A controller for an internal combustion engine includes a detector and a processor. The detector detects a combustion condition of a gas in a cylinder of the internal combustion engine. The processor is configured to calculate a fuel ratio in the gas in the cylinder. The processor is configured to calculate a target combustion condition according to the fuel ratio. The processor is configured to calculate an ignition timing such that the combustion condition detected by the detector becomes equal to the target combustion condition.

Disclosed is a combustion system design method based on a target heat release rate, which belongs to the technical field of diesel engine combustion chamber design. The method includes: obtaining an ideal heat release rate based on Sabathe-Miller cycle; simulating the ideal heat release rate based on a double-Wiebe function and obtaining the target heat release rate; constructing a mapping relation among the heat release rate, piston geometric parameters and fuel injection parameters, which includes target start of combustion being an function of fuel injection timing and ignition delay, premixed combustion parameters being functions of throat radius, injection pressure and nozzle diameter, and diffusion combustion being a function of piston pit depth; solving target piston geometric parameters and target fuel injection parameters based on the mapping relation; and then designing a combustion system. The method does not depend on experience and multi-scheme design, greatly shortens the combustion system design.

A method of generating vehicle control data includes: storing, with a storage device, relationship prescription data; operating, with an execution device, an operable portion of an internal combustion engine; acquiring, with the execution device, a detection value from a sensor that detects the state of the vehicle; calculating, with the execution device, a reward; and updating, with the execution device, the relationship prescription data using update mapping determined in advance, the update mapping using the state of the vehicle based on the detection value, an operation amount used to operate the operable portion, and the reward corresponding to the operation as arguments, and returning the relationship prescription data which have been updated such that an expected profit for the reward calculated when the operable portion is operated in accordance with the relationship prescription data increases.

A method and system for controlling an EGR valve for a vehicle may include an adjusting step of reducing the amount of air flowing into an engine at operation points of the engine lower than a predetermined value at each of the operation points by a controller; a learning step of maintaining, as a reduction-learning amount, a reduction amount of the amount of air from the predetermined value before a malfunction occurs, by the controller, when a malfunction occurs in the engine due to the reduction in the amount of air; a compensating step of determining a compensating air amount at each of the operation points by applying the reduction amount to the predetermined value by the controller; and an EGR controlling step of controlling an EGR-opening amount to satisfy the compensating air amount for a current operation time after the compensating step.

An internal combustion engine 2 is started by being cranked by an electric motor. An internal combustion engine start control device performs a feedback-control of an intake air amount of the internal combustion engine to a target idle intake air amount, learns a feedback correction amount applied in a feedback control, and performs a learning control using a learnt value in parallel with the feedback control. An engine rotation speed is converged to a target idle rotation speed in an early stage by setting an allowable correction range of a feedback correction amount applied before a start of learning of the intake air amount wider than the allowable correction range of the feedback correction amount applied after the start of the learning of the intake air amount.

A control device serving as a torque estimation device includes a storage device and a processing circuit. The storage device stores data of a trained neural network. The trained neural network is trained using training data including data of an actually-measured torque that is measured, data of an accelerator operation amount in a period of a predetermined length up to a time point of measurement of the actually-measured torque, and data of an acceleration of a vehicle from the time point of measurement of the actually-measured torque onward. The processing circuit inputs, to the trained neural network stored in the storage device, input data including the data of the accelerator operation amount and the data of the acceleration of the vehicle, to estimate a torque generated in a power transmission member.

Disclosed is a method for acquiring an altitude correction coefficient, comprising: acquiring an initial value of an altitude correction coefficient self-learning filter when a preset event occurs to a vehicle engine, the preset event includes a power-off event, a power-on event, and an unexpected power-down event; evaluating whether the vehicle satisfies a preset self-learning enabling condition, in accordance with an engine rotation speed, a vehicle speed, and status information of designated devices; enabling the altitude correction coefficient self-learning filter when the vehicle satisfies the preset self-learning enabling condition; determining an input of the altitude correction coefficient self-learning filter at least in accordance with operating states of a manifold pressure sensor and a stepping motor; and obtaining a current altitude correction coefficient by self-learning the altitude correction coefficient applying the altitude correction coefficient self-learning filter in accordance with the initial value of the altitude correction coefficient self-learning filter and the input of the altitude correction coefficient self-learning filter. An apparatus for acquiring an altitude correction coefficient is also disclosed. The above method and apparatus improve the accuracy of the altitude correction coefficient and enhance the idling satiability.

An illustrative example method of controlling an engine of a vehicle, includes determining a target pressure curve for a cylinder of the engine for a first combustion cycle, determining a heat release model for the cylinder for the first combustion cycle, determining a mass flow of fuel from the heat release model to achieve the target pressure curve during the first combustion cycle, and automatically controlling opening of an injector of the cylinder of the engine during the first combustion cycle to provide the determined mass flow of fuel to the cylinder. The method includes determining a real pressure curve during the first combustion cycle and automatically adjusting at least one of the heat release model or the mass flow for a second, subsequent combustion cycle based on a difference between the target pressure curve and the real pressure curve.

A control device of an engine includes an adjustment mechanism and a controller. The adjustment mechanism is configured to adjust an intake air amount. The controller is configured to save a first learning value in a volatile storage medium, the first learning value being obtained by learning an operation amount of the adjustment mechanism when the engine is idle. The controller is configured to control the adjustment mechanism according to the first learning value. The controller is configured to save a second learning value in a non-volatile storage medium, the second learning value being equal to the first learning value. The controller is configured to correct the first learning value using the second learning value after the first learning value is cleared.

Values of at least one energy utilization characteristic, which represents a first energy utilization process in a first vehicle, are determined. Furthermore, values of at least one parameter, which represents at least one boundary condition of the energy utilization in the first vehicle during the first energy utilization process, are also determined. A mathematical relationship between at least one or more values provided for the at least one energy utilization characteristic and the corresponding values of the parameters is determined and a profile record comprising a record and/or learning data is provided on the basis of at least one mathematical relationship determined. Depending on the profile record, at least one operating parameter of the drive system of the first vehicle and/or of a second vehicle is adapted in a second energy utilization process.