System Description
The generator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged. The voltage output is controlled by the IC regulator.
Component Description
| Component part | Description | |
|---|---|---|
| Generator | Terminal "1" | Refer to " DESCRIPTION ". |
| Terminal "2" | Refer to " DESCRIPTION ". | |
| Terminal "3" | Refer to " DESCRIPTION ". | |
| Terminal "4" | Used for the power generation voltage variable control system. Refer to " SYSTEM DESCRIPTION ". | |
| Combination meter (Charge warning lamp) | The IC regulator warning function activates to illuminate the charge warning lamp if any of the following symptoms occur while generator is operating: Excessive voltage is produced. No voltage is produced. | |
| IPDM E/R | Used for the power generation voltage variable control system. Refer to " SYSTEM DESCRIPTION ". | |
Scheme 15
Power generation variable voltage control system has been adopted. By varying the voltage to the generator, engine load due to power generation of the generator is reduced and fuel consumption is decreased.
Note. When any malfunction is detected in the power generation variable voltage control system, power generation is performed according to the characteristic of the IC regulator in the generator.
| Component part | Description |
|---|---|
| Battery current sensor | The battery current sensor is installed on the battery cable at the negative terminal. The battery current sensor detects the charging/discharging current of the battery and sends a voltage signal to the ECM according to the current value detected. |
| ECM | The battery current sensor detects the charging/discharging current of the battery. The ECM judges the battery condition based on this signal. The ECM judges whether to request more output via the power generation voltage variable control according to the battery condition. When performing the power generation voltage variable control, the ECM calculates the target power generation voltage according to the battery condition and sends the calculated value as the power generation command value to the IPDM E/R. |
| IPDM E/R | The IPDM E/R converts the received power generation command value into a pulse width modulated (PWM) command signal and sends it to the IC regulator. |
| Generator (IC regulator) | The IC regulator controls the power generation voltage by the target power generation voltage based on the received PWM command signal. When there is no PWM command signal, the generator performs the normal power generation according to the characteristic of the IC regulator. |
Description
"B" terminal circuit supplies power to charge the battery and operate the vehicles electrical system.
The "L" terminal circuit controls the charge warning lamp. The charge warning lamp turns ON when the ignition switch is set to ON or START. When the generator is providing sufficient voltage with the engine running, the charge warning lamp turns OFF. If the charge warning lamp illuminates with the engine running, a malfunction is indicated.
The terminal "L" circuit controls the charge warning lamp. The charge warning lamp turns ON when the ignition switch is set to ON or START. When the generator is providing sufficient voltage with the engine running, the charge warning lamp turns off. If the charge warning lamp illuminates with the engine running, a malfunction is indicated.
The output voltage of the generator is controlled by the IC regulator at terminal "S" detecting the input voltage from battery.
The "S" circuit detects the battery voltage to adjust the generator output voltage with the IC voltage regulator.