A method for identifying a set of interpolation point data points from training data for a sparse Gaussian process model, encompassing the following tasks: successively selecting training data points from the set of training data for acceptance into or exclusion from a set of interpolation point data points in accordance with a selection criterion; and terminating selection when a termination criterion exists; the selection criterion depending on a divergence between a target value of the selected training data point and a function value, at the selected training data point, of the Gaussian process model based on the respectively current set of interpolation point data points.

A control device for an internal combustion engine controls a control object device based on an output value of a relative angle sensor that detects a relative angle of an output shaft of an actuator, and an output value of an absolute angle sensor that detects an absolute angle of a drive shaft coupled to the output shaft of the actuator via a speed reducer. In this event, the control device for the internal combustion engine corrects an output value of the absolute angle sensor based on an absolute angle of the drive shaft that is obtained from an output value of the relative angle sensor using, as a reference point, an output value of the absolute angle sensor at the start-up of the internal combustion engine, and an output value of the absolute angle sensor.

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 system for controlling an engine based on piston temperature deviation includes a piston temperature estimation module that estimates a piston temperature based on engine operating conditions, a piston temperature deviation estimation module that estimates a deviation of the estimated piston temperature from a steady-state piston temperature, and an engine control module that determines an engine control parameter based upon the estimated piston temperature deviation.

A model calculation unit for calculating a gradient with respect to a certain input variable of input variables of a predefined input variable vector for an RBF model with the aid of a hard-wired processor core designed as hardware for calculating a fixedly predefined processing algorithm in coupled functional blocks, the processor core being designed to calculate the gradient with respect to the certain input variable for an RBF model as a function of one or multiple input variable(s) of the input variable vector of an input dimension, of a number of nodes, of length scales predefined for each node and each input dimension, and of parameters of the RBF function predefined for each node.

A port and direct fuel injection (PDI) fuel delivery system for a vehicle having an engine configured to selectively operate between a port fuel injection (PFI) mode, a gasoline direct injection (GDI) mode, and a PDI mode includes a PFI system including plurality of PFI injectors, and a GDI system including a plurality of GDI injectors. The PFI and GDI systems are configured to provide various split-ratios of fuel mass injection to the engine based on a particular engine operating condition. A controller is programmed to identify a known first long term fuel trim (LTFT) for a first split-ratio, identify a known second LTFT for a second split-ratio, generate a linear equation based on the known first and second LTFTs, and determine an unknown third LTFT for a third split-ratio by utilizing the linear equation to facilitate reducing fueling errors and emissions.

To provide a controller and a control method for internal combustion engine which can calculate the shaft torque in unburning with good accuracy in all the operating condition in which calculation is required, using the shaft torque in unburning which was set in the specific operating condition, and can improve estimation accuracy of the parameter relevant to the combustion state. A controller for internal combustion engine calculates a specific shaft torque in unburning with reference to a specific unburning condition data; calculates specific and current generated torques of unburning assumption using the physical model equation; calculates a current shaft torque in unburning based on the specific shaft torque in unburning, and the specific and current generated torques of unburning assumption; and calculates an increment of gas pressure torque by burning based on the current shaft torque in unburning and the actual shaft torque in burning condition.

Provided is a fuel injection control device that controls a fuel injection amount at higher accuracy. The fuel injection control device includes: a base waveform acquisition section 823 that generates a control current S9 for controlling a fuel injector 400; an A/D converter 824 that acquires a drive current P for the fuel injector 400 (controlled based on the control current S9) at each of measurement timings t1 to t6 based on a counter cycle; and an arithmetic operation section 821 that, based on a drive current P1 at a first measurement timing t1 and a drive current P2 at a second measurement timing t2 later than the first measurement timing t1, both acquired by the base waveform acquisition section 823, predicts a drive current P3 at a third measurement timing t3 later than the second measurement timing. With this configuration, the arithmetic operation section 821 makes a comparison between a predicted electric power amount calculated based on the drive current P3 at the third measurement timing t3 that the arithmetic operation section 821 has predicted and a target electric power amount calculated based on a control current predetermined, so as to correct the control current S9.

A model calculation unit for calculating a gradient with respect to a certain input variable of input variables of a predefined input variable vector for an RBF model with the aid of a hard-wired processor core designed as hardware for calculating a fixedly predefined processing algorithm in coupled functional blocks, the processor core being designed to calculate the gradient with respect to the certain input variable for an RBF model as a function of one or multiple input variable(s) of the input variable vector of an input dimension, of a number of nodes, of length scales predefined for each node and each input dimension, and of parameters of the RBF function predefined for each node.

A method for operating a combustion engine performing an injection quantity correction is described. A total injection quantity per pulse of an injector is divided into a plurality of smaller equal quantity pulses. The smaller quantity pulses are implemented in ballistic injector mode. On the basis of this step, a corresponding offset correction is carried out. After the offset correction has been applied, a further correction is carried out in linear injector mode. An additional alternative for performing an injection quantity correction without additional sensor hardware is thereby provided.