A fixing device includes a nip formation pad disposed opposite an inner circumferential surface of an endless belt and pressing the endless belt against a pressing rotary body to form a fixing nip between the endless belt and the pressing rotary body. It is fabricated as follows: providing a copper alloy conductor without an outer coating; forming a sheath of a PTFE-based material around the conductor; and heating the wire in order to evaporate the lubricant and sinter the sheath. The control unit controls the wake up signal to comprise a diffuse sound during a first part of the alert period and to comprise a localized sound during a subsequent part of the alert period. The total number of operations is proportional to 3M; where M is the scan length as compared to M using prior art; where n is the length of the sliding window. During the main phase in which fuel is injected into the combustion chamber of an internal combustion engine, the control valve that actuates the onoff valve is triggered once or multiple times so that the maximum pressure level occurring at the combustion chamber end of a one-part or multipart injection valve member falls below the maximum achievable pressure level.