Internal combustion engine control system

An internal combustion engine control system for controlling an internal combustion engine of a vehicle, comprising:

• an accelerator pedal operation amount detecting section for detecting an accelerator pedal operation amount of the vehicle by a driver;
• a storage section that stores at least a first increase amount of a throttle opening degree with respect to an increase amount of an accelerator pedal operation amount as a first throttle opening degree characteristic and a second increase amount of a throttle opening degree larger than the first increase amount of a throttle opening degree with respect to the increase amount of an accelerator pedal operation amount as a second throttle opening degree characteristic;
• an operating section for selecting the second throttle opening degree characteristic corresponding to an operation by the driver;
• and
• a control section for controlling the throttle opening degree of the internal combustion engine, based on the first throttle opening degree characteristic or the second throttle opening degree characteristic and the detected accelerator pedal operation amount,
• wherein the control section changes the first throttle opening degree characteristic to the second throttle opening degree characteristic on condition that an increase in the accelerator pedal operation amount larger than the predetermined operation amount by the driver occurs within a predetermined time after the selection of the second throttle opening degree characteristic by operation of the second operating section.