Kusho ukuthini "ikhamera ekabili"?
Ukuthengisa kuyingxenye ebalulekile yokuthengiswa kwezimoto. Kungakhathaliseki ukuthi ikhangisa i-Chevrolet big block V8 "njengenjini yamagundane" noma "i-six-cylinder Hemi", abathengi bavame ukukhangwa imikhiqizo yezimoto noma izingxenye ezinegama lomkhiqizo elidala kunezinzuzo ezithile zomkhiqizo. Esinye seziteketiso esivame ukuqondwa kabi ukucushwa kwe-twin cam engine. Nakuba sezivame kakhulu ezimotweni namaloli esimanje, abathengi abaningi abazi ukuthi lisho ukuthini ngempela noma lisetshenziselwani.
Okubhalwe ngezansi amanye amaqiniso mayelana nokuthi iyini injini ye-twin cam, ukuthi isebenza kanjani, kanye nezinzuzo zokuyisebenzisa ezinjinini zesimanje zemoto, iloli, ne-SUV.
Ukuchaza Ukucushwa Kwekhamera Ekabili
Injini evuthayo yangaphakathi eshayelwa nge-piston ine-crankshaft eyodwa eshayela ama-piston nezinduku zokuxhuma ezixhunywe ngeketango ku-camshaft eyodwa evula futhi ivale ama-valve okudonsa nawokukhipha ngesikhathi senqubo ye-four-stroke. I-camshaft ayikho ngaphezu kwamasilinda noma eduze kwama-valve ngokwawo, futhi ama-tappets asetshenziselwa ukuvula nokuvala ama-valve.
Injini ye-twin cam inama-camshaft amabili, ikakhulukazi i-camshaft ephezulu ephindwe kabili noma i-DOHC, enquma indawo yesitimela se-valve. Nakuba kuzwakala kupholile ukusho ukuthi unenjini ye-twin cam, akusiyo isikhathi esilungile ngaso sonke isikhathi.
Enjinini enamakhamera amabili, ama-camshaft amabili atholakala ngaphakathi kwekhanda le-cylinder, elitholakala ngaphezu kwamasilinda. I-camshaft eyodwa ilawula ama-valve okungenisa kanti enye ilawula ama-valve okukhipha umoya. Injini ye-DOHC inezici ezimbalwa ezihlukile ekwakhiweni kwayo. Isibonelo, izingalo ze-rocker zincane noma kungenzeka zingabikho ngokuphelele. I-engeli ebanzi ibonakala phakathi kwezinhlobo ezimbili zama-valve kune-camshaft eyodwa engaphezulu noma i-SOHC.
Izinjini eziningi ze-DOHC zinamavalvu amaningi kusilinda ngasinye, nakuba lokhu kungadingeki ukuze injini isebenze. Ngokwethiyori, ama-valve engeziwe isilinda ngasinye athuthukisa amandla enjini ngaphandle kokukhuphula ukugeleza komoya. Empeleni, lokhu akulona iqiniso ngaso sonke isikhathi. Kuncike ngempela ekucushweni kwenjini ukuthi lolu hlobo lokufakwa kwekhanda le-cylinder luyoba usizo.
Izinzuzo Zekhamera Ekabili
Ochwepheshe bemishini bayavuma ukuthi indlela engcono kakhulu yokuthuthukisa ukusebenza kwenjini iwukuqinisekisa ukugeleza komoya okuhle ngamakhanda amasilinda. Nakuba izitolo eziningi zezinjini zenza lokhu ngokwandisa ama-valve okukhiphayo nawokukhipha umoya, ama-manifolds, nokupholisha amagumbi ukuze ageleze kahle, abakhiqizi bezimoto basebenzise ukumiswa kwe-multi-valve-cylinder per-cylinder. Idizayini ye-DOHC ivumela ukugeleza komoya okuncane okukhawulelwe ngesivinini esiphezulu. Uma injini nayo inomklamo onama-valve amaningi, iphinde yathuthukisa amandla okushisa ukuze kuthuthukiswe ukusebenza kahle ngenxa yokubekwa kwe-spark plug.
Ngenxa yokuthi i-DOHC noma izinjini zama-twin cam ziye zathuthukisa ukugeleza komoya ngamasilinda, zivame ukuba namandla kakhulu ngokuqhathaniswa futhi zinikeze ukusheshisa okungcono. Bangaphinde bathuthukise ukusebenza kahle, okusho ukonga imali egalaji likaphethiloli. Ngaphezu kwalokho, izinjini ze-DOHC zivame ukusebenza ngokuthula nangokushelela. Namuhla, ama-twin cam engines ayatholakala ngezinhlobo eziningi zezimoto, kusukela kuma-hatchback asezingeni lokungena kuya ezimotweni zezemidlalo ezithuthukisa ukusebenza.
