Patent ID: 7177754
Filing Date: 2007-02-13
Classification: F02D,F02M,Y02T

Abstract:
1. A driving control method for an electrically controlled valve used for adjusting the quantity of feedback of exhaust gas to an intake part in an exhaust gas recirculation apparatus, the method characterized by comprising: finding a driving duty to a variable equivalent to a target quantity of feedback of exhaust gas by using a duty conversion map that is preset to provide a driving duty of the electrically controlled valve to a variable equivalent to a target quantity of feedback of exhaust gas; and finding a correction value to detected battery voltage and engine cooling water temperature by using a duty correction map that is preset to provide a correction value to the driving duty from battery power and engine cooling water temperature, then finding a new driving duty for driving the electrically controlled valve on the basis of the correction value and the former driving duty, and driving the electrically controlled valve with the new driving duty.