A fuel-injection system for internal combustion engines has at least one fuel injector injecting fuel into a combustion chamber, which is delimited by a cylinder wall in which a piston is guided. A power supply that supplies a driving power to drive a driving apparatus according to an embodiment of the present invention includes a power source to supply DC power; and a DC-DC converter to convert the DC power from the power source to a level of 1N times the driving power, and then to convert the converted DC power of 1N times to a level of the driving power. At least a part of the photosensitive member is placed between the anteroposterior ends of the intermediate transfer belt. The disk can then be copper impregnated or used as is, depending on the requirements. Each bit corresponding to a symbol in the identified pattern has a first value.