Introduction Internal combustion engine design for the mass market ...
Introduction Internal combustion engine design for the mass market ...
Introduction Internal combustion engine design for the mass market ...
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Advantages of <strong>the</strong> two stroke <strong>engine</strong>:<br />
Power to weight ratio is higher than <strong>the</strong> four stroke <strong>engine</strong> since <strong>the</strong>re is<br />
one power stroke per crank shaft revolution.<br />
No valves or camshaft, just ports<br />
In <strong>the</strong> past used <strong>for</strong> small <strong>engine</strong> applications such as boats,<br />
motorcross, snowmobiles, lawn mowers. Currently only used <strong>for</strong> weed<br />
whackers and chain saws<br />
Disadvantages of <strong>the</strong> two-stroke <strong>engine</strong>:<br />
Incomplete scavenging – limits power<br />
Fuel-air “short circuiting” – low fuel efficiency, high HC emission<br />
Burns oil mixed in with <strong>the</strong> fuel – high HC emission<br />
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