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The Effect of Methanol-Gasoline Mixing Ratio on Performance of Internal Combustion Engines
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Abstract
Engine performance has been investigated of currently gasoline powered passenger car engines converted to methanol and gasoline mixtures. A 4 cycle, 4 cylinder, 1.6 liter displacement engine for a conventional passenger car was tested varying the fueling condition.
The mixing ratio of methanol to gasoline was changed from zero percent to one hundred percent, discreetly.
Evaluation of engine performance was made to find the optimum air-fuel ratio and spark timing in each mixed fuel condition. It has been clarified that the stoichiometric air-fuel ratio in the mixed fuel can be determined by the mixing ratio P, as an expression of
The MBT(minimum spark advance for the best torque) characteristics for each mixed fuel codition show that the large retardation of spark timing will be required for the higher mixture ratio fuels. Changes in characteristics of fuel supply and air-fuel ratio sensing devices were investigated experimentally. Some solut ions for the problems expected in the flexible fuel systems will also be discussed.
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Yamauchi, T. and Sasayama, T., "The Effect of Methanol-Gasoline Mixing Ratio on Performance of Internal Combustion Engines," SAE Technical Paper 900584, 1990, https://doi.org/10.4271/900584.Also In
References
- Naegeil David W. “Combustion-Associated Wear in Alcohol-Fueled Spark Ignition Engines” SAE Paper 891641
- Naman T.M. Striegler B. C. “Engine and Field Test Evaluation of Methanol as an Automotive Fuel” SAE Paper 841703
- SAE Recent Advances in Electric Vehicle Technology SP-793 AUG 7-10 1989
- SAE Gaseous Fuels SP-798 Sep 25-28 1989
- Ernst R.J. Pefley R.K. Wiens F.J. “Methanol Engine Durability” SAE Paper 831704