Transmission control device

A transmission control device configured to control a first prime mover and a second prime mover of which output responsiveness to an output change command is different from each other in a system, the system including the first prime mover, the second prime mover, and a gear transmission, the gear transmission including an input shaft to which a driving force of the first prime mover and a driving force of the second prime mover are transmitted, an output shaft, a plurality of transmission gears, and a dog configured to move to the input shaft and the output shaft to be engaged selectively with one of the plurality of transmission gears, the control device comprising:

• a processing circuitry, wherein
• the transmission control device causes the processing circuitry to execute a process, the process including:
• in response to a shift command for shifting from a first transmission gear position to a second transmission gear position, calculating a target rotational speed of the first prime mover and a target rotational speed of the second prime mover for a synchronous control that brings one of a rotational speed of the dog at the second transmission gear position and a rotational speed of the transmission gear at the second transmission gear position close to the other;
• and
• determining a first timing or a second timing such that the second timing is later than the first timing, the first timing being a time at which the synchronous control of the first prime mover is started, and the second timing being a time at which the synchronous control of the second prime mover is started.