Indima Yokuqondisa i-Fuel Pressure Sensor Ekupheleni Kwezinkambo Zokufaka

Izinkomba Zokubala Kwemithwana Yomshini: Indima, Indawo, Nokuhlanganiswa Kwe-ECU Ngokushesha Kwezinsuku

Indima esiphambili: ukuguqula imithwana yomshini yokuqondisa ku-voltage ephakeme kwe-ECM/PCM

Izinhlobo zezikhombi zokuphakama kwemoto zisebenza ngokubizwa njengamathuba amahle okuhlela, apho kushicilekwe izikhombi zokugqibela noma izikhombi zokugqibela ngokwesibonelo esihle ukuthi zibuyeke isibonelo sesikhombi sokuphakama kwemoto ngokwesibonelo sesikhombi esisodwa (ngokuvamile phakathi kwe-0.5 volts kunye ne-4.5 volts). Lamanje eminye imithombo yezinkampani eziphakamile, lezi zikhombi zingakhumbula izinguquko eziningi kakhulu. Isibonelo, zibhekisa phakathi kwe-50 kunye ne-3,000 pounds per square inch emoto yamagasi ezinkampani ezigcina ngokwesibonelo, futhi ngamanye amazwi zingakhumbula ukuphakama okufika ku-30,000 psi noma kude kakhulu emoto yamadhezeli engeziwe ngokwesibonelo. Ulimi lwezikhombi zilapha ngqo ekhompyutha yomoto, okuyizithu zokugcina i-ECM noma i-PCM ngokwahlukahluka kwezinhlobo zezinkampani, okuyoba yilokho okwenza izinyathelo ezinkulu ngokushesha kakhulu kuzo zizindlela zokuthumela imoto. Uma izikhombi asebenzi kahle, ikhompyutha yemoto ibegcina ukuthi kusobala ukuthi kunezinkinga zokuthi kuyisibonelo sezinkampani zokuphakama kanye nezinkampani zokuphakama, okuya kubangela ukuthi kubhekiswe kwezinkampani zokuphakama kanye nezinkampani zokuphakama kahle kusukela kuze kubekwe kungabiyo ukuthi kunezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphakama kanye nezinkinga zokuphak......

Ukubeka kwezinkambo ngokuzimisela kwe-rail yokufaka amandla ngumbala wokuthumela—futhi ukuthi lokhu kukhomba ukuthi indawo iyadetermina ukuthi umlando wokubiza uyabonakala njani kumkhiqizo wokuphatha ukusebenza kwamandla

Indlela okufakwa ngayo amasensha ayisiqulelo esikhundleni sokufaka kuphela—kuyinto eyodwa yomsebenzi wokuhlela. Uma kufakwa ngqo emaphakathini wezilwane zokufaka umnqubelo, le masensha abona konke amagugu okuguqula ukuphakama ngokuchanekileyo ngalunye ulwandle lwemotora, futhi abona amagugu okuguqula okukhula okugcina ngokushesha ekuphakamiseni kwezilwane zokufaka umnqubelo kabili noma ngaphezu kwalokho. Ukuba kufakwa ngqo kusukela kuyabona amagugu okuguqula angu-2% ngalunye usuku, lokhu kuyenza ukuthi i-ECU iyasebenza ngokushesha kune-milliseconds engu-100 kuziningi kwezikhathi. Uma kufakwa isensha esinye esikhundleni sesilinda sokufaka umnqubelo, kuyabona kuphela izincazelo zokuphakama zokuphakamisa kahle. Lokhu kususa isikhathi sokuphendula kwe-ECU ngaphakathi kwe-milliseconds engu-300 kuya ku-500 futhi kususa izinkinga ezithile zezilwane zokufaka umnqubelo zonke. Ukudelaya kuyadlula ukusebenza kwemotora ngokuphakamisa kahle ngoba uma ukuphendula kufika kushesha kakhulu, imotora ibhala ngokuphakamisa kahle kunezidingo. Izifundo zase-SAE International zikubeka lokhu kusukela kubonisa ukuthi kuyadlula ukuphakamisa kahle phakathi kwe-3% kuya ku-7% uma amasensha akafakwanga ngokulinganayo.

Indlela Yokubhala I-Feedback Yokufuna Amaphutha: Indlela Yokusebenzisa Imbonakalo Yokuphepha Okuphephile Ekuvumelana Nokuphuma Kwamaphutha

Ukuhlanganisa kwezikhathi zokugcina: Izindlela zokuhlela i-ECU zokuguqula ubude bakho lokufaka, isikhathi, nokuseta kwesikhathi sokuphepha kwe-rail ngokuvumela ukungena kwesensha

Izinqambu zokuphakama kwemithambo yomoto ziyasebenza njengomunye wamaphakathi amakhulu okusetyenziswa ngokufanayo ngu-ECU (engine control unit) ekuphatheni ukuzimela kwezindlela zokuphatha izinkulungwane. I-ECU iyajabula ngokuphelele ukuthi iphakama le-rail engeziwe liyahluka kanjani kuleyo iphakama eliphindwe ngokubhekisele kwezinye izinto ezithile njengokusebenza kwemoto, izikhathi zokuphatha kwezinsuku, izinhloko zokugcina amandla, izinhloko zokugcina amandla wesikili, futhi nangokuthi umthwalo wokuphakama kwemithambo uyisiphi. Kusukela kulesibonelo, isistimu ishintsha izikhathi zokuhambisa imithambo futhi ishintsha isikhathi sokuhambisa imithambo, futhi ishintsha isiphumo sesithombe sokuphakama kakhulu. Lokhu kubiza ukuthi isistimu yokubuyela kumkhiqizo isivumela ukuthi ishinte izinkulungwane zokuhambisa imithambo ngokuphelele futhi isivumela ukuthi ishinte isikhathi sokuphakama kwezinkulungwane, ukuze umoto ushale ngokuphelele ngokuphakama kwe-air-fuel noma ngokuphakama okulingana nokuthi kufanele kube phakade kwezinkulungwane zokuphakama okuncane. Izinqambu zokuphakama eziphelele zingadingeka ngoba zivumela i-ECU ukukhupha imithambo eyodwa njengokuvikela, okuvikela imali yokuphakama kwezinkulungwane futhi ekhupha imithambo emihle ngokuphelele kwezinhloko zokuphakama zokushaya.

Iziphumo zokuhlanzwa: indlela ofakwa kuzo ukungafani kwe-pressure ngama-±5% kubuyela ku-3–7% yokungabi nesifundo sokusebenza kwemoto ngokungafanisi kwe-combustion nokubeka kwemoto ngokufana

Kodwa uma kukho ukungafani ngama-5% kwezindlela zokubala kwempilo, kuyabegina umgqa wokukhula okuhambisana nomsebenzi. I-Engine Control Unit ibona lezinombolo ezincane njengoba akukho impilo engaphakathi kwezindlu zemoto. Ngakho ke, yenza izilungiselelo ngokubheka isikhathi sokuvulwa kwemithombo yokuvala nokuphanda okuphakeme kwemoto. Ngokucacile, lokhu kubuyela kuthi kubeka imoto ngaphezu kwekufanele kumoto. Okulandela kuyizindlela zokungafanisi kwe-combustion, izibonakaliso zemoto ziyadlala ngaphakathi, nokubheka kwezinkundla zemoto. Ukuze kwenziwe ubumbano, isistimu isebenza ngokubeka imoto ngaphezu kwekufanele. Isifundo sokusebenza kwemoto siphila phakathi kwe-3 kuya ku-7% ngokugcwele. Amoto ase-Gasoline Direct Injection nezindlu zemoto zase-Common Rail Diesel zihlukaniswa kakhulu ngoba zisebenza ngamaphuzu amancane futhi abaphatha kakhulu ukuthi imoto iyahluka ngokufanele ukuze iphumelele.

Ukuhambisana Kwesistimu: Kungani Ukupheleka Kwesensithi Yempilo Yemithwisi Kubalulekile Kangaka Kusetyenziswa Kwesistimu Yokuqondisa Emithwisini (GDI) Nezistimu Zemithwisi Yezilwane Zokudla Ngokujwayelekile

Ukubaluleka Kwempilo Yemithwisi Kuphakeme: iziqephu ezingaphakeme zempilo yemithwisi nezinqamuzana eziningi zokusebenza ngokupheleka

Amashini we-gasoline ephakamisa ngqo amandla angaphakathi kwezinkinga zokuphakama phakathi kwe-500 ne-3,000 pounds per square inch. Even small changes in sensor readings can mess with how fuel sprays into the combustion chamber, affecting droplet size and when the fuel actually starts to burn. Uma izenzekelwano zingaphansi okanye zingaphezulu ngo-5 percent kuphela, ishini liyasebenza ngendlela engeyona yobukhulu ngoba libuyela emuva kwalokho okuhle kakhulu. Lokhu kubangela ukungafanisi kwezinkulungwane zokufaka umshini futhi kubangela ukuthi kubhekene nesibindi sokuzikhipha kwe-hydrocarbons esingafani. Ngokulandela izifundo ezabhalwe ngu-SAE International ngo-2023, lezi zifundo zizibonisa ukuthi ukugcina amandla kusenziwa ngokulingana nokuthi kubhekene ne-3 ku-7 percent kungcono kakhulu, kodwa kompyutha yomoto ayithi inkulumo yokuqinisekisa. Ukuguqula kwesikhundla kwenkulumo kubhekene nalokho okungaba yindawo eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa eyodwa ey......

Ukubaluleka kwezinkulungwane zokusebenza kwe-diesel ephakamisa ngqo: indlela yokuphakama ekubalulekile kakhulu ukunciphula isibindi sokuzikhipha, i-NOx, nokugcina amandla ngokufanana

Ukuze izinjini zesilinda sediesel zisemthethweni, kufuneka kubekho ubukhulu bephresha engaphansi kwe-1% nangona iphresha iyaphika ngaphezulu kwe-30,000 PSI. Lokhu kusiza injini ukwenza izinyathelo zokuhambisa isilinda eziningi ngokuthembekileyo ngalenyathelo. Uma izisensor zibonisa imininingwane emihle kwi-ECU, kuyakwazi ukuphatha lezi zinyathelo zokuhambisa (pilot shots), izinyathelo zokuhambisa okuphambili (main injections), nezinyathelo zokuhambisa emuva (post injections) ozokunciphisa amasooti ne-oxides yaseNithrojheni ngokuhlula ukusebenzisa isilinda. Uma imininingwane ayikho kahle, konke kufa. Izinyathelo zokuhambisa ezingavumelekileyo zidlula kuzoba kubhekise amasooti ngokuphakeme kwe-15 ku-30%, zidlula kuzoba kubhekise amasooti aseNithrojheni (NOx) ngokuphakeme kwe-8 ku-12%, futhi zidlula kuzoba kubhekise isilinda ngokuphakeme kwe-3 ku-5%. Okubi kakhulu kukuthi imininingwane eyingavumelekileyo yephresha ibe yisibopho sokulungisa ukugcina amasooti emuva kwesikhathi. Iyenza ukuthi izinhlangano zokubuyela umoya wokushisa (exhaust gas recirculation systems) zibe zingamthembekile, futhi ibeka ubukhulu obungafanele kwezinhlangano zokulungisa umoya wokushisa (selective catalytic reduction catalysts). Lokhu akuyiyo kuphela kubeka izinkinga ekufaneni nemithetho, kodwa futhi kunciphisa isikhathi sokusebenza kwezinhlangano lezi phambi kokubuyiselwa ngokujwayelekileyo njengoba kubhalwe e-DieselTech Magazine uMashi 2024.

Ukuchaza Ukungafaneleka Kwemali Yokufaka Isibonelo: Ukubona Ukuphela Kwesibonelo Sokuchaza Iphresha Yemithwalo Phambi Kokugcina

Izisensor zokuphefumula kwesithuthi kahle akasemthinti kusenqaba. Kodwa, kubizwa ngokuvutha kancane kancane, futhi abaningi abantu bafunda lokhu kuqala lapho ibhili yabo isebenza ngokungafanele kakhulu kusukela kufika emva kwezinkulungwane ezingu-10 uye kwezinkulungwane ezingu-15. Lokhu okusemva kuyisikhathi sokuzwa ngokwesayensi. Isensor isibonisa ukuphefumula okungu-ncane kunalo okuthile, ngakho-ke i-Engine Control Unit ithi kufanele ikhuphe isithuthi kabanzi kuleli qembu. Lokhu kubangela ukuthi izinjekshini zihamba kude kakhulu futhi ipampu yesithuthi ihlale isebenza ngokushaya kakhulu kunezidingo. Umphumela? Izinkinga eziningi okunokubaluleka ukuzwa ngokujwayelekile. Ukususa kusenqaba kubaluleka kakhulu, kubona isibhamu esibomvu esihambisa emuva kwebhili lapho ushaya umkhondo wokuhamba, futhi ibhili iyabuka lapho ushaya ipedali yokuhamba. Izinga lezinkinga libonisa ngokujwayelekile ukuthi kuzwa njengoba kuzwa lapho amafiltela ashiywe noma amainjektho ayashiywa. Ngokuba kunezinkinga eziningi ezinokubangela izinkinga eziphindiwe, ukuzwa kahle kubaluleka kakhulu. Abamekhaniki kufanele bahlale baxhuma imininingwane yezinsuku ngokulinganisa loo isensor isibonisa ngokulinganisa nokuthi iphinda kubonakala ngokwesayensi yezinkulungwane zokuxhuma. Kufanele bahlale babone amakhodi okuchaza izinkinga njenge-P0190 kuya kwe-P0193. Ukuzwa kahle ukuthi isensor isivutha kabefore ukubuyisela kuyabangela ukuthi kubhishwe imali eminye, kubhekise abatekinisi ukubuyisela izinto ezingafanele, futhi kubhekise ukuthi ukungafanele kwenza kubhekise kahle.

Imibuzo Eshicilekile: Ukuzwisisa Imisebenzi Yemithambo Yokuqinisa Iphresha Yemafutha

Umgomo wokuphakeme kwe-mithambo yokuqinisa iphresha yemafutha uyiphi?

Umgomo wokuphakeme kwe-mithambo yokuqinisa iphresha yemafutha kukuzwa nokuguqula iphresha yemafutha yendlela yokuqinisa ku-sinyal eletirikhayo eshiywa ku-Engine Control Unit (ECU) yomoto ukuze kube lula ukuthumela imafutha nokufinyelela kokuhlanya.

Kungani ukubeka kwemithambo yokuqinisa iphresha yemafutha kubalulekile?

Ukubeka okuhle kwenqubo yemafutha kusiza umithambo ukuzwa izinguquko zokuphakeme kohlanga, kusiza i-ECU ukwenza izilungiselelo ezimbi nezihle ukuze kube lula ukuthenga imafutha. Ukubeka okungahle kusiza i-ECU ukuphinda kusizwe futhi kusiza ukuthenga imafutha ngokungafanele.

Imithambo yokuqinisa iphresha yemafutha iyiphindaphinde yini emoto yokuqinisa imafutha ngokushesha (GDI)?

Amazwi amahle kwe-mithambo yokuqinisa iphresha yemafutha ayisisekelo sokusebenza kwe-GDI ngoba zisebenza kumathuba amahle amancane yokuphakeme. Amazwi angafanele kusiza ukuhlanya okungafanele, ukuvutha kakhulu kwe-hydrocarbons engaqinisiwe, nokuthenga imafutha ngokungafanele.

Izinkcazo zokuphela kwe-mithambo yokuqinisa iphresha yemafutha ziyiphi?

Isensọ ya ukuphakanyiswa kwezilwane zokufaka isilwane esingavumelekile kusukela kubonakala ukuthi isilwane sifakwa ngokuphelele, izinkinga zokuvula isilwane esikhaphazekile, umnyama wokushisa okuphakanyiswa, nokuzimisela kwemotora. Kuyamangaliswa ukuthi kubonakale kahle lezi ziqukithelo ukuze kubonakale ukuthi isensọ iyadlula.