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	<title>Engine Science Camshafts and Pistons</title>
	<link>http://www.enginescience.maxa1.com</link>
	<description></description>
	<lastBuildDate>Thu, 27 May 2010 19:50:59 +0000</lastBuildDate>
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		<title>Engine&#8217;s Camshaft</title>
		<description><![CDATA[A camshaft primer: the mystique of valve motion &#8230; as regulated by the shaft with the cams on it
To many of us, knowledge of an engine&#8217;s camshaft stops at lift and duration. Or perhaps it doesn&#8217;t even really go that far. So often, it seems, we tend to understand and select a particular cam on [...]]]></description>
		<link>http://www.enginescience.maxa1.com/2010/04/15/hello-world/</link>
			</item>
	<item>
		<title>Maximum Lift</title>
		<description><![CDATA[ It&#8217;s also the portion of a cam on which the follower rides during times when the valve is seated. At the first increase of this base circle dimension, a given cam follower begins motion up the lobe &#8220;flank.&#8221; This ascension continues until the follower reaches the maximum amount of displacement up the flank (maximum [...]]]></description>
		<link>http://www.enginescience.maxa1.com/2010/04/15/maximum-lift/</link>
			</item>
	<item>
		<title>Position of the Camshaft</title>
		<description><![CDATA[Let&#8217;s say a cam is ground with an intake event of 36 degrees opening before TDC and an exhaust closing event of 40 degrees after TDC. Overlap period would be 76 crankshaft degrees.
As the overlap period increases, there is less valve seated time available, resulting in higher engine rpm required to generate adequate cylinder pressure. [...]]]></description>
		<link>http://www.enginescience.maxa1.com/2010/04/15/position-of-the-camshaft/</link>
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		<title>Amount of Lift</title>
		<description><![CDATA[It is at this point when the valve is being &#8220;dwelled&#8221; in its open position—no (or relatively little) upward or downward motion—that the line of action between cam lobe and lifter lies along the follower&#8217;s axis.
At all other times, there is a &#8220;pressure angle&#8221; (as shown in the illustrations) that tends to produce a side [...]]]></description>
		<link>http://www.enginescience.maxa1.com/2010/04/15/amount-of-lift/</link>
			</item>
	<item>
		<title>Pistons</title>
		<description><![CDATA[Pistons and rings as they relate to an internal combustion engine
The burning of air and fuel inside an engine creates both heat and pressure. It is the job of pistons and piston rings to contain this pressure so that the maximum amount of work is transmitted to the engine&#8217;s crankshaft and vehicle drivetrain. There is [...]]]></description>
		<link>http://www.enginescience.maxa1.com/2010/04/15/pistons/</link>
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		<title>And Rings or Fries</title>
		<description><![CDATA[Let&#8217;s now get into some of the functional considerations in the understanding of both pistons and rings.
There are five basic design features of a piston. It should (1) reduce operating friction, (2) transfer maximum heat to the cylinder walls, (3) be of low net weight, (4) provide necessary piston pin support (to cylinder pressure loading), [...]]]></description>
		<link>http://www.enginescience.maxa1.com/2010/04/15/and-rings/</link>
			</item>
	<item>
		<title>Groove Ring Man</title>
		<description><![CDATA[Because this design incorporates 360-degree support of the ring belt area, there is excellent transfer of heat and retardation of piston ring groove deflection. This particular feature reduces the criticalness of machining tolerance requirements and makes for a less expensive piece to produce, unless material costs are higher than for a comparable design.
The closed-type design [...]]]></description>
		<link>http://www.enginescience.maxa1.com/2010/04/15/groove-ring-man/</link>
			</item>
	<item>
		<title>Fouled Spark Plugs</title>
		<description><![CDATA[Piston ring breakage can result from a variety of conditions. Excessive side clearance, detonation, ring-end deflection leading to the cocking of rings in their respective grooves, and ring sticking are all sources of ring failure. Insufficient end gap can also lead to ring failure. Such a problem can result in damaged or broken rings and [...]]]></description>
		<link>http://www.enginescience.maxa1.com/2010/04/15/72/</link>
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