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Volume 56, Issue 9
Displaying 1-7 of 7 articles from this issue
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[in Japanese]1977 Volume 56 Issue 9 Pages 709-710
Published: September 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSDownload PDF (403K) -
Yong Kil Kim1977 Volume 56 Issue 9 Pages 711-720
Published: September 20, 1977
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSThis paper presents technical reviews of automobile engines fueled with methanol and gasoline-methanol blends on the characteristics of combustion, output, fuel economy, driveability and exhaust emissions. Here, effects of such factors as follows are discussed and summarezed: mixture ratio, compression ratio, heat of evaporation, fuel supply system, stratified charge system, gasoline-methanol blends etc.
As for the results, we can come to the conclusions that methanol fueled engine are available for better performances and less exhaust emissions improved especially by modifying fuel supply system and by increasing compression ratio than thoes of gasoline operation, and that there are few problems in gasoline-methanol blends without phase separation. Finally we took up some problems concerning with cold starting and unburned hydrocarbon especially as aldehyde.View full abstractDownload PDF (1331K) -
Shoichi Furuhama1977 Volume 56 Issue 9 Pages 721-731
Published: September 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSFor the energy source of automobiles, more than 30 years ahead, fuel cell or hydrogen will be of greatest promise. In respect of transportability, liquid hydrogen is more advantageous. For good thermal efficiency, low NOx emission and suppression of abnormal combustion, the maximum output power of hydrogen fueled engine should be increased as much as possible and then, in the most past of practical operation, the engine should be operated in lean mixture. For this purpose, there are two methods; one is cooling intake air by liquid hydrogen, the other is hydrogen fuel injection during compression stroke, which also has to use liquid hydrogen to minimize the compression work.
And this paper also describes in detail the characteristics of hydrogen gas, liquid hydrogen and metal hydride for an automobile fuel, and a phenomenon and some control methods of backfire.View full abstractDownload PDF (2116K) -
Chikai Kimura, Koichi Murai1977 Volume 56 Issue 9 Pages 732-742
Published: September 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSRecently, there has been increasing interest in oxygen-containing fuel to alleviate possible gasoline shortage and also to decrease enviromental pollution caused by automotive engine.
In this paper, general survey has been presented regarding oxygen-containing fuels such as methanol, methyl tertiary butyl ether and emulsion fuels, and their physicalchemical properties, preparations and fuel characteristics have been elucidated.View full abstractDownload PDF (1386K) -
Suehiko Yoshitomi1977 Volume 56 Issue 9 Pages 743-750
Published: September 20, 1977
Released on J-STAGE: February 23, 2011
JOURNAL FREE ACCESSThere are three fields in studies on octane number of gasoline, i. e.(1) the technology to gain a fuel octane number desired, (2) the relation between octane number and the structure of hydrocarbon, or (3) the composition of exhaust gas. This paper describes a status of the studies on octane number.View full abstractDownload PDF (1000K) -
Tatsuo Miyadera, Misao Kawai1977 Volume 56 Issue 9 Pages 751-758
Published: September 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSGas phase reduction of NO with NH3 has been investigated by flow method. The reduction temperature in NO-NH3-O2-H2 system is lower than in NO-NH3-O2 system. Comparison of the experimental results with numerical calculation on H2-O2 system, we deduced as follows-- the active reactions of H2-O2 system increase H, O and OH radicals, then those radicals accelerate the formation of NH2 from NH3, and this acceleration cause the depression of reaction temperature.
We have also investigated the effects of O2 concentration, H2O and H2O2. The concentration of O2 had an effect on the reduction of NO, but on numerical calculation it had little effect on the formation of H, O and OH radicals. At high temperatures, H2O affected both on the reduction of NO and on the formation of those radicals. H2O2 had a large effect on the formation of the radicals, but it had no effect on the NO reduction.View full abstractDownload PDF (795K) -
Makoto Kiyomiya, Misao Kawai1977 Volume 56 Issue 9 Pages 759-767
Published: September 20, 1977
Released on J-STAGE: June 28, 2010
JOURNAL FREE ACCESSCalcined ocher was found to be active in the reduction of NO with NH3. The ocher calcined at 400°C showed the most high activity; the degree of NO conversion was 70% under the conditions of NO 450ppm, NH3 600ppm, O2 4%, SO2 240ppm, H2O 10%, N2 balance, SV 16, 000hr-1 and reaction temperature 350°C . The ocher was mainly consisted of hematite (α-Fe2O3), when it was calcined above 400°C . Hematite crystallization proceeded with increasing the calcination temperature and magnetite was partially formed between 700 and 800°C .
An increase in the calcination temperature led to a decrease in the specific surface area and pore volume of the catalyst, which decreased the activity for the reaction.
It was found that the ocher treated with a solution of sulfuric acid or promoted with V2O5 or Cr2O3 was enough active in the reaction for practical use .
A sharp increase in the activity of the ocher when it was previously to the reaction treated with a vapour of sulfuric acid was due to the ferrous and ferric sulfate formed on the surface of the catalyst. However, the activity decreased considerably if the ocher contained more than 30-40wt% of SO42-.View full abstractDownload PDF (913K)
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