Abstract: A driving force control system for a hybrid vehicle is provided to reduce a shock resulting from switching a travelling direction between the forward direction and the backward direction. The control system is applied to a hybrid vehicle in which an operating mode can be selected at least from a series mode and a series parallel mode. A travelling direction of the vehicle is switched by a shifting device between forward direction and backward direction. A controller is configured to maintain the previous operating mode after switching the travelling direction of the vehicle by the shifting device.

Abstract: A transmission includes a main gear set, an auxiliary gear set and an electric motor with a rotor and a stator. A third shaft of the main gear set is connected to a transmission output shaft. A second shaft of the auxiliary gear set is connectable through a first auxiliary shift element to a first shaft of the main gear set and through a second auxiliary shift element to the third shaft of the main gear set or to a fourth shaft of the main gear set. A third shaft of the auxiliary gear set is constantly connected to a second shaft of the main gear set. A first shaft of the auxiliary gear set is constantly connected to the rotor.

Abstract: Methods and systems are provided for a vehicle engine including a turbocharger coupled to a hydraulic pump and hydraulic accumulator. In one example, a method may include, in response to the vehicle coming to a stop, supplying pressure to a hydraulic braking system of the vehicle from the accumulator coupled to a hydraulic pump coupled to a shaft of a turbocharger of an engine installed in the vehicle, and automatically shutting down the engine while the vehicle is stopped.

Abstract: A vehicle system controller is configured to determine a current buffer ratio for a first energy buffer based on a current buffer energy level for the first energy buffer and a predetermined buffer range for the first energy buffer, and determine if the current buffer ratio for the first energy buffer should be increased using energy provided by a power converter, the determination being based on the current buffer ratio for the first energy buffer and a cost for generating energy from energy stored in a second energy buffer using the power converter.

Abstract: A hybrid vehicle includes an engine, a traction motor, a battery, and a controller. The controller is programmed to, responsive to the engine achieving maximum torque capacity while the engine and motor operate to completely satisfy a demand that exceeds the maximum torque capacity, maintain the engine at the maximum torque capacity and reduce torque output of the motor to a non-zero value such that the engine and motor do not operate to completely satisfy the demand.

Abstract: It is preferable to reduce an uncomfortable feeling arising from an abrupt driving force generated in an automatic starting clutch in an automatic clutch vehicle. When an automatic clutch operating device is about to automatically engage a starting clutch, a brake controller drives a brake actuator to forcibly actuate a brake device, thereby braking a driving wheel WR. Here, a brake pressure to be applied to the driving wheel WR can be set as a brake pressure such as to change an expected driving torque which is accompanied by an uncomfortable feeling in the absence of control by the brake controller into a norm driving torque which is not accompanied by the uncomfortable feeling, taking into account the clutch capacity and an engine control output.

Abstract: A control apparatus of a powertrain with a centrifugal pendulum absorber, includes an engine formed with a plurality of cylinders, a drive force transmission shaft for receiving an engine output torque, a centrifugal pendulum absorber for reducing a variation in the output torque, a connect-disconnect mechanism, an engine controlling module for shifting an engine operating state between an all-cylinder operation and a reduced-cylinder operation, and a connection controlling module. The connection controlling module shifts a connecting state of the connect-disconnect mechanism to a first state when the engine is in the all-cylinder operation, and shifts the connecting state to a second state in which the connection is tighter than the first state when the engine is in the reduced-cylinder operation. In response to issued requests to shift the engine operating state, the connection controlling module shifts the connecting state, and the engine controlling module shifts the engine operating state.

Abstract: The present invention provides a method for controlling an engine unit in a vehicle. The vehicle includes an engine unit, a transmission unit adapted to selectively couple with the engine unit and also configured to transmit the power generated by the engine unit, a first motor generator coupled with the transmission unit, an output unit, a power switching device, a second motor generator configured to drive at least one of front and rear wheels, and a power battery that is respectively connected to the first motor generator and the second motor generator. The method includes: acquiring an operating mode of a vehicle and an operating parameter of the vehicle; and controlling an engine unit according to an operating parameter and an operating mode to start or stop.

Abstract: A hybrid vehicle includes an electronic control unit configured to, when the drive mode is changed from one of the series-parallel mode and the parallel mode to the other one of the series-parallel mode and the parallel mode and the speed stage is changed from one of the low speed stage and the high speed stage to the other one of the low speed stage and the high speed stage, selectively execute either one of a first control and a second control. The first control is control in which the drive mode and the speed stage are changed by passing through the series mode. The second control is control in which one of the drive mode and the speed stage is changed and then the other one of the drive mode and the speed stage is changed without passing through the series mode.

Abstract: The present disclosure discloses a cruise control method for a vehicle. The vehicle includes an engine unit, a transmission unit, a first motor generator, an output unit, a power switching device, a second motor generator, and a power battery. The cruise control method includes the following steps: when a signal for a vehicle to enter cruise control is detected, determining whether the vehicle meets a preset cruise control condition; and if the vehicle meets the preset cruise control condition, controlling the vehicle according to a current operating mode of the vehicle to enter a corresponding cruise mode, where when the current operating mode of the vehicle is an EV mode, the vehicle is controlled to enter an EV cruise mode, and when the current operating mode of the vehicle is an HEV mode, the vehicle is controlled to enter an HEV cruise mode. The present disclosure further discloses a vehicle.

Abstract: A method is provided for operating a motor vehicle which has at least one electric machine as a driving device. The method includes examining a current driving situation to determine whether a target position can be reached with a target speed by coasting; displaying a message to a driver of the motor vehicle if the target position can be reached by coasting; detecting a reaction time of the driver from the message up to the initiation of a coasting process by the driver; and actuating the electric machine as a generator to generate a deceleration torque if the reaction time exceeds a predefinable limiting value.

Abstract: A method for reducing energy of torque for electrically boosting acceleration of a hybrid vehicle including a power train, a heat engine, an electric machine capable of jointly or separately outputting a torque to a wheel in accordance with management laws optimizing energy consumption of the vehicle, and a traction battery which is capable of recovering all or part of kinetic energy of a decelerating vehicle in a form of electric energy, and rechargeable via the heat engine. In the method electric boost torque available for the torque boost is reduced by a reduction coefficient of 0 to 1 according to an amount of energy remaining in an energy range of the battery reserved for the torque boost.

Abstract: An apparatus for controlling a torque intervention of a hybrid vehicle includes a driving information detector for detecting a torque intervention request of the hybrid vehicle, and a controller for deriving a target motor torque and a target engine torque depending on a required torque variation when the torque intervention is requested, the target motor torque being derived so that a high voltage battery does not deviate from a state of charge (SOC) charging and discharging limit, the target motor torque limiting the target engine torque to be equal to or less than a target engine torque before the intervention request to obtain a final engine torque, and the target motor torque correcting the target motor torque to a final motor torque depending on the final engine torque.

Abstract: A method for operating a drive apparatus including an internal combustion engine and an electric engine. An output shaft of the drive apparatus can be operatively connected to the internal combustion engine by way of a shifting clutch and can be permanently operatively connected to the electric engine, so that the output shaft is disengaged from the internal combustion engine in a first shifting state of the shifting clutch and is engaged with it in a second shifting state.

Abstract: A method for protecting a clutch for a Dual Clutch Transmission may include an input step of receiving an input of a temperature of a clutch, and a gear shift pattern changing step of changing a preset gear shift pattern and operating to perform gear shift in a vehicle speed region that secedes from a vehicle speed of the preset gear shift pattern when the temperature of the clutch is equal to or higher than a first reference temperature.

Abstract: The present disclosure provides a shift control method for a hybrid vehicle with a DCT that includes: a shifting state-determining step in which a controller determines whether an inertia phase of power-off down-shift is entered; a motor torque-adjusting step that request to reduce regenerative braking torque of a motor as much as a predetermined requested reduction amount, when the controller determines that the inertia phase has been entered in the shifting state-determining step; and a clutch torque-reducing step that ends the motor torque-adjusting step and reduces torque of an engagement clutch, when the requested reduction amount of the regenerative braking torque of the motor is less than zero while the controller performs the motor torque-adjusting step.

Abstract: A driving control method for a hybrid vehicle is provided to overcome a slip of the vehicle by a conversion of an EV mode into an HEV mode. The driving control method includes: determining by a controller whether the hybrid vehicle is insufficiently driven backward only by power of a motor when the vehicle is driven backward on an uphill road by driving the motor backward; starting an engine and engaging a backward stage gear; releasing a first clutch and at the same time requesting a brake operation signal to the hybrid vehicle while the motor is converted into forward driving; and then engaging a second clutch and requesting a brake release signal to the hybrid vehicle while an engine clutch is engaged to control the hybrid vehicle to be started by the power of the motor and the engine.

Abstract: A drive force transmission device is provided with a motor shaft, a transmission input shaft, a drive side sprocket, a resolver rotor and a cylindrical resolver retainer. The motor shaft is configured to be connected to a motor rotor of a motor. The driving force transmission shaft is coaxially connected to the motor shaft. The oil pump sprocket is provided on the driving force transmission shaft for rotating an oil pump. The resolver rotor is disposed on the motor shaft adjacent the oil pump sprocket for detecting a rotational position of the motor. The cylindrical resolver retainer is coaxially disposed on the motor shaft to fix the resolver rotor to the motor shaft. The resolver retainer includes a stopper that forms an axial positioning surface for the resolver rotor by contacting an end portion of the motor shaft, and an axial position limiting surface of the oil pump sprocket.

Abstract: The present disclosure provides a shifting control method for a DCT vehicle which includes determining, by a controller, whether an entry condition is satisfied, the entry condition including information about whether a tip-out occurs while a power-on upshift torque phase is being performed, and when the entry condition is satisfied, responding, by the controller, to the tip-out where the controller controls an engaging clutch and a disengaging clutch using the calculated torque.

Abstract: A method for preventing engine clutch hazard of a hybrid vehicle includes: transmitting, by a safety module of a controller, a signal which instructs an engine clutch to be engaged or released to a safety module of an actuator that drives the engine clutch that connects an engine with a motor or disconnects the engine from the motor; and controlling, by the safety module of the actuator, the engine clutch to perform a normal operation based on the signal.

Abstract: A first transmission mechanism provided on a first power transmission path and a second transmission mechanism provided on a second power transmission path are provided in parallel with each other between a driving force source and a drive wheel. A first clutch mechanism transmits power or interrupts transmission of power in the first power transmission path. A dog clutch equipped with a synchromesh mechanism transmits power or interrupts transmission of power in the second power transmission path. An electronic control unit is configured to, when changing from the first transmission path to the second transmission path a state where the vehicle is stopping or is stationary and in a state where power of the driving force source is transmitted via the first transmission mechanism, actuate the first clutch mechanism and the second clutch mechanism such that the first clutch mechanism is released and the second clutch mechanism engages.

Abstract: A transmission for a hybrid vehicle includes an input shaft connected to an engine, an output shaft disposed in parallel with the input shaft, a first hollow shaft installed on an outer peripheral surface of one side of the input shaft, a second hollow shaft installed on an outer peripheral surface of the other side of the input shaft, a first motor connected to the first hollow shaft, a second motor connected to the second hollow shaft, a first speed-shifting output part provided between the first hollow shaft and the output shaft, a second speed-shifting output part provided between the second hollow shaft and the output shaft, a first synchronizer synchronously connecting the first hollow shaft to the first speed-shifting output part, and a second synchronizer synchronously connecting the second hollow shaft to the second speed-shifting output part.

Abstract: A method for monitoring a fixed-gear transmission includes deriving a node speed relationship for each of the planetary gear sets based upon a center distance and a gear ratio and determining equivalent speed parameters for nodes of the planetary gear sets based upon a transmission input speed state, an intermediate node speed state and a transmission output speed state. A clutch slip speed relationship is determined for each of the clutches based upon the node speed relationships for the planetary gear sets and the equivalent speed parameters for nodes of the planetary gear sets. Rotational speed sensors monitor the input transmission speed, the intermediate node speed and the transmission output speed. A clutch slip speed for each of the clutches is determined based upon the respective clutch slip speed relationship and the monitored input transmission speed, the monitored intermediate node speed and the monitored transmission output speed.

Abstract: A first ring gear of a drive unit is connected to a second carrier and is mechanically connected to a counter shaft. A first sun gear is connected to a second sun gear and a first rotary electric machine. A first clutch selectively switches between a connection state and a disconnection state of the first sun gear and an engine. A second clutch selectively switches between a connection state and a disconnection state of a first carrier and the engine. A brake selectively switches between a fixed state and a release state of a second ring gear to and from a fixing member.

Abstract: A vehicle includes an engine, an electric machine, an engine disconnect clutch, and a transmission input configured to transmit power from the engine and electric machine to a transmission. The vehicle also includes a controller program to close the disconnect clutch and start the engine before downshifting in response to an anticipated transmission downshift in which a predicted speed of the transmission input after the downshift will be outside a predetermined speed range or a torque capacity of the electric machine will be less than a predicted required torque after the downshift.

Abstract: A hybrid power-train includes an input shaft connected to an engine and an output shaft disposed in parallel with the input shaft. A motor is connected to the input shaft and the output shaft. A drive mechanism connects the engine, the motor, and the output shaft. A plurality of clutches are operable for coupling and releasing, respectively, to perform a mode conversion.

Abstract: A power transmitting apparatus may include a first input shaft to selectively receive torque of an engine, a second input shaft to selectively receive the torque of the engine and having at least one input gear, a third input shaft selectively connected to the second input shaft and having at least one input gear, a motor/generator operated as a motor or a generator, a planetary gear set including a first rotation element directly connected to the motor/generator, a second rotation element directly connected to the third input shaft, and a third rotation element directly connected to the first input shaft, a first speed output unit adapted to convert torque input from the second input shaft or the third input shaft and output the converted torque, and a second speed output unit to convert torque input from the second input shaft or the third input shaft and output the converted torque.

Abstract: A method for controlling torque intervention of a hybrid electric vehicle during a shift includes judging whether or not torque intervention control is necessary, determining a torque intervention demand according to states of a motor and an HSG, upon judging that torque intervention control is necessary, and executing torque intervention control by HSG and motor torque reduction amounts under the condition that engine torque is maximally maintained based on the determined torque intervention demand.

Abstract: Disclosed is a startup control method for a hybrid vehicle, the method including judging, by a controller, whether starting motion of the vehicle is possible using only a motor or whether starting motion of the vehicle additionally requires power of an engine, preparing the power of the engine, by the controller, by igniting the engine and also initiating engagement of a driving gear when it is judged that starting motion of the vehicle additionally requires the power of the engine, and linearly increasing a torque of the motor to a maximum value, and completing the remainder of a motion start process by increasing a torque of a clutch while increasing a torque of the engine, by the controller, when transmission of the power of the engine to a drive wheel becomes possible via the preparation of the power of the engine.

Abstract: Methods and systems are provided for improving engine restart operations occurring during a transmission shift in a hybrid vehicle. Engine speed is controller during cranking and run-up to approach a transmission input shaft speed that is based on the future gear of the transmission shift. Engine speed is controlled via adjustments to spark, throttle, and/or fuel, to expedite engine speed reaching the synchronous speed.

Abstract: A method is provided for operating a hybrid drive train of a hybrid vehicle. The drive train has an internal combustion engine, a first electric machine, a transmission with an input shaft, a separating element and a first axle. The internal combustion engine can be connected to the first electric machine via the separating element. When the separating element is opened and the internal combustion engine is stationary, a difference in rotational speed occurs at the separating element between the internal combustion engine and the rotating first electric machine. The separating element is opened below and up to a maximum permissible difference in rotational speed at the separating element to drive the hybrid vehicle purely electrically by the first electric machine or to brake the vehicle or to coast. Above the maximum permissible difference in rotational speed the separating element and the first electric machine are separated from one another.

Abstract: A selectively actuatable one-way clutch is controlled to brake or release a generator such that a powersplit hybrid powertrain enters or exits a parallel mode of operation. To brake the generator and enter the parallel mode, the clutch is activated while overrunning the generator before the generator is slowed to engage the clutch. To release the generator and exit the parallel mode, the generator is controlled to overrun the clutch before deactivating the clutch and returning the generator to a base speed control.

Abstract: The present disclosure relates to a control method of a dual clutch transmission for a vehicle and a control system for the dual clutch.

Abstract: A parallel hybrid vehicle includes an engine and a motor separated along a driveshaft by a clutch. The motor can operate (either alone or in combination with the engine) to provide positive drive torque to the wheels. The motor can also act as a generator and provide negative torque when converting mechanical energy from the driveshaft into mechanical energy to be stored in a battery. The clutch selectively couples the motor to the engine. Torque and its effects on the clutch can vary dramatically when the motor changes from providing positive and negative torque, and vice versa, while the engine is running. At least one controller in the vehicle is programmed to, while the engine is running, initiate an increase in pressure at the clutch in response to an anticipated change in torque provided by the motor from positive to negative or from negative to positive.

Abstract: Methods and systems are provided for improving engine restart operations responsive to a heavy operator pedal tip-in. Engine torque and disconnect clutch capacity are controlled during cranking and engine speed run-up so as to provide excess torque to accelerate the engine to the motor speed and prepare the engine for elevated torque delivery after the engine connects to the driveline. At a time of connecting the engine to the driveline, the engine torque is transiently reduced to avert NVH issues related to engine speed overshooting or undershooting the target speed.

Abstract: A vehicular driving torque control apparatus, comprising: a limitation variation rate setting section included in a driving torque control section and configured to set, in a form of a limitation variation rate, a low torque side limitation variation rate used in a low torque side until the target driving torque reaches to a torque variation rate switching threshold value and a high torque side limitation variation rate used in a high torque side exceeding the torque variation rate switching threshold value and to execute a limitation suppression variation rate setting process in which the low torque side limitation variation rate is set to be larger than the high torque side limitation variation rate until the target driving torque reaches to the torque variation rate switching threshold value.

Abstract: A hybrid vehicle clutch control device includes an engine, a motor generator, a first clutch, a second clutch and at least one controller. The first clutch interrupts a torque transmission between the engine and the motor generator. The second clutch interrupts the torque transmission between the motor generator and driving wheels. The controller starts the engine using torque from the motor generator, when switching from an electric vehicle mode to a hybrid mode. When starting the engine accompanying an accelerator depression, the allocation of the transmission torque capacity of the second clutch is increased when the accelerator position opening amount is equal to or less than a predetermined accelerator position opening amount, as compared to when exceeding the predetermined accelerator position opening amount.

Abstract: An engine stop control method of a power split-parallel hybrid electric vehicle (HEV) system may include: determining any one driving mode among an EV mode, a power split mode and a parallel mode, corresponding to a driver's request; recognizing and deciding whether the driving mode is a mode required to stop an engine; stopping the engine; and performing kill torque (TQ) control on the revolution speed of the engine through a motor so that the revolution speed of the engine reaches 0 rpm. Accordingly, the revolution speed of the engine can be reduced down to an rpm lower than that of the conventional art, thereby promoting fast mode conversion.

Abstract: A motor vehicle transmission having main group and a range group that is connected downstream from the main group which has a planetary stage with transmission components. A first component couples an output shaft of the range group and a second component couples an output shaft of the main group. A third component can couple a housing and the first or the second components. For carrying out a range shift of the range group, which cannot be shifted under load, and to enable an arrangement of gear steps of the upstream main group, the drive output shaft passes axially through the planetary stage to the main group. The output shaft is a central shaft with which the input shaft of the main group can be connected in a rotationally fixed manner, and over which the output shaft of the main group is positioned as a coaxially extending hollow shaft.

Abstract: A power transmitting apparatus may include a first input shaft to selectively receive torque of an engine, a second input shaft having at least one input gear fixedly disposed thereon, a third input shaft having at least one input gear fixedly disposed thereon, a motor/generator operated as a motor or a generator, a planetary gear set including a first rotation element directly connected to the motor/generator, a second rotation element directly connected to the third input shaft, and a third rotation element directly connected to the first input shaft, a first speed output unit to convert torque input from the second input shaft or the third input shaft and output the converted torque, and a second speed output unit to convert torque input from the second input shaft or the third input shaft and output the converted torque.

Abstract: An industrial vehicle which is equipped with an engine and having an Eco-mode in which torque of the engine is restricted includes an accelerator, an accelerator opening detector that detects an opening of the accelerator, a vehicle speed detector that detects a speed of the vehicle, an engine speed detector that detects a speed of the engine, and a torque restriction releasing unit which, when the torque of the engine is restricted, if conditions that the opening of the accelerator detected by the accelerator opening detector is a first predetermined value or greater, that the vehicle speed detected by the vehicle speed detector is a second predetermined value or smaller and that the engine speed detected by the engine speed detector is a third predetermined value or smaller are satisfied, releases the torque restriction.

Abstract: In a drive system, a first differential mechanism transmits engine rotation, a second differential mechanism connects the first differential mechanism with drive wheels, and a switching device changes a speed ratio of the first differential mechanism. The second differential mechanism has first, second, and third rotational elements, which connect respectively to the first differential mechanism, a first rotating machine, and a second rotating machine. In a first running condition, the vehicle runs using the second rotating machine as a power source, while differentially operating the first differential mechanism. In a second running condition, the vehicle runs using the second rotating machine as a power source, without differentially operating the first differential mechanism. A region in which the vehicle runs in the second running condition in the case where the engine cannot start by itself is larger than that in the case where the engine can start by itself.

Abstract: A powertrain apparatus may include a planetary gear set including a first rotary member connected to a first motor and selectively operating as an input element or a fixing element, a second rotary member supplied with power from an engine and selectively operating as an input element, and a third rotary member connected to an output shaft and selectively operating as an output element, a second motor supplying power to a motor input shaft, and a transmission including a plurality of pairs of engaged gears forming different transmission gear ratios, the pairs of engaged gears being provided on the motor input shaft and the output shaft, respectively, with an engaging unit provided on the motor input shaft at a location between the pairs of engaged gears and selecting one of the pairs of engaged gears corresponding to a driving speed.

Abstract: A method for driving a hybrid vehicle with a propulsion system including a combustion engine, an electric machine with a rotor and a stator and a planetary gear with three components including a sun gear, a ring gear and a planet wheel carrier, where an output shaft of the combustion engine is connected to a first component, an input shaft of a gearbox is connected to a second component and the rotor of the electric machine is connected to a third component. The vehicle is driven forward by the electric machine. The reverse gear engaged in the gearbox drives the third component of the planetary gear to rotate with a negative rotational speed while a brake brakes the first component. Thereafter, move the component brake to an open position, so that the output shaft of the combustion engine rotates with a positive rotational speed so that the combustion engine may be started.

Abstract: A drive system for a hybrid vehicle includes an engine, a motor, a rotary shaft, an engine disconnect clutch, a motor disconnect clutch, an automatic transmission, and an electronic control unit. The electronic control unit is configured to, while either one of an engagement control and a rotation change control is being executed, when a request to execute the other one of the engagement control and the rotation change control has been issued, (a) delay a start timing of the other one of the engagement control and the rotation change control until execution of the one of the engagement control and the rotation change control is completed, and then (b) start execution of the other one of the engagement control and the rotation change control after execution of the one of the engagement control and the rotation change control has been completed.

Abstract: A drive assembly for a torque converter is provided. The drive assembly includes a spring retainer. The spring retainer includes at least one rounded portion contoured to wrap around an outer circumferential surface of at least one spring and an axial extension joined to the rounded portion. The axial extension extends axially away from rounded portion and includes a connecting portion for engaging a clutch plate. A torque converter and a method of forming a drive assembly for a torque converter are also provided.

Abstract: A system and method for operating a vehicle powertrain are described. In one example, a torque converter that has a variable K factor is adjusted to improve vehicle operation. The system and method may improve vehicle launch and vehicle operation at lower vehicle speeds.

Abstract: Systems and methods for improving operation of a hybrid vehicle are presented. In one example, torque demand of a driveline after a shift is forecast to determine if it is desirable to start the engine early so that engine torque is available after the shift. The approach may improve vehicle torque response.

Abstract: Systems and methods for cranking an engine of a hybrid vehicle that includes an electric machine to crank the engine and propel the vehicle are disclosed. In one example, engine cranking speed and engine cranking source are selected in response to vehicle operating conditions that may affect whether or not an electrical power source has sufficient energy to crank the engine.

Abstract: In a power generation control apparatus applied to a hybrid vehicle including a compound motor in which a wound rotor is connected to an internal combustion engine and a magnet rotor is connected to a transmission, when regenerative power generation is underway and the internal combustion engine is operative, a first motor/generator constituted by the wound rotor and the magnet rotor and the internal combustion engine are controlled such that torque output from the internal combustion engine is increased by torque applied to the internal combustion engine from the first motor/generator, and a power generation amount of a second motor/generator constituted by the magnet rotor and a stator is increased such that torque transmitted to an output shaft from the internal combustion engine is not applied to a drive wheel.