brake mean effective pressure
- A measure of mean effective pressure in a cylinder of a reciprocating engine. It is the average in excess of ambient pressure inside the cylinder during the power stroke. It is measured in pounds per square inch (psi), kilopascals (kPa), or bars and relates to torque produced by the engine. BMEP can be calculated if the brake horsepower and RPM of the engine are known. BMEP is that portion of indicated mean effective pressure (IMEP) that produces brake horsepower. The remaining pressure used to overcome internal friction is called friction mean effective pressure (FMEP).
Aviation dictionary. 2014.
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brake mean effective pressure — noun the average (mean) pressure which, if imposed on the pistons uniformly from the top to the bottom of each power stroke, would produce the measured (brake) power output. Syn: BMEP … Wiktionary
brake mean effective pressure — (BMEP) The average pressure in the cylinders of an engine divided by its mechanical efficiency, i.e., the ratio of the power actually delivered at an output shaft to the power developed in the cylinders. It is used as an indication of torque … Dictionary of automotive terms
Mean effective pressure — The mean effective pressure is a quantity related to the operation of an reciprocating engine and is a valuable measure of an engine s capacity to do work that is independent of engine displacement. When quoted as an indicated mean effective… … Wikipedia
mean effective pressure: (MEP) — The average pressure of the burning fuel on the power stroke subtracted by the average pressure on the other three strokes. Pressure is in pounds per square inch. Average pressure on a surface when a changing pressure condition exists. Also see… … Dictionary of automotive terms
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 … Aviation dictionary
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
effective pressure — See brake mean effective pressure indicated mean effective pressure mean effective pressure … Dictionary of automotive terms
pressure —  The force due to the weight of a substance exerted over the area the substance occupies. In metric measure, it is the force acting on each square metre. To calculate pressure, divide the force (in newtons) by the area (in square metres). It… … Dictionary of automotive terms
brake horsepower — The power delivered to the propeller shaft (main drive or main output) of an aircraft engine. It is the difference between the horsepower delivered by the engine and that consumed by friction. The actual horsepower received by the propeller of an … Aviation dictionary
Brake 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