?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+PENGGUNAAN+PASIR+SILIKA+SEBELUM+DAN+SESUDAH%0D%0ADIAKTIVASI+FISIK+TERHADAP+PRESTASI+MESIN+DAN+EMISI+GAS%0D%0ABUANG+SEPEDA+MOTOR+BENSIN+4-LANGKAH&rft.creator=SANDY+DWI+HARDIN+%2C+1115021068&rft.subject=Teknik+mesin+dan+mesin&rft.description=Pertumbuhan+jumlah+angkutan+umum+masal+yang+begitu+pesat+menjadi%0D%0Asalah+satu+permasalahan+pertumbuhan+kendaraan+roda+dua+yang+tak+terkendali+di%0D%0ATanah+Air.+Kemudian+tingkat+pencemaran+udarapun+semakin+meningkat+akibat%0D%0Agas+buang+hasil+proses+pembakaran+bahan+bakar+dan+udara+pada+kendaraan+yang%0D%0Akurang+sempurna.+Sebagai+upaya+yang+dilakukan+untuk+menghemat+konsumsi%0D%0Abahan+bakar+minyak+dan+mereduksi+emisi+gas+buang+yaitu%2C+dengan+cara%0D%0Amemanfaatkan+pelet+pasir+silika+yang+digunakan+sebagai+adsorben+udara%0D%0Apembakaran%2C+karena+sifat+kandungan+utama+seperti+SiO2%2C+Fe2O3%2C+Al2O3%2C+TiO2%2C%0D%0ACaO%2C+MgO%2C+dan+K2O%2C+yang+terdapat+pada+pasir+silika+mampu+menyerap+uap+air%0D%0Ayang+ada+di+udara+ketika+berkontak+dengan+pellet+pasir+silika+tersebut.+Sehingga%0D%0Aproses+pembakaran+dalam+ruang+bakar+akan+lebih+sempurna+karena%2C+konsentrasi%0D%0Auap+air+pada+saat+masuk+kedalam+ruang+bakar+lebih+sedikit+dan+panas+awal+udara%0D%0Apembakaran+yang+dibutuhkan+semakin+meningkat.+Penelitian+ini+bertujuan+untuk%0D%0Amelihat+pengaruh+sebelum+dan+sesudah+diaktivasi+fisik+pelet+pasir+silika+terhadap%0D%0Aprestasi+mesin+dan+emisi+gas+buang+pada+sepeda+motor+bensin+4-langkah.%0D%0APenelitian+ini+dilakukan+dengan+beberapa+parameter+pengujian+diantaranya%0D%0Aadalah+pengujian+daya+rekat+pelet%2C+pengujian+konsumsi+bahan+bakar%2C+akselerasi%2C%0D%0Adan+emisi+gas+buang.+Pengujian+konsumsi+bahan+bakar+dilakukan+dengan+dua%0D%0Avariasi+pengujian+yaitu+pengujian+stasioner+(pada+putaran+mesin+1500+rpm%2C+3000%0D%0Arpm%2C+dan+4500+rpm)+dan+road+test+(berjalan+menempuh+jarak+5+km+dengan%0D%0Akecepatan+rata-rata+60+km%2Fjam)%2C+kemudian+pengujian+akselerasi+(0-80+km%2Fjam+dan%0D%0A40-80+km%2Fjam)+serta+pengujian+emisi+gas+(pada+putaran+1500+rpm%2C+putaran+3500%0D%0Arpm%2C+dan+putaran+4500+rpm).+Pelet+pasir+silika+yang+digunakan+berdiameter+10+mm%0D%0Adan+tebal+3+mm+yang+dikemas+dengan+frame+berupa+kawat+strimin+menyerupai%0D%0Abentuk+filter+udara+pada+kendaraan+sepeda+motor+bensin+4-langkah+Honda+Supra+X%0D%0A125+cc+yang+digunakan+sebagai+mesin+uji+pada+penelitian+ini.%0D%0ADari+penelitian+yang+telah+dilakukan%2C+maka+diperoleh+daya+rekat+terbaik%0D%0Apelet+yaitu+dengan+perekat+tapioka+3%25+dengan+temperatur+aktivasi+150%C2%B0C+dan%0D%0A200%C2%B0C+dimana+pengurangan+massa+sebesar+0%2C01+gram.+Penggunaan+pasir+silika%0D%0Aternyata+mampu+menghemat+konsumsi+bahan+bakar+hingga+23%2C881%25+dengan%0D%0Aperekat+tapioka+3%25+dan+1%25+pada+pengujian+stationer+putaran+rendah+1500+rpm%0D%0Adan+sebesar+13%2C651%25+dengan+variasi+perekat+tapioka+2%25+dan+3%25+pada+pengujian%0D%0Aberjalan.+Kemudian+pellet+pasir+silika+dengan+perekat+tapioka+3%25+juga+mampu%0D%0Ameningkatkan+akselerasi+mesin+hingga+12%2C45%25+pada+0-80+km%2Fjam+dan+perekat%0D%0Atapioka+1%25+sebesar+16%2C27%25+pada+40-80+km%2Fjam+serta+dapat+mereduksi+emisi+gas%0D%0Abuang+CO+hingga+33%2C875%25%2C+HC+hingga+56%25.%0D%0AKata+Kunci%3A+pasir+silika%2C+pelet+pasir+silika%2C+filter+udara%2C+prestasi+mesin%2C+emisi+gas%0D%0Abuang%0D%0A%0D%0AABSTRACT%0D%0A%0D%0AThe+rapid+growth+of+mass+public+transportation+has+become+one+of+the%0D%0Auncontrollable+growth+problems+of+motorcycles+in+the+country.+Then+the+level+of%0D%0Aair+pollution+is+increasing+due+to+exhaust+gas+fuel+and+air+combustion+process+in%0D%0Athe+less+perfect+vehicle.+As+an+efforts+to+save+fuel+consumption+and+reduce+exhaust%0D%0Agas+emissions%2C+namely%2C+by+utilizing+pellets+silica+sand+that+is+used+as+adsorbent%0D%0Acombustion+air%2C+due+to+the+nature+of+the+main+content+such+as+SiO2%2C+C%2C+Al2O3%2C%0D%0ACaO%2C+dan+Na2O%2C+which+contained+in+silica+sand+is+able+to+absorb+water+vapor+in+the%0D%0Aair+when+its+contacted+to+that+silica+sand+pellets.+The+combustion+process+in+the%0D%0Acombustion+chamber+will+be+more+perfect+because%2C+the+concentration+of+water%0D%0Avapor+at+the+time+of+entry+into+the+combustion+chamber+is+less+and+the+initial+heat%0D%0Aof+the+required+combustion+air+is+increasing.+This+study+aims+to+examine+the+effect%0D%0Abefore+and+after+in+the+physical+activation+of+silica+sand+pellets+on+engine%0D%0Aperformance+and+exhaust+gas+emissions+on+4-steps+gasoline+motorcycle.%0D%0AThis+study+is+conducted+by+several+testing+parameters+such+as+testing+the+adhesion%0D%0Aof+pellets%2C+testing+fuel+consumption%2C+acceleration%2C+and+exhaust+gas+emissions.%0D%0ATesting+fuel+consumption+is+done+with+two+variations+of+testing+that+is+stationary%0D%0Atesting+(at+1500+rpm+engine+speed%2C+3000+rpm%2C+and+4500+rpm)+and+road+test+(runs+a%0D%0Adistance+of+5+km+with+an+average+speed+of+60+km+%2F+hour)%2C+then+acceleration+testing%0D%0A(0-80+Km+%2F+Hour+and+40-80+Km+%2F+Hour)+as+well+as+exhaust+gas+emissions+testing%0D%0A(at+1500+rpm+rotation%2C+3500+rpm+rotation%2C+and+4500+rpm+rotation).+Silica+sand%0D%0Apellets+that+are+used+have+10+mm+diameter+and+thickness+of+3+mm+which+are%0D%0Apacked+with+the+frame+in+the+form+of+wire+strimin+resemble+with+the+shape+of+the%0D%0Aair+filter+on+a+4-steps+gasoline+motorcycle+of+Honda+Supra+X+125+cc+is+used+as+the%0D%0Atest+machine+in+this+study.%0D%0AFrom+the+research+that+is+done%2C+then+it+is+obtained+the+best+adhesion+with+3%25%0D%0Aadhesive+tapioca+pellets+with+an+activation+temperature+of+150%C2%B0C+and+200%C2%B0C%2C%0D%0Awhere+a+mass+reduction+is+at+0.01+grams.+The+use+of+silica+sand+was+able+to+save%0D%0Afuel+consumption+up+to+23.881%25+at+low+speed+stationary+testing+of+1500+rpm+and%0D%0Aamounted+to+13.651%25+on+a+test+run.+Then+the+use+of+silica+sand+pellets+can+also%0D%0Aincrease+machine+acceleration+up+to+13.07%25+in+the+0-80+km+%2F+hour+and+16.27%25+in%0D%0Athe+40-80+km+%2F+hour+and+can+reduce+exhaust+gas+emissions+up+to+33.875%25+CO%2C+HC%0D%0Aup+to+56%25.%0D%0AKeywords%3A+silica+sand%2C+silica+sand+pellets%2C+air+filter%2C+machine+performance%2C%0D%0Aexhausts+gas+emissions.&rft.publisher=FAKULTAS+TEKNIK&rft.date=2018-02-08&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F30501%2F1%2FABSTRACT%2520%2528ABSTRAK%2529.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F30501%2F15%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F30501%2F16%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++SANDY+DWI+HARDIN+%2C+1115021068++(2018)+PENGARUH+PENGGUNAAN+PASIR+SILIKA+SEBELUM+DAN+SESUDAH+DIAKTIVASI+FISIK+TERHADAP+PRESTASI+MESIN+DAN+EMISI+GAS+BUANG+SEPEDA+MOTOR+BENSIN+4-LANGKAH.++FAKULTAS+TEKNIK%2C++UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F30501%2F