A method of controlling launch of a vehicle, may include setting step in which a controller sets a basic target engine speed; a transient control step in which the controller controls a clutch torque based on the basic target engine speed; a transient state determining step in which the controller determines, whether a transition period of change of the engine speed elapsed; a first correction amount determination step in which the controller determines a correction amount; a correction applying step in which the controller adds the correction amount to the predetermined target engine speed and then determines a final target engine speed; an error determination step in which the controller determines the engine speed control error; and a feedback determination step in which the controller uses the engine speed control error and determines a feedback control amount for feedback-controlling a clutch actuator.

The present disclosure provides a shifting control method for hybrid vehicles to reduce the occurrence of a clutch releasing phenomenon due to an excessive change in input torque of a transmission during shifting of the vehicle, including: an entering step of performing, by a controller, a control to enter a torque hand over control in response to power off down shifting; and a rising control step of controlling, by the controller, an engagement side clutch torque to rise to correspond to a changed input torque of a transmission when a change rate in input torque of the transmission is equal to or more than a reference value during the torque hand over process.

The present invention relates to a control system for compensating for variable inertia in a vehicle powertrain, the method comprising: determining (404) whether a torque source (202) is coupled to a wheel (FL, FR), and applying (408, 410) a torque change in dependence on angular acceleration associated with the torque source (202), in dependence on whether the torque source is coupled to the wheel. The present invention further relates to a corresponding method, vehicle, system and computer software.

Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: identify a vehicle acceleration; estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed and the average torque output by the engine are constant, to set the countertorque such that, as the absolute value of the vehicle acceleration becomes smaller, the absolute value of the countertorque becomes larger.

An engine clutch control apparatus of a hybrid vehicle is provided. The apparatus includes an engine clutch that is disposed between an engine and a drive motor to selectively connect the engine and the drive motor and an integrated starter-generator that is connected with the engine to start the engine or to generate electricity. A vehicle controller releases or couples the engine clutch to implement a driving mode and determines a chargeable torque and an engine target estimation torque based on a generator rotation speed of the integrated starter-generator. An engine target torque and a charge torque are set based on the chargeable torque and a clutch input torque is generated using at least one of the engine target torque, an engine friction torque, and the charge torque. The engine clutch is then released when the clutch input torque is less than a reference value.

Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed is constant, to set the countertorque such that, as the average torque output by the engine becomes larger, the absolute value of the countertorque becomes larger.

A method controls an internal combustion engine having a drive output shaft that is coupled to an input shaft of a transmission. The internal combustion engine and the transmission are encompassed by a drivetrain for the drive of a motor vehicle. The method includes determining a rotational speed of the drive output shaft of the internal combustion engine and determining a rotational acceleration of the drive output shaft based on the rotational speed of the drive output shaft. A dynamic torque of the internal combustion engine is determined as a product of the rotational acceleration and a dynamic moment of inertia of the internal combustion engine. A maximum combustion torque of the internal combustion engine is determined from a sum of a predetermined maximum torque at the input shaft of the transmission and the dynamic load torque of the internal combustion engine.

The invention relates to an output controller for an engine control for an engine system comprising an internal combustion engine and in electric generator coupled to the internal combustion engine; a computer device which is designed to receive a mechanical target output for the engine system and a maximally permissible rotational speed for the generator and to calculate a target rotational speed for the electric generator and an output torque for the internal combustion engine on the basis of the target output and the maximally permissible rotational speed; an inertia compensating device which is designed to calculate a torque transmitted to a shaft of the generator by a mass moment of inertia of the internal combustion engine on the basis of a change of the target rotational speed for the electric generator and to calculate a target torque for the internal combustion engine on the basis of the transmitted torque and the calculated output torque of the internal combustion engine; and an efficiency calculating device which is designed to calculate a degree of efficiency of the engine system on the basis of the target rotational speed for the electric generator, the calculated output torque of the internal combustion engine, a battery voltage and a generator current of a battery of the engine system, and the calculated target torque for the internal combustion engine and to adapt the value for the mechanical target output, which is supplied to the first computer device, on the basis of the calculated degree of efficiency. The invention further relates to an engine controller and to an engine system.

The invention relates to a method for controlling a drivetrain having an internal combustion engine controlled dependent on a load demand on a target engine torque and having a dual-clutch transmission with two sub-transmissions, each having a friction clutch positioned operatively between the internal combustion engine and a sub-transmission with a changing maximum transferable clutch torque, wherein a specified clutch torque is set along an actuation travel path by means of a clutch actuator, a clutch characteristic of the transferable clutch torque is continuously adapted over the actuation travel path, and a maximum engine torque for a sub-transmission, which is reduced in comparison to the target engine torque, is limited to the maximum clutch torque transferable by means of the friction clutch of that sub-transmission.

A method for operating a hybrid drive device, which includes a first drive unit and a second drive unit is disclosed, wherein a drive torque of the hybrid drive device is produced only by means of the first drive unit in a first operating mode and is produced jointly by the first drive unit and the second drive unit in a second operating mode, and wherein an actual rotational speed of the second drive unit is brought into line with a target rotational speed upon a switchover from the first operating mode to the second operating mode. In order to bring the actual rotational speed into line, a target rotational speed gradient is determined and a target torque determined on the basis of the target rotational speed gradient is set at the second drive unit.