Patent ID: 7607410
Filing Date: 2009-10-27
Classification: F01L,F02D,F02M,Y02T

Abstract:
1. A method for controlling fuel injection into an engine of a vehicle, the engine having at least a variable intake valve timing system, the method comprising: cold starting the engine with the variable valve timing system at a default position; before the engine warms to a warm-up temperature, adjusting the variable intake valve timing system to generate an increase in positive valve overlap of at least one cylinder; adjusting a fuel injection amount in response to said increase in positive valve overlap, where said adjusting the fuel injection amount provides a decrease in injected fuel to account for an increase in fuel evaporating from the intake valve and/or the intake port as engine temperature warms; and adjusting spark timing in response to said adjusting of the variable intake valve timing system and further to maintain engine idle speed.