A method for operating a vehicle that includes a driveline disconnect clutch is described. In one example, the method adjusts torque of an electric machine in response to a estimated torque capacity of the driveline disconnect clutch. The estimated torque capacity of the driveline disconnect clutch is based on a combined inertia of a dual mass flywheel and the driveline disconnect clutch.

Operating an autonomous machine using analysis of machine vibration while it is operational. Accelerometers are used to measure the machines vibrations while it is being operated. If the vibrations exceed a predetermined acceleration a controller adjust the velocity of the machine to prevent/reduce further vibrations.

A CPU of a control device is configured to perform a specific cylinder fuel cutoff process of causing an internal combustion engine to operate such that supply of fuel to some cylinders out of a plurality of cylinders is stopped and supply of fuel to the other cylinders is maintained and a fastening force decreasing process of decreasing a fastening force of a lockup clutch of a torque converter. The CPU is configured to start the specific cylinder fuel cutoff process in a state in which the fastening force has been decreased through the fastening force decreasing process when the specific cylinder fuel cutoff process is performed in a state in which the internal combustion engine operates with a load.

The controller is programmed to perform first control that controls a driving force distributor such as to decrease a distribution rate upon satisfaction of a predetermined condition that a frequency of at least one rotation fluctuation of an output member of the drive system, a main drive wheel and a sub drive wheel is within a predetermined area, compared with the distribution rate upon non-satisfaction of the predetermined condition.

An embodiment method for controlling a hybrid vehicle includes driving a motor that starts an engine of the hybrid vehicle and controlling the motor to generate an engine starting torque to prevent a vibration of the engine, wherein the engine starting torque is generated by a feedforward control method. An embodiment device for controlling a hybrid vehicle includes a motor configured to start an engine of the hybrid vehicle, and a controller configured to drive the motor and control the motor to generate an engine starting torque to prevent a vibration of the engine, wherein the engine starting torque is generated by a feedforward control method.

A control unit is provided for a vehicle having an internal combustion engine with a shaft, which can be coupled to an electric machine or decoupled from the electric machine. The control unit is designed to couple the electric machine to the internal combustion engine during an engine stop of the internal combustion engine. The control unit causes the electric machine to guide the shaft of the internal combustion engine. The control unit determines that a speed of the guided shaft is equal to or less than a speed threshold value and, in response thereto, decouples the electric machine from the internal combustion engine, such that the internal combustion engine stops without being guided by the electric machine.

A hybrid vehicle including: an engine; output member that transmits driving force to drive wheels; a rotating electric machine; and a power split mechanism that splits and transmits the driving force output from the engine to the output member and the rotating electric machine, the mechanism including at least three rotating elements of an input element connected to the engine, a reaction force element connecting the rotating electric machine, and an output element connecting the output member, the machine capable of outputting reaction force torque to required engine torque based on an acceleration request to apply torque to the required engine torque to the drive wheel, where the machine does not output the reaction force torque, engine rotation speed increase control being able to be executed, engine torque limitation due to a NV requirement being able to be executed and which is relaxed during the engine rotation speed increase control.

A vehicle vibration control device includes: a motor generator connected via a motor shaft to a power transmission path between a crankshaft of an engine and a drive axle that transmits a drive torque to a tire; and a motor generator control portion executing control of an output torque which is actually output by the motor generator. The motor generator control portion includes a damper torque calculation section that acquires information on a crank angle and a motor angle to calculate a damper torque generated by a damper, an explosion cycle calculation section, a reverse phase torque calculation section, a delay time calculation section, a compensation time calculation section, a first compensation time calculation section, a torque correction amount calculation section, and a command output section.

A system for adjusting performance of an electric motor in a hybrid vehicle during a combustion event. The system includes a combustion engine including a cylinder, an electric motor including an electric motor shaft and connected to the combustion engine via a drive shaft, and an inverter controller connected to the electric motor. The inverter controller includes an electronic processor configured to receive a rotational position of the electric motor shaft, determine, based on the rotational position of the electric motor shaft, whether a combustion event is occurring in the cylinder, and when a combustion event is occurring in the cylinder, preform one selected from the group comprising increase torque produced by the electric motor and decrease the torque produced by the electric motor.

Methods, systems, and apparatus for controlling operation of a vehicle. The system includes a microphone located in a passenger cabin of the vehicle and configured to detect sound data indicating noise in the passenger cabin. The system also includes a powertrain of the vehicle including an engine/motor for propelling the vehicle and a transmission of the vehicle having a plurality of gears. The system also includes an electronic control unit (ECU) of the vehicle coupled to the microphone and the transmission. The ECU is configured to determine a powertrain torque limit based on the sound data, determine whether a torque output of the powertrain exceeds the powertrain torque limit, and instruct the transmission to downshift when the torque output of the powertrain exceeds the powertrain torque limit.