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All Journal Semesta Teknika JMPM (Jurnal Material dan Proses Manufaktur) Syntax Literate: Jurnal Ilmiah Indonesia Martabe : Jurnal Pengabdian Kepada Masyarakat PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Journal of Engineering and Applied Technology Prosiding Seminar Nasional Program Pengabdian Masyarakat
Wahyudi, Wahyudi
Universitas Muhammadiyah Yogyakarta
Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Other

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Journal : Semesta Teknika

 1 
Performance of a 160 cc Four-Stroke Engine Using Non-Programmable Aftermarket CDI and Aftermarket Ignition Coil When Operating With Three Types of Gasoline Nurcahyadi, Teddy; Wahyudi, Wahyudi; Ruswanto, Dwi Isnaini; Ramadhani, Fithrio Manggala; Sidiq, Burhannudin; Handoko, Wahyu Tri
Semesta Teknika Vol 20, No 2 (2017): NOVEMBER 2017
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Ignition timing and output voltage must be re-tuned when the engine used different types of fuel.  This research aimed to investigate the effectiveness of CDI and ignition coil upgrade, both separately and combined, when various types of fuel was used by the engine.  This research was done on a 160 cc four-stroke engine of a Honda motorcycle with compression ratio 9:1.  The types of fuel used by the engine in this research was RON 88, RON 90, and RON 95 gasoline fuels. The engine’s torque was measured on an inertial type motorcycle chassis dynamometer.  The fuel consumption data was obtained by on road test, the value of the data was calculated by dividing the distance being traveled with the volume of fuel being consumed. The result of this research showed that when RON 88 gasoline was used, the influence of aftermarket CDI and aftermarket ignition coil gave almost comparable impacts to the increase of torque.  The combination of aftermarket CDI and aftermarket ignition coil was found to influence the largest torque increase percentage of 5.3% when RON 90 gasoline was used.  When RON 95 gasoline was used, the aftermarket ignition coil influenced the largest torque increase percentage of 4.3% at lower engine speed and 7.4% at higher engine speed.  The aftermarket CDI and aftermarket ignition coil, whether used separately or combined, always gave worse impact to fuel consumption when RON 88 and RON 90 gasoline was used. The opposite is true when RON 95 was used.
PENGARUH KOMPOSISI BIODISEL JAGUNG TERHADAP SIFAT-SIFAT CAMPURAN BIODISEL JATROPHA-JAGUNG Wahyudi, Wahyudi; Sasuta, Andre; Nadjib, Muhammad
Semesta Teknika Vol 22, No 2 (2019): NOVEMBER 2019
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.222249

Abstract

Biodisel merupakan bahan bakar alternatif untuk mesin disel yang biasanya terbuat dari minyak nabati. Minyak jatropha dan minyak jagung merupakan bahan baku biodisel yang potensial. Namun biodisel dari bahan baku minyak jatropha memiliki kelemahan, diantaranya adalah viskositas yang relatif tinggi dan nilai kalor yang relatif rendah. Salah satu upaya perbaikannya adalah pencampuran dengan minyak jagung. Penelitian ini bertujuan untuk mengetahui pengaruh dari variasi komposisi campuran terhadap karakteristik biodisel. Kedua jenis bahan baku diproses menjadi biodisel melalui reaksi transesterifikasi. Selanjutnya dilakukan pencampuran antara biodisel jatropha dan biodiesel jagung. Campuran dibuat dalam sembilan variasi komposisi. Setiap komposisi campuran diaduk dan dipanaskan pada suhu 90 °C selama 60 menit. Hasil penelitian menunjukkan bahwa campuran biodisel jatropha dan jagung memiliki viskositas yang lebih rendah daripada biodisel jatropha murni. Densitas dan titik nyala campuran biodisel tersebut juga mengalami penurunan. Hasil lainnya adalah nilai kalor biodiesel campuran lebih tinggi daripada nilai kalor biodiesel jatropha murni. Biodiesel is an alternative fuel for diesel engines that are usually made from vegetable oil. Jatropha and corn oil are potential biodiesel feedstocks. However, biodiesel from jatropha oil has disadvantages, including high viscosity and relatively low heating value. An effort to improve its properties is mixing it with corn oil. The purpose of this study was to determine the effect of the composition of the mixture on the biodiesel properties. Both raw materials were processed into biodiesel through transesterification reactions. The next step is mixing jatropha and corn biodiesel. There were nine variations of the biodiesel mixture. Each mixture was stirred and heated at 90 °C for 60 minutes. The results showed that the mixture of jatropha and corn biodiesel had lower viscosity than pure jatropha biodiesel. Density and flash point of the biodiesel mixture also decreased. The heating value of mixed biodiesel is higher than its of pure jatropha biodiesel.
Penelitian Nilai Kalor Biomassa : Perbandingan Antara Hasil Pengujian Dengan Hasil Perhitungan Wahyudi Wahyudi
Semesta Teknika Vol 9, No 2 (2006): NOVEMBER 2006
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v9i2.875

Abstract

Indonesia memiliki berbagai jenis bahan bakar biomassa yang banyak seperti limbah pertanian, limbah peternakan dan lainnya. Walaupun banyak digunakan oleh masyarakat pedesaan sebagai bahan bakar, namun pemanfaatannya belum optimal, bahan bakar limbah pertanian masih berkisar pada kayu dan sekam padi, sedangkan ampas tebu, daun kering dan limbah peternakan belum banyak digunakan. Banyakya jenis biomassa yang belum dimanfaatkan secara optimal, khususnya di Indonesia, mengharuskan adanya penelitian-penelitian yang ditujukan untuk pemanfaatan biomassa sebagai bahan bakar. Pada penelitian ini akan dilakukan pengujian nilai kalor biomassa meliputi limbah pertanian dan limbah peternakan. Tujuan penelitian ini adalah untuk mengetahui nilai kalor biomassa yang diuji dan membandingkannya dengan hasil perhitungan menggunakan korelasi-korelasi yang ada. Penelitian diawali dengan melakukan analisa ultimat dan analisa proksimat masing-masing bahan untuk mengetahui komposisi dasar bahan. Data tersebut digunakan untuk memperkirakan nilai kalor bahan bakar berdasar korelasi-korelasi yang ada. Pengujian menggunakan kalorimeter bomb memberikan data kenaikan suhu yang digunakan untuk menghitung nilai kalor. Nilai kalor hasil pengujian dibandingkan dengan nilai kalor yang dihitung dari korelasi, sehingga dapat diketahui korelasi yang paling sesuai untuk biomassa yang diuji.   Hasil pengujian menunjukkan nilai kalor biomassa yang diuji adalah 10,2 MJ/kg sampai dengan 24,7 MJ/kg. Korelasi yang memberikan nilai kalor mendekati nilai kalor hasil pengujian adalah Korelasi Tillman. Korelasi yang paling sesuai untuk biomassa yang diuji adalah HHV = 1.3941.C-18.3638.H+1.4682.O+16.7184.N-95.753.S+0.5184.A
Performance of a 160 cc Four-Stroke Engine Using Non-Programmable Aftermarket CDI and Aftermarket Ignition Coil When Operating With Three Types of Gasoline Teddy Nurcahyadi; Wahyudi Wahyudi; Dwi Isnaini Ruswanto; Fithrio Manggala Ramadhani; Burhannudin Sidiq; Wahyu Tri Handoko
Semesta Teknika Vol 20, No 2 (2017): NOVEMBER 2017
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v20i2.3347

Abstract

Ignition timing and output voltage must be re-tuned when the engine used different types of fuel.  This research aimed to investigate the effectiveness of CDI and ignition coil upgrade, both separately and combined, when various types of fuel was used by the engine.  This research was done on a 160 cc four-stroke engine of a Honda motorcycle with compression ratio 9:1.  The types of fuel used by the engine in this research was RON 88, RON 90, and RON 95 gasoline fuels. The engine’s torque was measured on an inertial type motorcycle chassis dynamometer.  The fuel consumption data was obtained by on road test, the value of the data was calculated by dividing the distance being traveled with the volume of fuel being consumed. The result of this research showed that when RON 88 gasoline was used, the influence of aftermarket CDI and aftermarket ignition coil gave almost comparable impacts to the increase of torque.  The combination of aftermarket CDI and aftermarket ignition coil was found to influence the largest torque increase percentage of 5.3% when RON 90 gasoline was used.  When RON 95 gasoline was used, the aftermarket ignition coil influenced the largest torque increase percentage of 4.3% at lower engine speed and 7.4% at higher engine speed.  The aftermarket CDI and aftermarket ignition coil, whether used separately or combined, always gave worse impact to fuel consumption when RON 88 and RON 90 gasoline was used. The opposite is true when RON 95 was used.
Pengaruh Komposisi Biodisel Jagung Terhadap Sifat-Sifat Campuran Biodisel Jatropha-Jagung Wahyudi Wahyudi; Andre Sasuta; Muhammad Nadjib
Semesta Teknika Vol 22, No 2 (2019): NOVEMBER 2019
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.222249

Abstract

Biodisel merupakan bahan bakar alternatif untuk mesin disel yang biasanya terbuat dari minyak nabati. Minyak jatropha dan minyak jagung merupakan bahan baku biodisel yang potensial. Namun biodisel dari bahan baku minyak jatropha memiliki kelemahan, diantaranya adalah viskositas yang relatif tinggi dan nilai kalor yang relatif rendah. Salah satu upaya perbaikannya adalah pencampuran dengan minyak jagung. Penelitian ini bertujuan untuk mengetahui pengaruh dari variasi komposisi campuran terhadap karakteristik biodisel. Kedua jenis bahan baku diproses menjadi biodisel melalui reaksi transesterifikasi. Selanjutnya dilakukan pencampuran antara biodisel jatropha dan biodiesel jagung. Campuran dibuat dalam sembilan variasi komposisi. Setiap komposisi campuran diaduk dan dipanaskan pada suhu 90 °C selama 60 menit. Hasil penelitian menunjukkan bahwa campuran biodisel jatropha dan jagung memiliki viskositas yang lebih rendah daripada biodisel jatropha murni. Densitas dan titik nyala campuran biodisel tersebut juga mengalami penurunan. Hasil lainnya adalah nilai kalor biodiesel campuran lebih tinggi daripada nilai kalor biodiesel jatropha murni. Biodiesel is an alternative fuel for diesel engines that are usually made from vegetable oil. Jatropha and corn oil are potential biodiesel feedstocks. However, biodiesel from jatropha oil has disadvantages, including high viscosity and relatively low heating value. An effort to improve its properties is mixing it with corn oil. The purpose of this study was to determine the effect of the composition of the mixture on the biodiesel properties. Both raw materials were processed into biodiesel through transesterification reactions. The next step is mixing jatropha and corn biodiesel. There were nine variations of the biodiesel mixture. Each mixture was stirred and heated at 90 °C for 60 minutes. The results showed that the mixture of jatropha and corn biodiesel had lower viscosity than pure jatropha biodiesel. Density and flash point of the biodiesel mixture also decreased. The heating value of mixed biodiesel is higher than its of pure jatropha biodiesel.
Co-Authors Adhianty Nurjanah Adi Parmono Aji, Hanung Yudistira Ali Minanto Andre Sasuta Aris Widyo Nugroho Azhim Asyratul Azmi Azmi, Azhim Asyratul Bambang Riyanta Burhannudin Sidiq Caroko, Novi Dwi Isnaini Ruswanto Eni Budiyati Fahmi, M. Iqbal Nur Fithrio Manggala Ramadhani Handoko, Wahyu Tri Hanif Budi Sampurna Hanung Yudistira Aji Haris Suhatno Haryo Wibowo Kunnu Purwanto M. Iqbal Nur Fahmi Muhammad Nadjib Muhammad Nadjib Nadjib, Muhammad Novi Caroko Nurcahyadi, Teddy Ramadhani, Fithrio Manggala Riski Apriliani Riyanta, Bambang Ruswanto, Dwi Isnaini Sarip Sarip Sarip, Sarip Sasuta, Andre Sembiring, Suzad Miko Setyonugroho, Winny Sidiq, Burhannudin Sudarja Sudarja, Sudarja Suhatno, Haris Suzad Miko Sembiring Thoharudin Thoharudin Thoharudin, Thoharudin Totok Suwanda Wahyu Tri Handoko Wardana, Linda Kusumastuti