The purpose of the present invention is to detect variations between the quantities of fuel injected into cylinders by fuel injection devices and correct the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor. A drive device for fuel injection devices according to the present invention performs control wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.

A method for operating an electromagnetic actuator includes an actuation event utilizing a current waveform for the actuator characterized by an initial peak pull-in current in a first direction of current flow when the actuator is commanded to an actuated position; and a reversed peak current in a second opposite direction of current flow applied after the actuator is commanded to a rest position. The reversed peak current has a magnitude that is greater than the magnitude of the initial peak pull-in current.

A fuel injection control device for an internal combustion engine which is applied to a fuel injection system of the internal combustion engine, the fuel injection system including fuel injectors, driving circuits that drive the fuel injectors in each of driving systems into which the fuel injectors are divided, and current detection circuits that are provided to the driving systems, respectively, and the current detection circuits that sense driving currents of corresponding fuel injectors. The fuel injection control device includes an acquisition unit to acquire a current change parameter that is a parameter correlative to a change quantity of a sensed current per unit time in each of the driving systems, and a current correction unit to execute a current correction in at least one of the driving systems based on the current change parameter in each of the driving systems.

A fuel injection controller includes an increase control portion applying the boost voltage to the coil to increase a coil current to a first target value, and a constant current control portion applying a voltage to the coil to hold the coil current to a second target value. A threshold is an energization time period that is necessary to reach a boundary point between a seat throttle area of a property line and an injection-port throttle area of the property line from an energization start time point. An initial-current applied time period is from the energization start time point that the boost voltage starts to be applied to the coil to a time point that the coil current is decreased to the second target value. The increase control portion controls the coil current such that the initial-current applied time period is less than the threshold.

A fuel injection pump (100) provided in a diesel engine, including: an electromagnetic spill valve (20) configured to adjust a fuel injection amount by releasing a pressurized fuel with opening/closing of a spill valve body (23); and an ECU (Engine Control Unit, 50) configured to form a current waveform of drive current of the electromagnetic spill valve (20). The ECU (50), during the warm state, detects a valve-close timing of the electromagnetic spill valve (20), forms an optimum current waveform of drive current based on the detected valve-close timing, and applies drive current with thus formed optimum current waveform to the electromagnetic spill valve (20), whereas, during the cold state, the ECU (50) applies only drive current with a pre-set current waveform to the electromagnetic spill valve (20).

A valve controller and method for controlling a valve having a solenoid are disclosed, including receiving a least one input signal, detecting a first edge of the at least one signal and in response to the detection activating the valve. Activating the valve includes activating the valve in a rise-to-peak phase during which the valve is opened, a hold phase following the rise-to-peak phase during which the valve remains open and a current level of the valve is less than a current level of the valve during the rise-to-peak phase, and an ending-of-activation phase following the hold phase during which current ripple in the valve is less than the current ripple in the valve during the hold phase.

The purpose of the present invention is to detect variations between the quantities of fuel injected into cylinders by fuel injection devices and correct the fuel injection quantity variation while minimizing the computational load on a drive device and the level of performance required of a pressure sensor. A drive device for fuel injection devices according to the present invention performs control wherein movable valves are driven so that predetermined quantities of fuel are injected by applying, for the duration of a set energization time, a current that will reach an energization current to solenoids of a plurality of fuel injection devices which open/close fuel flow paths. The drive device is characterized in that the set energization time or energization current is corrected on the basis of a pressure detection value from a pressure sensor that is attached to a fuel supply pipe disposed upstream of the plurality of fuel injection devices.

A method for simulating malfunctioning solenoid valves is disclosed. A current flows through a solenoid valve in order to achieve opening and closing. The closing is forced after the current supplied to the solenoid valve is activated at an activation time, and the opening is forced after the current is deactivated. The current is applied with a charging current strength before activation for a charging phase, and after activation, the current is increased to peak current strength and subsequently reduced to a holding current strength. The current strength is reduced to a deactivation current strength, after which the current strength increases again. A variation of the value or duration of the current strength or an application of an additional magnetic force is used to simulate a premature activation, a delayed activation, a premature deactivation, or a delayed deactivation.

A vehicle power supply apparatus includes a generator, an electrical energy accumulator, a throttle valve, a power generation controller, a throttle plate position upper limit setting unit, and a throttle valve controller. The generator is coupled to an engine of a vehicle. The electrical energy accumulator is able to be coupled to the generator. The throttle valve is provided in an intake system of the engine. The power generation controller allows the generator to perform regenerative power generation on decelerated travel of the vehicle. The throttle plate position upper limit setting unit sets an upper limit of a throttle plate position of the throttle valve on the basis of a state of the electrical energy accumulator. The throttle valve controller controls the throttle plate position within a range downward from the upper limit, during the regenerative power generation by the generator.

A target injector valve opening period is calculated based on a target fuel injection amount, and an injector (2) is controlled by a current supply control unit (51) in accordance with an injector drive period acquired based on the target injector valve opening period. An actual valve closing delay period is calculated based on a drive waveform of the injector (2) at this time, and a difference between an actual valve closing delay period and a valve closing delay period calculated from a target injector valve opening period is learned. Then, the injector drive period is corrected by feedback control using a result of this learning.