Lubrication system of an internal combustion engine

A lubrication system of an internal combustion engine comprising:

• a generator that generates electricity by making use of the power generated by the internal combustion engine;
• a heating mechanism that heats lubricating oil of the internal combustion engine by making use of the energy generated when said generator carries out a power generation operation;
• a first detection unit that detects the temperature of the lubricating oil before the lubricating oil passes through said heating mechanism;
• a first calculation unit that calculates an amount of decrease of an engine load due to the heating of the lubricating oil by said heating mechanism by the use of a detected value of said first detection unit as a parameter;
• a second calculation unit that calculates an amount of increase of the engine load due to the power generation operation of said generator which is carried out in order to supply the energy to said heating mechanism;
• and
• a control unit that permits said generator to carry out the power generation operation in order to supply energy to said heating mechanism in cases where a result of the calculation of said first calculation unit exceeds a result of the calculation of said second calculation unit.