作者: diecoss (熊) 站內: HONDA
標題: Re: 請問有人知道NR750的知識嗎？
時間: Sat Jan 20 17:44:40 2007
以下轉錄自 Wikipedia, the free encyclopedia
原始頁面：http://en.wikipedia.org/wiki/Honda_NR
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Honda NR
From Wikipedia, the free encyclopedia
The road version of the Honda NR, released in 1992.Honda's NR (New Racing)
V-four motorcycle engine series started in 1979 with the 500cc NR500
Grand Prix racer that used oval pistons. This was followed during the 1980's
by a 750cc endurance racer version known as the NR750. The oval piston concept
allowed for eight valves per cylinder which generated more power due to the
increased air/fuel mixture throughput and compression. In 1992 Honda produced
around 300 street versions of a 750cc model, the NR (often mistakenly referred
to as the NR750), with a 90-degree V angle. It was very fast. The bike became
the most expensive production bike at the time when it was selling for
$50,000 and with the rarity, they nowadays rarely change hands.
道路版的本田NR在1992年發表。本田的NR(New Racing)V4系列機車引擎始於西元1979年使
用橢圓形活塞的GP賽車NR500，然後在1980年代推出750cc耐久賽版本NR750。橢圓形活塞
的概念讓每個活塞能夠配置八個氣門，以在壓縮中增加更多的油氣混合物來提升馬力。在
1992年，本田推出約300輛750cc的道路版本，九十度V缸的NR(經常被誤指為NR750)。在當
時非常快。50,000美元的售價使它成為當時最貴的輛產機車，而由於它的稀有，現在已經
很少轉手。
Development
The origins of the 'NR' series of motorcycles lie in Honda's return to Grand-
Prix motorcycle racing in the late 1970's following an absence since their
highly successful participation in the 1960's. During the absence of Honda,
Grand Prix racing had come to be dominated by two-stroke machines that could
easily attain a higher specific output than a four-stroke equivalent. Honda
had long preferred to concentrate on four-stroke development and therefore
decided to produce such a machine to challenge their Japanese rivals.
NR系列的起源要追溯到1970年代末期，自60年代成功的賽事之後，在GP缺席的本田回歸GP
賽事。在本田缺席的這段期間，能夠輕易超越同排氣量四行程引擎馬力的二行程引擎已經
主宰了GP賽事。本田長期以來專注於四行程的發展，所以決定要以四行程引擎與其它採用
二行程引擎的日本車廠對抗。
To achieve this aim Honda could have looked to follow their 1960's practice of
increasing the number of cylinders to produce more power. However, Grand Prix
rules at the time required a configuration with maximum of four cylinders.
Honda engineers therefore came up with the highly innovative solution of
constructing a 'V8' engine in the form of a four cylinder. This was achieved
by designing an oval piston that allowed a total of 8 valves per cylinder, and
connecting two con-rods to each piston. Such a configuration led to almost
unprecedented complexity in terms of engine design, with 32 valves and eight
con-rods incorporated into the dimensions of a regular four cylinders
motorcycle engine
要達成這個目標，本田原來可以追循他們在1960年代的經驗，增加活塞數來提升馬力，但
是當時的GP賽事規定最多只能使用四個汽缸。本田的工程師們想出了一個非常有創意的解
決方案：建造一個四汽缸的“V8”引擎；他們設計出一個可以容納八個汽門、兩支連桿的
活塞。這樣的設定造就空前的複雜性，將32支汽門、8根連桿塞進普通大小的四缸引擎。
The NR500 race bike.Development and testing of the new engine proved fraught
with difficulty (prompting some motorcycle journalists of the time to comment
that NR meant "Not Ready") but Honda eventually succeeded in meeting the
original performance criteria for the engine. The final 500cc race version
was capable of developing approximately 130bhp at over 20,000rpm. However,
this rarely translated into success on the track for the NR500, and Honda
subsequently redirected its Grand Prix campaign in the form of the NS500
two-stroke machine.
NR500賽車，研發與測試被證實是伴隨著困難(有些媒體甚至稱NR為“Not Ready”)，但是
本田終究達成設計目標的性能。最終的500cc賽車版本引擎在超過20,000轉時發揮馬力將
近130bhp。但是這並沒有為本田帶來多少賽道上的成功；其後，本田將其GP賽事導向二行
程的NS500賽車。
The oval piston concept continued in the NR750 endurance bike, which made a
brief appearance during the 1980's. Finally the technology was transferred to
the road, at least on a limited basis, in the bike simply referred to as the
'NR'. Almost certainly the most expensive road motorcycle yet offered for
sale, a limited number of the NR models was sold in the early 1990's with a
750cc version of the engine capable of developing approximately 125bhp at
14,000rpm in standard form. Although a heavy machine by modern standards,
it incorporated a range of technologies and design features that have now
appeared on more regular models.
這個橢圓活塞的概念繼續在NR750耐久賽車中被使用，並且短暫的出現在1980年代。最後
這項科技被應用至道路上，至少在限量的基礎上，被使用在一輛被稱為NR的機車上。幾乎
確定是史上最昂貴的道路機車，750cc引擎、限量版本的NR在1990年代上市，在14,000轉
時馬力125bhp。儘管從現在的標準來看，它是一輛很重的車，但是很多它所應用的科技與
設計特徵現在正被使用在更多的常規車款上。
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順便看了很多關於60、70年代的GP歷史
MV Agusta竟然曾經包辦全年冠軍 原來也曾經這麼風光過
難怪現在都已經從賽事裡銷聲匿跡了還可以把跑車賣這樣貴的......
似乎是二行程的崛起改變了MV Agusta的命運
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╭┼ Origin: 玩車人的天地 ˙東吳機研站 scumotor.com.tw ┼╯ Author: diecoss從 218-167-29-153.dynamic.hinet.net 發表╰╮Modify: 07/01/20 19:15:43