friction mean effective pressure

That part of the indicated mean effective pressure (IMEP) used to overcome internal friction in a combustion chamber of a reciprocating engine. The difference between the IMEP and the brake mean effective pressure (BMEP) is the FMEP. The FMEP and the BMEP provide a convenient means of representing pressure limits or rating engine performance throughout its entire operating range.

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  • indicated mean effective pressure — The average pressure produced in the combustion chamber during the operating cycle. It is an expression of the theoretical, frictionless power known as indicated horsepower. In addition to completely disregarding power lost to friction, indicated …   Aviation dictionary

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  • Indicated horse power — Horse power Horse pow er 1. The power which a horse exerts. [1913 Webster] 2. (Mach.) A unit of power, used in stating the power required to drive machinery, and in estimating the capabilities of animals or steam engines and other prime movers… …   The Collaborative International Dictionary of English

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