SYSTEM CONTROL
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 electric generation of the generator, thus contributing to improved fuel economy. When idling or 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 the generator control ECU assembly with a built-in battery current sensor, battery temperature sensor, generator assembly, ECM, various sensors and switches.
The ECM detects the driving conditions based on signals from various sensors and switches. The generator control ECU assembly detects the charging condition based on signals from the generator assembly, battery current sensor and battery temperature sensor. The ECM determines the vehicle driving conditions, and based on this information, the generator control ECU assembly sends a voltage request signal to the generator assembly.
The generator control ECU assembly stops 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 tail light relay ON
Battery current sensor or battery temperature sensor malfunction
Engine started
Communication failure (Local communication between generator control ECU assembly and ECM)
Generator assembly malfunction
Battery charged for approximately 2.5 to 4 hours
Accumulated driving time becomes approximately 20 hours