If it is based on indicated power ( ip ) it is called indicated mean effective pressure ( imep ) . friction mean effective power is the difference of imep and bmep,
22.
The theory behind this sort of arrangement is that maximum brake mean effective pressure ( BMEP ) is developed at relatively low engine speeds, resulting in an engine with a broad torque curve.
23.
This is equal to 305 bhp / liter ( 5.0 bhp / cu . in ) and a brake mean effective pressure ( bmep ) of 483 lb / sq . in.
24.
However, it is important to remember that mean effective pressure does not reflect the actual pressures inside an individual combustion chamber although the two are certainly related and serves only as a convenient measure of performance.
25.
Aside from looking at the power that the engine can produce, the Mean Effective Pressure ( MEP ), can also be used in comparing the power output and performance of reciprocating engines of the same size.
26.
Sometimes the term FMEP ( friction mean effective pressure ) is used as an indicator of the mean effective pressure lost to friction ( or friction torque ) and is just the difference between IMEP n and BMEP.
27.
Sometimes the term FMEP ( friction mean effective pressure ) is used as an indicator of the mean effective pressure lost to friction ( or friction torque ) and is just the difference between IMEP n and BMEP.
28.
They were dubbed the " Mitteldruckmotor " ( medium-pressure engines ) because of their unusually high BMEP ( mean effective pressure, as calculated from brake torque ) values, which led to a good thermodynamic effiency.
29.
Since the range of maximum brake mean effective pressures for good engine designs is well established, we now have a displacement-independent measure of the torque-producing capacity of an engine design ( a specific torque of sorts ).
30.
Starting tractive effort calculated in the usual way ( 85 % mean effective pressure ) comes out, but the engine used 70 % limited cutoff ( presumably to increase port openings at short cutoff ) so the railroad claimed a correspondingly lower tractive effort.
