Abstract: An apparatus and a method for controlling an engine stop of a hybrid electric vehicle are provided to charge the vehicle by advancing control completion time for the engine stop and using inertial energy of the engine. The method includes determining a sensing speed for executing the engine stop when required and determining a value of control timeout based on the sensing speed. A torque is applied to an HSG based on the sensing speed and the value of control timeout is compared with a counter value when the sensing speed is equal to or greater than a predetermined speed. The counter value is increased when the counter value is equal to or less than the value of control timeout. The sensing speed is redetermined, the torque application to the HSG is stopped and the counter value is reset when the counter value is greater than the control timeout value.

Abstract: An apparatus and a method for controlling a driving mode of an HEV are provided. The apparatus releases an HEV mode at an appropriate time before forcibly releasing an engine clutch even when an accelerator pedal is engaged while driving the vehicle on an uphill road in the HEV mode to reduce a shock caused when the engine clutch is forcibly disengaged and improve riding comfort and drivability. The method includes determining whether the vehicle is driven on an uphill road from gradient information of a current road while the vehicle is driven in a HEV mode and determining a clutch engagement impossible speed corresponding to the gradient of the current road when the vehicle is driven on the uphill road. The engine clutch is disengaged to release the HEV mode when the speed of the motor is equal to or less than the determined clutch engagement impossible speed.

Abstract: A method and an apparatus for controlling engine start for a hybrid electric vehicle are provided. The apparatus includes a data detector that is configured to detect data for controlling start of an engine. Additionally, a controller is configured to calculate a demand power of a driver based on the data and start the engine when the demand power of the driver is greater than an engine-on power line which is a reference for starting the engine.

Abstract: An apparatus and method for controlling an engine stop of a hybrid electric vehicle provides an efficient torque in the operation of a hybrid starter generator, by applying a torque of a high efficiency point of the hybrid starter generator according to a drop of engine RPM when the engine is stopped, so as to improve fuel efficiency of a vehicle and damping vibration of the vehicle when the engine is stopped, by generating a negative torque on the hybrid starter generator side in accordance with the drop of the engine RPM when the engine is stopped, and by applying a torque of the point that gives the maximum charging power of the battery through the generated negative torque.

Abstract: A shift control system and method of a hybrid vehicle are provided and controlled by dualizing a brake shift pattern based on whether an engine clutch release is possible when a hybrid vehicle brake is engaged. The system includes a hybrid controller that is configured to detect whether engine clutch release is possible, based on battery state information and input data from a operation. In addition, a shift controller is configured to execute a gear shift by a brake shift pattern based on whether the engine clutch release is possible.

Abstract: 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.

Abstract: A control method and system are provided for preventing a motor from overheating when a TMED hybrid vehicle is driven to thus improve driving performance by operating an engine before limiting motor output based on a driving state while the vehicle is driven in an EV mode, and the current temperature of the motor. The method includes monitoring a motor temperature of a hybrid vehicle and operating an engine when the current motor temperature of the motor is a first motor temperature or greater when the vehicle is driven in an EV mode. In addition, motor output is limited when the current motor temperature is equal to or greater than a third motor temperature, which is greater than the first motor temperature, after the engine is operated.

Abstract: A system and method for opening an engine clutch of a hybrid vehicle are provided. The method and system enhance fuel efficiency by saving a fuel injection amount based on a fuel injection time of an engine, by adjusting an input torque of an engine clutch to be zero by applying a Hybrid Starter Generator (HSG) torque connected to the engine while reducing the fuel injection time into the engine from the time when the opening of the engine clutch starts to adjust.

Abstract: A system and method for opening an engine clutch of a hybrid vehicle are provided. The method and system enhance fuel efficiency by saving a fuel injection amount based on a fuel injection time of an engine, by adjusting an input torque of an engine clutch to be zero using an HSG torque connected to the engine while reducing the fuel injection time into the engine from the time when the opening of the engine clutch starts to adjust.

Abstract: A control system of a hybrid vehicle includes: an engine that generates power by burning fuel; a driving motor that assists the power from the engine by generating power using electricity supplied from a battery; an integrated starter-generator that starts the engine and charges the battery by operating selectively as a power generator; an atmospheric sensor that measures the atmospheric pressure; a temperature sensor that measures the temperature of intake air flowing into the engine; and a controller that calculates a control factor, using the atmospheric pressure measured by the atmospheric sensor and the temperature of intake air measured by the temperature sensor, and adjusts a State of Charge (SOC) charge band between an SOC where charging the battery is started and an SOC where a hybrid vehicle runs in a charge mode, in accordance with the magnitude of the control mode.

Abstract: A control apparatus of a hybrid electric vehicle includes: a clutch provided between an engine and a motor generating power; a transmission serially connected to the motor; a driving information detector detecting driving information including an output speed of the motor, an output speed of the transmission, and a rotation speed of a driving shaft serially connected to the transmission; and a controller limiting an input torque of the motor or an input speed of the motor to a predetermined level or less when a difference between the output speed of the motor and the output speed of the transmission detected by the driving information detector is higher than a predetermined value. As a result, it is possible to prevent a hybrid electric vehicle from starting at an unwanted speed.

Abstract: A shift control system and method of a hybrid vehicle are provided and controlled by dualizing a brake shift pattern based on whether an engine clutch release is possible when a hybrid vehicle brake is engaged. The system includes a hybrid controller that is configured to detect whether engine clutch release is possible, based on battery state information and input data from a operation. In addition, a shift controller is configured to execute a gear shift by a brake shift pattern based on whether the engine clutch release is possible.

Abstract: A power transmission system for a hybrid vehicle including an engine, a first planetary gearset and a second planetary gear set is provided. In particular, the first planetary gearset includes a plurality of first rotational elements, one of which is coupled with an output shaft of the engine and one of which is coupled with a first motor generator, and two of which are allowed to be directly selectively connected directly by a clutch. The second planetary gearset includes a plurality of second rotational elements, one of which is permanently coupled with one of the first rotational elements of the first planetary gearset, one of which is coupled with a second motor generator and one of which is connected directly with drive unit.

Abstract: A control apparatus of a hybrid electric vehicle includes: a clutch provided between an engine and a motor generating power; a transmission serially connected to the motor; a driving information detector detecting driving information including an output speed of the motor, an output speed of the transmission, and a rotation speed of a driving shaft serially connected to the transmission; and a controller limiting an input torque of the motor or an input speed of the motor to a predetermined level or less when a difference between the output speed of the motor and the output speed of the transmission detected by the driving information detector is higher than a predetermined value. As a result, it is possible to prevent a hybrid electric vehicle from starting at an unwanted speed.

Abstract: 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.

Abstract: Disclosed is a control system and method for controlling starting of an engine in a hybrid vehicle. More specifically, a controller is implemented that confirms first and second brake and the first and second clutch are released so that the system is in a neutral condition, confirm that the engine is stopped, and control the first motor-generator and the second motor-generator to rotate the engine at a predetermined rotational speed to start the engine.

Abstract: A power transmission system for a hybrid vehicle including an engine, a first planetary gearset and a second planetary gear set is provided. In particular, the first planetary gearset includes a plurality of first rotational elements, one of which is coupled with an output shaft of the engine and one of which is coupled with a first motor generator, and two of which are allowed to be directly selectively connected directly by a clutch. The second planetary gearset includes a plurality of second rotational elements, one of which is permanently coupled with one of the first rotational elements of the first planetary gearset, one of which is coupled with a second motor generator and one of which is connected directly with drive unit.

Abstract: A control method of a hybrid vehicle that includes engages a second clutch and in response outputs a torque through an output shaft that is connected to the second carrier via torque supplied from an engine and a first and second motor-generators. Accordingly, the speed of the engine is controlled via the first motor-generator, and a torque of an output shaft is control via the second motor-generator. Accordingly, the second motor-generator is used to control an operating point of the engine so that a base motor torque is effectively set.

Abstract: A control method of a hybrid vehicle that includes engages a second clutch and in response outputs a torque through an output shaft that is connected to the second carrier via torque supplied from an engine and a first and second motor-generators. Accordingly, the speed of the engine is controlled via the first motor-generator, and a torque of an output shaft is control via the second motor-generator. Accordingly, the second motor-generator is used to control an operating point of the engine so that a base motor torque is effectively set.

Abstract: A control method of a hybrid vehicle that includes engages a second clutch and in response outputs a torque through an output shaft that is connected to the second carrier via torque supplied from an engine and a first and second motor-generators. Accordingly, the speed of the engine is controlled via the first motor-generator, and a torque of an output shaft is control via the second motor-generator. Accordingly, the second motor-generator is used to control an operating point of the engine so that a base motor torque is effectively set.