PUMP MODULE AND EVAPORATED FUEL TREATMENT DEVICE

A pump module disclosed herein is mounted in an evaporated fuel processing device configured to perform a purge process in which evaporated fuel in a fuel tank is supplied to an intake passage of an engine through a purge passage. The pump module may include: a pump configured to pump the evaporated fuel in the purge passage to the intake passage; and a pump controller configured to control drive of the pump. The pump controller may be configured to: during the purge process, drive the pump at a rotational speed equal to or lower than a rotational speed threshold until when a predetermined period has elapsed from a start of the purge process; and after the predetermined period has elapsed, drive the pump at a rotational speed equal to or higher than the rotational speed threshold.