Brake Mean Effective Pressure (BMEP)
Break mean effective pressure (BMEP) is a function of temperature of gas. If we have to increase the temperature it can be done in either of the two ways-
1. By burning more fuel.
2. By efficiently burning the existing fuel.
BMEP finds its use in torque and hence HP as torque is a function of BMEP and displacement and HP is the function of torque and RPM.
An engine with high BMEP and low RPM produces same power as the engine with low BMEP and high RPM. BMEP means the average pressure in all the strokes. To increase the BMEP larger valves and ports can be used and no. Of cylinders can also be increased which on efficient working can increase the mean effective pressure and hence can increase the BMEP.
For 2 stroke engine BMEP= 6500*HP/L*RPM
For 4 stroke engine BMEP= 13000*HP/L*RPM
1. By burning more fuel.
2. By efficiently burning the existing fuel.
BMEP finds its use in torque and hence HP as torque is a function of BMEP and displacement and HP is the function of torque and RPM.
An engine with high BMEP and low RPM produces same power as the engine with low BMEP and high RPM. BMEP means the average pressure in all the strokes. To increase the BMEP larger valves and ports can be used and no. Of cylinders can also be increased which on efficient working can increase the mean effective pressure and hence can increase the BMEP.
For 2 stroke engine BMEP= 6500*HP/L*RPM
For 4 stroke engine BMEP= 13000*HP/L*RPM
Where HP is horse power and L is displacement in litres.
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