Methods and systems are provided for an engine for adjusting cylinder parameter settings to optimize engine output during a transient mode. In one example, a method may include adjusting cylinder parameter settings, including a cam timing setting, a spark timing setting, and a fuel injection timing setting based on a chamber temperature in response to a rate of fuel injection acceleration being greater than a positive threshold, thus indicating the engine is in the transient mode.

An air-assisted jet flame ignition device includes a housing, a fuel-air premixing unit, and a prechamber. The fuel-air premixing unit includes a fuel injector, an air injection valve, a premixing sleeve, a premixing sleeve inner core placed in the premixing sleeve, and a fuel injector fastening bolt. An inner wall surface of the premixing sleeve and an outer wall surface of the premixing sleeve inner core form a premixing sleeve inner cavity. An inner wall surface of the premixing sleeve inner core, a lower end surface of a nozzle of the fuel injector, and an upper end surface of an air inlet of the air injection valve form a premixing cavity. The premixing cavity coupled to the premixing sleeve inner cavity via a through hole on the sidewall of the premixing sleeve inner core. A prechamber nozzle is fixedly coupled to the lower part of the housing.

Systems and methods for controlling a gasoline urea selective catalytic reductant catalyst are described. In one example, an observer is provided that corrects an estimate of an amount of NH.sub.3 that is stored in a SCR. The amount of NH.sub.3 that is stored in the SCR is a basis for generating additional NH.sub.3 or ceasing generation of NH.sub.3.

A method for operating an internal combustion engine of a motor vehicle, where the internal combustion engine includes a combustion chamber and a prechamber spark plug which is assigned to the combustion chamber and which has a prechamber which is fluidically connected to the combustion chamber via a plurality of openings. The method includes operating the internal combustion engine in a catalytic converter heating operation in which an ignition time, at which an ignition spark for igniting a fuel-air mixture in the combustion chamber is generated in the prechamber within a particular operating cycle of the internal combustion engine, is shifted later compared to a normal operation. An injection time, at which a last direct fuel injection into the combustion chamber is carried out within the particular operating cycle, is a same in the catalytic converter heating operation and in the normal operation.

Systems and methods for operating an internal combustion engine that is included in a hybrid vehicle are described. In one example, the internal combustion engine is operated in a two stroke mode during cold starting to increase mass flow to an electrically heated catalyst so that engine emissions may be reduced.

Provided is an internal combustion engine control device capable of reducing a control error of the ignition timing as compared with the conventional technique. The internal combustion engine control device of the present disclosure includes a neural network model that receives three or more variables including at least a rotation speed, a load, and another specific variable of an internal combustion engine as inputs and outputs a control amount of the internal combustion engine. The neural network model includes a first neural network model having a reference value of the specific variable as an input and a second neural network model having a current value of the specific variable as an input. The internal combustion engine control device of the present disclosure corrects a reference value of the control amount calculated based on the rotation speed and the load using a difference or a ratio between the output of the first neural network model and the output of the second neural network model as a correction amount.

The invention relates to a method for operating an internal combustion engine comprising: determining a first set point value of a volume of air to be taken into the combustion chamber of the internal combustion engine within one working cycle thereof by retrieving the first set point value from a first characteristic map stored in a memory device of an electronic computing device as a function of a current engine speed of the internal combustion engine and as a function of a torque to be provided by the internal combustion engine; and determining a second set point value by retrieving the second set point value from a second characteristic map stored in the memory device of the electronic computing device as a function of a current engine speed of the internal combustion engine and as a function of a current volume of air supplied to the combustion chamber.

A method for accelerating a vehicle from rest, including controlling an engine according to a first control strategy; receiving a mode indication selecting a launch control mode for accelerating; controlling the engine according to a second control strategy; in response to greater than zero accelerator position, controlling to increase throttle valve opening and engine control operational conditions to limit engine torque output; while in the second control strategy, receiving an indication to end control by the second control strategy; and in response to indication, controlling according to the first control strategy causing the vehicle to accelerate from rest, the first acceleration rate greater than the second rate corresponding to accelerating from rest after sequentially controlling according to the first and second control strategies; the second acceleration rate corresponding to accelerating from rest by controlling according to the first control strategy without previously controlling according to the second control strategy.

A controller of an engine with a supercharger includes, for each of cylinders, fuel supply system and an ignition plug. The controller includes an electronic control unit that is configured to: (i) set a basic ignition timing depending on an operation state of the engine, (ii) detect, for each cycle, an abnormal combustion generation cylinder in which an abnormal combustion is generated in a supercharged region, (iii) execute a fuel cut to stop a fuel supply by the fuel supply system for the abnormal combustion generation cylinder, (iv) change an ignition timing of the abnormal combustion generation cylinder to expand a crank angle width between a compression top dead center and the basic ignition timing for several cycles after start of the fuel cut, and (v) execute an ignition cut that prohibits a spark from being generated by the ignition plug, further after elapse of the several cycles is executed.

An engine system is provided, which includes a cylinder block, a cylinder head, a piston, a main combustion chamber, a subchamber, an injector that injects fuel into the main combustion chamber, a main spark plug that ignites a mixture gas inside the main combustion chamber, a subspark plug that ignites the mixture gas inside the subchamber, and a control device. In a low-speed high-load range, a fuel injection timing is set in compression stroke and the main ignition and the subignition are performed after the fuel injection timing, and the fuel injection timing under a low-speed condition becomes later than that under a high-speed condition, and the ignition devices are controlled so that the subignition timing is retarded from the main ignition timing and an ignition phase difference that is the retard amount of the subignition timing becomes larger under the low-speed condition than under the high-speed condition.