Patent ID: 6223728
Filing Date: 2001-05-01
Classification: F02D,Y02T

Abstract:
An engine control apparatus comprising:a reference pulse width calculating means for calculating the width of the reference pulse used as the reference when a fuel injection pulse width is calculated based on operating conditions,a target A/F ratio calculating means for calculating the target A/F ratio based on the operating conditions,a target throttle opening calculating means for calculating the target throttle opening based on the operating condition including the target A/F ratio,a fuel injection phase correcting means for calculating the width of a filtering reference pulse by time-filtering the reference pulse width,whereby the fuel injection amount is calculated based on the filtering reference pulse width and the fuel injection control is performed,said fuel injection phase correcting means calculating air-response time constant of a cylinder intake air flow based on the target air flow calculated by the target air flow calculating means, the cylinder intake air flow calculated or detected the intake air flow calculating means and the cylinder intake air flow previously calculated or detected, and obtained the filtering reference pulse width by using the air-response time constant as a time-filter.