Patent ID: 7322331

Claim:
An internal combustion engine starting control system for a vehicle which has an internal combustion engine as a driving source of the vehicle, the system comprising: a motor for driving the internal combustion engine; and a control device for performing driving control of the motor by making an actual rotation speed of the motor approach a predetermined target rotation speed, wherein: the driving control is a response designation feedback control based on a predetermined state quantity of the vehicle, the control device includes: a response designation parameter setting device for setting a response designation parameter based on a predetermined state of the vehicle, so as to determine a convergence speed when the actual rotation speed of the motor is made to converge to the predetermined target rotation speed; a switching function setting device for setting a switching function based on a response designation parameter and the difference between the actual rotation speed and the predetermined target rotation speed of the motor; and the control device computes a torque command so that the switching function set by the switching function setting device has a predetermined value.