( Automotive engineering : Design and performance )
Brake mean effective pressure is an indication of engine efficiency regardless of capacity or engine speed.
Brake mean effective pressure is a widely used measure of the load imposed on an engine.
The brake was the device once used for measuring engine torque. The pressure is the
pressure in the engine cylinder. The ‘effective’ pressure is the pressure that produces
the torque, and ‘mean’ implies its average value, although it is changing all the
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