Patent ID: 7472679
Filing Date: 2009-01-06
Classification: F01L,F02B,F02D,Y02T

Abstract:
1. A valve control device for an internal combustion engine comprising: an intake manifold for defining an intake air passage having first and second intake ports, which are located at a downstream side of the intake air passage, for each cylinder of the engine; an intake throttle valve located in the intake air passage at an upstream side of the first and second intake ports, such that intake air flows into mainly the first intake port to generate a swirl flow when an opening degree of the intake throttle valve is not larger than a predetermined value, and flows into both the first and second intake ports when the opening degree of the intake throttle valve is larger than the predetermined value; a first fuel injection valve located to inject fuel to the first intake port; a second fuel injection valve located to inject the fuel to the second intake port; and a control unit which controls the first fuel injection valve and the second fuel injection valve to allow an injection of the fuel from substantially only the first fuel injection valve into the first intake port while the intake air flows into mainly the first intake port when the opening degree of the intake throttle valve is not larger than about the predetermined value, and controls the first fuel injection valve and the second fuel injection valve to allow injections of the fuel from both the first fuel injection valve and the second fuel injection valve while the intake flows into both the first and the second intake ports when the opening degree of the intake throttle valve is larger than about the predetermined value.