Fuel control system for internal combustion engines

A fuel control system for an internal combustion engine having at least one cylinder with an injector, comprising:

• first means for inputting a throttle opening .theta..sub.th and an engine speed N.sub.e to generate a basic injection pulse width T.sub.p ;
• second means for detecting a peak value .theta..sub.pmax of pressures in said cylinder of said engine during each cycle thereof to calculate an average value .theta..sub.pmax of said peak values and determine whether a difference (.theta..sub.pmax -.theta..sub.pmax) between said average value .theta..sub.pmax and a peak value .theta..sub.pmax during each cycle is within a tolerance .epsilon. whereby when said difference is greater than said tolerance a correction factor .alpha. is established in a direction tending to decrease said difference;
• third means for calculating an injection time T.sub.i of said injector in accordance with said basic injection pulse width T.sub.p from said first means and said correction factor .alpha.;
• and
• fourth means for energizing said injector for the duration of said injection time T.sub.i from said third means.