Vehicular power generation system and power generation control method for the same

摘要

A vehicular power generation system includes: a battery which is charged by power generation electric power of a generator that is driven by an internal combustion engine; and a power generation control device which reduces the amount of fuel to be consumed for power generation of the internal combustion engine. The power generation control device includes: a unit which sets an operating range that is small in the amount of fuel to be consumed for an increase in torque of the internal combustion engine; a unit which sets electric power with high power generation efficiency to a target value of power generation electric power according to rotation speed and power generation voltage of the generator; and a unit which controls so that the amount of power generation of the generator is a target value when the operating point of the internal combustion engine is in the operating range.

主权项

1. A vehicular power generation system comprising:
a generator which is driven by an internal combustion engine and performs power generation; a battery which is charged by power generation electric power of said generator; and a power generation control device which reduces the amount of fuel to be consumed by said internal combustion engine during power generation, wherein said power generation control device includes: a unit which sets a power generation execution operating range that is small in the amount of fuel to be consumed for an increase in torque of said internal combustion engine; a detection unit which detects an operating point of said internal combustion engine based on a rotation speed and one of a torque, intake manifold pressure, and a charging efficiency; a setting unit which calculates a target value of a power generation current with high power generation efficiency based on a rotation speed and a power generation voltage of said generator when the operating point detected by said detection unit is in the power generation execution operating range, and sets electric power generation with high power generation efficiency to a target value from the calculated target value of power generation current; and a control unit which controls so that a generated electric power of said generator is the target value when an operating point of said internal combustion engine is in the power, generation execution operating range, and does not execute control in which a generated electric power of said generator is the target value when the operating point of said internal combustion engine is not in the power generation execution operating range.