Patent ID: 7957887

Claim:
A controller for controlling a throttle opening degree of an internal combustion engine, the controller being capable of switching a combustion mode of the internal combustion engine from compressed self-ignition type combustion to spark ignition type combustion, wherein within a predetermined period of applying a fuel mode switching control to change from the compressed self-ignition type combustion to the spark ignition type combustion, said controller decreases the throttle opening degree of the internal combustion engine from a throttle opening degree for the compressed self-ignition type combustion below a throttle opening degree subsequently set by the controller when the compressed self-ignition type combustion has switched to the spark ignition type combustion, and then increases said throttle opening degree of said internal combustion engine to said throttle opening degree of said internal combustion engine to said throttle opening degree subsequently set by the controller after the predetermined time has passed for said spark ignition type combustion.