The mean effective pressure is the fictitious pressure which would produce the same amount of net work that was produced during the power stroke cycle.
12.
If mean effective pressure is based on brake power ( bp ) then it is referred to as brake mean effective pressure ( bmep ).
13.
If mean effective pressure is based on brake power ( bp ) then it is referred to as brake mean effective pressure ( bmep ).
14.
Increasing the compression ratio is an easy change that improves the mean effective pressure ( MEP ), but leads to engine knocking from inconsistent detonation.
15.
Wankel engines operate better with a low pressure exhaust system, higher exhaust back pressure reducing mean effective pressure, more severely in peripheral intake port engines.
16.
When new, these engines were notable for their high efficiency as demonstrated by the BMEP ( brake mean effective pressures ) exerted upon the piston crowns.
17.
Mean effective pressure is also useful for initial design calculations; that is, given a torque, standard MEP values can be used to estimate the required engine displacement.
18.
Net indicated mean effective pressure ( IMEP n ) is calculated using the indicated power; i . e ., the pressure volume integral in the work per cycle equation.
19.
An early cutoff has greater thermodynamic efficiency but results in a lower Mean effective pressure so less average force on the piston and is used for running the engine at higher speeds.
20.
This would suggest a torque output of 5100-6750 Nm ( 3760-4980 lb-ft ) and also a brake mean effective pressure of 80-100 bar ."
