Cylinder conditions at the start of compression in an SI engine operating at WOT on an air-standard Otto cycle are 60C and 98 kPa. The engine has a compression ratio of 9.5:1 and uses gasoline with AF = 15.5. Combustion efficiency is 96%, and it can be assumed that there is no exhaust residual. Calculate: %3D (a) Temperature at all states in the cycle. [0C] (b) Pressure at all states in the cycle. [kpa] (c) Specific work done during power stroke. [kJ/kg] (d) Heat added during combustion. kJ/kg] (e) Net specific work done. [kJ/kg] (f) Indicated thermal efficiency. [%)

Cylinder conditions at the start of compression in an SI engine operating at WOT on an air-standard Otto cycle are 60C and 98 kPa. The engine has a compression ratio of 9.5:1 and uses gasoline with AF = 15.5. Combustion efficiency is 96%, and it can be assumed that there is no exhaust residual. Calculate: %3D (a) Temperature at all states in the cycle. [0C] (b) Pressure at all states in the cycle. [kpa] (c) Specific work done during power stroke. [kJ/kg] (d) Heat added during combustion. kJ/kg] (e) Net specific work done. [kJ/kg] (f) Indicated thermal efficiency. [%)

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Cylinder conditions at the start of compression in an SI engine operating at WOT
on an air-standard Otto cycle are 60C and 98 kPa. The engine has a compression
ratio of 9.5:1 and uses gasoline with AF 15.5. Combustion efficiency is 96%, and
it can be assumed that there is no exhaust residual. Calculate:
(a) Temperature at all states in the cycle. [0C]
(b) Pressure at all states in the cycle. [kpa]
(c) Specific work done during power stroke. [kJ/kg]
(d) Heat added during combustion. [kJ/kg]
(e) Net specific work done. [kJ/kg]
(f) Indicated thermal efficiency. [%]
2

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