{"id":28230,"date":"2020-02-26T22:32:12","date_gmt":"2020-02-26T20:32:12","guid":{"rendered":"http:\/\/mixmotor.eu\/?p=28230"},"modified":"2020-09-28T21:08:18","modified_gmt":"2020-09-28T19:08:18","slug":"usporny-vdaka-aerodynamike-novy-actros-je-navrhnuty-pre-efektivnost","status":"publish","type":"post","link":"https:\/\/mixmotor.eu\/en\/28230\/usporny-vdaka-aerodynamike-novy-actros-je-navrhnuty-pre-efektivnost","title":{"rendered":"\u00dasporn\u00fd v\u010faka aerodynamike: nov\u00fd Actros je navrhnut\u00fd pre efekt\u00edvnos\u0165"},"content":{"rendered":"\n

V porovnan\u00ed s predchodcom a\u017e o p\u00e4\u0165 percent ni\u017e\u0161ia spotreba \u2013 nov\u00fd Actros je efekt\u00edvnej\u0161\u00ed ne\u017e kedyko\u013evek predt\u00fdm. <\/em><\/strong><\/p>\n\n\n\n

So syst\u00e9mom MirrorCam a konk\u00e1vnymi odtrhov\u00fdmi klapkami: aerodynamick\u00e1 kab\u00edna vodi\u010da vo ve\u013ekej miere prispieva k ni\u017e\u0161ej spotrebe paliva<\/strong>.<\/p>\n\n\n\n

Zlep\u0161enie aerodynamiky sa dosiahlo na po\u010d\u00edta\u010di, v aerodynamickom tuneli a na ceste.<\/p><\/blockquote>\n\n\n\n

Spotreba paliva modelu Actros sa za posledn\u00e9 roky neust\u00e1le zni\u017eovala. Napr\u00edklad v typickom nasaden\u00ed v dia\u013ekovej doprave sa podarilo medzi rokom 2011 a predstaven\u00edm nov\u00e9ho modelu Actros 2019 dosiahnu\u0165 \u00faspory na \u00farovni a\u017e 15 percent. Nov\u00fd Actros nezost\u00e1val len pri tom a v porovnan\u00ed so svoj\u00edm predchodcom jazd\u00ed na dia\u013eniciach \u00faspornej\u0161ie o tri percent\u00e1 a pri jazde mimo obc\u00ed dokonca a\u017e o p\u00e4\u0165 percent. K tomuto zn\u00ed\u017eeniu spotreby prispievaj\u00fa \u2013 okrem optimalizovan\u00e9ho riadenia tempomatu a prevodovky s n\u00e1zvom Predictive Powertrain Control (PPC), ako aj nov\u00e9ho prevodov\u00e9ho pomeru zadnej n\u00e1pravy \u2013 vo ve\u013ekej miere aj aerodynamick\u00e9 vylep\u0161enia kab\u00edny vodi\u010da.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Aerodynamika ako jeden z najd\u00f4le\u017eitej\u0161\u00edch prvkov pri zni\u017eovan\u00ed spotreby<\/strong><\/p>\n\n\n\n

Mimoriadny v\u00fdznam aerodynamiky objas\u0148uje jedno \u010d\u00edslo: v pr\u00edpade aktu\u00e1lneho n\u00e1kladn\u00e9ho automobilu s \u010delnou kab\u00ednou v eur\u00f3pskom nasaden\u00ed v dia\u013ekovej doprave sa pribli\u017ene tretina celej mechanickej energie vyu\u017eije na prekonanie odporu vzduchu. To sa odr\u00e1\u017ea aj v novom modeli Actros: u\u017e len samotn\u00fd syst\u00e9m MirrorCam, ktor\u00fd nahr\u00e1dza klasick\u00e9 sp\u00e4tn\u00e9 zrkadl\u00e1, prispieva 1,5-percentn\u00fdm podielom k celkov\u00e9mu zn\u00ed\u017eeniu spotreby nov\u00e9ho modelu Actros. K zn\u00ed\u017eeniu spotreby prispievaj\u00fa aj nov\u00e9, konk\u00e1vne odtrhov\u00e9 klapky na kab\u00edne vodi\u010da.<\/p>\n\n\n\n

Hodnotn\u00e9 zariadenie: axi\u00e1lny ventil\u00e1tor pre r\u00fdchlosti vetra a\u017e do 250 km\/h<\/strong><\/p>\n\n\n\n

V neposlednom rade s\u00fa tieto zlep\u0161enia d\u00f4sledkom intenz\u00edvnych testov v aerodynamickom tuneli spolo\u010dnosti Daimler AG v Untert\u00fcrkheime. Tam in\u017einieri simulovali podmienky obtekania vzduchu okolo n\u00e1kladn\u00e9ho motorov\u00e9ho vozidla s cie\u013eom optimalizova\u0165 hodnotu cw, teda aerodynamiku, a t\u00fdm p\u00e1dom aj spotrebu. Pokusy v tuneli priniesli cenn\u00e9 inform\u00e1cie, najm\u00e4 v pr\u00edpade syst\u00e9mu MirrorCam. Na jednej strane priniesli inform\u00e1cie o aerodynamickom dizajne oboch kamerov\u00fdch ramien a na druhej strane inform\u00e1cie t\u00fdkaj\u00face sa umiestnenia kamerov\u00fdch ramien na pravej a \u013eavej strane kab\u00edny vodi\u010da. Tie s\u00fa toti\u017e na rozdiel od klasick\u00fdch zrkadiel v pr\u00edpade nov\u00e9ho modelu Actros upevnen\u00e9 na r\u00e1me strechy.<\/p>\n\n\n\n

<\/p>\n\n\n\n

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Zariadenie v Untert\u00fcrkheime umo\u017e\u0148uje v\u00fdvoj\u00e1rom dosiahnu\u0165 r\u00fdchlos\u0165 vetra na \u00farovni a\u017e 250 kilometrov za hodinu. \u201eTu sa vykon\u00e1vaj\u00fa paralelne s po\u010d\u00edta\u010dov\u00fdmi v\u00fdpo\u010dtami pr\u00fadenia vzduchu \u2013 ide o digit\u00e1lnu simul\u00e1ciu prostredn\u00edctvom \u201aPo\u010d\u00edta\u010dovej dynamiky tekut\u00edn\u2018 (Computational Fluid Dynamics, CFD) \u2013 n\u00e1hodn\u00e9 sk\u00fa\u0161ky, ktor\u00e9 maj\u00fa potvrdi\u0165 aerodynamick\u00e9 zlep\u0161enia koncep\u010dn\u00fdch kon\u0161truk\u010dn\u00fdch dielov,\u201c tvrd\u00ed Michael Hilgers, ved\u00faci CAE Vehicle Functions vo v\u00fdvoji \u00fa\u017eitkov\u00fdch vozidiel zna\u010dky Mercedes-Benz. Aerodynamick\u00e9 opatrenia sa okrem toho overuj\u00fa aj pri pou\u017e\u00edvan\u00ed na cestn\u00fdch komunik\u00e1ci\u00e1ch. In\u017einieri tak profituj\u00fa z toho, \u017ee maj\u00fa k dispoz\u00edcii hne\u010f nieko\u013eko v\u00fdkonn\u00fdch postupov, v\u010faka ktor\u00fdm m\u00f4\u017eu navrhova\u0165 n\u00e1kladn\u00e9 motorov\u00e9 vozidl\u00e1 z dielne Mercedes-Benz tak aerodynamick\u00e9, ako je to len fyzicky mo\u017en\u00e9.<\/p>\n\n\n\n

Spolu za najlep\u0161ie rie\u0161enie: spolupr\u00e1ca s dizajn\u00e9rmi a kon\u0161trukt\u00e9rmi je z\u00e1sadn\u00e1<\/strong><\/p>\n\n\n\n

Pre pr\u00e1cu odborn\u00edkov z oblasti aerodynamiky je podstatn\u00e9, aby spolupracovali s kolegami z in\u00fdch d\u00f4le\u017eit\u00fdch oblast\u00ed, najm\u00e4 s dizajn\u00e9rmi a kon\u0161trukt\u00e9rmi. \u201eCie\u013eom v\u00fdvojov\u00e9ho procesu n\u00e1kladn\u00e9ho motorov\u00e9ho vozidla je n\u00e1js\u0165 spolu najlep\u0161ie mo\u017en\u00e9 rie\u0161enie,\u201c tvrd\u00ed Kai Sieber, ved\u00faci Design Brands & Operations zna\u010dky
Mercedes-Benz. \u201eNapr\u00edklad kamerov\u00e9 ramen\u00e1 syst\u00e9mu MirrorCam dod\u00e1vaj\u00fa celkov\u00e9mu vzh\u013eadu nov\u00e9ho modelu Actros puristick\u00fd charakter. Z vizu\u00e1lneho h\u013eadiska ide o obohatenie, preto\u017ee pozornos\u0165 u\u017e nebud\u00fa p\u00fata\u0165 ve\u013ek\u00e9 zrkadl\u00e1, ale spodn\u00e1 \u010das\u0165 vozidla. V\u00fdmena ve\u013ek\u00fdch zrkadiel za mal\u00e9 kamery tak prispeje nielen k lep\u0161ej spotrebe paliva, ale zv\u00fdrazn\u00ed aj dynamiku vozidla.\u201c<\/p>\n\n\n\n

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H\u013eadanie optima: forma a umiestnenie<\/strong><\/p>\n\n\n\n

Ako presne prispel t\u00edm pr\u00e1cou v aerodynamickom tuneli k lep\u0161ej aerodynamike nov\u00e9ho modelu Actros? Napr\u00edklad pokusmi, pri ktor\u00fdch ur\u010dili najlep\u0161ie umiestnenie kamerov\u00fdch ramien syst\u00e9mu MirrorCam. Diskutovalo sa o hornej i dolnej \u010dasti st\u013apikov A, ako aj hornej \u010dasti st\u013apikov B. Pri pokusoch sa vyu\u017e\u00edval skuto\u010dn\u00fd model Actros, ktor\u00e9ho vonkaj\u0161ie zrkadl\u00e1 sa vymenili za prototypy kamerov\u00fdch ramien \u2013 tie sa postupne umiest\u0148ovali na tri r\u00f4zne polohy, ktor\u00e9 sa n\u00e1sledne kontrolovali. N\u00e1kladn\u00e9 motorov\u00e9 vozidlo bolo umiestnen\u00e9 na v\u00e1hu vetern\u00e9ho tunela a n\u00e1sledne sa spustili ventil\u00e1tory. Stupnica umo\u017e\u0148uje in\u017einierom zmera\u0165 silu vzduchu, ktor\u00e1 pri obtekan\u00ed p\u00f4sob\u00ed na vozidlo. V\u00fdsledok: najlep\u0161ia mo\u017en\u00e1 poloha na umiestnenie kamerov\u00fdch ramien sa nach\u00e1dza na st\u013apikoch A v oblasti hrany strechy.<\/p>\n\n\n\n

H\u013eadalo sa aj rie\u0161enie na zabr\u00e1nenie toho, aby rozpt\u00fdlen\u00e9 svetlo dopadaj\u00face zvrchu zni\u017eovalo v\u00fdkon kamier. Pri t\u00fdchto testoch sa osved\u010dila mal\u00e1 strie\u0161ka, ktorou s\u00fa teraz vybaven\u00e9 ramen\u00e1 syst\u00e9mu MirrorCam. In\u017einieri tie\u017e zohrali k\u013e\u00fa\u010dov\u00fa \u00falohu pri v\u00fdvoji nov\u00fdch, konk\u00e1vnych odtrhov\u00fdch klapiek kab\u00edny vodi\u010da. Nov\u00e9 odtrhov\u00e9 klapky tie\u017e prispievaj\u00fa k tomu, \u017ee nov\u00fd Actros spotrebuje tak m\u00e1lo paliva ako \u017eiaden jeho predchodca.<\/p>\n\n\n\n

Zna\u010dn\u00fd pokrok: lep\u0161\u00ed preh\u013ead, viac bezpe\u010dnosti<\/strong><\/p>\n\n\n\n

In\u017einieri mali pri pokusoch v aerodynamickom tuneli a CFD anal\u00fdzach na pam\u00e4ti nielen najni\u017e\u0161iu mo\u017en\u00fa spotrebu paliva, ale aj ochranu pred zne\u010disten\u00edm. A to najm\u00e4 v pr\u00edpade oblast\u00ed, ktor\u00e9 s\u00fa v\u00fdznamn\u00e9 z h\u013eadiska bezpe\u010dnosti, ako napr\u00edklad \u010deln\u00e9 a bo\u010dn\u00e9 okn\u00e1, \u010di \u0161o\u0161ovky kamerov\u00fdch ramien. Aerodynamika vpl\u00fdva aj na to, ko\u013eko ne\u010dist\u00f4t zo samotn\u00e9ho vozidla alebo z vozidiel id\u00facich vpredu sa na vozidle zachyt\u00ed.<\/p>\n\n\n\n

V prev\u00e1dzke u\u017e po cel\u00e9 desa\u0165ro\u010dia: aerodynamick\u00fd tunel v Untert\u00fcrkheime<\/strong><\/p>\n\n\n\n

Aerodynamick\u00fd tunel v Untert\u00fcrkheime maj\u00fa v\u00fdvoj\u00e1ri zna\u010dky Mercedes-Benz k dispoz\u00edcii u\u017e osem desa\u0165ro\u010d\u00ed. V\u010faka cielenej moderniz\u00e1cii je v\u017edy v stave, ktor\u00fd zodpoved\u00e1 aktu\u00e1lnemu technick\u00e9ho pokroku. Dva motory na jednosmern\u00fd pr\u00fad, z ktor\u00fdch ka\u017ed\u00fd poskytuje v\u00fdkon 250 kW, uv\u00e1dzaj\u00fa do pohybu axi\u00e1lny ventil\u00e1tor s deviatimi lopatkami a priemerom 8,5 metra \u2013 poskytuje tak\u00fa silu, \u017ee s\u00e1m dok\u00e1\u017ee vyvin\u00fa\u0165 silu vetra na \u00farovni 17. Ke\u010f je ventil\u00e1tor zapnut\u00fd, horizont\u00e1lne pres\u00fava pribli\u017ene 9 000 m3 vzduchu do prstencovit\u00e9ho tunelu s d\u013a\u017ekou 125 metrov. V testovacej \u010dasti stoj\u00ed vozidlo na oto\u010dnom kot\u00fa\u010di s priemerom dvan\u00e1s\u0165 metrov, aby mohlo by\u0165 vystaven\u00e9 vetru spredu, ale aj zboku, a to v akomko\u013evek po\u017eadovanom uhle. Do oto\u010dn\u00e9ho kot\u00fa\u010da je okrem valcov\u00e9ho dynamometra integrovan\u00e1 aj \u0161es\u0165prvkov\u00e1 v\u00e1ha. Sl\u00fa\u017ei na mimoriadne presn\u00e9 ur\u010dovanie nieko\u013ek\u00fdch s\u00edl, okrem in\u00fdch aj sily vetra. Sily sa pren\u00e1\u0161aj\u00fa na silomern\u00e9 d\u00f3zy prostredn\u00edctvom p\u00e1k a s\u00faty\u010dia, v\u010faka \u010domu ich mo\u017eno n\u00e1sledne vyhodnoti\u0165.<\/p>\n\n\n\n

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    \u0160pi\u010dkov\u00e9 ocenenie: nov\u00fd Actros dostal ocenenie\u201eInternational Truck of the Year 2020\u201c<\/strong><\/p>\n\n\n\n

    Trvalo udr\u017eate\u013ene zlep\u0161en\u00e1 aerodynamika prostredn\u00edctvom syst\u00e9mu MirrorCam nov\u00e9ho modelu Actros je jedn\u00fdm z d\u00f4vodov, v\u010faka ktor\u00fdm z\u00edskalo vozidlo titul \u201eInternational Truck of the Year 2020\u201c. Okrem zv\u00fd\u0161enej efekt\u00edvnosti vyzdvihla porota tohto najd\u00f4le\u017eitej\u0161ieho eur\u00f3pskeho ocenenia n\u00e1kladn\u00fdch motorov\u00fdch vozidiel aj pokroky v oblasti asisten\u010dn\u00fdch a bezpe\u010dnostn\u00fdch syst\u00e9mov, ako aj v oblasti konektivity. Medzi nov\u00e9 funkcie modelu Actros patr\u00ed okrem in\u00e9ho syst\u00e9m Active Drive Assist, ktor\u00fd umo\u017e\u0148uje \u010diasto\u010dne automatizovan\u00e9 jazdenie vo v\u0161etk\u00fdch rozsahoch r\u00fdchlosti, vylep\u0161en\u00fd asistent n\u00fadzov\u00e9ho brzdenia ozna\u010dovan\u00fd ako akt\u00edvny asistent brzdenia 5, kompletne prepojen\u00fd multimedi\u00e1lny kokpit, ako aj inteligentn\u00e9 riadenie tempomatu a prevodovky s n\u00e1zvom predikt\u00edvna strat\u00e9gia jazdy. Ocenenie \u201eInternational Truck of the Year\u201c ka\u017edoro\u010dne ude\u013euj\u00fa popredn\u00ed eur\u00f3pski novin\u00e1ri zameriavaj\u00faci sa na \u00fa\u017eitkov\u00e9 vozidl\u00e1. Mercedes-Benz je v hist\u00f3rii tejto s\u00fa\u0165a\u017ee najoce\u0148ovanej\u0161ou zna\u010dkou, ktor\u00e1 zo\u017eala \u00faspech aj so v\u0161etk\u00fdmi predo\u0161l\u00fdmi verziami modelu Actros.<\/p>\n","protected":false},"excerpt":{"rendered":"

    V porovnan\u00ed s predchodcom a\u017e o p\u00e4\u0165 percent ni\u017e\u0161ia spotreba \u2013 nov\u00fd Actros je efekt\u00edvnej\u0161\u00ed ne\u017e kedyko\u013evek predt\u00fdm. So syst\u00e9mom MirrorCam a konk\u00e1vnymi odtrhov\u00fdmi klapkami: aerodynamick\u00e1 kab\u00edna vodi\u010da vo ve\u013ekej miere prispieva k ni\u017e\u0161ej spotrebe paliva. Zlep\u0161enie aerodynamiky sa dosiahlo na po\u010d\u00edta\u010di, v aerodynamickom tuneli a na ceste. Spotreba paliva modelu Actros sa za posledn\u00e9 […]<\/p>\n","protected":false},"author":1,"featured_media":28233,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1604],"tags":[],"class_list":["post-28230","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mercedes-benz-uzitkove-vozidla-a-autobusy"],"translation":{"provider":"WPGlobus","version":"3.0.0","language":"en","enabled_languages":["sk","en","de"],"languages":{"sk":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":false,"excerpt":false},"de":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/posts\/28230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/comments?post=28230"}],"version-history":[{"count":1,"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/posts\/28230\/revisions"}],"predecessor-version":[{"id":28238,"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/posts\/28230\/revisions\/28238"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/media\/28233"}],"wp:attachment":[{"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/media?parent=28230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/categories?post=28230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mixmotor.eu\/en\/wp-json\/wp\/v2\/tags?post=28230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}