The invention relates to a method for starting an internal combustion engine of a hybrid vehicle, where an electric motor of the hybrid vehicle is accelerated to a predetermined engine speed and a hybrid disconnect clutch, which is arranged between the internal combustion engine and the electric motor, is moved in the closing direction depending on the set-point clutch torque. In a method which safeguards a high reproducibility of the restart operation, the set-point clutch torque for restarting the internal combustion engine is determined depending on an engine switch-off position of the internal combustion engine in a first phase in which the internal combustion engine is not running.

A control method for a hybrid vehicle (1) is provided. The hybrid vehicle includes an electric motor (13) that drives the vehicle to travel, a generator (12) that supplies power to the electric motor, and an engine (11) that drives the generator. The control method includes storing the timing at which an amount or factor of change in target driving force (Fd) for the vehicle becomes a predetermined threshold or more, calculating an estimated trajectory of the rotational speed of the engine in accordance with the amount or factor of change in the target driving force, and when an increase request for power generation is issued to the engine at different timing than the timing, controlling the rotational speed of the engine on the basis of the calculated estimated trajectory.

A controller of a vehicle that includes a return control unit configured to carry out a complete engagement control of a power connecting/disconnecting device. At the time a return condition from inertia traveling to normal traveling is established and a down shift of an automatic transmission is requested, the return control unit carries out a down shift control of the automatic transmission so that a difference between an increasing gradient of a rotating speed of a first engaging portion and an increasing gradient of a rotating speed of a second engaging portion is within a predetermined range. At the time it can be regarded that the rotating speed of the first engaging portion and the rotating speed of the second engaging portion are synchronized, the return control unit completely engages the power connecting/disconnecting device.

A method for starting a combustion engine of a hybrid motor vehicle drivetrain, in which there is a connection clutch interposed between the combustion engine and the electric motor for transmitting a torque between the combustion engine and the electric motor, and a main clutch interposed between the gearbox and the electric motor. From an initial state in which the electric motor generates a drive torque and the combustion engine is stopped, the main clutch is kept in a closed state so as to transmit the torque generated by the electric motor to the gearbox, and the connection clutch is controlled so as to transmit a drive torque between the electric motor and the combustion engine and perform a torque-limiting function between the combustion engine and the electric motor in order to limit the transmission of acyclisms between the combustion engine and the electric motor.

Various applications for use of mass estimations of a vehicle, including to control operation of the vehicle, sharing the mass estimation with other vehicles and/or a Network Operations Center (NOC), organizing vehicles operating in a platoon and/or partially controlling the operation of one or more vehicles operating in a platoon based on the relative mass estimations between the platooning vehicles. When vehicles are operating in a platoon, the relative mass between a lead and a following vehicle may be used to scale torque and/or brake commands generated by the lead vehicle and sent to the following vehicle.

A hybrid vehicle for anti-rollover through active control of an engine and an anti-rollover control method for the same, may include detecting a roll angle of the vehicle, and when the detected roll angle is equal to or greater than a threshold roll angle, accelerating or decelerating, by a controller, the engine in a state in which the engine clutch is released depending on a direction of the roll angle.

When it is determined that there is a likelihood of occurrence of an abnormality in a supercharger, a maximum engine rotation speed and a maximum MG2 rotation speed are changed to a low rotation speed side and operating points of an engine and a rotary machine are controlled such that an engine rotation speed and an MG2 rotation speed are respectively within ranges which do not exceed the changed maximum rotation speeds. Accordingly, even when the supercharger does not operate normally and an abnormal increase in a supercharging pressure occurs, it is possible to curb a high-rotation state of the engine rotation speed and the MG2 rotation speed. As a result, even when an abnormal increase in the supercharging pressure occurs, it is possible to curb a decrease in durability of components.

A method of controlling an engine and a transmission of a vehicle includes: determining, by a controller, whether the engine is restarted after releasing the vehicle's SSC (Start & Stop coasting) or whether the vehicle is accelerating during NCC (Neutral Coasting control), determining an RPM and gear stage of the transmission if it is determined that the engine is restarted after releasing the vehicle's SSC or the vehicle is accelerating during NCC, determining a mild hybrid starter and generator (MHSG) target RPM and an MHSG target RPM gradient of the vehicle, performing, by the controller, MHSG RPM control of the vehicle to follow the MHSG target RPM and the MHSG target RPM gradient, determining whether the MHSG RPM slips compared to the MHSG target RPM, and performing proportional-integral-derivative (PID) control to follow the MHSG target RPM if the MHSG RPM slips compared to the MHSG target RPM.

A method of controlling a sleep maintenance motion includes: determining, by a sleep maintenance mode entry determiner, whether a vehicle enters a sleep maintenance mode; when the vehicle enters the sleep maintenance mode, calculating, by an engine target speed profile calculator, an engine target speed profile; calculating, by an engine/hybrid starter generator (HSG) target torque calculator, an engine/HSG target torque based on the calculated engine target speed profile; and controlling, by the sleep maintenance mode entry determiner, a sleep maintenance motion based on an operation of an engine/HSG.

A method of controlling an engine and a transmission of a hybrid vehicle includes steps of: determining whether the vehicle starts, determining an engine RPM and a gear stage of a transmission if the vehicle has started, determining whether the engine RPM has reached an engine speed control point, determining an engine target RPM and an engine target RPM slope of the vehicle when it is determined that the engine RPM has reached the engine speed control point, controlling the engine RPM of the vehicle to follow the engine target RPM and the engine target RPM slope, determining whether the engine RPM has slipped compared to the target engine RPM, and performing PID control to follow the engine target RPM if the engine RPM slips compared to the engine target RPM.