A control device is configured to perform torque response slip control for bringing an engagement device into a slip engaged state so that transfer torque of the engagement device has a magnitude corresponding to required torque, shift control for shifting the shift speed of an automatic transmission, and transfer torque limit control for limiting the transfer torque of the engagement device to a value equal to or less than a limit value smaller than the required torque, the required torque being torque that is required to be transferred from the rotating electrical machine side to the automatic transmission via the engagement device that connects and disconnects power transmission between the rotating electrical machine and the automatic transmission. The control device performs the transfer torque limit control instead of the torque response slip control in a case where the torque response slip control is being performed when performing the shift control.

A hybrid all-wheel-drive vehicle includes an engine, first and second motor generators, a first clutch between the second motor generator and a front wheel, a second clutch between the second motor generator and a rear wheel, and a control unit that controls, based on a vehicle traveling state, the engine, the motor generators, and the clutches. The first motor generator is coupled to the engine and the front wheel in a manner capable of transmitting torque. During regeneration, the control unit engages the first clutch and disengages the second clutch. When the all-wheel-drive vehicle shifts from motor traveling to hybrid traveling, the control unit restarts the engine by operating the first motor generator and regulates engagement forces of the clutches and output torque of the second motor generator to compensate driving torque of the front wheel by the second motor generator while maintaining driving torque of the rear wheel.

Disclosed are a parallel start control method and system for a hybrid electric vehicle, and a hybrid electric vehicle. The parallel start control method includes: acquiring current working conditions of a clutch and a gearbox of the hybrid electric vehicle, an engine request torque of the hybrid electric vehicle and a start mode of the hybrid electric vehicle; judging whether the hybrid electric vehicle meets an over-heat protection condition according to the current working conditions of the clutch and the gearbox, and determining a start basic torque according to a judging result and the engine request torque; determining a start clutch request torque based on the start basic torque according to the start mode of the hybrid electric vehicle; and conducting start control on the clutch according to the start clutch request torque. The start security, responsiveness and power performance of the hybrid electric vehicle are improved.

A controller of a vehicle according to one aspect is a controller of a vehicle including: a driving source; a driving wheel; a friction clutch that transmits torque corresponding to an engagement amount of the friction clutch; a clutch actuator that changes the engagement amount of the friction clutch; and an acceleration operation sensor. The controller includes processing circuitry configured to: determine whether or not the friction clutch is in an engaged state; when it is determined that the friction clutch is not in the engaged state, control the clutch actuator such that the engagement amount of the friction clutch becomes a value corresponding to the acceleration operation amount received from the acceleration operation sensor; and control the driving source such that output torque of the driving source becomes a value corresponding to the engagement amount or a value corresponding to a parameter corresponding to the engagement amount.

A clutch torque estimation and control method for vehicle hybrid powertrain includes, in response to detecting a mode transition of the hybrid powertrain that involves a state change of a disconnect clutch arranged between two torque generating systems, initializing a Kalman filter based on a state space model for dynamics of the disconnect clutch, utilizing the Kalman filter to predict estimated speeds and torques for the state change of the disconnect clutch, determining a set of constraints for the state change of the disconnect clutch based on a sign of a slip speed across the disconnect clutch, applying the set of constraints to the predicted estimated speeds and torques to obtain final estimated speeds and torques for the state change of the disconnect clutch, and controlling the disconnect clutch based on the final estimated speeds and torques to improve the mode transition of the hybrid powertrain.

The method for controlling the starting of an internal combustion engine (MT) is implemented in an electric hybrid vehicle having a powertrain (eGMP) comprising the internal combustion engine and a hybrid transmission system (eTR), the transmission system having a rotating electric machine (ME) that is coupled to the engine via a clutch device (K0). According to the invention, the method comprises, during a phase for starting the engine with the electric machine while the vehicle is rolling, controlling (M_EB) the clutch by means of a maximum clutch torque setpoint determined according to a predetermined maximum speed gradient (LGR) and a moment of inertia (Jmth) of the engine, and controlling (M_MT) the engine by means of a maximum engine torque setpoint (CM) determined according to a difference (EC) between the maximum clutch torque setpoint and a torque (C0e) transmitted by the clutch.

Method comprising detecting that the vehicle is performing a transitional maneuver or detecting a braking request or a propulsion torque reduction while the vehicle is driving in a curve at grip limit based on first data indicative of driver intentions and/or vehicle motion state, detecting instability of the vehicle based on the first data, adjusting a torque request to the two clutches in response to the detected instability, wherein the two clutches are arranged to transmit the propulsion torque generated by the propulsion actuator to the wheels based on the torque request and based on the propulsion torque generated by the propulsion actuator, and wherein the torque request is adjusted based on the vehicle motion state and/or driver intentions such that a yaw motion of the vehicle is reduced.

A gear-shifting control method, a vehicle controller, and a hybrid vehicle, including: in a gear-shifting speed regulation phase of a gear-shifting process, pre-distributing a total speed regulation intervention torque, which is determined according to a target angular acceleration and a rotational inertia, into an input shaft intervention torque and a clutch intervention torque; and when the input shaft intervention torque does not exceed a torque intervention capability of a first motor, distributing the whole input shaft intervention torque to the first motor. Therefore, the rapid response capability and precision of the motor can be fully utilized to improve the gear-shifting performance.