Iħjut Reviżjoni ta ' l-ewwel drajv: VW eco up

Supermini li jaħarqu l-gass jistgħu jipprovdu alternattiva reali għal karozzi elettriċi ta 'medda limitata Dan huwa l-mudell Volkswagens Eco Up, li jirritorna l-prestazzjoni tas-CO2 ta' vettura elettrika minħabba li huwa mħaddem minn gass naturali kkompressat (CNG). Minflok ma jkunu konverżjoni mgħaġġla, li tieħu ħafna mill-ispazju tal-bagalji, meta l-inġiniera tal-VW kienu qed jippjanaw il-pjattaforma UPS NSF għamlu żgur li tankijiet tal-gass doppji jistgħu jitwaħħlu fil-karozza mingħajr ma jnaqqsu d-daqs tal-but. Wieħed mit-tankijiet kbar u ċilindriċi huwa mwaħħal taħt l-art tal-but, l-ieħor huwa taħt is-sedil ta 'wara. Il-VW irnexxielha wkoll tagħfas tank tal-petrol ta '10 litri maġenb it-tankijiet tal-gass. Iftaħ il-flap tal-fjuwil Eco Ups u hemm kemm il-mili tal-gass kif ukoll il-mili tal-fjuwil konvenzjonali. Il-gauge tal-fjuwil tal-karozzi huwa wkoll b'funzjoni doppja, li juri l-ammont fit-tank tal-petrol għal ftit sekondi mal-istartjar, qabel ma jaqleb biex jindika l-livelli tas-CNG. Il-bidliet l-oħra kollha mhumiex jidhru, ġewwa l-magna bi tliet ċilindri. Kif ukoll sett ta 'injetturi speċifiċi għas-CNG u sistema ġdida ta' ġestjoni tal-magna, il-proporzjon ta 'kompressjoni żdied minn 10. 5:1 sa 11. 5:1, l-ispark plugs jipprovdu vultaġġ ogħla ta 'tqabbid u l-profili u l-pistuni tal-camshaft ġew modifikati. Intużaw materjali ġodda għall-valvi u l-gwidi tal-valv, u s-settings varjabbli tal-valv-ħin huma differenti. L-Eco Up jista' wkoll jiskopri d-differenza bejn il-gass tal-gass high (98 fil-mija tal-metan) u l-gass low (85 fil-mija tal-metan) li jinsab għall-bejgħ fil-Ġermanja 911 stazzjon li jaħdmu bis-CNG. Huwa l-bidliet għall-konvertitur katalitiku li juru d-differenzi ambjentali reali fil-ħruq tas-CNG meta mqabbla mal-petrol. Il-ħruq tas-CNG jirrilaxxa madwar 25 fil-mija inqas CO2 jgħid VW, kif ukoll ferm inqas fil-mod ta 'sustanzi li jniġġsu inklużi monossidu tal-karbonju u idrokarburi, filwaqt li partiċelli fini ma joħorġu xejn. Kollha kemm huma tfisser li l-materjali użati ġewwa l-konvertur huma differenti. Tradott mill-prezzijiet tax-showroom Ġermaniżi, l-Eco Up jiswa madwar 2500 aktar mill-karozza standard tal-petrol, li probabbilment tinftiehem meta wieħed iqis l-ispejjeż żejda tat-tankijiet tal-gass super-b'saħħithom u l-modifiki tal-inġinerija meħtieġa għal dik li se tkun karozza ta 'volum relattivament baxx.

Gas-burning supermini could provide a real alternative to limited-range electric carsThis is Volkswagens Eco Up model, which returns the CO2 performance of an electric vehicle because it is powered by compressed natural gas (CNG). Rather than being a hasty conversion, which takes up most of the luggage space, when VW engineers were planning the Ups NSF platform they made sure that twin gas tanks could be fitted in the car without reducing the size of the boot. One of the large, cylindrical tanks is fitted under the boot floor, the other is under the rear seat. VW has also managed to squeeze a 10-litre petrol tank alongside the gas tanks. Open the Eco Ups fuel flap and theres both the gas filler and the conventional fuel filler. The cars fuel gauge is also dual-function, showing the amount in the petrol tank for a few seconds on start-up, before switching to indicating CNG levels. All the other changes are out of sight, inside the three-cylinder engine. As well as a set of specific injectors for the CNG and a new engine management system, the compression ratio has been raised from 10. 5:1 to 11. 5:1, the spark plugs supply a higher ignition voltage and the camshaft profiles and pistons have been modified. New materials were used for the valves and valve guides, and the variable valve-timing settings are different. The Eco Up can also detect the difference between High (98 per cent methane) gas and Low (85 per cent methane) gas that is on sale at Germanys 911 CNG-fuelling stations. Its the changes to the catalytic convertor that show the real environmental differences in burning CNG compared to petrol. Burning CNG releases around 25 per cent less CO2 says VW, as well as far less in the way of pollutants including carbon monoxide and hydrocarbons, while fine particulates are not emitted at all. All of which means the materials used inside the convertor are different. Translated from the German showroom prices, the Eco Up costs around 2500 more than the standard petrol car, which is probably understandable considering the extra costs of the super-strong gas tanks and the engineering modifications needed for what will be a relatively low-volume car.