Output control system for internal combustion engine

An output control system for a multi-cylinder internal combustion engine comprising:

• first means for providing an engine output control command indicative of an engine output restriction magnitude;
• second means active at every combustion timing, for computing the engine output restriction magnitude achieved up to the current combustion timing and making decision whether the cylinder schedules for combustion at the current combustion timing is to be placed in resting condition on the basis of the achieved engine output restriction magnitude and the engine output restriction magnitude commanded by said engine output control command;
• third means for monitoring engine output restricting operation and storing data indicative of said achieved engine output restriction magnitude, said third means updating said data whenever said second means makes decision;
• and
• fourth means for controlling combustion of the cylinder scheduled for combustion at the current combustion timing depending upon the decision made by said second means.

A traction control system comprising:

• first means for monitoring wheel slippage at driving wheel on the basis of wheel speeds at respective wheels;
• second means for providing an engine output control command indicative of an engine output restriction magnitude;
• third means active at every combustion timing, for computing the engine output restriction magnitude achieved up to the current combustion timing and making decision whether the cylinder schedules for combustion at the current combustion timing is to be placed in resting condition on the basis of the achieved engine output restriction magnitude and the engine output restriction magnitude commanded by said engine output control command;
• fourth means for monitoring engine output restricting operation and storing data indicative of said achieved engine output restriction magnitude, said fourth means updating said data whenever said second means makes decision;
• and
• fifth means for controlling combustion of the cylinder scheduled for combustion at the current combustion timing depending upon the decision made by said third means.

An output control system for an internal combustion engine having a plurality of cylinders comprising

• engine output lowering magnitude commanding means for outputting an engine output control command indicative of a magnitude to lower the output the engine having a plurality of cylinders;
• calculation means for calculating number of cylinders to be placed in resting condition on the basis of the commanded engine output lowering magnitude;
• engine operating condition judgement means for making judgement whether the cylinder scheduled for next combustion is to be placed into the resting state or not on the basis of the number of cylinders to be placed in resting condition calculated by said calculation means;
• cylinder resting performing means for disabling combustion at the combustion timing for which resting is determined by the engine operating condition judgement means;
• storage means for storing the results of judgement made by the engine operating condition judgement means for predetermined number of immediately preceding combustion timings, which predetermined number is at least a value subtracting one from the number of the cylinders,
• said engine operating condition judgement means comparing the number of cylinders to be placed in resting condition calculated by said calculation means and the number of cylinders placed in resting condition in preceding combustion timings, to make judgement whether the cylinder scheduled for next combustion is to be placed in resting condition or not on the basis of the result of comparison.