brake:刹车、制动
specific:这里是比率的意思,很多情况下都译为“xx比”
Brake Specific Fuel Consumption 制动燃油消耗率
Brake specific fuel consumption ( BSFC ) is a measure of fuel efficiency within a shaft reciprocating engine .It is the rate of fuel consumption divided by the power produced.BSFC allows the fuel efficiency of different reciprocating engines to be directly compared.
To calculate BSFC, use the formula BSFC = Fuel rate / Power