柴油早就是直喷了，也知道turbo里用直喷有一段时间了。
: turbo直喷还有ford ecoboost忘说了
:
: brz
| | | p*********e
发帖数: 32207 | 31 就是NA汽油直喷.
实际上,NA汽油直喷比DI TURBO出的早很多.
【在 i****x 的大作中提到】
: 我指NA汽油直喷。我知道柴油早就是直喷了，也知道turbo里用直喷有一段时间了。
: turbo直喷还有ford ecoboost忘说了
:
: brz
| i****x
发帖数: 17565 | 32 我只是在消费市场上说大规模应用的情况。发明这个技术当然很早。我查了一下，下面
是现代GDI的主要商业应用，最成规模的就是toyota的v6，VW的FSI，BMW的N54，ford的
ecoboost。这几个里NA只有toyota。的我随意说几个大品牌而已，不用较真说每句都错
了吧。
Later systems
In 1996 gasoline direct injection reappeared in the automotive market.
Mitsubishi was the first with a GDI engine in the Japanese market with its
Galant/Legnum's 4G93 1.8 L inline-four.[11] It was subsequently brought to
Europe in 1997 in the Carisma,[12] although Europe's then high-sulfur
unleaded fuel led to emissions problems, and fuel efficiency was less than
expected.[13] It also developed the first six-cylinder GDI powerplant, the
6G74 3.5 L V6, in 1997.[14] Mitsubishi applied this technology widely,
producing over one million GDI engines in four families by 2001.[15]
In 1997 Nissan released the Leopard featuring the VQ30DD equipped with
direct injection.[16]
In 1998, Toyota's D4 direct injection system first appeared on various
Japanese market vehicles equipped with the SZ and NZ engines.[17][18][19]
Toyota later introduced its D4 system to European markets with the 1AZ-FSE
engine found in the 2001 Avensis.[20] and US markets in 2005 with the 3GR-
FSE engine found in the Lexus GS 300. Toyota's 2GR-FSE V6 uses a more
advanced direct injection system, which combines both direct and indirect
injection using two fuel injectors per cylinder, a traditional port fuel
injector (low pressure) and a direct fuel injector (high-pressure) in a
system known as D4-S.[21]
In 1999, Renault introduced the 2.0 IDE (Injection Directe Essence),[22]
first on the Megane. Rather than following the lean burn approach, Renault's
design uses high ratios of exhaust gas recirculation to improve economy at
low engine loads, with direct injection allowing the fuel to be concentrated
around the spark.[23] Later gasoline direct injection engines have been
tuned and marketed for their high performance as well as increased fuel
efficiency. PSA Peugeot Citroën, Hyundai and Volvo licensed Mitsubishi'
s GDI technology in 1999.[24][25] Although other companies have since
developed gasoline direct injection engines, the acronym 'GDI' (with an
uppercase final "I") remains a registered trademark of Mitsubishi Motors.[26]
In 2000, the Volkswagen Group introduced its gasoline direct injection
engine in the Volkswagen Lupo, a 1.4 L inline-four unit, under the product
name "Fuel Stratified Injection"[27] (FSI). The technology was adapted from
Audi's Le Mans prototype race car R8. Volkswagen Group marques use direct
injection in its turbocharged 2.0 L TFSI and naturally aspirated 2.0 L FSI
four-cylinder engines. Later, a 2.0 L inline-four unit was introduced in the
model year 2003 Audi A4. PSA Peugeot Citroën introduced its first GDi
(HPi) engine in 2000 in the Citroën C5 and Peugeot 406. It was a 2.0-
liter 16-valve EW10 D unit with 140 hp (104 kW), the system was licensed
from Mitsubishi.[24]
In 2002, the Alfa Romeo 156 with a direct-injection engine, the JTS (Jet
Thrust Stoichiometric) went on sale[28] and today the technology is used on
almost every Alfa Romeo engine.
In 2003, A new 1.8 L Duratec SCi naturally aspirated engine made its
production debut in the Ford Mondeo in 2003.[29] Ford introduced its first
European Ford engine to use direct injection technology in 2001, badged SCi
(Smart Charge injection) for Direct-Injection-Spark-Ignition (DISI).[29] The
range will include some turbocharged derivatives, including the 1.1 L,
three-cylinder turbocharged unit showcased at the 2002 Geneva Show.[29]
In 2003, BMW introduced a low-pressure gasoline direct injection N73 V12.[30
] This initial BMW setup could not enter lean-burn mode, but the company
introduced its second-generation High Precision Injection (HPI) system on
the new turbocharged N54 straight-6 in 2006, which used high-pressure
injectors.[31] This system surpasses many others with a wider envelope of
lean-burn time, increasing overall efficiency.[32] PSA is cooperating with
BMW on a new line of engines that made its first appearance in the 2007 MINI
Cooper S. Honda released their own direct injection system on the Stream
sold in Japan.[33] Honda's fuel injector is placed directly atop the
cylinder at a 90-degree angle rather than a slanted angle.[33]
Since 2003, General Motors has released several direct injected engines: in
2003, a 155 hp (116 kW) version of the 2.2 L Ecotec used in the Opel/
Vauxhall Vectra and Signum; in 2006, a 2.0 L turbocharged Ecotec LNF for the
new Opel GT, Pontiac Solstice GXP, and the Saturn Sky Red Line, the same
engine was used in in the Super Sport versions of the 2007 Chevrolet Cobalt
and the HHR. Also in 2007, the 3.6 L V6 LLT became available in the
redesigned Cadillac CTS and STS. The 3.6 L was added to the 2009 model GMC
Acadia, Chevrolet Traverse, Saturn Outlook, Buick Enclave, and the 2010
Chevy Camaro. In 2010, a 2.4 L direct injected Ecotec LAF was introduced,
and in 2012, 2.5 L Ecotec LCV and 2.0 L turbocharged Ecotec LTG using a new
Gen III Ecotec block were released.
In 2004 Isuzu produced the first GDi engine sold in a mainstream American
vehicle, standard on the 2004 Axiom and optional on the 2004 Rodeo. Isuzu
claimed the benefit of GDi is that the vaporizing fuel has a cooling effect,
allowing a higher compression ratio (10.3:1 versus 9.1:1) that boosts
output by 20 hp (15 kW), and that 0-to-60 mph times drop from 8.9 to just 7.
5 seconds, with the quarter-mile being cut from 16.5 to 15.8 seconds.[34]
In 2005, Mazda began to use their own version of direct-injection in the
Mazdaspeed6 and later on the CX-7 sport-utility, and the new Mazdaspeed3 in
the US and European market. It is referred to as Direct Injection Spark
Ignition (DISI).
In 2006, BMW released the new N54 twin-turbo-charged direct injection inline
-six engine for its 335i Coupe and later for the 335i Sedan, 535i series and
the 135i models.[35][36] Mercedes-Benz released its direct injection system
(Charged Gasoline Injection, or "CGI") on the CLS 350 CGI featuring common
rail, piezo-electric direct fuel injectors. The CLS 350 CGI offers 292 BHP
versus 272 BHP for the CLS 350, with reduced carbon dioxide emissions and
improved fuel economy.[37] Audi also released its V8 engine with FSI
technology in Audi R8 that can produce 424 BHP with low carbon emission and
more fuel economy.[38][39]
In 2007, Ford introduced its new Ford EcoBoost engine technology designed
for a range of global vehicles (from small cars to large trucks). The engine
first appeared in the 2007 Lincoln MKR Concept under the name TwinForce.[40
] The new global EcoBoost family of 4-cylinder and 6-cylinder engines
features turbocharging and direct injection technology (GTDI - Gasoline
Turbocharged Direct Injection).[40] A 2.0 L version was unveiled in the 2008
Ford Explorer America Concept.[40]
In 2008, BMW released the X6 xDrive50i equipped with a direct injected twin
turbo N63 V8 engine.[41]
In 2009, Ferrari began selling the front-engine California with a direct
injection system, and announced that its new 458 Italia car will also
feature a direct injection system, a first for Ferrari mid-rear engine
setups.[42] Porsche also began selling the 997 and Cayman equipped with
direct injection. Ford produced the new generation Taurus SHO and Flex with
a 3.5 L twin-turbo EcoBoost V-6 with direct injection.[43] Holden has also
added two direct injection engines as standard on the V6 variant Commodores
under the name of SIDI or Spark Ignition Direct Injection.[citation needed]
The Infiniti Essence concept car is powered by a direct injected twin turbo
V6.[44] The Jaguar Land Rover AJ-V8 Gen III 5.0 L engine (introduced in
August 2009 for the 2010 model year) features spray-guided direct injection.
In 2010 Infiniti will produce the M56 which includes DI.[citation needed]
Motus Motorcycles is developing, with Katech Engines, a direct-injected V4
engine named the KMV4 as the powertrain for their MST motorcycles. [45] The
Hyundai Sonata 2011 model will come with GDI engines, including a turbo
charged 2.0-litre that produces 274 hp. Hyundai's Theta I-4 engine family is
a proprietary design, engineered in Namyang, Korea and currently in
production for applications all over the world.[46]
【在 p*********e 的大作中提到】
: 就是NA汽油直喷.
: 实际上,NA汽油直喷比DI TURBO出的早很多.
| i****x
发帖数: 17565 | 33 忘了
【在 y*****g 的大作中提到】
: 就是不说大众。
: 分层燃烧是谁搞的？
: 大众的1.4TSI是机械+涡轮+直喷+分层燃烧。
| y*****g
发帖数: 6223 | 34 见到很多KIA是GDI的，不知道最近卖的如何
【在 i****x 的大作中提到】
: 我只是在消费市场上说大规模应用的情况。发明这个技术当然很早。我查了一下，下面
: 是现代GDI的主要商业应用，最成规模的就是toyota的v6，VW的FSI，BMW的N54，ford的
: ecoboost。这几个里NA只有toyota。的我随意说几个大品牌而已，不用较真说每句都错
: 了吧。
: Later systems
: In 1996 gasoline direct injection reappeared in the automotive market.
: Mitsubishi was the first with a GDI engine in the Japanese market with its
: Galant/Legnum's 4G93 1.8 L inline-four.[11] It was subsequently brought to
: Europe in 1997 in the Carisma,[12] although Europe's then high-sulfur
: unleaded fuel led to emissions problems, and fuel efficiency was less than
| p*********e
发帖数: 32207 | 35 更早的不提,就说技术上跟现在直喷机基本相当的产品,
三菱九几年开始出直喷汽油机,用在量产车上
即便你说的那几个牌子,bmw上代7系02年的时候的760i就已经在用直喷了
当家的直六,N53就是自吸直喷,也是已经N年了.
另外列表以外,MB在欧版CLS上也有用直喷,而且是二代的spray guided,也是好多年了
反过来lexus如果是在美国市场,IS350/GS350上的2GR-FSE是部分直喷
也就是说进气道和缸内都有喷射,而大部分的LEXUS还都是传统的进气道内port
injection
toyota日本国内市场倒是有直喷机
相反di+turbo才是从vw的2.0tfsi开始(大概05,06年?)逐渐流行的,
要比NA DI晚得多.
最后,所谓的直喷指的是直接喷射燃油到气缸,
说是直喷是为了对比传统的port injection是喷到进气道,然后混合汽通过进气道进气
缸.
柴油机是压燃,也就是说油进了气缸,然后跟进气混合,
在压缩冲程在温度压强升高到一定程度后自发燃烧
所以从机制上先天就是"直喷"的.
早点儿的柴油机最多是喷射机制和喷射压力有不同,另外就是早期的柴油机有非增压的,
但非"直喷"的"柴油机"?至少乘用车上,目前还没报废的车上,没听说过,也不太可能.
【在 i****x 的大作中提到】
: 我指NA汽油直喷。我知道柴油早就是直喷了，也知道turbo里用直喷有一段时间了。
: turbo直喷还有ford ecoboost忘说了
:
: brz
| p*********e
发帖数: 32207 | 36 大规模应用,N53大规模应用就好多年了
另外lexus直到现在也没有全线na di
另外你举的VW FSI,bmw n54, ford ecoboost,恰恰都是di turbo而不是你原文说的NA
di
你倒不如试试做做功课为啥na di在北美不流行.
【在 i****x 的大作中提到】
: 我只是在消费市场上说大规模应用的情况。发明这个技术当然很早。我查了一下，下面
: 是现代GDI的主要商业应用，最成规模的就是toyota的v6，VW的FSI，BMW的N54，ford的
: ecoboost。这几个里NA只有toyota。的我随意说几个大品牌而已，不用较真说每句都错
: 了吧。
: Later systems
: In 1996 gasoline direct injection reappeared in the automotive market.
: Mitsubishi was the first with a GDI engine in the Japanese market with its
: Galant/Legnum's 4G93 1.8 L inline-four.[11] It was subsequently brought to
: Europe in 1997 in the Carisma,[12] although Europe's then high-sulfur
: unleaded fuel led to emissions problems, and fuel efficiency was less than
| g********b
发帖数: 8461 | 37
那看来得给你普及点知识了。
An indirect injection diesel engine delivers fuel into a chamber off the
combustion chamber, called a prechamber, where combustion begins and then
spreads into the main combustion chamber. The prechamber is carefully
designed to ensure adequate mixing of the atomized fuel with the compression
-heated air. The purpose of the divided combustion chamber is to speed up
the combustion process, in order to increase the power output by increasing
engine speed[1]. The addition of a prechamber, however, increases heat loss
to the cooling system and thereby lowers engine efficiency. The engine
requires glow plugs for starting. In an indirect injection system the air
moves fast, mixing the fuel and air. This simplifies injector design and
allows the use of smaller engines and less tightly toleranced designs which
are simpler to manufacture and more reliable. Direct injection, by contrast,
uses slow-moving air and fast-moving fuel; both the design and manufacture
of the injectors is more difficult. The optimisation of the in-cylinder air
flow is much more difficult than designing a prechamber. There is much more
integration between the design of the injector and the engine.[2] It is for
this reason that car diesel engines were almost all indirect injection until
the ready availability of powerful CFD simulation systems made the adoption
of direct injection practical.
【在 p*********e 的大作中提到】
: 更早的不提,就说技术上跟现在直喷机基本相当的产品,
: 三菱九几年开始出直喷汽油机,用在量产车上
: 即便你说的那几个牌子,bmw上代7系02年的时候的760i就已经在用直喷了
: 当家的直六,N53就是自吸直喷,也是已经N年了.
: 另外列表以外,MB在欧版CLS上也有用直喷,而且是二代的spray guided,也是好多年了
: 反过来lexus如果是在美国市场,IS350/GS350上的2GR-FSE是部分直喷
: 也就是说进气道和缸内都有喷射,而大部分的LEXUS还都是传统的进气道内port
: injection
: toyota日本国内市场倒是有直喷机
: 相反di+turbo才是从vw的2.0tfsi开始(大概05,06年?)逐渐流行的,
| p*********e
发帖数: 32207 | 38 呵呵,知道做功课了?行啊,总比无知强.
你就没自己看看这东西有在乘用车上用的么?
compression
increasing
loss
【在 g********b 的大作中提到】
:
: 那看来得给你普及点知识了。
: An indirect injection diesel engine delivers fuel into a chamber off the
: combustion chamber, called a prechamber, where combustion begins and then
: spreads into the main combustion chamber. The prechamber is carefully
: designed to ensure adequate mixing of the atomized fuel with the compression
: -heated air. The purpose of the divided combustion chamber is to speed up
: the combustion process, in order to increase the power output by increasing
: engine speed[1]. The addition of a prechamber, however, increases heat loss
: to the cooling system and thereby lowers engine efficiency. The engine
| g********b
发帖数: 8461 | 39
自己看最后几句话：The optimisation of the in-cylinder air
flow is much more difficult than designing a prechamber. There is much more
integration between the design of the injector and the engine.[2] It is for
this reason that car diesel engines were almost all indirect injection until
the ready availability of powerful CFD simulation systems made the adoption
of direct injection practical.
现在直喷技术很成熟了所以就没人用Indirect Injection了，但是以前直喷技术不是很
成熟的时候一直都在用的。
【在 p*********e 的大作中提到】
: 呵呵,知道做功课了?行啊,总比无知强.
: 你就没自己看看这东西有在乘用车上用的么?
:
: compression
: increasing
: loss
| p*********e
发帖数: 32207 | 40 来,你就说说看你在美国见到哪辆乘用车是非直喷柴油机吧.
more
for
until
adoption
【在 g********b 的大作中提到】
:
: 自己看最后几句话：The optimisation of the in-cylinder air
: flow is much more difficult than designing a prechamber. There is much more
: integration between the design of the injector and the engine.[2] It is for
: this reason that car diesel engines were almost all indirect injection until
: the ready availability of powerful CFD simulation systems made the adoption
: of direct injection practical.
: 现在直喷技术很成熟了所以就没人用Indirect Injection了，但是以前直喷技术不是很
: 成熟的时候一直都在用的。
| | | g********b
发帖数: 8461 | 41
多了，奔驰的OM603、OM606两款3.0L 直6的柴油机都是非直喷的，2.5L的OM605还有一
部分OM602也都是非直喷，还需要我举别的例子吗？
【在 p*********e 的大作中提到】
: 来,你就说说看你在美国见到哪辆乘用车是非直喷柴油机吧.
:
: more
: for
: until
: adoption
|
|
