Abstract: A color adjustment apparatus includes a processor configured to: acquire desired color measurement value information about a target display by inputting a medium color measurement value of a target printing medium and spectral distribution characteristics of a specific color on the target display to a color measurement value calculation model that has been trained, using learning data including a combination of a medium color measurement value obtained by measuring a specific color on a printing medium, display color measurement value information indicating a display color measurement value obtained by measuring the specific color on a display that has been adjusted to be displayed as a color equivalent to the specific color on the printing medium, and spectral distribution characteristics of the specific color on the display before the adjustment is performed, based on the medium color measurement value of the printing medium and the spectral distribution characteristics of the display, to output the desired

Abstract: A fuel injection system includes a booster for intensifying a supply of fuel from a fuel reservoir and a nozzle needle actuator for operating a fuel injector to start and terminate a fuel injection from the latter. The boosted fuel from the booster is fed not only to the fuel injector but to an upper chamber of the nozzle needle actuator which is defined by a piston. A first hydraulic circuit produces a variable hydraulic fluid pressure for operating the booster in accordance with a predetermined engine operating parameter. A lower chamber also defined by the piston in the nozzle needle actuator is selectively communicated to the first hydraulic circuit by a second hydraulic circuit. The first and second hydraulic circuits share a common source of hydraulic fluid supply which is independent of the fuel reservoir.

Abstract: A fuel injection system has a fuel supply line which extends from a fuel reservoir to a fuel injector through a booster and is hydraulically isolated from a hydraulic circuit for operating the booster and a hydraulic circuit for operating a nozzle needle actuator, which is operatively associated with the fuel injector to control fuel injection. The two hydraulic circuits share a common source of hydraulic fluid supply which is independent of the fuel reservoir and adapted to actuate general hydraulic units. An electronically operated pressure control valve is controlled by a control unit to drive the booster with a hydraulic fluid pressure which varies in proportion to a varying engine load, i.e. full load, partial load and no load.