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PowerPoint ® Presentation Chapter 1 Internal Combustion Engines Engine Classification Small Engine Development Energy Conservation Principles Small Engine.

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Presentation on theme: "PowerPoint ® Presentation Chapter 1 Internal Combustion Engines Engine Classification Small Engine Development Energy Conservation Principles Small Engine."— Presentation transcript:

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2 PowerPoint ® Presentation Chapter 1 Internal Combustion Engines Engine Classification Small Engine Development Energy Conservation Principles Small Engine History

3 Chapter 1 Internal Combustion Engines Competencies Explain the classification small engine and discuss the main small engine types. Explain the classification small engine and discuss the main small engine types. Describe types of cylinder design and cooling systems. Describe types of cylinder design and cooling systems. Explain small engine development history. Explain small engine development history. Explain energy conversion principles that apply to small engines. Explain energy conversion principles that apply to small engines. Explain heat transfer. Explain heat transfer. List the common energy conversion calculations. List the common energy conversion calculations. Explain the chemistry of fuel combustion in small engines. Explain the chemistry of fuel combustion in small engines. Describe the small engine industry. Describe the small engine industry.

4 Chapter 1 Internal Combustion Engines Small Engines internal combustion engine internal combustion engine converts heat energy from the combustion of fuel into mechanical energy converts heat energy from the combustion of fuel into mechanical energy rated up to 25 horsepower (HP) rated up to 25 horsepower (HP) spark ignition or compression spark ignition or compression four-stroke or two-stroke cycle four-stroke or two-stroke cycle

5 Chapter 1 Internal Combustion Engines Engine Design one, two, or four cylinders one, two, or four cylinders cylinder orientation cylinder orientation vertical, horizontal, or slanted vertical, horizontal, or slanted cylinder configuration cylinder configuration V, horizontally-opposed, or in-line V, horizontally-opposed, or in-line air-cooled or liquid-cooled air-cooled or liquid-cooled

6 Chapter 1 Internal Combustion Engines Development History gunpowder engine gunpowder engine steam engine steam engine coal gas coal gas internal combustion internal combustion gasoline power gasoline power diesel engine diesel engine

7 Chapter 1 Internal Combustion Engines Energy Conversion Principles small engines convert potential energy into kinetic energy small engines convert potential energy into kinetic energy all internal combustion engines operate utilizing basic principles of heat, force, pressure, torque, work, power, and chemistry all internal combustion engines operate utilizing basic principles of heat, force, pressure, torque, work, power, and chemistry

8 Chapter 1 Internal Combustion Engines Heat Transfer conduction is heat transfer from atom to atom via molecules in direct contact conduction is heat transfer from atom to atom via molecules in direct contact convection is heat transfer by currents in a fluid convection is heat transfer by currents in a fluid radiation is heat transfer that occurs as radiant energy without a material carrier radiation is heat transfer that occurs as radiant energy without a material carrier

9 Chapter 1 Internal Combustion Engines Energy Conversion Calculations temperature is the intensity of heat temperature is the intensity of heat °C = (°F – 32) ÷ 1.8 °C = (°F – 32) ÷ 1.8 °F = (1.8 × °C) + 32 °F = (1.8 × °C) + 32 pressure is a force acting on a unit of area pressure is a force acting on a unit of area pressure = force ÷ area pressure = force ÷ area

10 Chapter 1 Internal Combustion Engines Energy Conversion Calculations torque is a force acting on a perpendicular radial distance from a point of rotation torque is a force acting on a perpendicular radial distance from a point of rotation torque = force × radius torque = force × radius work is the movement of an object by a constant force work is the movement of an object by a constant force work = force × distance work = force × distance

11 Chapter 1 Internal Combustion Engines Energy Conversion Calculations power is the rate at which work is done power is the rate at which work is done power = work ÷ time power = work ÷ time horsepower (HP) is a measure of power equal to 76 watts or 33,000 lb-ft per min horsepower (HP) is a measure of power equal to 76 watts or 33,000 lb-ft per min HP = work ÷ (time × 33,000) HP = work ÷ (time × 33,000)

12 Chapter 1 Internal Combustion Engines Combustion Chemistry combining of hydrocarbon fuel with oxygen combining of hydrocarbon fuel with oxygen a chemical reaction between the hydrocarbon molecule and atmospheric oxygen combining at ignition temperature causes an exchange of elements that releases heat energy a chemical reaction between the hydrocarbon molecule and atmospheric oxygen combining at ignition temperature causes an exchange of elements that releases heat energy

13 Chapter 1 Internal Combustion Engines Small Engine Industry outdoor power equipment manufacturers outdoor power equipment manufacturers service technicians service technicians Briggs & Stratton MST program Briggs & Stratton MST program

14 Chapter 1 Internal Combustion Engines Chapter 1 Review In a typical small engine, approximately what percent of the energy released is converted into useful work? Approximately 30% of the energy is converted into useful work. Approximately 30% of the energy is converted into useful work. What is horsepower? Horsepower is a unit of power equal to 33,000 lb-ft per min. Horsepower is a unit of power equal to 33,000 lb-ft per min.


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