Patent ID: 8504279
Filing Date: 2013-08-06
Classification: F02D,F02N,Y02T

Abstract:
1. An engine automatic stop and restart apparatus, comprising: an engine ECU comprising: a controller which controls a starter motor for starting the engine, based on results of the judgment, calculation, and control made by the engine ECU, wherein the engine ECU further comprises an engagement completion judgment unit which judges whether or not a pinion gear for transmitting a torque of the starter motor to a ring gear connected to the engine is completely engaged with the ring gear, wherein the controller drives and rotates the pinion gear when the engine automatic stop judgment unit judges that the engine automatic stop condition is satisfied so that the fuel injection control unit stops the fuel supply to the engine and the ignition control unit stops the ignition of the engine, and when the engine restart judgment unit judges that the engine restart condition is satisfied before the engine stops, and wherein the controller starts engagement between the ring gear and the pinion gear when a deviation between the rpm of the engine detected by the engine rpm calculation unit and an rpm of the pinion gear becomes smaller than a predetermined threshold value, and inhibits the ignition made by the ignition control unit during a period from start of the engagement until the engagement completion judgment unit judges that the engagement is completed.