Ingabe kuwufanele ukufudumeza injini ebusika
Ingqikithi yaphakade yesidingo sokufudumeza injini ebusika. Cishe kunemibono eminingi kulokhu ngaphandle kwezinkanyezi esibhakabhakeni. Kuliqiniso, lesi sihloko kukhulunywa ngaso ngabantu abakude kakhulu nokwenziwa ngcono kwezinjini zezimoto. Kepha ucabangani umuntu owakha futhi enze ngcono izinjini zemijaho enkampanini yaseMelika i-ECR Engines? Igama lakhe nguDkt. Andy Randolph futhi udizayina izinjini zochungechunge lweNASCAR.
Unjiniyela uphawula ukuthi injini ebandayo ihlushwa yizici ezimbili. Okokuqala, emazingeni okushisa aphansi kakhulu, i-viscosity kawoyela wenjini iyanda. Abakhiqizi bakawoyela bayixazulula kancane le nkinga, cishe, ngokuxuba izinto ezinezici ezihlukile ze-viscosity: eyodwa enenkomba ephansi ye-viscosity, kanti enye enenkomba ephezulu ye-viscosity. Ngakho-ke, kutholakala uwoyela ongalahlekelwa yimpahla yawo emazingeni okushisa aphansi noma aphezulu. Kodwa-ke, lokhu akusho ukuthi i-viscosity kawoyela ayinyuki ngokushisa okunciphile.
Esimweni sezulu esibandayo, uwoyela ohlelweni lokuthambisa uyajiya, futhi ukuhamba kwawo emigqeni kawoyela kuba nzima. Ikakhulukazi uma injini ine-mileage ephezulu. Lokhu kuholela ekuthambekeni okwanele kwezinye izingxenye ezihambayo kuze kube yilapho ibhlokhi nenjini kanye nofutha uqobo kushisa. Ngaphezu kwalokho, ipompo likawoyela lingangena ngisho nakwimodi ye-cavitation lapho iqala ukumunca umoya (lokhu kwenzeka lapho izinga lokumpompa uwoyela ovela empompa liba ngaphezu komthamo womugqa wokudonsa).
Inkinga yesibili, ngokusho kukaDkt Randolph, i-aluminium izinjini eziningi zesimanje ezakhiwe ngayo. I-coefficient yokunwetshwa kwe-thermal ye-aluminium iphakeme kakhulu kune-cast iron. Lokhu kusho ukuthi uma ifudunyezwa futhi ipholile, i-aluminium iyakhula futhi isebenze kakhulu kune-cast iron. Inkinga enkulu kuleli cala ukuthi i-injini block yenziwe nge-aluminium kanye ne-crankshaft yenziwe ngensimbi. Kwenzeka ukuthi esimweni sezulu esibandayo i-block icindezela kakhulu kune-crankshaft, futhi i-shaft bear ihlala iqinile kunalokho okufanele. Uma sikhuluma nje, "ukucindezela" kwenjini yonke kanye nokwehliswa kwezimvume kuholela ekwandeni kokungqubuzana kwezingxenye ezihambayo zenjini ngokumelene nomunye. Isimo sithuthukiswa ngamafutha e-viscous, angakwazi ukunikeza ukugcoba okwanele.
UDkt Randolph weluleka ngokuqinisekile ukufudumeza injini imizuzu embalwa ngaphambi kokuqala. Kepha lokhu kumane nje kuyimbono. Kodwa ingabe injini iguga kangakanani uma umshayeli ojwayelekile eqala imoto njalo ebusika nsuku zonke ngokushesha nje lapho eyiqala? Kepha kuthiwani ngombono wochwepheshe abahlonishwayo abathi ukufudumeza injini ende kuyalimaza nje?
Eqinisweni, asikho isidingo sokuma singenzi lutho imizuzu engu-10-15, amafutha athatha isikhathi esiphezulu semizuzu engu-3-5 ukuze afinyelele izinga lokushisa lokusebenza, kuye ngokuthi uhlobo lwamafutha ngokwalo. Uma ngaphandle kwama-degrees angu-20, kuzodingeka ulinde imizuzu emi-5 - amafutha amaningi adinga ukushisa afike kuma-degree angu-20, okwanele ukugcotshwa kwenjini okudingekayo.
