Lawn Mower Internal Combustion Engine
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| + | {{disassembly}} | ||
| + | {{drawings}} | ||
| + | {{CAD_Models}} | ||
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[[Image:lawnmower_mjd.JPG|right|thumb|300px|Lawn Mower with Internal Combustion Engine]] | [[Image:lawnmower_mjd.JPG|right|thumb|300px|Lawn Mower with Internal Combustion Engine]] | ||
=Description= | =Description= | ||
| − | The engine is designed to power a lawn mower blade in order to cut grass faster, easier, and more efficiently than man powered mowers and previous engine models. The engine in particular that was dissected and analyzed was a four-stroke lawn mower engine manufactured by Briggs and Stratton. | + | The engine is designed to power a lawn mower blade in order to cut grass faster, easier, and more efficiently than man powered mowers and previous engine models. The engine in particular that was dissected and analyzed was a four-stroke lawn mower engine manufactured by [http://www.briggsandstratton.com/display/router.asp?DocID=64103 ''Briggs and Stratton'']. |
== How It Works == | == How It Works == | ||
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This engine works on a four-stroke cycle. A manual crank starts the cycle while creating a vacuum to draw gas and air into the cylinder. Concurrently, an electrical current is produced to create a spark which would ignite the fuel-air mixture compressed in cylinder by the piston. This piston turns the camshaft through a linear-to-rotational energy conversion. The camshaft then turns the output of the motor, which is a blade, to cut the grass. | This engine works on a four-stroke cycle. A manual crank starts the cycle while creating a vacuum to draw gas and air into the cylinder. Concurrently, an electrical current is produced to create a spark which would ignite the fuel-air mixture compressed in cylinder by the piston. This piston turns the camshaft through a linear-to-rotational energy conversion. The camshaft then turns the output of the motor, which is a blade, to cut the grass. | ||
| − | + | [[Image:briggsengine_mjd.JPG|right|thumb|300px|Briggs and Stratton four-stroke engine]] | |
'''For a detailed bill of materials for the engine, refer to the following link:''' | '''For a detailed bill of materials for the engine, refer to the following link:''' | ||
===[[Dissected Parts to an Internal Combustion Engine]]=== | ===[[Dissected Parts to an Internal Combustion Engine]]=== | ||
| − | === | + | ===Parts Analyzed for Design Decisions and Critical Features=== |
<gallery> | <gallery> | ||
| − | |||
Image:flywheel_proe_mjd.JPG|<p style="text-align: center;">'''''[[Flywheel]]''''' | Image:flywheel_proe_mjd.JPG|<p style="text-align: center;">'''''[[Flywheel]]''''' | ||
| + | Image:crankshaft_proe_mjd.JPG|<p style="text-align: center;">'''''[[Crankshaft]]''''' | ||
Image:pistonrod_proe2_mjd.JPG|<p style="text-align: center;">'''''[[Piston/Rod Assembly]]''''' | Image:pistonrod_proe2_mjd.JPG|<p style="text-align: center;">'''''[[Piston/Rod Assembly]]''''' | ||
</gallery> | </gallery> | ||
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=Analysis of Engineering Specifications= | =Analysis of Engineering Specifications= | ||
| − | + | [[Image:front_mjd.JPG|right|thumb|300px|Front View]] | |
| − | + | [[Image:side_mjd.JPG|right|thumb|300px|Top View]] | |
| − | [[ | + | [[Image:iso_mjd.JPG|right|thumb|300px|Isometric View]] |
| + | ==Engineering Specifications Verified Quantitatively== | ||
<gallery> | <gallery> | ||
| − | Image: | + | Image:adams_mjd.JPG|<p style="text-align: center;">'''''[[Minimum Mass of Flywheel to Stabilize Angular Velocity]]''''' |
Image:ansys4_mjd.JPG|<p style="text-align: center;">'''''[[Expected Cycle Life of Crankshaft]]''''' | Image:ansys4_mjd.JPG|<p style="text-align: center;">'''''[[Expected Cycle Life of Crankshaft]]''''' | ||
Image:ansys8_mjd.JPG|<p style="text-align: center;">'''''[[Expected Cycle Life of Piston Rod]]''''' | Image:ansys8_mjd.JPG|<p style="text-align: center;">'''''[[Expected Cycle Life of Piston Rod]]''''' | ||
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<embed src="http://www.youtube.com/v/T8fM9TMMP4M" type="application/x-shockwave-flash" width="425" height="350"></embed> | <embed src="http://www.youtube.com/v/T8fM9TMMP4M" type="application/x-shockwave-flash" width="425" height="350"></embed> | ||
| − | [[media:ICE_simulation.avi|Right-click and select "Save Target As" to download the video (.avi)]] | + | [[media:ICE_simulation.avi|Right-click and select "Save Target As" to download the video (.avi format).]] |
| + | |||
| + | See also [http://www.youtube.com/watch?v=T9cbcWK8tZI ''Four Stroke Internal Combustion Engine''] on YouTube, modeled by the same authors. | ||
| + | |||
| + | =Links= | ||
| + | |||
| + | [http://auto.howstuffworks.com/engine1.htm ''How Stuff Works: Internal Combustion''] | ||
| + | |||
| + | [http://www.briggsandstratton.com/display/router.asp?DocID=64103 ''Briggs and Stratton''] | ||
| + | |||
| + | [[Bucknell Mechanical Design]] | ||
| + | |||
| + | =Authors= | ||
| + | |||
| + | All writing, CAD models, dynamic simulation, finite element analyses, and dissection photos by Matthew D'Agostino, Eric Oswald, and Stephen Parker - [http://www.bucknell.edu ''Bucknell University''] mechanical engineering students, class of 2008. | ||
Latest revision as of 00:07, 29 April 2007
Contents |
Description
The engine is designed to power a lawn mower blade in order to cut grass faster, easier, and more efficiently than man powered mowers and previous engine models. The engine in particular that was dissected and analyzed was a four-stroke lawn mower engine manufactured by Briggs and Stratton.
How It Works
This engine works on a four-stroke cycle. A manual crank starts the cycle while creating a vacuum to draw gas and air into the cylinder. Concurrently, an electrical current is produced to create a spark which would ignite the fuel-air mixture compressed in cylinder by the piston. This piston turns the camshaft through a linear-to-rotational energy conversion. The camshaft then turns the output of the motor, which is a blade, to cut the grass.
For a detailed bill of materials for the engine, refer to the following link:
Dissected Parts to an Internal Combustion Engine
Parts Analyzed for Design Decisions and Critical Features
Analysis of Engineering Specifications
Engineering Specifications Verified Quantitatively
Dynamic Simulation
<embed src="http://www.youtube.com/v/T8fM9TMMP4M" type="application/x-shockwave-flash" width="425" height="350"></embed>
Right-click and select "Save Target As" to download the video (.avi format).
See also Four Stroke Internal Combustion Engine on YouTube, modeled by the same authors.
Links
How Stuff Works: Internal Combustion
Authors
All writing, CAD models, dynamic simulation, finite element analyses, and dissection photos by Matthew D'Agostino, Eric Oswald, and Stephen Parker - Bucknell University mechanical engineering students, class of 2008.
