Question

What is brake specific fuel consumption of engine whose fuel consumption if 6 grams per second and power output is 90 kW?

(a) 0.24 kg/kWh

(b) 0.0667 kg/kWh

(c) 0.54 kg/kWh

(d) 0.44 kg/kWh

I have been asked this question in an international level competition.

My question is from Performance Parameters and Characteristics topic in chapter Automotive Electronics, Engine Performance Parameter & Testing of Automobile Engines of Automobile Engineering

Answer 1

The correct choice is (a) 0.24 kg/kWh

Best explanation: Brake specific fuel consumption = ṁf / bp where bp = brake power and ṁf = brake specific fuel consumption. Brake specific fuel consumption = 6 / 90 = 0.0667 g/kW-s = (0.0667 * 3600) / 1000 = 0.24 kg/kWh.