Automatic internal combustion engine stop device, internal combustion engine provided with the same and automatic internal combustion engine stop method

An internal combustion engine for a vehicle, comprising:

• an automatic stop device for an internal combustion engine that executes an automatic internal combustion engine stop control to stop the operation of the internal combustion engine after a predetermined automatic stop condition is satisfied, comprising:
• a load control unit that removes a load on the internal combustion engine or reduces the load to a predetermined level when the automatic stop condition is satisfied;
• a load recognition unit that recognizes a magnitude of the load acting on the internal combustion engine before the load is removed or reduced by the load control unit;
• and
• an ignition timing control unit, upon the satisfaction of the automatic stop condition, that calculates a difference between the magnitude of the load on the internal combustion engine before and after the automatic stop condition is satisfied in accordance with the magnitude of the load on the internal combustion engine, selects an ignition timing retard amount of an ignition plug such that the retard amount is increased the greater the difference between the magnitude of the load before and after the automatic stop condition is satisfied, and retards the ignition timing of the ignition plug by the retard amount at substantially the same moment as the load removing operation or the load reducing operation is executed by the load control unit, before the automatic stop control is initiated,
• wherein, when an internal combustion engine restart condition is satisfied after the internal combustion engine is stopped by the automatic stop device, fuel is supplied to an initial combustion target cylinder in an intake stroke in the stop condition and the ignition operation of the ignition plug is started when the cylinder performs an expansion stroke.

An automatic stop device that stops an internal combustion engine by stopping an ignition operation of an ignition plug and by cutting off a fuel supply after a predetermined automatic stop condition is satisfied, comprising:

• a load control unit that removes a load on the internal combustion engine when the automatic stop condition is satisfied;
• a load recognition unit that recognizes a magnitude of the load acting on the internal combustion engine before the load is removed by the load control unit;
• an ignition timing control unit, upon the satisfaction of the automatic stop condition, that selects an ignition timing retard amount of the ignition plug such that the retard amount is increased the greater the magnitude of the load on the internal combustion engine, recognized by the load recognition unit, before the satisfaction of automatic stop condition is satisfied, and retards the ignition timing of the ignition plug by the retard amount at substantially the same moment the load removing operation is executed by the load control unit;
• and
• an automatic stop unit that stops the internal combustion engine by stopping the ignition operation of the ignition plug and by cutting off the fuel supply when a speed of the internal combustion engine reaches a predetermined automatic stop operation triggering speed through the retarding of the ignition timing of the ignition plug by the ignition timing control unit.

An internal combustion engine for a vehicle, comprising:

• an automatic stop device that stops an internal combustion engine by stopping an ignition operation of an ignition plug and by cutting off a fuel supply after a predetermined automatic stop condition is satisfied, comprising:
• a load control unit that removes a load on the internal combustion engine when the automatic stop condition is satisfied;
• a load recognition unit that recognizes a magnitude of the load acting on the internal combustion engine before the load is removed by the load control unit;
• an ignition timing control unit, upon the satisfaction of the automatic stop condition, that selects an ignition timing retard amount of the ignition plug such that the retard amount is increased the greater the magnitude of the load on the internal combustion engine, recognized by the load recognition unit, before the satisfaction of automatic stop condition is satisfied, and retards the ignition timing of the ignition plug by the retard amount at substantially the same moment the load removing operation is executed by the load control unit;
• and
• an automatic stop unit that stops the internal combustion engine by stopping the ignition operation of the ignition plug and by cutting off the fuel supply when a speed of the internal combustion engine reaches a predetermined automatic stop operation triggering speed through the retarding of the ignition timing of the ignition plug by the ignition timing control unit,
• wherein, when an internal combustion engine restart condition is satisfied after the internal combustion engine is stopped by the automatic stop device, fuel is supplied to an initial combustion target cylinder in an intake stroke in the stop condition and the ignition operation of the ignition plug is started when the cylinder performs an expansion stroke.

An automatic stop method for an internal combustion engine that executes an automatic internal combustion engine stop control to stop the operation of an internal combustion engine after a predetermined automatic stop condition is satisfied, comprising:

• removing a load on the internal combustion engine or reducing the load to a predetermined level when the automatic stop condition is satisfied;
• recognizing a magnitude of the load acting on the internal combustion engine before the load is removed or reduced;
• calculating a difference between the magnitude of the load on the internal combustion engine before and after the automatic stop condition is satisfied in accordance with the magnitude of the load on the internal combustion engine;
• selecting an ignition timing retard amount of an ignition plug such that the retard amount is increased the greater the difference between the magnitude of the load before and after the automatic stop condition is satisfied;
• and
• retarding the ignition timing of the ignition plug by the retard amount at substantially the same moment as the load removing operation or the load reducing operation is executed, before the automatic stop control is initiated.

An automatic stop method for automatically stopping an internal combustion engine by stopping an ignition operation of an ignition plug and by cutting off a fuel supply after satisfaction of a predetermined automatic stop condition for the internal combustion engine, comprising:

• removing a load on the internal combustion engine when the automatic stop condition is satisfied;
• recognizing a magnitude of the load acting on the internal combustion engine before the load is removed;
• selecting an ignition timing retard amount of the ignition plug such that the retard amount is increased the greater the magnitude of the load before the automatic stop condition is satisfied;
• retarding the ignition timing of the ignition plug by the retard amount at substantially the same moment the load removing operation is executed;
• and
• stopping the internal combustion engine by stopping the ignition operation of the ignition plug and by cutting off the fuel supply when a speed of the internal combustion engine reaches a predetermined automatic stop operation triggering speed through the retarding of the ignition timing of the ignition plug.

An automatic stop device for an internal combustion engine that executes an automatic internal combustion engine stop control to stop the operation of the internal combustion engine after a predetermined automatic stop condition is satisfied, comprising:

• load control means for removing a load on the internal combustion engine or reducing the load to a predetermined level when the automatic stop condition is satisfied;
• load recognition means for recognizing a magnitude of the load acting on the internal combustion engine before the load is removed or reduced by the load control means;
• and
• ignition timing control means, upon the satisfaction of the automatic stop condition, for calculating a difference between the magnitude of the load on the internal combustion engine before and after the automatic stop condition is satisfied in accordance with the magnitude of the load on the internal combustion engine, selecting an ignition timing retard amount of an ignition plug such that the retard amount is increased the greater the difference between the magnitude of the load on the internal combustion engine before and after the automatic stop condition is satisfied, and retarding the ignition timing of the ignition plug by the retard amount at substantially the same moment as the load removing operation or the load reducing operation is executed by the load control means, before the automatic stop control is initiated.

An automatic stop device that stops an internal combustion engine by stopping an ignition operation of an ignition plug and by cutting off a fuel supply after a predetermined automatic stop condition is satisfied, comprising:

• load control means for removing a load on the internal combustion engine when the automatic stop condition is satisfied;
• load recognition means recognizing a magnitude of the load acting on the internal combustion engine before the load is removed by the load control means;
• ignition timing control means, upon the satisfaction of the automatic stop condition, for selecting an ignition timing retard amount of the ignition plug such that the retard amount is increased the greater the magnitude of the load on the internal combustion engine, recognized by the load recognition means, before the satisfaction of automatic stop condition is satisfied, and retarding the ignition timing of the ignition plug by the retard amount at substantially the same moment the load removing operation is executed by the load control means;
• and
• automatic stop means for stopping the internal combustion engine by stopping the ignition operation of the ignition plug and by cutting off the fuel supply when a speed of the internal combustion engine reaches a predetermined automatic stop operation triggering speed through the retarding of the ignition timing of the ignition plug by the ignition timing control means.