Patent ID: 11859588
Assignee: NISSAN MOTOR CO., LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 8:
9. A device for controlling an internal combustion engine, the control device comprising:
an electric motor configured to rotate a crankshaft to start the internal combustion engine;
an air amount adjustment part configured to adjust an amount of air supplied into cylinders of the internal combustion engine;
a first control part configured to stop fuel injection to execute an automatic stoppage of the internal combustion engine when predetermined automatic stop conditions are met; and
a second control part configured to execute the following in response a request to restart the internal combustion engine while an engine speed of the internal combustion engine is decreasing due to the automatic stoppage:
restarting the internal combustion engine by resuming fuel injection without cranking the internal combustion engine upon determining that a state of a brake is a brake OFF state and the engine speed is equal to or higher than a rotational speed threshold, the rotational speed threshold defining a rotational speed lower limit at which restarting is possible by resuming fuel injection without cranking,
restarting the internal combustion engine by resuming fuel injection and cranking the internal combustion engine using an electric motor upon determining that the state of the brake is a brake ON state and the engine speed is equal to or higher than the rotational speed threshold, and
restarting the internal combustion engine by resuming fuel injection and cranking the internal combustion engine using the electric motor regardless of the state of the brake upon determining that the engine speed is lower than the rotational speed threshold.