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Umsebenzi Wokugcwele Wekhomodi Yekinithiyo ekusabela Kukukhuni
Kusuka kusihlabelo sokwanda okuncane ukuya kusihlabelo sezimali ephakeme: umdodi wokuguquka izimali ekhomodi yekinithiyo
I-ignition module isebenza njengendawo eyinhloko yokuxhuma phakathi kohlelo olujwayelekile lukagesi lwama-volt angu-12 nemibani enamandla edingekayo ukuze kuvuthwe uphethiloli enjini. La ma-module ancike ku-solid state electronics ukuze aphendule amandla ageleza ngokusebenzisa i-coil yokuqala yokuvutha. Lapho lokhu kwenzeka, insimu kazibuthe iyawa ngokuzumayo, idale ukwanda okukhulu kwamandla kagesi emgqeni wesibili ngokuvamile endaweni ethile engaphezu kwamavolt ayizinkulungwane ezingu-30. Lolu hlelo lonke seluthathe indawo yamaphuzu okuxhumana amadala angomshini ayegcina esegugile ngokuhamba kwesikhathi, okubangela izinkinga zesikhathi. Inzuzo? Isikhathi sokukhanya sihlala sinjalo kuze kube sezingeni le-microsecond. Amamojula amaningi okucisha anamuhla angahlala esebenza ngokwethenjelwa isikhathi esingaphezu kweziyingi ezingu-100 000 ngaphambi kokuba abonise izimpawu zokugqoka noma ukwehla kokusebenza.
Indlela ukunemba kwesikhathi, izinga lokwenyuka kwamandla kagesi, nokulawula ukuhlala okuyiyo okuyiyo ethinta ngqo ukwakheka kwe-flame kernel
Ukuma kwe-flame kernel kusohlwa yezinhliziyo ezintathu ezigcinelwe ngokucophelela ezilawulwa ngu-ignition module:
- Ubunzima bokulawula isikhathi (±0.1° crank angle): Kubalulekile kumsebenzi wase-CNG othile, lapho izikhathi zokulawula zimfushane—ezinikwe nge-~40% kunagasiyeni—zikudinga ukulawulwa okucophelela nokuhlanganiswa kwesiphindelo
- Isilinganiso sokuthanda kwe-voltage (>1 kV/µs): Iqinisekisa ukuthembeka okuphathelene kwe-spark gap nakuba kukhona izinguquko zesiphindo se-cylinder edlula kuya ku-300 psi
- Ukulawula kwe-dwell (1.5–3.5 ms): Kuguquka isikhathi sangempela yecoil ngokushintsha ukuze sihlele ≥3.0 mJ yemvuselo yespark ethintele indiza yethermal
Idatha ye-field engenjiswe ngu-EPA kumahluko wezimali zegesi ibonisa ukuthi izinguquko ezingaphezu kwe-5% konke lezo zinhliziyo zakhishwa ukuphindwa kwe-misfire ku-17—ngemeko ye-EGR-diluted, lean-burn—lokhu kubonakala ukuthi ngani imodi ebasekwe kwi-microprocessor iyafika ku-99.97% yokuthintana kokulawula umlilo noma ngokuthi λ = 1.6.
Izinga Lemvuselo Yesandla Ye-Ignition Uma Kulawulwa Okwamandla CNG
Umbono kungani ukuthi igesi yenza ikhishwa kudinga imini yezimali ezingu-2 kuze kube ngu-3 ukuze ivuleke ngokulinganayo kungasembenzini singasetyenziswa sikhetho sokugcina, kuyindlela yokuba kukhona izinto ezimbili. Okokuqala, i-CNG isabela ngokusheshayo kunasembenzini, ngehamu eqondene ne-0.38 maphuthelane ngosuku ngaphandle kwe-0.8 m/s yesembenzini. Kananjalo, kukhona into engumhlaba wokuhlabeleka okukhulu kune-CNG esikhundleni se-5 kuya ku-15 iphesenti ngaphandle kuka-1.4 kuya ku-7.6 iphesenti yesembenzini. Ngaphezu koko, xa zonke izinto ziphakamisa kakhulu futhi ziphazamisekile kakhulu kumjikelezo wasentonga, i-CNG iyisabelo esikhulu kakhulu ekuphazamiseni konke. Zonke lezi ziqiniso zibiza ukuthi amabhlagi azidinga ukusebenza ngokwengeziwe futhi ngokudala ukuze avuleke umlilo oqobo futhi aqiniseke ukuthi usemthethweni njengoba usabela, ikakhulukazi emashinini manje apho izilinganiso zokudilutha ziyalingana kakhulu.
Izilinganiso zepraktiki: 2.5–4.5 mJ ukuvula umlilo we-CNG ngokwesivumelwano, phakathi kokudilutha okuphezulu
Izebeka ezivuliwe ngomqondo—kangangokuba kuthiwa ngu SAE International Technical Paper 2021-01-0556—kuthiwa ukuthobha okuthembekile kwe-CNG kudinga amajoule 2.5–4.5 akhokhelwe. Lokhu kakhulu kuthola kusisiguquli esithathu esihlotshaniswa:
- Amalungiso okulahlela : Ukunzulu kweyokuhla kunciphisa ukusebenzisana kwesilinganiso, kugcinwa isikhathi esidinga ukuthuthukisa ukuthuthukisa
- Ukuciphisa kwesilinganiso : I-EGR ikhokha amandla okuthiqa ngama 30–40% ngokunciphisa indawo yomumo kanye nesilinganiso sezigaba,
- Amadoda wokugcinwa : Amamodi okuphakathi okuphakade akhokha amandla wokuthiqa kakhulu kune 300 psi, kakhokha amandla wokungcolwa kanye nokuthintana kokuqala kokuthobha
Ukuze kutholelele lokhu, amakhodi okuthiqa akamva athuthukisa amathuba amaninzi kanye nemini ephakathi yokuthiqa (>1.5 ms), ukuze kuthobhe kakhulu noma kungezikhathi zokuhla kungaphezulu kuka λ = 1.5.
Ummini Wokuthiqa Nencazelo Yalo Kukuthobha Okuthembekile
Ummini wokuthiqa (1.2–2.0 ms) okulungileyo ukuthuthukisa ukuthobha kokuqala kumakhala amagasi
Xa kusebenziswa nezimbi ezikhanyayo njengegasi eligcinwe (CNG), ukugcwalisa kufanele kube khona ngeminyaka engaphezu koko ekuchazwe kangempela kumotora wengasoli xa sifuna ukuthuthuka okuphathelene kwesibindi. Ngokwesiqephu se-International Journal of Engine Research, ngaphakathi kwe-1.2 kuya ku-2 milisekhi kuyadeleka kakhulu ukuthi kube khona ukugcina okuphathelene xa kusebenzisa izilinganiso ezingaphansi ngezimali eziningi. Isikhathi esingenhla sinesizo ekulungiseni i-CNG incazelo yayo yobudlalelo bokubilawo fasonkelela lezi zibindi eziphezulu ukuthi zingene phansi ngaphambi kokuba kuzocindezeka isimo sokushisa noma ubukhuni. Uma izigcawu ziphansi kune-1.2 milisekhi, izinkinga ziya kuhlala zibanjwa kanye nokungafani komsebenzi womotora nokubilawa akuphumelelanga. Lokhu kuguqula kakhulu emehlweni apho kukhona indiza yokunyusa noma izinhlelo zokubuyisela igazi eliphelile ngasekhaya edolobheni le-CNG.
Ukulungana phakathi kokude kokuqhuba, amathambo ophawu okushisa, nokuphatha kakhulu kwemodiwuli
Ukugcwalisa isparkhi ngaphezu kwe-2.0 ms kuvelisa izinkinga eziphathelene nokulungiswa kwemfundo:
- Ukuqakala kwe-coil : Isikhathi esifinyezwa se-0.5 ms sibuyisela ukuphakama kwe-temperature ye-coil ngama-40°C, kubanzi kakhulu umehluko wokulinganisa kanye nokuchaza okuphazanyayo
- Ukulahlekelwa kwe-module : Isikhathi eside sokudluliswa kwe-current kuthuthukisa ukulahlekelwa kwe-semiconductor, ikakhulu kwi-driver ezisebenzisa IGBT noma MOSFET ezenzekelayo emsebenzini wabo owodwa kakhulu
- Ukunciphisa kwegcawu le-spark : Izikhathi ezide zicacisa ukuphazanyeka kwe-voltage, kucincisa igcawu eliphezulu le-spark futhi kungenza ukuthi akwazi ukujabulalana phakathi kwezimo eziningi kakhulu
Amakhodi we-ignition avamile anquma lezi zinkinga ngokulandela kusiqalelo kanye nezindlela ezivuselelayo zeqiniso—lokho kuhlengele ukuba isenzo siyasebenza ngaphandle kokulahleka kakhulu kwesikhathi eside.
Imibuzo Evame Ukubuzwa
Yini indima eyisiseko ye-ignition module?
I-ignition module ihlangana nesayithi samanzi se-automobile nendlela eyadingekayo yokuvula amanzi kumotara, ibe yizindlela eziphansi zokushisa kube yizinkunzi ezinezizenzo eziphakeme.
Kungani ukuthatha kancane kwezindlela kudingeka kakhulu kunjalo kwegasoline?
Ukuthatha kancane kudingeka kakhulu ngokuthi kuthatha kancane, kunezindlela eziningi, kwanokuthi kuhlase kugcinekile kakhulu kumaqondo amancane noma amadulayo.
Kungani ubude bekhipha kibalulekile kwezindlela?
Ubude obude bekhipha buqinisekisa ukuvulekile kwezindlela ngokuthi kuthuthukise kakhulu kwezindlela kancane kanye nokuthuthukisa okuqala kwesithixo, ikakhulu kumathuba amancane.