VACUUM PRESSURE CONTROL APPARATUS FOR BRAKE BOOSTER ON VEHICLE AND METHOD THEREOF

摘要: PURPOSE: A vacuum pressure control device and method for a vehicle brake are provided to obtain stable reduce the activation time of catalyst by retarding spark timing according during operation an engine. CONSTITUTION: comprises steps of: measuring engine start(S103), determining whether measured is equal or less than fixed reference value, value(S106), returning normal after completion activation(S109).