CONTROL APPARATUS FOR A VEHICLE

摘要

An internal combustion engine is provided that executes fuel injection and ignition with respect to a cylinder that remains stopped in an expansion stroke, and that performs ignition startup that starts up the internal combustion engine by rotationally driving a crankshaft by pressure of combustion accompanying the fuel injection. A motor generator (MG) that can rotationally drive the crankshaft is provided. A required assist torque Ast_trq exerted by the MG at the time of ignition startup is determined based on a maximum value Cyl_prss of an in-cylinder pressure that is detected by an in-cylinder pressure sensor at the time of ignition startup. The MG is controlled at the time of ignition startup based on the required assist torque Ast_trq that is determined.

主权项

1. A control apparatus for a vehicle including an internal combustion engine which includes a fuel injection valve for directly injecting fuel into a cylinder, a spark plug for igniting an air-fuel mixture, a crank angle sensor for detecting a crank angle, and an in-cylinder pressure sensor for detecting an in-cylinder pressure, and which is configured to perform ignition startup that executes fuel injection and ignition with respect to a cylinder that remains stopped in an expansion stroke and rotationally drives a crankshaft by means of a pressure of combustion that accompanies the fuel injection to thereby start up the internal combustion engine, the control apparatus comprising:
an electric motor that is configured to rotationally drive the crankshaft; and a controller that is configured to: determine an assist torque that the electric motor exerts to assist rotation of the crankshaft at a time of ignition startup, based on a local maximum value of an in-cylinder pressure detected by the in-cylinder pressure sensor at the time of ignition startup; and control the electric motor at the time of ignition startup based on the assist torque that is determined, wherein, prior to causing the electric motor to exert the assist torque that is determined, the controller controls the electric motor so as to exert a pre-assist torque that is lower than the assist torque.