Systems and methods for controlling turbocharger operation by maintaining a virtual turbocharger speed calculation using airflow parameters in the context of an engine. An example uses a turbocharger speed estimator, an energy observer, and an energy controller. Optimization of turbocharger speed control, including avoidance of overspeed, while reducing wastegate actuation, can be achieved using a predictive control algorithm.

A method for activating a boost pressure control for an internal combustion engine, which contains, in a through-flow direction, a compressor, a charge air line, a throttle valve, an intake manifold, at least one combustion chamber and a turbine speed-coupled to the compressor, an aperture of the throttle valve being controllable, a driving of the turbine being controllable by an exhaust gas flow, and the method including: predefining a setpoint intake manifold pressure; calculating a simplified inverse flow characteristic of the throttle valve; calculating a pseudo setpoint aperture of the throttle valve, based on the simplified inverse flow characteristic and the setpoint intake manifold pressure; and controlling the driving of the turbine, based on an exceeding of a maximum aperture of the throttle valve by the pseudo setpoint aperture of the throttle valve.

An engine control device includes a model that, based on engine operating condition and first-type operation amount, reproduces at least one index from among various indexes of combustion state of engine, and a processor that executes a process including deciding on second-type operation amount, by optimization using the model so as to treat at least one of the indexes, which are reproduced by the model, as estimated value of control amount, and ensure that the estimated value of the control amount follows control target value, associating the second-type operation amount with the control target value and the engine operating condition, rewriting a learning control table in which operation amount corresponding to the control target value and the engine operating condition is registered, and calculating operation amount according to the learning control table based on the control target value and the engine operating condition.

A method for activating a boost pressure control for an internal combustion engine, which contains, in a through-flow direction, a compressor, a charge air line, a throttle valve, an intake manifold, at least one combustion chamber and a turbine speed-coupled to the compressor, an aperture of the throttle valve being controllable, a driving of the turbine being controllable by an exhaust gas flow, and the method including: predefining a setpoint intake manifold pressure; calculating a simplified inverse flow characteristic of the throttle valve; calculating a pseudo setpoint aperture of the throttle valve, based on the simplified inverse flow characteristic and the setpoint intake manifold pressure; and controlling the driving of the turbine, based on an exceeding of a maximum aperture of the throttle valve by the pseudo setpoint aperture of the throttle valve.

The disclosure relates to internal combustion engines. The teachings thereof may be embodied in methods for controlling the actuator of the wastegate of an exhaust gas turbocharger of a motor vehicle. A method for controlling an actuator of the wastegate of an exhaust gas turbocharger of a motor vehicle may include: characterizing the wastegate in a model as a series connection of two throttle points; and actuating the wastegate based on the model.

An internal combustion engine includes an air charging system. A method to control the air charging system includes providing a desired operating target command for the air charging system, and monitoring operating parameters of the air charging system. An error between the desired operating target command for the air charging system and the corresponding one of said operating parameters of the air charging system is determined, and scheduled PID gains are determined based on the error utilizing a PID controller. An adaptive algorithm is applied to modify the scheduled PID gains, and a system control command for the air charging system is determined based upon the modified scheduled PID gains. The air charging system is controlled based upon the system control command for the air charging system.

Methods and systems are provided for increasing EGR delivered to an engine. In one example, a method may include determining an EVO timing set point and an external EGR setpoint in parallel, based on an inverse model. The EVO timing may be adjusted based on a combination of the EVO timing setpoint and an EGR cylinder balancing feedback loop, thereby varying internal EGR to the engine to supplement external EGR.

Methods and systems are provided for increasing EGR delivered to an engine. In one example, a method may include determining an EVO timing set point and an external EGR setpoint in parallel, based on an inverse model. The EVO timing may be adjusted based on a combination of the EVO timing setpoint and an EGR cylinder balancing feedback loop, thereby varying internal EGR to the engine to supplement external EGR.

To provide a control device for a vehicle capable of controlling the torque of a drive source so as to appropriately balance the suppression of body vibrations and the securing of a transient response during acceleration or deceleration. This control device for a vehicle includes an accelerator position sensor that detects the accelerator opening, a torque adjustment mechanism such as a throttle valve that adjusts the torque of an engine as the drive source of the vehicle, and a powertrain control module (PCM) that controls the torque adjustment mechanism based on the accelerator opening. The PCM sets the target acceleration of the vehicle based on the accelerator opening, sets the target torsion angle of the drive shaft based on the target acceleration, sets the target torque of the engine based on the target torsion, and controls the torque adjustment mechanism based on the target torque.

An internal combustion engine is provided. The internal combustion engine includes a control device, and at least one injector for liquid fuel. The injector(s) can be controlled by the control device via an actuator control signal. The injector(s) include an injector outlet opening for the liquid fuel which can be closed by a needle. A sensor is also provided for measuring a measurement variable of the injector(s). The sensor is or can be in a signal connection with the control device. An algorithm is stored in the control device, which algorithm calculates a state of the injector(s) based on input variables and an injector model, compares the state calculated via the injector model with a target state, and produces a state signal in accordance therewith. The state signal is characteristic of a change in the state of the injector(s) that occurs during intended use of the injector(s) and/or an unforeseen change in the state of the injector(s). The input variables include at least the actuator control signal and the measurement values of the sensor. A method for operating such an internal combustion engine and an injector is also provided.