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Math. Comput. Appl. 2007, 12(3), 161-171; doi:10.3390/mca12030161

Mathematical Modeling of a SI Engine Cycle with Actual Air-Fuel Cycle Analyses

1
Department of Mechanical Education, Technical Education Faculty, Karabuk University, Karabuk, Turkey
2
Department of Automotive, Vocational College, Karabuk University, Karabuk, Turkey
*
Author to whom correspondence should be addressed.
Published: 1 December 2007
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Abstract

The performance of an engine whose basic design parameters are known can be predicted with the assistance of simulation programs into the less time, cost and near value of actual. However, inadequate areas of the current model can guide future research because the effects of design variables on engine performance can be determined before. In this study, thermodynamic cycle and performance analyses were simulated for various engine speeds (1800, 2400 ve 3600 1/min) and various excess air coefficients (EAC) (0.95-1.05) to crank shaft angle (CA) with 1 degree increment at full load and 8:1 constant compression ratio (CR) of a SI engine with four stroke, single cylinder and natural aspirated. Brake mean effective pressure, power, thermal efficiency, specific fuel consumption (sfc), etc engine performance parameters were calculated; the values of peak cylinder pressures and temperatures and positions of them were determined by the present program. Variations of these parameters with crank angle, engine speed and excess air coefficient were presented graphically. The calculated results show good agreement with literature. Simulation program is usable to set for varies load, compression ratios, and engine sizes.
Keywords: Spark Ignition (SI) engine; Air-fuel cycle; Excess Air Coefficient (EAC) Spark Ignition (SI) engine; Air-fuel cycle; Excess Air Coefficient (EAC)
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Sekmen, P.; Sekmen, Y. Mathematical Modeling of a SI Engine Cycle with Actual Air-Fuel Cycle Analyses. Math. Comput. Appl. 2007, 12, 161-171.

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Math. Comput. Appl. EISSN 2297-8747 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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