This system lowers the generated voltage when the vehicle is not decelerating, and raises the generated voltage when the vehicle is decelerating. This reduces the load on the engine as a result of the electric generation of the generator, thus contributing to the fuel economy of the engine. When driving at a constant speed, this system regulates the generated voltage in order to place the amperage estimation value close to the target value.
This control consists of a battery sensor (battery state sensor assembly), generator assembly, an ECM and various sensors and switches.
The ECM detects the driving condition based on signals from various sensors, and detects the charging condition based on signals from the generator assembly and battery sensor (battery state sensor assembly).
The ECM stops the charging control and the generator switches to normal power generation mode under the following conditions:
Low battery capacity
Low or high battery temperature
Wipers operating, blower motor operating or taillight relay on
Battery sensor (battery state sensor assembly) malfunction
Communication failure (local communication between the generator assembly, ECM and the battery sensor (battery state sensor assembly))
Generator assembly malfunction
Accumulated driving time becomes approximately 30 hours.