Task 1 A V-8 Spark ignition engine has a 10 cm diameter bore and 10 cm stroke. At the beginning of compression process air is at 95 KPa and 27 Degree Celsius. 750 KJ/Kg of heat was transferred to air during heat addition process. The compression ratio is 8. Consider the variation of specific heats with temperature. A. Describe with the aid of diagrams the operational sequence of four stroke spark ignition engines B. Explain the mechanical efficiency for ideal otto cycle of two and four stroke engines C. What is the difference between four and two stroke spark ignition engines?

Task 1 A V-8 Spark ignition engine has a 10 cm diameter bore and 10 cm stroke. At the beginning of compression process air is at 95 KPa and 27 Degree Celsius. 750 KJ/Kg of heat was transferred to air during heat addition process. The compression ratio is 8. Consider the variation of specific heats with temperature. A. Describe with the aid of diagrams the operational sequence of four stroke spark ignition engines B. Explain the mechanical efficiency for ideal otto cycle of two and four stroke engines C. What is the difference between four and two stroke spark ignition engines?

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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Concept explainers

IC engines

The term "engine" indicates a mechanical device/machine used to convert input energy to a specific mechanical output. The input energy may be in the form of chemical energy, thermal energy, or so on and mechanical output is in the form of mechanical energy (work done). Generally, the engines classify into two groups which are internal combustion type and external combustion type, and further, these two types can be classified into two types that are reciprocating and rotary engines.

Question

Task 1
A V-8 Spark ignition engine has a 10 cm diameter bore and 10 cm stroke. At the beginning of
compression process air is at 95 KPa and 27 Degree Celsius. 750 KJ/Kg of heat was transferred to air
during heat addition process. The compression ratio is 8. Consider the variation of specific heats with
temperature.
A. Describe with the aid of diagrams the operational sequence of four stroke spark ignition
engines
B. Explain the mechanical efficiency for ideal otto cycle of two and four stroke engines
C. What is the difference between four and two stroke spark ignition engines?
D. Explain the relationship between thermal efficiency (n) and compression ratio (r).
E. Why are high compression ratios not used in spark ignition engines?
F. Determine the net-work output per cylinder per cycle (KJ)
G. Determine the efficiency of the engine.
H. Determine the Mean Effective Pressure (KPa)
I. What is the Power Output of the engine running at 2000 rpm.

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