An injection control device includes a boost controller performing boost control of a boosted voltage generated by a booster circuit until a boosted voltage, which is generated in a boost capacitor, rises to a full-charge threshold when the boosted voltage falls below a charge start threshold. When a power interruption controller interrupts electric current supplied to the fuel injection valve by the drive unit, a regeneration unit regenerates electric current generated in the fuel injection valve to the boost capacitor of the booster circuit. The boost controller stops the boost control of the booster circuit when at least the electric current is regenerated by the regeneration unit to the boost capacitor of the booster circuit after the interruption control by the power interruption controller.

An injection control device includes a boost controller performing boost control of a boosted voltage until a boosted voltage, which is generated in a boost capacitor, rises to a full-charge threshold when the boosted voltage falls below a charge start threshold. A drive unit supplies electric current to a fuel injection valve from a start timing t1 of an injection instruction period. A power interruption controller interrupts electric current supplied to the fuel injection valve by the drive unit. A regeneration unit regenerates electric current generated in the fuel injection valve which is caused by interruption control by the power interruption controller to the boost capacitor of the booster circuit.

An injection control device includes a boost controller performing boost control of a boosted voltage generated by a booster circuit until a boosted voltage, which is generated in a boost capacitor, rises to a full-charge threshold when the boosted voltage falls below a charge start threshold. When, for stopping a peak current by a drive unit, a power interruption controller interrupts electric current supplied to the fuel injection valve by the drive unit as interruption control (i) of an application voltage to a fuel injection valve or (ii) of a constant current by the drive unit, a regeneration unit regenerates electric current generated in the fuel injection valve to the boost capacitor of the booster circuit. The boost controller upward-shifts (i.e., raises) the full-charge threshold of the booster circuit.

An electromagnetic valve driving device that drives an electromagnetic valve for injecting a fuel, includes: a first charging route that charges a bootstrap capacitor from a battery without intervention of a boost circuit; a second charging route that charges the bootstrap capacitor from the boost circuit; and a switching control unit that switches a charging route for charging the bootstrap capacitor to the first charging route or the second charging route.

An internal combustion engine control device that can ensure diagnosis of whether a fuel injection cut function normally works and that further permits startup of an internal combustion engine in a case in which the fuel injection cut function normally works is provided. To attain the internal combustion engine control system, the startup of the internal combustion engine is prohibited when carrying of a diagnostic monitoring current based on a diagnostic drive signal related to each of fuel injection valves to each of fuel injection valves in a case of transmitting a drive prohibition signal related to each of fuel injection valves to a fuel injection valve drive circuit before the startup of the internal combustion engine and transmitting the diagnostic drive signal related to each of fuel injection valves to the fuel injection valve drive circuit. By transmitting the diagnostic drive signal related to each of the fuel injection valves to the fuel injection valve drive circuit and monitoring whether the diagnostic monitoring current based on the diagnostic drive signal is carried to each of fuel injection valves, it is possible to ensure diagnosis of whether the fuel injection cut function normally works.

A controller causes a calculation device to perform calculation that determines an operation of a moving object and generates digital signals that define the operations of actuators. The generated digital signals are output to a digital signal transmission path by a signal bus control IC. ICs attached to the actuators obtain digital signals that define the operations of the actuators from the digital signal transmission path and generate control signals for the actuators based on the operations defined by the digital signals.

An injection control device includes a boost controller performing boost control of a boosted voltage generated by a booster circuit until a boosted voltage, which is generated in a boost capacitor, rises to a full-charge threshold when the boosted voltage falls below a charge start threshold. When a power interruption controller interrupts electric current supplied to the fuel injection valve by the drive unit, a regeneration unit regenerates electric current generated in the fuel injection valve to the boost capacitor of the booster circuit. The boost controller stops the boost control of the booster circuit when at least the electric current is regenerated by the regeneration unit to the boost capacitor of the booster circuit after the interruption control by the power interruption controller.

An injection control device includes a boost controller performing boost control of a boosted voltage generated by a booster circuit until a boosted voltage, which is generated in a boost capacitor, rises to a full-charge threshold when the boosted voltage falls below a charge start threshold. When, for stopping a peak current by a drive unit, a power interruption controller interrupts electric current supplied to the fuel injection valve by the drive unit as interruption control (i) of an application voltage to a fuel injection valve or (ii) of a constant current by the drive unit, a regeneration unit regenerates electric current generated in the fuel injection valve to the boost capacitor of the booster circuit. The boost controller upward-shifts (i.e., raises) the full-charge threshold of the booster circuit.

An injection control device includes a boost controller performing boost control of a boosted voltage until a boosted voltage, which is generated in a boost capacitor, rises to a full-charge threshold when the boosted voltage falls below a charge start threshold. A drive unit supplies electric current to a fuel injection valve from a start timing t1 of an injection instruction period. A power interruption controller interrupts electric current supplied to the fuel injection valve by the drive unit. A regeneration unit regenerates electric current generated in the fuel injection valve which is caused by interruption control by the power interruption controller to the boost capacitor of the booster circuit.

A Simulink modeling method for a mechanical hydraulic device of an aeroengine fuel regulator is proposed. The Simulink modeling method can implement high precision simulation of a mechanical hydraulic device of an engine fuel conditioning system, and greatly increase the simulation speed as compared with the existing modeling simulation in AMESim; solve the problem of a double-layered nested algebraic loop occurring when the mechanical hydraulic device is modeled in Simulink, and improve the simulation precision of the system. In addition, because of having certain universality, the resolving method for a double-layered nested algebraic loop can be generalized to resolve other types of algebraic loops. Meanwhile, the parameters of the simulation model provided by the present invention can be conveniently modified, and can provide a reference for modeling simulation of mechanical and hydraulic devices of engine fuel conditioning systems of other types.