A method for adapting a biting point pressure of a hydraulically actuated hybrid disengaging clutch arranged in a hybrid drive train of a motor vehicle between an internal combustion engine and an electric machine includes step by step implementation during driving of the motor vehicle via a plurality of selected engagement operations of the hybrid disengaging clutch with a manipulation of a rapid filling routine. Proceeding from an initially stored biting point pressure, a setting pressure, which is reduced relative to a subsequent rapid filling routine, is incrementally increased step by step. An actual value, which is set in each case for a test parameter, is detected until the actual value corresponds to a setpoint value. A change in the transmission of torque of the hybrid disengaging clutch is derivable via the actual value.

An embodiment system for mild hybrid starter and generator (MHSG) failure diagnosis of a mild hybrid vehicle includes a data detection part configured to detect data for determining whether to activate a catalyst, and a controller configured to determine whether there is an MHSG failure using a deviation between a required torque and an actual operating torque of an MHSG after determining whether catalyst activation is needed and whether to start a stage of the MHSG failure diagnosis based on the data detected by the data detection part.

The embodiments disclose a method including separating kinetic speed from energy using a transmission platform, directing energy in the kinetic form at a predetermined speed from 0 to 100%, employing the transmission platform with fewer pieces to increase overall efficiency at a lower cost to produce, and integrating the transmission platform with combustion engines and electric motors to achieve more efficiency and greater performance.

Disclosed herein is a method of controlling a terrain driving mode of a hybrid vehicle, including defining demand torque required for vehicle driving depending on driver demand and an environment of a driving road, differentiating demand torque in response to the terrain driving mode, calculating accumulated driving energy from a time point of an operation in the terrain driving mode based on the differentiated demand torque, and determining a terrain driving method based on the calculated accumulated driving energy and a state of energy (SoE) in consideration of a state of charge (SoC) and a voltage condition of a battery cell.

Aspects of the present invention relate to a method and to a control system for controlling movement of a vehicle to provide vehicle creep, the vehicle comprising an engine and an electric traction motor, the control system comprising one or more controllers, wherein the control system is configured to: while a torque path between the engine and a first set of vehicle wheels is disconnected, control the electric traction motor to provide tractive torque to a second set of vehicle wheels to automatically move the vehicle to provide electric vehicle creep, wherein the electric vehicle creep is controlled by a mathematical model of engine creep torque that would be provided by the engine when the torque path between the engine and the first set of vehicle wheels is connected.

A method and a system for a drive control of a vehicle, the method for the drive control of the vehicle includes: obtaining request information reflecting a power demand of a user on the vehicle and performance information reflecting a power performance of the vehicle; determining whether the vehicle meets a condition for activating a parallel operation mode according to the request information and the performance information when a result of comparison between the request information and the performance information indicates that the vehicle power performance cannot meet the power demand of the user on the vehicle; and activating the parallel operation mode of the vehicle in order that the vehicle outputs a power that meets the power demand of the user on the vehicle in the parallel operation mode, when the vehicle meets the condition for activating the parallel operation mode.

A hybrid vehicle includes an engine, an electric machine configured to apply a negative torque during regenerative braking, and a multi-speed transmission coupled to the engine and having multiple discrete gear ratios. A controller is programmed to, in response to a request to decelerate the vehicle, command a shift of the transmission to a one of the gear ratios that is predetermined to rotate the electric machine at a speed that generates a regenerative-braking torque corresponding to a target deceleration of the vehicle without application of friction brakes.

When there is an abnormality in communications between a motor ECU and an HVECU in an automobile, the motor ECU controls a motor such that creep torque or a given torque larger than the creep torque is delivered from the motor. Thus, when there is an abnormality in communications between the HVECU and the motor ECU, the automobile is able to run in a limp home mode.

A system and method for modifying the engine pull-up (EPU) logic within a hybrid vehicle based on max motor torque that accounts for the drop or change in available motor torque due to the opening/slipping of a torque converter bypass clutch during engine starts is disclosed. An engine pull-up threshold is determined from max available motor torque at a virtual impeller speed, where the virtual impeller speed is the impeller speed that would result if the torque converter bypass clutch was open/slipping and transferring the same amount of torque.

A method for distributing electrical power to electric motors in an electric powertrain, in which the electric motors are electrically connected to a shared power supply, includes receiving input signals via a supervisory controller. The input signals include a total torque request of the electric powertrain and electrical limits of the power supply. The method includes determining an open-loop torque command for each respective motor in response to the input signals. In response to the total torque request and the power supply limits, the controller also determines maximum and minimum power limits of motor, with the maximum and minimum power limits including a calibrated power reserve for executing a predetermined torque operation. The method includes transmitting the open-loop torque command and the power limits to a respective motor control processor of each motor to thereby control the torque operation.