A Octane yawan fetur

Fetur - flammable ruwa da ciwon wani launi, ko da kadan yellowish tinge (idan ba musamman Additives). Domin inganta aiki Properties na da mota da man fetur a ciki konewa injuna, masana'antun na kokarin kara da Octane yawan fetur. Don yin wannan, ƙara m gyara a shi. Idan konewa halayyar audible sauti daga karfe samar da harin kalaman sakamakon daga mahara gani na ta Silinda bango, da mota ya dace an rage, haka ma, shi ne kara lalacewa.

A wannan yanayin da muke cewa talakawa quality man fetur, a matsayin Octane lambar ne low. Fasa engine man fetur da kwanciyar hankali, Ina nufin ikon tsayayya kai-ƙonewa saboda matsawa a cikin cylinders da engine aiki characterizes wannan adadi. Numerically shi ne ƙarar sulusi da murabba'i na isooctane (sauran sunan: 2,2,4-trimethylpentane) a cikin wani biyu-bangaren cakuda dauke da ma n-heptane. Irin wannan cakuda game da ta antiknock karkashin tuta gwajin yanayin samar da wani sakamako m diddigin man fetur.

Isooctane - branched sarkar cikakken hydrocarbon C8H18. Shi ne da godiya ga da kaddarorin, yana da wuya a oxidize ko da a babban matsawa rabo, don haka shi ne conventionally yarda buga juriya na 100 raka'a. N-heptane a cikin mota behaves daban: ko da a low matsawa rabo ne tare da wani tsari na konewa fasa sakamako, duk da haka, wannan kudi da aka dauka a matsayin 0 raka'a ga shi. A waɗannan lokuta inda da man fetur Octane lambar sama da 100, don kimantawa na da inganci sikelin amfani matukar garwayayye daga gare ta, a cikinsa babban bangaren - isooctane - tetraethyl kara daban-daban dosages.

Saboda haka, ana iya bayar da hujjar cewa wannan adadi ne da ya fi muhimmanci alama na mota man fetur. Ya nuna yadda fetur ne resistant zuwa fasa, cewa shi ne mai bazuwar wuta a cikin engine cylinders. man fetur fashewa Yiwuwar ciki konewa engine zai zama mafi shafa idan wannan kudi ne high. Idan da Octane yawan na fetur yayi dace raka'a 95, shi detonates cakuda kunsha 95% 2,2,4-trimethylpentane da 5% al'ada heptane. Bayan firamare magani ga mai samfurin kira naphtha, wannan halayyar darajar da wuya ya wuce 70 raka'a. Saboda haka, don inganta ingancin low sa fetur amfani ba kawai tabi (hadawa da high-Octane kayayyakin), amma kuma antidetonators gudanar a wani adadin zuwa 0.3%.

Fuel ingancin dogara sun fi mayar a kan abun da ke ciki na ma'adanai, daga abin da aka samu ta hanyar fractionation ko barasan, - man fetur. Yana da muhimmanci a irin wannan abubuwan a matsayin danko, da fractional abun da ke ciki, gaban sulfur mahadi da paraffins, da kuma abun ciki na ruwa da kuma salts narkar da a cikinta. Duk da haka, wadannan dalilai yiwuwa tasiri cikin aiki halaye da kuma zabi na fasaha. A ingancin fetur, Ina nufin ta Octane yawan darajar, da kayyade hydrocarbon abun da ke ciki na mai, sa'an nan da hanya domin ta aiki, wanda kuma ya dogara da nawa fetur ne isooctane, n-heptane, aromatic mahadi, da sauransu.

Inganta antiknock kaddarorin fetur cikinta aromatics. A babban abun ciki na benzene, da farko rinjayar da jihar na yanayi a matsayin tushen benzopyrene (a carcinogen). Dagagge matakan high tafasar aromatics inganta toka samuwar a cikin konewa jam'iyya da kuma engine bawuloli. Duk wannan ya rage yi Manuniya kamar engine yi, yadda ya dace, da muhalli da tattalin arziki da al'amurran da ta aiki. Toka kafa a konewa jam'iyya Yanã shigar da mota mai zabi engine man fetur don haka da cewa Octane yawan da fetur da aka high. In ba haka ba, ikon da aka da yawa rage ko da engine ne a guje tare da wani harin.