04/01758 A new non-linear calculation method of isomerisation gasoline research octane number based on gas chromatographic data

2004 ◽  
Vol 45 (4) ◽  
pp. 247
Fuel ◽  
2004 ◽  
Vol 83 (4-5) ◽  
pp. 517-523 ◽  
Author(s):  
N. Nikolaou ◽  
C.E. Papadopoulos ◽  
I.A. Gaglias ◽  
K.G. Pitarakis

2016 ◽  
Vol 6 (2) ◽  
pp. 65
Author(s):  
Ridwan Arief Subekti

Makalah ini membahas tentang pengaruh laju aliran bahan bakar CNG (compressed natural gas) terhadap performa kendaraan roda empat jenis minibus. Pengaturan dan pengujian dilakukan untuk mencari setelan laju aliran CNG yang terbaik agar performa kendaraan optimal. Tahap pertama dari penelitian ini adalah pemasangan peralatan kit konverter tipe injeksi sequensial pada kendaraan. Selanjutnya dilakukan pengujian performa kendaraan menggunakan  dyno  test  atau  sasis  dyno.  Pada  awalnya,  bahan  bakar  yang  digunakan  adalah  Pertamax  RON (research  octane  number)  92  yang  kemudian  diganti  dengan  CNG.  Dari  pengujian  dua  bahan  bakar  tersebut diketahui bahwa terjadi penurunan daya dan torsi kendaraan bila menggunakan CNG. Tahap berikutnya adalah melakukan pengaturan laju aliran CNG dengan cara mengatur durasi penyemprotan injektor. Hasil uji yang ditampilkan dalam bentuk grafik putaran terhadap daya dan putaran terhadap torsi memperlihatkan bahwa performa kendaraan  berbahan  bakar  CNG  dengan  pengaturan  laju  aliran  gas  meningkat  sekitar  3%.  Sedangkan  bila penggunaan CNG dibandingkan dengan Pertamax RON 92, terjadi penurunan daya dan torsi pada kendaraan sebesar 12,4% dan 23,7%.Kata kunci : ratio laju udara, CNG, kit konverter, laju aliran gas, mesin bensin


2021 ◽  
Author(s):  
Ningchen Fu ◽  
Zicheng Lai ◽  
Yuping Zhang ◽  
Yan Ma

The octane number is one of the important indicators in crude oil processing, and it is related to the anti-knock performance of gasoline engines. The loss of octane number in...


2002 ◽  
Vol 125 (1) ◽  
pp. 344-350 ◽  
Author(s):  
S. G. Poulopoulos ◽  
C. J. Philippopoulos

In the present work, the effect of adding ethanol or methyl tertiary butyl ether (MTBE) to gasoline on the regulated and unregulated emissions from an internal combustion engine with a typical three-way catalyst was studied. The addition of ethanol to fuel (10% w/w) increased both the research octane number and the Reid vapor pressure of the fuel, whereas adding 11% w/w MTBE caused an increase only in the research octane number of the fuel. When the fuel contained MTBE, less hydrocarbons, carbon monoxide, and acetaldehyde were emitted in the tailpipe. The increased emissions of acetaldehyde and ethanol were the main disadvantages of using ethanol.


Author(s):  
Kimihiro Toh ◽  
Shunsuke Maeda ◽  
Takao Yoshikawa

In order to obtain the non-linear average stress-average strain relationships (σ-ε curves) of damaged structural members under both tensile and compressive loads, the systematical calculations are performed using the non-linear FE analysis (FEA) code, LS-DYNA, and the idealized σ-ε curves of damaged structural members are estimated from FEA results. In addition, by introducing the idealized σ-ε curves of damaged structural members to the simplified calculation program, which is developed by authors and based on the Smith’s method, the residual ultimate strength of damaged hull structures is calculated. The residual ultimate strength of damaged hull structures is also calculated utilizing FEA, the calculation results by the simplified calculation program are compared with the results obtained from FE analyses so as to examine the accuracy of simplified calculation method.


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