Internal combustion engine control device

An internal combustion engine control device, in which a margin torque that can be increased by ignition-timing adjustment such that ignition timing is shifted to an ignition-timing change side on which an engine output is decreased, while supplying an intake air quantity exceeding a given quantity corresponding to an actual engine output torque with respect to load fluctuations during idling operation is set, comprising:

• an engine control unit comprising a target torque arithmetic-calculation part configured to calculate a target torque of an internal combustion engine, the engine control unit configured to
• set the target torque such that the target torque increases, as an auxiliary load, acting on the internal combustion engine, increases,
• set the margin torque such that the target torque decreases, as a load of the internal combustion engine during idling operation increases, and
• calculate the margin torque as a value obtained by subtracting the auxiliary load, which has already acted on the internal combustion engine, from a summed value of all loads which may possibly act on the internal combustion engine during idling operation.

An internal combustion engine control device, in which a margin torque that can be increased by ignition-timing adjustment such that ignition timing is shifted to an ignition-timing change side on which an engine output is decreased, while supplying an intake air quantity exceeding a given quantity corresponding to an actual engine output torque with respect to load fluctuations during idling operation is set, comprising:

• an engine control unit including a target torque calculation means for calculating a target torque of an internal combustion engine, the engine control unit configured to
• set the target torque such that the target torque increases, as an auxiliary load, acting on the internal combustion engine, increases, and
• set the margin torque such that the margin torque decreases, as a load of the internal combustion engine during idling operation increases;
• and
• the engine control unit further comprising
• a torque-down rate calculation means for calculating a torque-down rate by dividing the margin torque by an output torque of the internal combustion engine obtained when the ignition timing has been set at a minimum advance for a best torque under a current operating condition;
• and
• an ignition-timing correction amount calculation means for calculating an ignition-timing correction amount of the internal combustion engine during idling operation, using the torque-down rate.

An internal combustion engine control device, in which a margin torque that can be increased by ignition-timing adjustment such that ignition timing is shifted to an ignition-timing change side on which an engine output is decreased, while supplying an intake air quantity exceeding a given quantity corresponding to an actual engine output torque with respect to load fluctuations during idling operation is set, comprising:

• an engine control unit including a target torque arithmetic-calculation part configured to calculate a target torque of an internal combustion engine, the engine control unit configured to
• set the target torque such that the target torque increases, as an auxiliary load, acting on the internal combustion engine, increases, and
• set the margin torque such that the margin torque decreases, as a load of the internal combustion engine during idling operation increases;
• and
• the engine control unit further comprising
• a torque-down rate arithmetic-calculation part configured to calculate a torque-down rate by dividing the margin torque by an output torque of the internal combustion engine obtained when the ignition timing has been set at a minimum advance for a best torque under a current operating condition;
• and
• an ignition-timing correction amount arithmetic-calculation part configured to calculate an ignition-timing correction amount of the internal combustion engine during idling operation, using the torque-down rate.