Controller for vehicle

A controller for a vehicle, the vehicle comprising:

• an internal combustion engine;
• a motor generator,
• a drive sprocket fixed to a crankshaft of the internal combustion engine;
• an idler sprocket to which a driving force is transmitted from the drive sprocket;
• a chain running around the drive sprocket and the idler sprocket;
• a swing guide supported in a swingable manner;
• a chain tensioner that pushes the swing guide against the chain;
• and
• an oil pump that discharges oil when the crankshaft rotates, wherein
• the controller is configured to control a traveling mode of the vehicle in a Battery Electric Vehicle mode that stops the internal combustion engine and drives the motor generator when the vehicle travels or a non-BEV mode that drives the internal combustion engine when the vehicle travels,
• the chain tensioner has an oil damper functionality that uses oil supplied from the oil pump, and
• when shifting the traveling mode of the vehicle from the BEV mode to the non-BEV mode, the controller is configured to execute a high-pressure process for calculating a supply pressure of oil supplied to the chain tensioner that is higher when a duration of the BEV mode is greater than or equal to a specified time than when the BEV mode duration is less than the specified time.