Electricity generation control device for vehicle

An electricity generation control device, comprising:

• an engine as a power source of a vehicle;
• a continuously variable transmission that steplessly changes the power of the engine to transmit it to drive wheels of the vehicle;
• an electricity generator that rotates following a drive shaft of the engine and can variably controls an electricity generation amount;
• an electrical storage device that is charged by the electricity generator and supplies the charged power to electrical loads of the vehicle;
• an engine rotation speed detecting unit that detects a rotation speed of the engine;
• an engine drive torque control unit that controls a drive torque value of the engine;
• an electricity generator rotation speed detecting unit that detects a rotation speed of the electricity generator;
• an electricity generation drive torque control unit that controls a drive torque value of the electricity generator;
• a fuel consumption amount calculating unit that calculates a fuel consumption amount from values of the engine rotation speed and the engine drive torque;
• an electricity generation amount calculating unit that calculates an electricity generation amount of the electricity generator from values of the electricity generator rotation speed and the electricity generation drive torque;
• a transmission gear ratio changing unit that, at a time of virtually changing a transmission gear ratio of the continuously variable transmission with a minute amount, calculates a virtual engine drive torque and a virtual engine rotation speed to maintain a present speed and a present driving force of the vehicle, calculates a virtual electricity generation efficiency from a virtual fuel consumption amount calculated from the virtual engine drive torque and the virtual engine rotation speed by the fuel consumption amount calculating unit and a virtual electricity generation amount calculated from the virtual engine rotation speed and the electricity generation drive torque by the electricity generation amount calculating unit, calculates a present electricity generation efficiency from a present fuel consumption amount and a present electricity generation amount, and changes the transmission gear ratio of the continuously variable transmission with the minute amount in a case where the virtual electricity generation efficiency is superior to the present electricity generation efficiency;
• and
• an electricity generation drive torque changing unit that, at the time of virtually changing the engine drive torque or the electricity generation drive torque with a minute amount, calculates a virtual electricity generation efficiency from the virtual fuel consumption amount calculated by the fuel consumption amount calculating unit and the virtual electricity generation amount calculated by the electricity generation amount calculating unit, calculates a present electricity generation efficiency from a present fuel consumption amount and a present electricity generation efficiency, and changes the engine drive torque and the electricity generation drive torque with the minute amount, in a case where the virtual electricity generation efficiency is superior to the present electricity generation efficiency,
• wherein the transmission gear changing unit and the electricity generation drive torque changing unit are alternately operated to perform the electricity generation.