Abstract: The present invention provides a control method for a hybrid electric vehicle According to a control method of the present invention, the fuel efficiency is improved by extending a fuel cut operation in a wider transmission range and the impact caused by the extended fuel cut operation is reduced by reaction control of a motor operating in the opposite direction to engine torque.

Abstract: A method for controlling engine torque of a hybrid electric vehicle with an electronic throttle control when an engine is restarted after an idle-stop state includes: transmitting torque restriction information to an engine control unit, outputting a restricted torque from the engine control unit using the torque restriction information, transmitting an input torque of the engine to a continuously variable transmission by a clutch operation according to a control of the engine control unit, and supplying a clutch control hydraulic pressure based on the input torque.

Abstract: A method for controlling an idle stop mode in a hybrid electric vehicle includes performing an engine RPM lift-up control to raise an engine RPM if a deceleration is less than a medium deceleration when a speed of a hybrid electric vehicle reaches an idle stop mode entering speed such that as the engine RPM is raised, a gear changing oil pressure is increased, so that a continuously variable transmission (CVT) gear ratio according to a deceleration reaches a target minimum gear ratio, and as the CVT gear ratio reaches the target minimum gear ratio, entering an idle stop mode even when a deceleration is less than a medium deceleration while a transmission control unit (TCU) does not perform a control operation for preventing an idle stop mode from being entered.

Abstract: The present invention provides a control method for a hybrid electric vehicle According to a control method of the present invention, the fuel efficiency is improved by extending a fuel cut operation in a wider transmission range and the impact caused by the extended fuel cut operation is reduced by reaction control of a motor operating in the opposite direction to engine torque.

Abstract: A method for controlling an idle stop mode in a hybrid electric vehicle is disclosed. The control method accords an oil pressure drain time that a continuously variable transmission clutch oil pressure is fully drained, a final off time of an engine, and a final control time of a motor when a hybrid electric vehicle enters an idle stop mode, thereby preventing a shock or shaking of the vehicle.

Abstract: A method for controlling an idle stop mode in a hybrid electric vehicle is disclosed. The method for controlling the idle stop mode includes: performing an engine RPM lift-up control to raise an engine RPM if a deceleration is less than a medium deceleration when a speed of a hybrid electric vehicle reaches an idle stop mode entering speed such that as the engine RPM is raised, a gear changing oil pressure is increased, so that a continuously variable transmission (CVT) gear ratio according to a deceleration reaches a target minimum gear ratio; and as the CVT gear ratio reaches the target minimum gear ratio, entering an idle stop mode even when a deceleration is less than a medium deceleration while a transmission control unit (TCU) does not perform a control operation for preventing an idle stop mode from being entered.

Abstract: A method for controlling engine torque of a hybrid electric vehicle with an electronic throttle control when an engine is restarted after an idle-stop state includes: transmitting torque restriction information to an engine control unit, outputting a restricted torque from the engine control unit using the torque restriction information, transmitting an input torque of the engine to a continuously variable transmission by a clutch operation according to a control of the engine control unit, and supplying a clutch control hydraulic pressure based on the input torque.

Abstract: A method of controlling electric power generation during idle charge in a hybrid electric vehicle. The method includes determining whether an idle charge condition is satisfied; if the idle charge condition is satisfied, calculating a first charge power amount based on whether a load is applied, a gear shift position, and a state of charge of a battery; calculating a target charge speed based on the first charge power amount; calculating an altitude correction coefficient based on atmospheric pressure; calculating a second charge power amount based on the altitude correction coefficient and the first charge power amount; and controlling an amount of power generation and an amount of battery charge based on the second charge power amount.

Abstract: A method of controlling an air conditioner in a hybrid car includes the steps of operating a blower at a low level after initial startup, controlling the blower for a predetermined time during idle-stop, maintaining a compressor duty to zero, and activating an air conditioner indicator during idle-stop. In the step of controlling a blower for a predetermined time during idle-stop, an operation mode may be automatically switched from a fresh mode to a recycle mode.

Abstract: A method for controlling charge and discharge amounts of a main battery for a hybrid car includes receiving signals from the main battery, a driving motor, and an inverter system; and controlling charge and discharge amounts of the main battery through adjusting and learning a scale factor of the main battery in conformity with a driver's driving pattern so that a state of charge is administrated in a normal zone. A system for controlling charge and discharge amounts of a main battery for a hybrid car includes a main battery; a driving motor; an inverter system; and a hybrid control unit receiving signals from the battery, motor, and inverter system, and controlling charge and discharge amounts of the main battery through adjusting and learning a scale factor of the main battery in conformity with a driver's driving pattern so that a state of charge is administrated in a normal zone.

Abstract: Controlling regenerative braking of front and rear motors of a four wheel drive electric vehicle equipped with front and rear motors and a manual transmission having a clutch, based on whether the clutch is engaged or not.

Abstract: Controlling regenerative braking of front and rear motors of a four wheel drive electric vehicle equipped with front an rear motors and a manual transmission having a clutch, based on whether the clutch is engaged or not.