A device that enables gasoline internal combustion engines to efficiently use fuel with higher ethanol content. The device measures various data such as ethanol content, RPM, temperature, intake air pressure, mass airflow, exhaust gas, crank sensor, among other data, to determine to an ideal enrichment pulse duration to apply to the fuel injector.

An engine includes a single cylinder, at least one sensor, a fuel injector, and a controller. The at least one sensor is configured to generate sensor data for an engine condition. The controller is configured to perform a comparison of the engine condition to a threshold and in response to the comparison, generate a first command to deactivate the fuel injector after a first predetermined time period and a second command to reactivate the fuel injector after a second predetermined time period.

Methods and systems are provided for increasing an amount of oxygen in a pre-chamber of a cylinder prior to combustion. In one example, a method may include purging residual gases from a pre-chamber to a cylinder via a pre-chamber air injection, and reducing a flow of the oxygen from the pre-chamber to the cylinder via a cylinder fuel injection directed toward an orifice fluidically connecting the pre-chamber with the cylinder. In this way, a composition of pre-chamber gases may be adjusted during a combustion cycle of a cylinder.

An increase control unit causes to apply a first voltage to a coil of a fuel injection valve to increase a driving current of the coil to a peak value. A holding control unit stops application of the first voltage, when the driving current increases to the peak value, and subsequently switches between a first holding control and a second holding control. The first holding control is to apply a second voltage lower than the first voltage to the coil based on at least one of the peak value, the second voltage, and a fuel pressure, to hold the driving current at a target current. The second holding control is to apply the first voltage to the coil to hold the driving current at the target current. The holding control unit performs one of the first holding control and the second holding control which is switched.

A method for controlling an engine of a vehicle includes: monitoring, by a controller, engine operation data including a crank position and an engine rotation speed; obtaining, by the controller, a measured air amount flowing into to a specific cylinder; calculating, by the controller, an expected air amount at an intake valve closing time based on the measured air amount; calculating, by the controller, a fuel amount based on the expected air amount; calculating, by the controller, an ignition timing based on the engine rotation speed and the expected air amount; and injecting, by the controller, the calculated fuel amount and performing ignition at the ignition timing.

A battery pack for use in providing starting power for a starter motor of an internal combustion engine and to supply power to one or more auxiliary loads. The battery pack includes an outer housing that encloses a plurality of battery cells. The battery pack further includes a control module. The control module includes a processing circuit configured to control one or more functions associated with the internal combustion engine and an interface circuit configured to interface with the internal combustion engine.

In a drive unit of a fuel injection device, an electric current is supplied to the fuel injection device by applying a high voltage to the fuel injection device from a high voltage source whose voltage is boosted to a voltage higher than a battery voltage at the time of opening a valve of the fuel injection device. Thereafter, the electric current supplied to the fuel injection device is lowered to a current value at which a valve element cannot be held in a valve open state by stopping the applying of the high voltage from the high voltage source. Thereafter, in a stage where a supply current is switched to a hold current, another high voltage is applied to the fuel injection device from the high voltage source.

A purge concentration calculation control method in an active purge system for purging a fuel evaporation gas by using a purge pump may include: calculating the purge concentration by using the RPM of the purge pump, and the pressure at a rear end of the purge pump; and controlling a purge valve in order to satisfy a target purge flow rate and the purge fuel amount by using the calculated purge concentration.

A method for model-based open-loop and closed-loop control of an internal combustion engine, in which method injection system setpoint values for activating the injection system control elements are calculated dependent on a setpoint torque by a combustion model, and gas path setpoint values for activating the gas path control elements are calculated by a gas path model. The combustion model is adapted during ongoing operation of the internal combustion engine. A quality measure is calculated by an optimizer dependent on the injection system setpoint values and the gas path setpoint values, the quality measure is minimized by the optimizer by varying the injection system setpoint values and gas path setpoint values within a prediction horizon. The injection system setpoint values and gas path setpoint values are set by the optimizer, based on the minimized quality measure, as being definitive for setting of the operating point of the internal combustion engine.

A method of controlling engine restart may include selecting, by a start controller, a first start situation and a second start situation for restarting an engine; determining a current possible start-up through the first and second start situations; prioritizing possible start-ups; and attempting to restart the engine by setting the first and second start situations as first start control and second start control, respectively, based on the priorities of the start-ups.