Answered: 1.Why have eight cylinders in an…

1.Why have eight cylinders in an engine? why not have one big cylinder of the same displacement of the eight cylinders instead

Automotive Technology: A Systems Approach (MindTap Course List)

6th Edition

ISBN:9781133612315

Author:Jack Erjavec, Rob Thompson

Publisher:Jack Erjavec, Rob Thompson

Chapter9: Automotive Engine Designs And Diagnosis

Section: Chapter Questions

Problem 1RQ

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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

1.Why have eight cylinders in an engine? why not have one big cylinder of the same displacement of the eight cylinders instead? 27. What causes white smoke in two stroke locomotive engines? 28. Why efficiency of gas turbines is lower compared to internal combustion engines?

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6. Why have eight cylinders in an engine? why not have one big cylinder of the same displacement of the eight cylinders instead? 7. What causes white smoke in two stroke locomotive engines? 8. Why efficiency of gas turbines is lower compared to internal combustion engines? 9. Why do we not use different technology to start both spark ignition /compression ignition engine? 10. Which has more efficiency: diesel engine or petrol engines?
What are the advantages and disadvantages of two stroke and four stroke engines?
Compare the advantages and disadvantages of two stroke and four stroke engines
1.) Explain the advantages and disadvantages of diesel and gasoline engines as compared to other sources of power.
. A company wants to purchase a diesel engine for an electric power generator. What would be the better choice, 2 stroke or 4 stroke diesel engine? Please furnish reasoning in support of your answer.
Explain giving arguments of a physical nature; the reason why when designing engines, a gap or space must be left between the pistons and the walls of the engine cylinders.
Describe in your own. (in full detail) words the operation of a petrol engine, and explain how it is estimated by the idealised Otto cycle. [Hint: you can make use of one or more diagrams.]
A four-cylinder gasoline engine has a cylinder diameter of 20 cm and a stroke of 40 cm. The cylinders run at a speed of 150 rpm. The engine is a four-stroke cycle with a mean effective pressure of 8 kg/cm². v. What is the indicated horsepower? vii. If the engine mechanical efficiency is 80%, what is the brake horsepower of the engine?
Part A. How much heat goes into this gas per cycle? Express your answer to two significant figures and include the appropriate units. Part C. How much heat is ejected by the gas per cycle? Express your answer to two significant figures and include the appropriate units. Part E.How much work does this engine do each cycle? Express your answer to two significant figures and include the appropriate units. Part F.What is the thermal efficiency of the engine? Express your answer as a percentage to two significant figures.
3. What are in-line engines ? It is possible to balance them completely
2.Explain the ‘direct and reverse crank’ method for determining unbalanced forces in radial engines.
30. A power producing equipment with a 4 cylinder, 4- stroke and operating in an air standard diesel cycle has a bore of 10cm and stroke of 12cm. Determine the engine displacement in each cycle. a. 7.5396Li b. 7.5399Li c. 7.5397Li d. 7.5398Li