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SVTPerformance's Chain of Restaurants
Road Side Pub
Engine trivia pop quiz
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<blockquote data-quote="SecondhandSnake" data-source="post: 16639222" data-attributes="member: 116684"><p>It's pretty basic engineering stuff. You're talking an Otto cycle engine. The net work developed over the cycle is represented by the area contained within the P-v curve. By increasing your compression ratio, you increase P2, or the pressure after the compression stroke (represented by 1-2.) Even if you assume that the energy transferred to the cylinder by combustion is the same between ratios, you end up with a greater area contained within the curve. Basically even though you put more work in on the compression stroke, your overall net work is greater, owing to the fact that P2 and P3 move up higher, resulting on an even higher work out during the power stroke as well.</p><p></p><p>[ATTACH=full]1710858[/ATTACH] </p><p></p><p>Cliff's: Work is area inside the curve. Compression ratio goes up, P2 and P3 are higher. Area is bigger. Work is higher.</p></blockquote><p></p>
[QUOTE="SecondhandSnake, post: 16639222, member: 116684"] It's pretty basic engineering stuff. You're talking an Otto cycle engine. The net work developed over the cycle is represented by the area contained within the P-v curve. By increasing your compression ratio, you increase P2, or the pressure after the compression stroke (represented by 1-2.) Even if you assume that the energy transferred to the cylinder by combustion is the same between ratios, you end up with a greater area contained within the curve. Basically even though you put more work in on the compression stroke, your overall net work is greater, owing to the fact that P2 and P3 move up higher, resulting on an even higher work out during the power stroke as well. [ATTACH=full]1710858[/ATTACH] Cliff's: Work is area inside the curve. Compression ratio goes up, P2 and P3 are higher. Area is bigger. Work is higher. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Road Side Pub
Engine trivia pop quiz
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