Fuel supply control method for multicylinder internal combustion engines

Claim 1

A fuel supply control method for an internal combustion engine having a plurality of cylinders, including calculating the quantity of fuel to be supplied to said engine in response to operating conditions of said engine, and sequentially supplying quantities of fuel corresponding to the calculated values into respective corresponding ones of said cylinders, the method comprising the steps of: (a) generating pulses of a timing signal equal in number to the number of said cylinders at predetermined crank angles of said engine per one cycle of said engine; (b) calculating the quantity of fuel to be supplied to said engine, in accordance with generation of said timing signal; (c) when a calculation started in said step (b) upon generation of an immediately preceding pulse of said timing signal is completed before a present pulse of said timing signal is generated, starting the supply of fuel in a quantity corresponding to a calculated value obtained by said calculation, immediately upon completion of said calculation; and (d) when said present pulse of said timing signal is generated before completion of said calculation started in said step (b) upon generation of said immediately preceding pulse of said timing signal, starting the supply of fuel in a quantity corresponding to a calculated value obtained by a latest calculation effected in said step (b) before the generation of said present pulse of said timing signal, immediately upon the generation of said present pulse of said timing signal.