Slip control system for an automotive vehicle

A slip control system for an automotive vehicle, comprising:

• a slip amount detecting means for detecting an amount of a slip of a driving wheel with respect to the surface of a road;
• an ignition timing adjusting means for adjusting a timing of ignition of an internal combustion engine having multiple cylinders;
• a rpm detecting means for detecting a number of revolutions of the engine;
• an ignition timing control means for controlling said ignition timing adjusting means by retarding the timing of ignition of the engine to thereby prevent the slip amount detected by said slip amount detecting means from becoming excessive, said ignition timing adjusting means comprising a first adjusting means for adjusting the timing of ignition and a second adjusting means for adjusting supply of fuel discretely to each of the multiple cylinders;
• and
• an inhibition means for inhibiting the timing of the ignition from being retarded by said ignition timing control means at the time when the number of revolutions of the engine detected by said rpm detecting means is equal to or higher than a given number of revolutions of the engine, said ignition timing control means comprising a first control means and a second control means, said first control means being so adapted as to reduce the output of the engine by retarding the timing of ignition for all cylinders of the engine by controlling said first adjusting means and said second control means being so adapted as to reduce the output of the engine by cutting supply of fuel to a partial number of the multiple cylinders thereof.