Hyundai Motor Company

Kia Corporation

Kia Motors Corporation

Huyndai Motor Company

Soo Bang Lee

Seul Gi Lee

Seong Ik Park

Jae Myoung Pi

Sang Kook Woo

Won Bin Lee

Sang Joon Kim

Gi Young Kwon

Hong Chul Shin

Hye Kil Hwang

Tai Jin Jung

Sang Don Lee

Hui Un Son

Sang Kyu Park

Kyoung Cheol Oh

Song Il Park

Kwon Chae Chung

Leehyoung Cho

Jong Bum Oh

Woo Suk Choi

Seung Wan Son

A hybrid electric vehicle includes an engine, a first motor directly connected to the engine, an engine clutch, a second motor selectively connected to the first motor through the engine clutch, a transmission directly connected to the second motor, a transmission controller configured to determine whether the transmission needs to be shifted, and a hybrid controller configured to compare a target torque reduction with intervention limits of the first and second motors when the engine clutch is in a locked-up state, to set torque reduction amounts of the engine, the first motor, and the second motor, respectively, and to output a torque command for controlling the torques of the engine, the first motor, and the second motor, respectively.

Hybrid electric vehicle and shift control method thereof

A shift control method of a hybrid electric vehicle includes: determining a speed control torque based on a result of comparing a speed of an input end of a transmission with a target speed of the input end of the transmission according to a shift signal; distributing the speed control torque to a second motor connected directly to the input end of the transmission; and distributing a residual speed control torque to a first motor connected selectively to the second motor through an engine clutch based on whether the engine clutch is locked up when the speed control torque is greater than a charging limit torque of the second motor.

Hybrid electric vehicle and a shift control method for same

A hybrid vehicle and a method of controlling the same, are configured for more efficiently distributing driving power for respective driving sources. The method of controlling a hybrid electric vehicle may include determining an engine operating point in a hybrid electric vehicle (HEV) mode, and determining first torque for a first motor and second torque for a second motor based on engine torque according to the engine operating point, required torque, and a speed of an input end of a transmission, the first motor may be directly connected to the engine, the second motor may be directly connected to the input end of the transmission, and the first motor and the second motor may be connected in the predetermined drive mode using driving power of the engine.

Hybrid electric vehicle and method of controlling the same

Disclosed are a backlash vibration reduction apparatus and method capable of sufficiently performing gear alignment even when torque is increased while a vehicle is driven within a low torque range, thereby minimizing rough vibration due to backlash. The backlash vibration reduction apparatus includes a correction determination unit configured to determine whether it is necessary to correct a torque gradient to be applied for an increase to target torque in the state in which the current torque of a vehicle is retained within a predetermined low torque range and a torque gradient correction unit configured to determine a corrected torque gradient in which a torque increase rate per hour is reduced and a torque increase time period is extended by multiplying a correction factor by a first torque gradient as a torque gradient that increases the current torque upon determining that it is necessary to correct the torque gradient.

Backlash vibration reduction apparatus and method

An embodiment acceleration limit control method includes determining an acceleration limit based on information on a passenger, determining a disturbance torque due to a disturbance, other than a drive source of a vehicle, based on at least a slope, determining a torque limit satisfying the acceleration limit based on the disturbance torque, and determining an output torque to be generated by the drive source based on the torque limit and a driver's requested torque.

Vehicle and acceleration limit control method therefor

In a hybrid electric vehicle, gear shifting delay and odd feeling when shifting gears, due to the accelerator pedal being depressed after an upshift being determined according to a release of the pedal, may be prevented. A method for controlling a transmission of the hybrid electric vehicle, includes determining a gear shifting type when a predetermined gear shifting condition is satisfied; determining an engine operation mode when the gear shifting type is power-off upshift; determining, when the engine operation mode is a predetermined mode according to an air-fuel ratio condition, a compensation value according to at least one of a motor speed, an under-charging-limit available motor torque, and an engine operation point in the predetermined mode; and applying the compensation value to an engine torque.

Hybrid electric vehicle and method of transmission control for the same

An apparatus and a method for controlling a driving mode of a vehicle are provided. The apparatus includes a mode converter that converts the driving mode of the vehicle based on an operation of a mode conversion input. When the driving mode is converted into a custom mode, a mode setting screen for adjusting a setting value of a driving characteristic preset is configured and the configured mode setting screen is displayed on a display of the vehicle. A tuning device then tunes a driving characteristic of the custom mode based on a setting value adjusted on the mode setting screen.

Apparatus and method for controlling driving mode of vehicle

A method for controlling a motor torque of a hybrid electric vehicle is provided. The method may include: detecting, with a controller, a downshift request during a regenerative braking; determining, with the controller, a target gear stage and a motor torque command, wherein the motor torque command is determined at a pre-shift stage before entering into a torque intervention; determining, with the controller, a motor torque command of the target gear stage; determining, with the controller, an intervention torque based on the motor torque command and the motor torque command of the target gear stage during a downshift control process; and controlling a torque intervention to control a regenerative operation of the motor based on the intervention torque, wherein determining the intervention torque includes changing the intervention torque from the motor torque command to a target value, which is set as the motor torque command of the target gear stage, during a shift control process.

Method for controlling a motor torque of a hybrid electric vehicle

An apparatus of estimating a vehicle weight may include: an acceleration detector detecting a longitudinal direction acceleration of the vehicle; a data detector detecting state data to estimate the vehicle weight; an engine clutch disposed between an engine and a drive motor and selectively connecting the engine to the drive motor; an integrated starter-generator for starting the engine and generating electric energy; and a vehicle controller calculating a basic vehicle weight based on an engine torque, a motor torque and the longitudinal direction acceleration detected by the acceleration detector. The vehicle controller estimates a final vehicle weight based on the basic vehicle weight and a predetermined weight when an estimating entrance condition is satisfied from the state data.

Apparatus of estimating vehicle weight and method using the same

A method of controlling a transmission device in a vehicle includes determining a basic shift pattern according to whether towing is performed and road inclination during vehicle driving, determining first energy consumption according to loads of operating devices in the vehicle, determining second energy consumption according vehicle speed and the road inclination, comparing the first and second energy consumptions and a state of charge (SoC) of a battery to determine an energy compensation pattern, and determining a last shift pattern so as to correspond to the basic shift pattern and the energy compensation pattern.

Method and apparatus for controlling transmission of vehicle

An apparatus and a method for controlling an engine clutch of a hybrid electric vehicle may include a driving information detector to detect demand information for driving and state information of the hybrid electric vehicle, an engine clutch selectively connecting an engine and a motor generating power, and a controller receiving information from the driving information detector and changing a driving mode of the hybrid electric vehicle by controlling an operation of the engine clutch, in which the controller controls standby hydraulic pressure of the engine clutch differently according to a mode changing condition when the driving mode of the hybrid electric is changed from an Electric Vehicle (EV) mode to a Hybrid Electric Vehicle (HEV) mode.

Apparatus and method for controlling engine clutch of hybrid electric vehicle

A method of controlling the shifting of gears in a TMED-type hybrid vehicle may include a stage in which, in a case where it is required that a power-on upshift operation is performed simultaneously when engagement of an engine clutch is carried out in order to convert the driving mode from an electric vehicle (EV) driving mode to hybrid-electric vehicle (HEV) driving mode, simultaneously performs the engagement of the engine clutch and the shift operation, thereby improving acceleration and shifting performances and providing a quick driving response for a driver.

Method of controlling shifting of gears in hybrid vehicle

A method and system for controlling a downshift for a hybrid vehicle includes: determining whether a running mode of the hybrid vehicle is an electric vehicle (EV) mode; determining whether a kick-down occurs when the hybrid vehicle is in the EV mode, wherein the kick-down requires a downshift; operating an engine and performing a shift-start (SS) when a downshift condition according to the kick-down is satisfied; determining whether a speed of the engine and a speed of a motor are synchronized before performing an actual shift-begin (SB); engaging an engine clutch when the speed of the engine and the speed of the motor are synchronized; and performing the actual SB when the engine clutch is engaged.

Growing community of inventors

Suwon-si, South Korea

Soo Bang Lee