Ignition timing control system for internal combustion engines

An ignition timing control system for an internal combustion engine having an intake passage having an inner wall surface and at least one combustion chamber, said ignition timing control system being associated with a fuel injection amount control system for calculating an amount of fuel to be supplied to said engine, based on operating conditions of said engine, correcting the calculated amount of fuel, based on an adherent amount of fuel adhering to said inner wall surface of said intake passage, and a carried-off amount of fuel to be carried off from said adherent fuel into each of said at least one combustion chamber of said engine, and injecting the corrected amount of fuel into said intake passage, said ignition timing control system comprising:

• engine operating condition-detecting means for detecting operating conditions of said engine including at least pressure within said intake passage;
• fuel supply recovery-detecting means for detecting whether said engine has been recovered from a fuel cut state where fuel supply to said engine is interrupted to a fuel supply state where fuel is supplied to said engine;
• ignition timing-calculating means for calculating ignition timing, based on operating conditions of said engine detected by said engine operating condition-detecting means;
• retard amount-calculating means for calculating a retard amount by which said ignition timing of said engine is to be retarded, based on operating conditions of said engine detected by said engine operating condition-detecting means when it is detected by said fuel supply recovery-detecting means that said engine has been recovered from said fuel cut state to said fuel supply state;
• and
• ignition timing-correcting means for correcting said ignition timing, based on said retard amount calculated by said retard amount-calculating means.