Internal combustion engine control system

An internal combustion engine system comprising:

• an internal combustion engine having multiple cylinders;
• an intake valve which is provided in each of the cylinders;
• a first intake cam with a first cam profile;
• a second intake cam with a second cam profile different from the first cam profile, one of the first and second intake cams is selected as a drive cam for driving the intake valve;
• multiple cam carriers which are provided on a camshaft of the internal combustion engine, each of the cam carriers carries the first and second intake cams in units of cylinders or cylinder groups;
• multiple actuators which are provided corresponding to the multiple cam carriers and are configured to slide the multiple cam carriers in an axial direction of the camshaft sequentially in accordance with protrusion operation of pins, wherein the pins are configured to engage with the corresponding cam carriers and also to switch drive cams for driving the intake valve between the first and second intake cams;
• and
• an electronic control unit configured to:
• output a switch request of the drive cams to the multiple actuators when a stop request to the internal combustion engine is issued and also it is determined that the drive cams include a different profile from a predetermined profile;
• and
• output a stop request to the internal combustion engine at a predetermined timing with respect to a start of the protrusion operation of a final pin which engages with a final cam carrier and also before a start of a slide of the final cam carrier, wherein slide order of the final cam carrier in accordance with the switch request is a last of the cam carriers.