Meshing engagement device and controller

A controller for controlling a meshing engagement device, the meshing engagement device including:

• a movable member configured to move in the axial direction by power from an actuator;
• a first engaging element connected to the movable member, and configured to move in the axial direction by a thrust force given from the movable member;
• a spring member interposed between the movable member and the first engaging element, and configured to transmit the thrust force of the movable member to the first engaging element;
• first engaging teeth formed on the first engaging element;
• and
• a second engaging element disposed at a position which opposedly faces the first engaging element in the axial direction, the second engaging element having second engaging teeth which mesh with the first engaging teeth, wherein
• the meshing engagement device is configured to switch a state of engagement in response to a position of the movable member in the axial direction between an engagement state where the first engaging teeth and the second engaging teeth mesh with each other so that the first engaging element and the second engaging element are integrally rotatable and a disengagement state where the first engaging teeth and the second engaging teeth do not mesh with each other so that the first engaging element and the second engaging element are rotatable relative to each other, wherein
• the controller comprises an engagement control unit configured to execute engagement control for switching the meshing engagement device from the disengagement state to the engagement state,
• the engagement control unit configured to execute first engagement control for controlling the engagement state to a first engagement state, where the first engaging teeth and the second engaging teeth mesh with each other so that the first engaging element and the second engaging element are integrally rotatable, which is a state where the spring member is contracted in the axial direction, and configured to execute second engagement control for controlling the engagement state to a second engagement state, where the first engaging teeth and the second engaging teeth mesh with each other so that the first engaging element and the second engaging element are integrally rotatable, which is a state where the spring member is further contracted in the axial direction compared to the spring member in the first engagement state after the first engagement control is executed.