Abstract: A hybrid drive of a motor vehicle having an automated manual transmission with two coaxial input shafts and a common output shaft. The input shafts are respectively driven by an engine and an electric machine and can couple the output shaft via respective groups of gearwheel sets. Each gearwheel set comprises a gear fixed to the associated input shaft and an idler gear supported by respective countershafts. At least two idler gears disposed on one of the two countershafts of two gearwheel sets, within the transmission, assigned to two different input shafts, can be coupled via a winding-path shift element, and the two output constants are disposed in a common radial plane by using a common output gear disposed on the output shaft.

Abstract: A hybrid drive of a motor vehicle having an automated manual transmission with two input shafts and a common output shaft. The first input shaft can be connected to the drive shaft of an internal combustion engine by a clutch and can be brought into a drive connection to the output shaft by a first group of shiftable gearwheel sets. The second input shaft has a drive connection to the rotor of an electric machine, which can operate as a motor and a generator, and can be brought into a drive connection with the output shaft by a second group of selectively shiftable gearwheel sets. The input shafts can be coupled by coupling-shift element. The hybrid drive is provided with a second electric machine, which can operate as a motor and a generator and has a rotor that can be connected to the first input shaft.

Abstract: A power transmitting apparatus for a vehicle includes: an electric supplementary drive unit; a torque converting device including a planetary gear set having a first rotation element connected to the electric supplementary drive unit, a second rotation element connected to an engine, and a third rotation element operated as an output element; an input device including a first input shaft connected to the third rotation element through one clutch and provided with an input gear thereon, and a second input shaft coaxial with the first input shaft without rotational interference, connected to the second rotation element through the other clutch, and provided with an input gear thereon; a direct coupling device selectively connecting two rotation elements among the first, second, and third rotation elements of the torque converting device so as to cause the torque converting device to become a direct-coupling state; and a speed output device.

Abstract: The invention relates to a method for operating a drive device (1) of a motor vehicle, said drive device (1) comprising at least one combustion engine (3) and at least one electric machine (9), as well as a dual clutch transmission (4) which can be functionally connected to the combustion engine (3) and which comprises a first sub-transmission (5), a first clutch (6) being associated therewith, and a second sub-transmission (7), a second clutch (8) and the electric machine (9) being associated therewith. In a purely electrical driving operation, the electric machine (9) is operated in a motorised manner, a driving gear is engaged in the second sub-transmission (7), and both clutches (6, 8) are disengaged.

Abstract: A clutch control of a hybrid vehicle can engage a clutch which not otherwise possible due to temporary factors, and can determine whether engaging members of the clutch have been successfully engaged. The clutch control controls the clutch having a pair of the engaging members which are provided in a power transmission path of the vehicle, and which are moved in the axial direction and engaged or released when switching is performed between power from a motor and power from an engine. The clutch control device has a rotation control unit for synchronizing the rotations of the engaging members when the clutch is shifted from a disengaged an engaged state, and a clutch engagement control unit for determining whether the engaging members have been engaged, based on rotational speed of the engaging members a predetermined time after axial movement of the engaging members.

Abstract: A method and drive train for performing a gearshift from a first gear to a second gear in a vehicle provided with a manual or automated manual transmission is provided. A drivetrain incorporating the automated manual transmission includes an engine, connected via a clutch to an electric motor/generator, which in turn is connected to the manual or automated manual transmission and wherein the electric motor/generator is connected to a battery, other energy storing devices or a heating element. The method includes controlling the motor/generator to absorb a torque equalling the torque provided by the engine, such that the manual or automated manual transmission transfers a only minor, or no, torque, disengaging the first gear, controlling the torques absorbed by the motor/generator and provided by the engine such that an engine speed correlates to the engine speed necessary for propelling the vehicle at the second gear, and engaging the second gear.

Abstract: It is provided a control device of a hybrid vehicle having an engine, an electric motor, a clutch disposed in a power transmission path between the engine and the electric motor, and a hydraulic power transmission device with a lockup clutch disposed in a power transmission path between the electric motor and drive wheels, the control device being configured to engage the clutch and provide slip control of the lockup clutch when the engine is started from motor running using the electric motor, and to lower an engagement pressure of the lockup clutch as compared to the case of an engine start caused by an acceleration request from a driver if the start of the engine is an engine start caused by a request from a hybrid system.

Abstract: An ECU executes a program including the steps of: setting a creep torque reflection ratio; if brake is applied and the vehicle is currently stopped, updating the creep torque reflection ratio to 0; if brake is not applied and despite that the brake fluid's pressure is larger than a hydraulic pressure value, determining that brake hold control is currently exerted, and reducing the creep torque reflection ratio, as based on a map having the brake fluid's pressure as a parameter, to update the creep torque reflection ratio.

Abstract: A method for controlling vehicle creep includes controlling motor speed to produce the desired creep speed, if desired creep speed exceeds vehicle speed; controlling motor torque to produce the desired wheel torque, if desired wheel torque exceeds actual wheel torque; and controlling motor torque to decelerate the vehicle to creep speed, if vehicle speed is decreasing and exceeds the desired speed.

Abstract: A first slip travel mode is traveling or starting in a state where a first clutch is fully connected and a third clutch is fully disconnected while a second clutch is slipped. A second slip travel mode is traveling or starting in a state where the first clutch is fully connected and the second clutch is fully disconnected while the third clutch is slipped. An overheat avoidance mode is traveling or starting in a state where the first clutch is fully disconnected and the second clutch is fully connected while the third clutch is slipped. When the second clutch is in a high-temperature state under the first slip travel mode or the third clutch is in a high-temperature state under the second slip travel mode, the slip travel mode is switched into the overheat avoidance mode. This reduces a heat value of the second clutch or third clutch.

Abstract: A power transmitting apparatus may include: an electric supplementary drive unit; a torque converting device having first, second, and third rotation elements, wherein the first rotation element is connected to the electric supplementary drive unit, the second rotation element is connected to an engine, and the third rotation element is operated as an output element; a first input shaft directly connected to the second rotation element, and a second input shaft directly connected to the third rotation element; a direct coupling device selectively connecting two rotation elements among the first, second, and third rotation elements, a first speed output unit having first and second synchronizer modules, and a second speed output unit having third and fourth synchronizer modules; and a reverse speed device having an idle gear and engaging to any one input gear on the first and second input shafts.

Abstract: A drive system for a hybrid vehicle includes an electric motor including a stator and a rotor, an input hub rotatably connected to an engine, an output hub to which the rotor is mounted, a clutch device connecting and disconnecting the input hub to the output hub, a case including a front sidewall portion, a rear sidewall portion and an outer circumferential wall portion connecting an outer circumferential portion of the front sidewall portion to an outer circumferential portion of the rear sidewall portion and housing the electric motor, the input hub, the output hub and the clutch device, a first bearing on which the input hub is journaled, a second bearing on which the output hub is journaled, and a third bearing positioned between the first bearing and the second bearing and relatively rotatably supporting the input hub and the output hub.

Abstract: A power transmission apparatus (11) for four-wheel-drive hybrid vehicle according to the present invention is characterized in that it comprises a front-wheel/rear-wheel driving-force distributor means (21) for distributing rotary powers, which are output from an internal combustion engine (31) as well as a rotary electric appliance (32), between front wheels (91) and rear wheels (93), and then transmitting the rotary powers to them; wherein the front-wheel/rear-wheel driving-force distributor means (21) sets up the following when braking a vehicle: a rear-wheel disconnection mode for disconnecting between the front-wheel/rear-wheel driving-force distributor means (21) and the rear wheels (93); a front-wheel connection mode for connecting between the front-wheel/rear-wheel driving-force distributor means (21) and the front wheels (91); and a regeneration mode for regenerating the rotary powers from the front wheels (91) by the rotary electric appliance (32).

Abstract: A powertrain operable in input-split, output-split and compound-split operating modes includes a first motor/generator continuously connected with a first member of a first planetary gear set. A second motor/generator is continuously connected with a first member of a second planetary gear set. An input member is continuously connected with a second member of the first planetary gear set. An output member is continuously connected with a second member of the second planetary gear set. A first brake grounds a third member of the first planetary gear set. A second brake grounds a third member of the second planetary gear. A first clutch connects the third member of the first planetary gear set with the second member of the second planetary gear set. A second clutch connects the second member of the first planetary gear set with the third member of the second planetary gear set.

Abstract: A method to execute a shift in a powertrain including a plurality of torque generative devices rotatably connected through a first clutch includes operating the powertrain in a continuously variable operating range state, and monitoring a command to execute the shift including monitoring a target speed for a first torque generative device, and monitoring a command to disengage the first clutch. The first clutch is shifted from an engaged state to a disengaged state, including operating a torque phase of the first clutch wherein the first clutch is transitioned from the engaged state to the disengaged state, and simultaneous with the torque phase, operating an inertia speed phase of the first clutch wherein a speed of the first torque generative device is transitioned from an initial speed to the target speed.

Abstract: A vehicle drive device includes an input coupled to an internal combustion engine; an output coupled to wheels; first and second rotary electric machines; a differential including at least three rotary elements; a control; and an engagement device. The control determines, when engine stop conditions are established while the engagement device is drivably connected, the engine is operating, and the output member is rotating, whether rotation of the first electric machine when stop conditions are established is opposite to rotation of the first electric machine when rotation of the engine stops; executes torque control where the first electric machine outputs torque to reduce the rotational speed of the engine when the stop establishing rotational direction is opposite to the subject rotational direction; and issues a command to release the drivable connection when the rotational speed of the first electric machine falls within a rotational speed range that includes zero.

Abstract: The clutch control device for a hybrid vehicle comprises an engine, an automated manual transmission, a clutch device and a clutch actuator concluding an output rod and a master cylinder which generates a hydraulic pressure therein by closing an idle port in response to the stroke of the output rod, a slave cylinder in fluid communication with the master cylinder through a passage and controlling the clutch device to be in engagement state or disengagement state operated by the hydraulic pressure generated by the master cylinder and a clutch engagement state holding control portion for temporarily holding the clutch device to be in the engagement state by operating the master cylinder to close the idle port after the engagement state under the vehicle being running under a motor drive mode continued for a predetermined time.

Abstract: Mutual interference between a hydraulic pressure of a first engagement device and a hydraulic pressure of a second engagement device is suppressed even in the case where operation of the first engagement device and operation of the second engagement device coincide with each other. A vehicle drive device includes a first engagement device that selectively couples a rotary electric machine to an internal combustion engine, and a fluid coupling. The first engagement device includes a first oil chamber that is formed to apply a back pressure to a first piston. The fluid coupling includes a second oil chamber configured to control an engagement state of a second engagement device. The vehicle drive device includes a first control valve that controls a first oil chamber hydraulic pressure, and a second control valve that controls a second oil chamber hydraulic pressure independently of the first oil chamber hydraulic pressure.

Abstract: It is an object of the present invention to provide a compact torque transmission device. The torque transmission device includes an input-side member, an output-side member, a clutch and a pressing mechanism. The clutch is configured to transmit or cut torque between the input-side member and the output-side member. The pressing mechanism includes a pressing member for pressing the clutch, and a pressing device. The pressing device is a device for pressing the pressing member, and is disposed on the inner peripheral side of the clutch.

Abstract: The present invention provides a method for reducing backlash vibrations in a hybrid electric vehicle, in which the backlash vibrations generated between a motor and a driving wheel can be easily reduced by slipping a clutch in an automatic transmission when the direction of a motor driving torque is changed while the hybrid electric vehicle is running in electric vehicle (EV) mode.

Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor is substantially constant with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint to a precharge point, and reduces the control setpoint to a corrected point that is lower than or substantially equal to the initial point and higher than the reference point.

Abstract: A control device for a vehicular drive apparatus, includes: a torque converter having a pump wheel, a turbine wheel and a stator wheel rotatably disposed between the turbine wheel and the pump wheel; an electric motor operative to drive and/or apply a brake to the stator wheel; a first connecting/disconnecting means operable to connect/disconnect the electric motor and the stator wheel to and from each other; a second connecting/disconnecting means operable to connect/disconnect the electric motor and an output shaft to and from each other; and mode switching means for switching a first mode in which the first connecting/disconnecting means is held in a connecting state to allow the electric motor to control a rotating state of the stator wheel and a second mode in which the second connecting/disconnecting means is held in a connecting state to enable the electric motor to perform power running and regeneration, depending on a running condition of a vehicle.

Abstract: In a method for operating a hybrid drive device for a motor vehicle having at least one internal combustion engine, another drive unit and a separating clutch, to start the internal combustion engine the separating clutch is engaged, and during the start of the internal combustion engine, a setpoint rotational speed is predefined for the other drive unit. This setpoint rotational speed for the other drive unit is determined with the aid of a drivetrain model.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine may be operated at an idle speed while a driveline disconnect clutch separating the engine from a driveline is open in response to a reduction in driver demand torque. Engine torque may be applied to the driveline by simply closing the driveline disconnect clutch.

Abstract: A vehicle includes an engine and a fraction motor. A clutch is configured to selectively mechanically couple the engine to the traction motor. A controller or controllers are provided that are configured to command a change in magnitude of an electric current supplied to the electric machine. The command is made in response to initiation of the clutch engaging the traction motor to the engine. The change in magnitude of the electric current ensures the speed of the traction motor remains generally constant during clutch engagement while a speed of the engine is less than that of the traction motor.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a driveline may selectively enter a sailing mode to provide quick driveline torque response with reduced impact on fuel economy.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a transfer function of a driveline disconnect clutch is adapted.

Abstract: A vehicle includes an engine, an electric machine, a transmission, and at least one controller. The at least one controller, in response to a gear shift of the transmission that causes a speed of the engine to exceed a predetermined speed, commands a change in current to the electric machine such that the speed of the engine decreases to a target speed to avoid engine flare.

Abstract: A vehicle has an engine, an upstream clutch, an electric machine, a downstream clutch, a transmission gearbox, and a controller. The controller is configured to: (i) control engagement of the downstream clutch, (ii) monitor a vehicle torque, and (iii) control electric machine torque to a designated rate when the vehicle torque changes direction and the electric machine is operating. A method for controlling a hybrid vehicle includes engaging a clutch downstream of the electric machine, monitoring a vehicle torque, and controlling electric machine torque to a designated rate when vehicle torque changes direction and the electric machine is operating. A hybrid vehicle system has an electric machine and a controller configured to (i) control electric machine torque to a designated rate within a time zone, and (ii) control at least one of the electric machine torque and an engine torque to meet driver demand outside of the zone.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, compensation is provided for a dual mass flywheel positioned in a vehicle driveline. The approaches may reduce driveline torque disturbances.

Abstract: A method for controlling a hybrid vehicle having a traction motor between an engine and a step ratio automatic transmission during a startup of the hybrid vehicle. The method includes performing at least one of adjusting a clutch or an oil pressure to change a transmission tie-up force or downshifting the transmission in response to an actuation rate of a vehicle driver demand.

Abstract: A system and method for controlling a hybrid vehicle including a transmission having a torque converter with a bypass clutch include controlling the slip between the impeller and the turbine of the torque converter in slip mode operation to regulate the converter torque ratio and maintain substantially constant torque at the turbine. Controlled slip uses the hydrodynamic coupling of the torque converter to balance the desired and delivered torque while damping torque disturbances transmitted through the driveline to manage noise, vibration and harshness (NVH).

Abstract: A control system including a method and apparatus for operating a hybrid vehicle. A disconnect clutch selectively separates an electric machine from a combustion engine. If a wide open throttle or high torque command is requested and the combustion engine is shut down, a 12 volt starter may be used to start the combustion engine while disconnected from the electric machine and all of the electric machine torque available may be used for traction.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, compensation for a driveline disconnect clutch is provided. The approaches may reduce driveline torque disturbances.

Abstract: A controller and a control strategy for a hybrid electric vehicle having a traction motor between an engine and an automatic transmission include maintaining a bypass clutch of a torque converter in an engaged position and applying a motor torque from a traction motor to the torque converter such that slip of the torque converter does not otherwise reach zero while the bypass clutch is maintained in the engaged position.

Abstract: A vehicle transmission system having a combustion engine, an electric motor and a transmission includes a first clutch operatively connected between the engine and the motor and a one way clutch. The one way clutch is connected in parallel with the first clutch that permits the engine to increase speed with the clutch disengaged until the engine speed matches the motor speed. The engine provides positive torque through the one way clutch to the motor and transmission upon matching the motor speed. The first clutch and the one way clutch may be a hybrid rocker one way clutch.

Abstract: Systems and methods for learning torque estimate errors and updating torque estimation models are presented. In one example, torque errors are learned during an engine shut-down, after a disconnect clutch coupled between an engine and an electric machine has been released. An updated torque estimation model is then used to control torque during subsequent engine operation to improve drive feel and vehicle performance.

Abstract: A system and a method for controlling a hybrid vehicle powertrain during a change from a two-wheel drive mode to a four-wheel drive mode is provided. In response to a request to couple the second pair of wheels to the powertrain, a driveline controller commands an increased torque from the electric motor to be applied to the first pair of wheels The increased torque from the electric motor is based on an AWD engagement torque of the second pair of wheels to counteract an engagement torque of a second pair of drive wheels before changing from the two-wheel drive mode to the four-wheel drive mode.

Abstract: A controller and control strategies minimize shift shock in a hybrid electric vehicle during a downshift during regenerative braking by maintaining the transmission input speed substantially linear when the transmission input speed is slowing. The controller and the control strategies control the regenerative braking torque during a downshift occurring during regenerative braking in such a way that the transmission input speed is maintained substantially linear when the transmission input speed is slowing during a torque phase of the downshift.

Abstract: A system and method for reducing torque disturbances during a shift event for a hybrid vehicle having an engine selectively coupled to a traction motor and an automatic transmission to control or compensate actual transmission input shaft torque based on measured transmission input torque by controlling a torque source, such as a traction motor. The system and method may include an engine, a transmission, a traction motor between the engine and the transmission with the engine being selectively coupled to the motor and the transmission by a disconnect clutch and a controller configured to control motor torque to cause an actual transmission input shaft torque to achieve a target transmission input shaft torque during a transmission shift event.

Abstract: A system and method for controlling a hybrid vehicle having an engine, a traction motor, and a transmission selectively coupled in series by a clutch include modulating engine torque while the clutch is disengaged and while engine speed is less than motor speed to increase the engine speed. The clutch is engaged to connect the engine to the motor in response to the engine speed exceeding the motor speed.

Abstract: A system and method for controlling a hybrid vehicle having an engine, a battery powered traction motor, and an automatic step-ratio transmission selectively coupled in series by a clutch include engaging the clutch to couple the engine and the motor and controlling motor torque to provide braking torque through the transmission to substantially maintain a cruise control speed. In one embodiment, a hybrid electric vehicle includes a battery powered traction motor connected to a transmission, an engine selectively coupled in series with the motor by a clutch, and a controller communicating with the traction motor and the engine and configured to control the motor to provide braking torque when the clutch is engaged and engine braking torque is insufficient to maintain cruise control speed of the vehicle as the vehicle travels downhill.

Abstract: A vehicle is provided with an engine, an electric machine connected to the engine by an upstream clutch, a transmission gearbox connected to the electric machine by a downstream clutch, and a controller. The controller is configured to: (i) slip a downstream clutch, (ii) limit a torque output of an electric machine to a threshold value, (iii) engage an upstream clutch while the downstream clutch is slipping, and (iii) engage the downstream clutch. A method for controlling an electric machine in a vehicle during an upstream torque disturbance is provided. The downstream clutch is slipped and the torque output of an electric machine is limited to a threshold value. The upstream clutch is engaged while the downstream clutch is slipping. The downstream clutch is engaged.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operating modes may be manually selected to improve hybrid driveline operation during off road conditions. The approaches may improve vehicle drivability and reduce driveline degradation.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, a driveline disconnect clutch transfer function may be adapted in response to engine operating conditions during closing of the driveline disconnect clutch.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, driveline operation may be adjusted in response to operating the hybrid vehicle in a four wheel drivel low gear range. The approaches may improve vehicle drivability and reduce driveline degradation.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, operation of a driveline disconnect clutch is adjusted to compensate for clutch wear and manufacturing tolerances.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, an engine is started and idled before engine torque is required so that driveline torque response may be improved.

Abstract: A system and method for controlling a vehicle having an electric traction motor coupled to a transmission by a clutch include modifying torque transmitted to the driveline by modifying the clutch apply pressure in response to a difference between rotational speed of a driveline component and a filtered rotational speed of the driveline component to reduce driveline oscillation when the clutch is unlocked. The clutch pressure may be modified in response to a vehicle event that may otherwise induce driveline oscillations, such as a transmission ratio change or regenerative braking, for example.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, external data are a basis for operating a driveline disconnect clutch. For example, a vehicle destination may be a basis for opening a driveline disconnect clutch and beginning to discharging an energy storage device so that fewer hydrocarbons may be consumed by the vehicle.