Patent ID: 6571775
Filing Date: 2003-06-03
Classification: F02D,Y02T

Abstract:
A fuel injection control device for an internal combustion engine, the engine comprising a plurality of cylinders which sequentially perform a combustion of fuel and a starter motor which cranks up the engine, each of the cylinders having an intake port and a fuel injector which injects fuel into the intake port and sequentially performing an intake stroke, a compression stroke, an expansion stroke and an exhaust stroke, the device comprising:a first sensor which detects a start of the starter motor; a second sensor which identifies a cylinder in a specific position in a specific stroke and generates a corresponding signal; a third sensor which detects a temperature of the engine; and a programmable controller programmed to: determine if the temperature is lower than a predetermined temperature; execute a cylinder-stroke identification identifying a present stroke of each cylinder based on the signal generated by the second sensor; control the fuel injectors to perform a preliminary fuel injection for all the cylinders when the temperature is lower than the predetermined temperature, during a period between the start of the starter motor and a first execution of the cylinder-stroke identification; and control the fuel injectors to perform a primary fuel injection for a cylinder in the exhaust stroke and for a cylinder in the intake stroke simultaneously, on the first execution of the cylinder-stroke identification.