Air Flow Control

Air Flow Reduction Control During Stop/Start Operation

• A/C Auto Amp. reduces duty ratio of Blower Motor control signal to Blower Motor to decrease air flow.
• Due to reduced air flow, the amount of air that passes evaporator is reduced to moderate increase of evaporator temperature. This helps prevent stop/start prohibition condition (evaporator temperature) from being met and prolongs stop/start operation time.
• Also, decrease of voltage applied to Blower Motor reduces power consumption. This moderates alternator power output after engine is restarted.