Fuel injection control apparatus for internal combustion engine

A fuel supply control apparatus for use in a multicylinder internal combustion engine having a single fuel injection valve for supplying fuel to all the cylinders, comprising:

• means for generating fuel injection reference signals in synchronism with fuel intake strokes at every respective cylinder;
• means for allotting said reference signals to the respective cylinders;
• means for generating control signals for operating said fuel injection valve in response to said allotted reference signals;
• and
• control means for controlling the time interval between the generation of said allotted reference signal and the starting of the control signal for operating said fuel injection valve for supplying fuel to each cylinder independently of that supplied to other cylinders,
• whereby a uniform distribution of fuel is achieved among the respective cylinders.

A fuel supply control apparatus, for use in a multicylinder internal combustion engine having a plurality of cylinders and a fuel supply system of the type in which each cylinder of said plurality is supplied with fuel from the same fuel supply device, comprising:

• first means for generating, for the respective cylinders, respective reference signals in response to a prescribed state of operation of the respective cylinders;
• second means for generating, in response to said reference signals, successive control signals for operating said fuel supply device and thereby causing the supply of fuel to respective ones of said cylinders;
• and
• second means, coupled to said first means, for establishing the time of initiation of each respective control signal, for operating said fuel supply device to supply fuel to a respective cylinder, independently of the time of initiation of a control signal associated with another cylinder,
• whereby a uniform distribution of fuel is achieved among the respective cylinders.

A fuel supply control apparatus, for use in a multicylinder internal combustion engine having a plurality of cylinders and a fuel supply system therefor comprising:

• first means for generating, for each respective cylinder, a respective reference signal in response to a prescribed state of the operation of said cylinder;
• second means, responsive to the respective reference signals generated by said first means, for generating successive control signals for operating said fuel supply system and thereby causing the supply of fuel to said respective cylinder;
• and
• third means, coupled to said second means, for establishing the time of initiation of each respective control signal, for operating said fuel supply system to supply fuel to a respective cylinder, relative to its associated reference signal, independently of the time of initiation of a control signal associated with another cylinder.

For use in a fuel supply control apparatus, for use in a multicylinder internal combustion engine having a plurality of cylinders and a fuel supply system of the type in which each cylinder of said plurality is supplied with fuel from the same fuel supply device, and wherein fuel supply path characteristics of the fuel supply system are different among different ones of said cylinders, an arrangement for compensating for differences in said fuel supply path characteristics of said fuel supply system from said fuel supply device to said different ones of said cylinders and thereby attaining an optimum fuel distribution to the respective cylinders of said plurality comprising:

• first means for generating, for each respective cylinder, a respective reference signal in response to a prescribed state of the operation of said cylinder;
• second means, responsive to the respective reference signals generated by said first means, for generating successive control signals for operating said fuel supply device and thereby causing the supply of fuel to said respective cylinder;
• and
• third means, coupled to said second means, for establishing the time of initiation of each respective control signal, for operating said fuel supply device to supply fuel to a respective cylinder, relative to its associated reference signal, in accordance with the characteristics of the fuel supply path from said fuel supply device to said respective cylinder.