1. The problem statement, all variables and given/known data The brake fuel conversion efficiency of an egine is 0.3. The mechanical efficiency is 0.8. The combustion efficiency is 0.94. The heat losses to the coolant and oil are 60 kW. The fuel chemical energy entering the engine per unit time, (m_f * Q_HV), is 190 kW. What percentage of this energy becomes Brake work Friction work Heat losses Exhaust chemical energy Exhaust sensible energy 2. Relevant equations ? 3. The attempt at a solution I don't know how to start this problem.