A fuel injection controller includes a discharge switch that turns ON/OFF energization of a first energization path from a boost power source of a second booster circuit when a second control IC energizes a second solenoid, a first detection element that detects a value that depends on an energization state of the discharge switch, a constant current switch that turns ON/OFF energization of a second energization path from a power source voltage that outputs a lower voltage than a boost power source voltage when the second control IC energizes the second solenoid, a second element that detects a value that depends on an energization state of the constant current switch, and an energization path controller that switches energization to the second solenoid.

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 fluidic subsystem disposed on a vehicle includes an electric motor, a motor driver, and a fluidic pump that is disposed in a fluidic circuit that is monitored by a pressure sensor. A controller includes an instruction set that is executable to dynamically observe operation of the fluidic subsystem, from which it determines a plurality of observed parameters associated with the operation of the fluidic subsystem and a plurality of estimated parameters associated with the fluidic subsystem. A plurality of fault isolation parameters are determined based upon the observed parameters and the estimated parameters, and a fault in the fluidic subsystem is isolated based upon the fault isolation parameters. The isolated fault is communicated via the controller.

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.

Disclosed is a method for adapting a control signal of a control circuit for at least one injector of a combustion engine of a motor vehicle, the control signal being a voltage-pulse signal of variable frequency varying between a minimum frequency and a maximum frequency and which is characterized over a given period by its duty cycle. For a given period of the control signal, the method includes determining the start time of the given period and of detecting the first pulse in the given period from the start time and, when the duration of the detected first pulse is included in a minimum time interval beginning at the start of the given period and the duration of which is dependent on the maximum frequency, modifying the duration of the detected first pulse so that the duration becomes equal to the duration of the minimum time interval.

Methods and systems for controlling a pneumatic starter air valve of a gas turbine engine are described herein. The starter air valve is controlled in a first mode of operation by actuating a first solenoid of the starter air valve with a steady-state input signal. Passage of the steady-state input signal to a second solenoid of the starter air valve is allowed, to actuate the second solenoid and enable pressure regulation of the starter air valve. The starter air valve is controlled in a second mode of operation by actuating the first solenoid with a pulse-width modulation input signal. Passage of the pulse-width modulation input signal to the second solenoid is prevented, to disable the pressure regulation in the second mode of operation.

Methods and systems for controlling a pneumatic starter air valve of a gas turbine engine are described herein. The starter air valve is controlled in a first mode of operation by actuating a first solenoid of the starter air valve with a steady-state input signal. Passage of the steady-state input signal to a second solenoid of the starter air valve is allowed, to actuate the second solenoid and enable pressure regulation of the starter air valve. The starter air valve is controlled in a second mode of operation by actuating the first solenoid with a pulse-width modulation input signal. Passage of the pulse-width modulation input signal to the second solenoid is prevented, to disable the pressure regulation in the second mode of operation.

A system and method for controlling operation of an internal combustion engine having at least one fuel injector. A controller is configured to selectively command the at least one fuel injector to deliver a primary fuel injection of a first fuel quantity and a secondary fuel injection of a second fuel quantity. The first fuel quantity is above a predefined threshold and the second fuel quantity is at or below the predefined threshold. The controller is configured to command a primary pulse width and a secondary pulse width, based in part on a respective desired fuel injection mass and respective initialized values of fuel injector slope. Operation of the fuel injectors is controlled based in part on a converged primary fuel injector slope and a converged secondary fuel injector slope determined at partially from a comparison of a calculated fuel mass and an estimated fuel mass.

A water injection system for spraying water toward an intake system of an engine is disclosed. The water injection system includes a water collection circuit that has a water collection pipe for collecting water from the intake system and a drain valve installed on the water collection pipe. The water collection circuit collects water from the intake system of the engine by opening the drain valve when amount of stagnant water in the intake system reaches a predetermined threshold.

Compensator circuitry is provided for an oxygen sensor which includes a pump cell and a reference cell. The compensator circuitry includes a feedback control loop which maintains the reference cell at a reference voltage. The feedback control loop includes a digital compensator which determines and outputs a compensation current to the pump cell dependent on a reference voltage measured from the reference cell. The digital compensator also suspends the determination and output of the compensation current for a set time which is dependent on detection of edges in an oxygen sensor heater Pulse Width Modulation signal.