成人小说亚洲一区二区三区,亚洲国产精品一区二区三区,国产精品成人精品久久久,久久综合一区二区三区,精品无码av一区二区,国产一级a毛一级a看免费视频,欧洲uv免费在线区一二区,亚洲国产欧美中日韩成人综合视频,国产熟女一区二区三区五月婷小说,亚洲一区波多野结衣在线

立即打開
豐田拿氫燃料電池汽車賭明天

豐田拿氫燃料電池汽車賭明天

Doron Levin 2014-02-07
豐田曾經(jīng)兩次用行動(dòng)戰(zhàn)勝了外界唱反調(diào)的人,一次是推出雷克薩斯豪車,一次是引進(jìn)了油電混動(dòng)車普銳斯。這一次,它又瞄準(zhǔn)了一直叫好不叫座的氫燃料電池車。盡管業(yè)內(nèi)因?yàn)槟壳皻錃饣A(chǔ)設(shè)施匱乏而唱衰這種車型,但豐田還是決定在明年推出自己的氫燃料電池車。

?

????豐田汽車公司(Toyota Motor)正打算再次無視那些唱反調(diào)的人。這次豐田的創(chuàng)舉是推出首款商用氫燃料電池汽車。這家日本汽車廠商表示,新車將于明年上市銷售。

????豐田在一月底于底特律舉行的北美國際車展(North American International Auto Show)和一月初在拉斯維加斯舉行的消費(fèi)電子展(Consumer Electronics Show)上都展示過一輛名為FCV的原型車。很多人都希望這輛車正式推出時(shí)能有個(gè)更好記的名字。

????首批量產(chǎn)燃料電池車的規(guī)模不大(不足一萬輛),成本很高(五萬美元到十萬美元之間),而且基本上只在加州銷售,因?yàn)樨S田表示加州已有的小規(guī)模連鎖加氫站能滿足消費(fèi)者對燃料的需求。

????不過豐田也著重指出,這項(xiàng)技術(shù)的潛力很大,因?yàn)闅錃怆m然不是天然資源,但卻能從沼氣這類化石燃料中提取。同時(shí)燃料電池非常清潔,它在產(chǎn)生電能的同時(shí)只排放水蒸氣和熱量。從本質(zhì)上說,氫燃料電池就是另一種蓄電池。

????而特斯拉(Tesla)電動(dòng)車公司的創(chuàng)始人埃隆?穆斯克在去年五月接受采訪時(shí)曾表示,這項(xiàng)新技術(shù)就是“傻瓜電池”,是個(gè)“笨”主意。穆斯克還表示懷念通用汽車公司(General Motors)現(xiàn)已退休的高管鮑勃?盧茲,正是他經(jīng)常貶低油電混動(dòng)車,叫它們“蠢東西”——后來馬斯克也開始信奉這種觀點(diǎn)。

????20世紀(jì)80年代,豐田首次推出雷克薩斯豪華車的時(shí)候,市場也曾深表懷疑。到了20世紀(jì)90年代末,汽車業(yè)對那輛名字古怪的普銳斯(Prius)油電混動(dòng)車也嚴(yán)重不看好。可是這兩個(gè)開先河的產(chǎn)品在市場上卻一直都大獲全勝。

????普及點(diǎn)化學(xué)常識吧!燃料電池的核心是由聚合物電解質(zhì)薄膜(PEM)組成的,氫氣和氧氣就從這層膜穿過。在它們穿過時(shí),電子就從氫原子上剝離下來并變成電流——而氫分子與氧氣結(jié)合就形成水蒸氣。

????科學(xué)家和工程師早就掌握了制造燃料電池的方法,而且已經(jīng)用在了航空項(xiàng)目和試驗(yàn)車輛上。這些電池商用的最大障礙在于其尺寸、復(fù)雜性和高成本。通用汽車、福特汽車公司(Ford)、戴姆勒汽車公司(Daimler)及其他眾多汽車廠商一直在致力于研發(fā)一種更耐用、更經(jīng)濟(jì)的小型燃料電池。有幾家廠商還通過合作來降低研發(fā)成本。

????氫氣必須在一定壓力下保存,而且遇火就會(huì)爆炸。為了證明自己為FCV研發(fā)的存儲(chǔ)罐是可靠的,豐田特地對它開槍射擊,結(jié)果它也并沒有爆炸。

????另一個(gè)讓燃料電池難以投入實(shí)用的障礙(豐田聲稱已經(jīng)解決了這個(gè)問題)在于超低溫。它會(huì)導(dǎo)致水蒸氣凝結(jié),從而讓氫氣無法穿過聚合物電解質(zhì)薄膜。

????不過最主要的問題還在于基礎(chǔ)設(shè)施。對足夠多的消費(fèi)者來說,豐田的FCV能夠引起足夠多消費(fèi)者的興趣,而且讓他們能買得起,從而能在生產(chǎn)和銷售上激發(fā)更多的創(chuàng)新嗎?能源公司早已掌握了如何將沼氣轉(zhuǎn)化為工業(yè)級氫氣的辦法。如果有足夠的需求,加氣站就能增加加氫泵。

????豐田運(yùn)營資深副總裁鮑勃?卡特說:“如果其他人看不上這項(xiàng)技術(shù),那也沒關(guān)系,” 同時(shí)他指出普銳斯問世以來已經(jīng)賣出了600萬輛。

????很久以前汽車高管們就調(diào)侃過,氫氣是未來燃料——而且永遠(yuǎn)都屬于未來式。而豐田這次可能馬上又要讓這個(gè)笑話擺脫難堪的命運(yùn)了。

????譯者:清遠(yuǎn)

????Toyota Motor is getting set to defy naysayers once more. This time, Toyota's initiative is the first commercial hydrogen-powered fuel-cell car, which the Japanese automaker said it will sell starting next year.

????Toyota (TM) showed a prototype it calls FCV at the North American International Auto Show in Detroit last week and at the Consumer Electronics Show in Las Vegas earlier in the month. Many are hoping the company can think of a catchier name by the time the car is introduced.

????The first production run of fuel-cell cars will be small (fewer than 10,000), costly (between $50,000 and $100,000) and sold mostly in California, where Toyota says a small chain of hydrogen filling stations will satisfy demand for the fuel.

????But the automaker also contends the potential for the technology is enormous, because hydrogen, which doesn't occur naturally, can be derived from fossil fuels like methane. Fuel cells, meanwhile, are clean, generating electricity and emitting only water vapor and heat. In essence, a hydrogen fuel cell is another type of battery.

????Elon Musk, the founder of Tesla (TSLA) battery-powered cars, in an interview in May referred to the new technology as "fool cells" and a "stupid" idea. Musk is reminiscent of General Motors (GM) executive Bob Lutz, now retired, who regularly dismissed gas-electric hybrids as "dumb" -- until he became an apostle.

????Toyota elicited deep skepticism when it unveiled Lexus luxury cars in the 1980s. In the late 1990s the automobile industry likely was dubious about its oddly named Prius gas-electric hybrid. Both initiatives have been grand slams.

????Chemistry tutorial alert! At its heart, a fuel cell consists of a polymer electrolyte membrane (PEM) through which hydrogen and oxygen pass. As they do, electrons are stripped from the hydrogen and become electric current -- the hydrogen molecules combine with oxygen to form water vapor.

????Scientists and engineers have known how to build fuel cells for some time and have demonstrated them in space programs and in experimental vehicles. The main obstacles to their commercialization have been their size, complexity, and high cost. GM, Ford (F), Daimler and most other carmakers have been working to develop a small, durable and affordable fuel cell. Several manufacturers are partnering to reduce research cost.

????Hydrogen must be stored under pressure and will explode if ignited. To show that it had developed a reasonable storage tank for its FCV, Toyota fired bullets at it, without an explosion.

????Another obstacle to practical use of fuel cells (which Toyota says it's solved) has been low temperature, which causes water vapor to freeze, thereby inhibiting the flow of hydrogen across the PEM.

????But the major complication has been infrastructure. Will Toyota's FCV be interesting and affordable to consumers in large enough measure to attract innovation in terms of production and distribution? Energy companies know how to convert methane to hydrogen in industrial quantities. Filling stations could add hydrogen pumps if enough demand exists.

????"If others want to tune out this technology, that's fine," said Bob Carter, Toyota senior vice president of operations, noting that his company has sold six million Prius hybrids since its introduction.

????Once upon a time, automotive executives would crack that hydrogen was the fuel of the future --and always would be. Toyota may be on the brink of putting their joke out of its misery.

掃描二維碼下載財(cái)富APP
久久久久久精品人妻无码动漫专区| 亚洲精品国产综合无码| 久久99亚洲含羞草影院| 色欲aⅴ蜜臀视频一区二区| 99久久国产精品免费一区二区| 伊人www22综合色| 国产A级毛片久久久久久精品| 久久综合九色综合欧美狠狠| 国偷自产av一区二区三区蜜| 乳揉みま痴汉电车中文字幕| 久青青视频精品免费观看| 国产精品天干天干在线观看| 日韩一区三区视频| 久久精品国产亚洲AV无码麻豆| 粉嫩大学生无套内射无码卡视频| 日韩国产欧美二区高清| 夜夜操国产天天干精品| 久久婷婷秘精品果冻传媒| 精品国产一区二区三区AV性色| 亚洲风情亚aⅴ在线发布| 精品无码午夜福利理论片| 欧美国产中文在线字幕视频| 免费 无码 国产在线观看p午夜亚洲av中文字字幕| 国产午夜精品视频一区二区三区| 亚洲欧美成人AⅤ在线专区| 亚洲国产精品成人AV在线| 特级丰满少妇一级AAAA爱毛片| 国产精品无码不卡免费视频| 亚洲日本国产午夜视频| 99精品视频免费热播在线观看| 久久久五月天亚洲天堂中文字幕在线观看| 美国一级毛片片aa久久综合| 欧美肥妇毛多水多BBXX水蜜桃| 麻豆AV一区二区三区| 少妇私密会所按摩到高潮呻吟| 男人女人午夜视频免费| 国产综合亚洲专区在线视频免费| 国产精品美女久久久免费| 国产一级a毛一级a看免费视频视频一区二区三区| 国产精品自在线拍国产手青青机版| 国产高清在线精品一区二区|