Charging System: Description and Operation: Overview

Charging System

Overview

The generator is driven by the accessory drive belt. When the engine is started, the generator begins to generate AC (Alternating Current) which is internally converted to DC (Direct Current). The DC (Direct Current) is controlled by the voltage regulator (located on the rear of the generator) and supplied to the battery. The PCM (Powertrain Control Module) controls the voltage regulation setpoint, working with the generator internal voltage regulator over 2 control and communication circuits.

This vehicle is equipped with load shed strategy. With the engine off, the BCM (Body Control Module) monitors the battery state of charge using the battery current sensor attached to the negative battery cable. With the engine running, the BCM (Body Control Module) monitors system voltage to the BCM (Body Control Module) and PSCM (Power Steering Control Module).

The PCM (Powertrain Control Module) monitors the generator current using the generator current sensor attached to the generator B+ battery cable. The information supplied to the PCM (Powertrain Control Module) from the generator current sensor is used by the PCM (Powertrain Control Module) to adjust the engine idle stability and torque control.