Group 7 - Lawn Mower Engine
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=Tecumseh 3 H.P, 4-Stroke Lawn Mower Engine: Model Number TNT100= | =Tecumseh 3 H.P, 4-Stroke Lawn Mower Engine: Model Number TNT100= | ||
| − | + | ==Introduction== | |
| + | A Tecumseh 3 H.P, 4-Stroke Lawn Mower Engine was dissected by Group 7, consisting of: | ||
| + | *Christopher Germain- Lead C.A.D. Designer and Modeling Representative | ||
| + | *Colton Steiner- Communications Diplomat and Project Adviser | ||
| + | *Gregory Muench- Technical Expert and Dissection Executive | ||
| + | *Julia Perot- Editor in Chief | ||
| − | + | ==Executive Summary== | |
| + | Group 7 dissected a small four-stroke Tecumseh lawnmower engine. Operation of the engine begins with the pull start, which turns the flywheel. When it is spinning, the magnetic plate in the flywheel generates current through the electromagnet, which passes to the spark plug. This creates an arc across the spark plug’s gap, igniting the compressed fuel/air mixture inside the engine. The explosion moves the piston, which rotates the crankshaft. A gear on the crankshaft engages with the camshaft, which turns the mower blades. | ||
| − | [http://gicl.cs.drexel.edu/wiki/ | + | The group received the engine broken and was not able to fix it, though it is in better condition than when we started. Initially, there were portions of the throttle assembly and a key shoved in to the engine instead of being assembled in their correct places ([http://gicl.cs.drexel.edu/wiki/Image:Lose_parts.JPG see Fig 1.9b]). There were quite a few cracks and broken pieces, including on the flywheel head and the cylinder head. The starter did not engage. Although it has been reassembled better than it was received, the engine will never be able to run because it has too many broken pieces. |
| − | [http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_- | + | This engine has quite a few components with varying degrees of complexity (see [http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_-_Coordination_Review#Component_Summary Component Summary]). A detailed model of the piston can be seen in the [http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_-_Coordination_Review#Solid_Modeled_Assembly Solid Modeled Assembly] section of the [http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_-_Coordination_Review Coordination Review]. |
== Request for Proposal == | == Request for Proposal == | ||
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[http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_-_Preliminary_Design_Review Preliminary Design Review] | [http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_-_Preliminary_Design_Review Preliminary Design Review] | ||
===Page Contents=== | ===Page Contents=== | ||
| − | |||
*Product Disassembly | *Product Disassembly | ||
| − | |||
*Causes for Corrective Action | *Causes for Corrective Action | ||
| − | ==Product Analysis== | + | ==Product Analysis/Coordination Review== |
[http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_-_Coordination_Review Coordination Review] | [http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_-_Coordination_Review Coordination Review] | ||
===Page Contents=== | ===Page Contents=== | ||
| Line 65: | Line 69: | ||
*Solid Modeled Assembly | *Solid Modeled Assembly | ||
*Engineering Analysis | *Engineering Analysis | ||
| + | |||
| + | ==Critical Design Review== | ||
| + | [http://gicl.cs.drexel.edu/wiki/Group_7_-_Lawn_Mower_Engine_-_Critical_Design_Review Critical Design Review] | ||
| + | ===Page Contents=== | ||
| + | *Reassembly Procedure | ||
| + | *Product Status | ||
Latest revision as of 10:57, 16 December 2009
Contents |
Tecumseh 3 H.P, 4-Stroke Lawn Mower Engine: Model Number TNT100
Introduction
A Tecumseh 3 H.P, 4-Stroke Lawn Mower Engine was dissected by Group 7, consisting of:
- Christopher Germain- Lead C.A.D. Designer and Modeling Representative
- Colton Steiner- Communications Diplomat and Project Adviser
- Gregory Muench- Technical Expert and Dissection Executive
- Julia Perot- Editor in Chief
Executive Summary
Group 7 dissected a small four-stroke Tecumseh lawnmower engine. Operation of the engine begins with the pull start, which turns the flywheel. When it is spinning, the magnetic plate in the flywheel generates current through the electromagnet, which passes to the spark plug. This creates an arc across the spark plug’s gap, igniting the compressed fuel/air mixture inside the engine. The explosion moves the piston, which rotates the crankshaft. A gear on the crankshaft engages with the camshaft, which turns the mower blades.
The group received the engine broken and was not able to fix it, though it is in better condition than when we started. Initially, there were portions of the throttle assembly and a key shoved in to the engine instead of being assembled in their correct places (see Fig 1.9b). There were quite a few cracks and broken pieces, including on the flywheel head and the cylinder head. The starter did not engage. Although it has been reassembled better than it was received, the engine will never be able to run because it has too many broken pieces.
This engine has quite a few components with varying degrees of complexity (see Component Summary). A detailed model of the piston can be seen in the Solid Modeled Assembly section of the Coordination Review.
Request for Proposal
Page Contents
- Initial Product Assessment
- Management Proposal
- Work Proposal
- Evaluation
- Dissection Tools
Preliminary Design Review
Page Contents
- Product Disassembly
- Causes for Corrective Action
Product Analysis/Coordination Review
Page Contents
- Causes For Corrective Action
- Component Summary
- Design Revisions
- Solid Modeled Assembly
- Engineering Analysis
Critical Design Review
Page Contents
- Reassembly Procedure
- Product Status
