Various embodiments relating to controlling a fuel injection quantity of a fuel injector are provided. In one embodiment, a fuel injector for an internal combustion engine includes a fuel supply channel, a nozzle valve including a valve stem, and an actuator to actuate the nozzle valve. The nozzle valve and an inner wall of the fuel supply channel form a first flow cross section and at least one second flow cross section that is greater than the first flow cross section.

A system according to the present disclosure includes an engine parameter estimation module, an error magnitude module, an engine parameter adjustment module, and an engine actuator control module. The engine parameter estimation module estimates an engine operating parameter using a physics-based model. The error magnitude module determines a magnitude of error between the estimated engine operating parameter and an actual value of the engine operating parameter using an experimental model. The engine parameter adjustment module adjusts the estimated engine operating parameter based on the error magnitude. The engine actuator control module controls an actuator of the engine based on the estimated engine operating parameter as adjusted.

A method and system improving vehicle operation is presented. In one example, the vehicle data is transmitted between a vehicle and a cloud computer. The cloud computer adjusts engine control parameters and the vehicle is operated based on the adjusted engine control parameters.

A vehicle is disclosed which includes: an engine; a catalyst purifying exhaust gas of the engine; a grille shutter adjusting an opening area of a radiator grille; and an electronic control unit configured to: (a) control an injection quantity of fuel to be supplied to the engine, (b) detect a malfunction of the grille shutter in a state where the grille shutter is closed, and (c) increase the injection quantity when the malfunction is detected in comparison to when the malfunction is not detected.

To prevent generation of noise due to a misfire when a rotation speed is increased to an operational rotation speed immediately after low-temperature start, or is increased from an idling rotation speed in a low-temperature state to the operational rotation speed, an embodiment includes a fuel injection device capable of performing multi-stage injection of fuel accumulated in a common rail through an injector, a cooling water temperature sensor as a water temperature detection unit configured to detect a cooling water temperature of an engine, an exhaust temperature sensor as an exhaust temperature detection unit configured to detect the exhaust temperature of the engine, and an engine control unit as a control device. The control device executes a misfire avoiding mode in which the multi-stage injection is continued when the cooling water temperature is not lower than a predetermined water temperature T at start of the engine.

A data analyzer for analyzing characterization data to form fuel injection control, including a data obtainer that obtains data from a detection signal of a sensor as a time-series data that changes over time. The data analyzer further includes a differentiator that differentiates the time-series data obtained by the data obtainer, a moving averager that calculates a moving average of the differentiated time-series data by the differentiator, an identifier that identifies a waveform of the time-series data based on the moving average calculated by the moving averager, and a data characterizer characterizes the time-series data based on the waveform of the time-series data identified by the identifier. As such, noise is removed as much as possible, and characteristics of time-series data become analyzable.

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.

An oxygen storage state of a catalyst is estimated based on an output of an air-fuel ratio sensor, and the oxygen storage state of the catalyst is controlled, such that the oxygen storage state of the catalyst reaches a neutral state, based on an estimation value of the oxygen storage state. In addition, the estimation value of the oxygen storage state is corrected based on the estimation value of the oxygen storage state and an output of an oxygen sensor such that deterioration of accuracy of the oxygen storage state estimation is restricted. Furthermore, a constant current is caused to flow in a direction in which rich detection by the oxygen sensor is expedited in a case of transition of the output of the oxygen sensor to a lean side. The constant current is caused to flow in a direction in which lean detection by the oxygen sensor is expedited in a case of transition of the output of the oxygen sensor to a rich side. Accordingly, an air-fuel ratio change in the catalyst and a change in actual oxygen storage state of the catalyst can be detected early based on the output of the oxygen sensor, and the deterioration of the accuracy of the oxygen storage state estimation can be detected early.

Disclosed is a controller for a turbocharged engine. The engine includes a supercharger configured to supercharge intake air using an exhaust gas from the engine, and including movable flaps arranged so that a boost pressure generated in an intake passage is adjustable. If a rotational speed of a turbine and compressor that constitute the supercharger has reached a first threshold lower than an endurance limit, an amount of fuel injected to the engine is reduced to a predetermined amount. If the rotational speed has reached a second threshold lower than the first threshold, the amount of fuel injected is reduced in accordance with an excess of the rotational speed over the second threshold.

Methods and systems are provided for mitigating the effects of a leaky fuel injector during vehicle idle stop conditions. In one example, a method may include identifying the cylinder with a leaky fuel injector, and at or during engine shutdown, positioning the engine to a selected position based on the identified cylinder such that an exhaust valve of the identified cylinder is at least partly open.