Throughout this site we use many technical terms, and given the breadth of readership our site enjoys, sometimes we are remiss and incorrectly assume everyone knows what we are referring to. For those that do not, here are some explanations of the technical terms use.
Heat Control (of piston)
Design artifices to ensure that a piston crown maintains a desired temperature to produce good thermal efficiency but does not reach a sufficiently excessive temperature which would promote pre-ignition and eventual failure of the piston material. At the same time it is desirable to keep the piston-skirt cool to prevent undue expansion. Thus a piston could be operating with a crown temperature of 250CC (483�F) while the lower skirt is at 110�C (230�F). To this end horizontal slots may be cut in the piston walls to reduce the heat path or a heat dam may be employed.
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