A system and a method are configured to control a traction force of a vehicle, for example, an electrified vehicle. The system includes wheel speed sensors mounted on drive wheels, respectively, of the vehicle to measure a drive wheel speed, a disturbance observer for extracting a primary disturbance by comparing an actual vehicle behavior based on a required torque with a vehicle behavior estimated based on the drive wheel speed using a vehicle behavior model in an acceleration situation of the vehicle, a filter for extracting a secondary disturbance in a preset frequency range from the primary disturbance, a compensator for calculating a compensation torque for cancelling the secondary disturbance, a hysteresis circuit for determining whether to compensate for the required torque based on the compensation torque, and a calculator for calculating a compensated required torque using the required torque and the compensation torque.

An engine ECU includes a traveling control unit configured to bring a clutch device into a disconnection state to perform inertial traveling of a vehicle according to satisfaction of predetermined inertial traveling implementation conditions and configured to bring the clutch device into a connection state to cancel an inertial traveling state and perform regenerative power generation according to satisfaction of predetermined regenerative power generation implementation conditions during the inertial traveling, and a required power calculation unit configured to calculate required power of the vehicle; and the traveling control unit selectively performs the inertial traveling or the regenerative power generation an ISG based on the required power calculated in a state in which the inertial traveling implementation conditions are satisfied.

The disclosure relates to a method for controlling an internal combustion engine. The internal combustion engine includes a cylinder and a piston, which runs in the cylinder, together delimiting a working chamber. The working chamber is supplied with fresh air from an intake section via an inlet valve and is connected to an exhaust manifold via exhaust valves. The internal combustion engine includes a variable valve actuation system for the actuation of the inlet valves, controlling the opening time and/or the closing time and/or the lift. A strategy for shutting down the internal combustion engine includes controlling the inlet valves of individual or all working chambers in such a way that the transfer of fresh air from the intake section to the exhaust manifold is reduced or avoided and that the drag torque of the intake combustion engine is reduced.

A vehicle control device for a vehicle provides a predetermined control based on the rotational characteristic, the vehicle including a rotation lock mechanism preventing rotation of a coupling portion of the rotating member coupled to the engine on the engine side of the rotating member in at least one direction, the vehicle control device comprising: a characteristic detecting portion detecting the rotational characteristic by applying a torque to the rotating member from the electric motor to measure a twist angle of the rotating member while the rotation of the coupling portion is prevented by the rotation lock mechanism; and a characteristic correspondence control portion setting a control value related to an engine rotation speed based on the rotational characteristic detected by the characteristic detecting portion to provide the predetermined control by using the control value.

A power train device of a vehicle includes an engine and an automatic transmission. The automatic transmission is configured such that in a neutral state, multiple ones of multiple rotary elements forming a power transmission path other than a rotary element coupled to an input member and a rotary element coupled to an output member are in a non-restraining state. The multiple ones of the multiple rotary elements include a rotary element of a predetermined brake among multiple friction fastening elements, and the predetermined brake is fastened before a fuel supply upon an engine start.

A method for operating a vehicle that includes a DC/DC converter is described. In one example, the method includes adjusting an output voltage of the DC/DC converter after the DC/DC converter is used to crank an engine. The output voltage of the DC/DC converter may be adjusted responsive to a state of charge of an ultra-capacitor.

A hybrid power system includes a CVT, an internal combustion engine, an electric motor, a clutch, and a synchronization apparatus. The CVT has a CVT input shaft and a CVT output shaft. The internal combustion engine has an internal combustion engine output shaft and the electric motor has an electric motor shaft. The clutch is provided between the internal combustion engine and the CVT. The synchronization apparatus is provided between the internal combustion engine and the electric motor. The clutch and the synchronization apparatus can be adjusted to connect the internal combustion engine output shaft to the electric motor shaft via the CVT, and connect the internal combustion engine output shaft to the electric motor shaft without the CVT. In an example embodiment, the synchronization apparatus includes a first synchronizer between the internal combustion engine and the CVT, and a second synchronizer between the CVT and the electric motor.

A motor vehicle drive apparatus includes a device configured to connect an internal combustion engine to an electromechanical energy converter, and first and second drive trains. The second drivetrain is arranged parallel to the first drivetrain in relation to torque transmission between the electromechanical energy converter and the internal combustion engine. The first drivetrain has a one-way clutch which is set up in such a manner that torque is transmittable via the first drivetrain from the electromechanical energy converter to the internal combustion engine during starting of the internal combustion engine. The second drivetrain has a speed-sensitive clutch which in a first state is open until a first speed threshold is reached, so that in the first state no torque is transmittable with the second drivetrain from the internal combustion engine to the electromechanical energy converter. The speed-sensitive clutch is closed from the crossing of this first speed threshold.

A controller and a method for a hybrid drive, which includes an internal combustion engine and an electrical machine are provided. The internal combustion engine includes adjustment devices that deactivate the intake and exhaust valve opening actuation. The controller is designed in such a way that, in the case of at least one specified condition (such as regeneration during unfired overrun or in the case of electric travel, in particular in the case of operation with high activation frequency of the internal combustion engine, e.g., in charge sustaining or HEV operation), the intake and exhaust valves are kept at least approximately (preferably completely) closed at least approximately simultaneously while the internal combustion engine is unfired. The internal combustion engine must be connected to the electrical machine. If there is a disconnect clutch, the disconnect clutch is brought into the closed state or remains closed.

A vehicle control apparatus to be mounted on a vehicle including an engine includes an electric motor, an electricity storage device, and a motor controller. The electric motor is coupled to the engine and generates motor power. The electricity storage device is coupled to the electric motor through a power supply cable. The motor controller causes execution of an assistance mode. The assistance mode includes controlling the electric motor to a powering state to transmit the motor power to the engine in operation. The motor controller permits the execution of the assistance mode on the condition that a rotation speed of the electric motor is lower than a threshold. The motor controller prohibits the execution of the assistance mode on the condition that the rotation speed of the electric motor is higher than the threshold.