Controller for automatic transmission

A controller for an automatic transmission, the automatic transmission:

• being a stepped type automatic transmission, setting one of a plurality of shift stages by selectively causing a plurality of frictional engagement elements to engage with each other, and being able to execute a jump gear shift of jumping over two or more shift stages when a shift stage difference of two or more stages occurs between a current shift stage and a required shift stage which is required depending on a driving condition, the controller comprising:
• an electronic control unit configured to:
• (i) set a target input shaft rotation speed change rate as a control target value at a gear shift time, and
• (ii) set the target input shaft rotation speed change rate of two-step gear shift based on a difference in a synchronous rotation speed of an input shaft of the automatic transmission between before and after the two-step gear shift from a gear shift with a single intermediate shift stage as a target shift stage to a gear shift with a next shift stage after the intermediate shift stage as a target shift stage for each intermediate shift stage when a shift stage difference of three or more shift stages occurs between the current shift stage and the required shift stage and the jump gear shift via a plurality of intermediate shift stages is executed.