Hyundai Motor Company

Kia Motors Corporation

In Eok Cho

Il Kwon Park

Joonyoung Park

Hoon Hee Han

Yong Kak Choi

Chun Hyuk Lee

Jang Hyo Lee

Seong Ik Park

Jung Park

Seung Han Lee

Jeamun Lee

Yong Hoon Lee

Dong Su Ha

Jae Yun Shim

Jung Un An

Jeong Ho Seo

Dae Heung Lee

A state of charge (SOC) control method for improving fuel efficiency of a hybrid vehicle may include monitoring an SOC of a battery of the vehicle, determining, by a controller, a change rate in SOC reduction based on the monitored SOC, and performing, by the controller, SOC anti-reduction control based on the determined change rate in the SOC reduction.

SOC control method and apparatus for improving fuel efficiency of hybrid vehicle

A method of controlling a hybrid electric vehicle is provided. The method includes determining whether a condition for turning off an engine is satisfied and determining engine clutch disengaging time and residual purge gas consuming time from engine driving status information when the condition is satisfied. Engine clutch-engaged charging control time is determined from the engine clutch disengaging time and the residual purge gas consuming time. The method includes closing a purge control solenoid valve and starting to perform engine clutch-engaged charging control. The engine clutch-engaged charging control is maintained for the determined engine clutch-engaged charging control time and then engine clutch disengaging control is performed for the determined engine clutch disengaging time. The engine is stopped after the engine clutch disengaging control is performed.

Method and system of controlling hybrid electric vehicle for removing residual purge gas

An engine control method for heating of a hybrid electric vehicle, includes collecting information for air conditioning control by a sensor during an operation of a heating, ventilation, and air conditioning (HVAC) device in the hybrid electric vehicle in which forced engine driving for heating is performed, determining whether a condition that requires pre-engine driving as driving in a separate mode from forced engine driving is satisfied based on the collected information, upon determining that the condition that requires the pre-engine driving is required is satisfied, determining whether a condition for allowing the pre-engine driving is satisfied based on engine efficiency and hybrid system efficiency information, and upon determining that the condition for allowing the pre-engine driving is satisfied, performing the pre-engine driving for driving an engine to manage engine coolant temperature.

Engine control method for heating of hybrid electric vehicle

A method for controlling a hybrid vehicle having a motor and an engine includes: calculating a first startup reference value of the engine on the basis of requested power of the hybrid vehicle; measuring a current speed of the hybrid vehicle, and predicting a future speed of the hybrid vehicle; generating a compensation value needed to compensate for the first startup reference value of the engine on the basis of a difference between the current speed and the future speed of the hybrid vehicle; acquiring a second startup reference value of the engine by compensating for the first startup reference value on the basis of the compensation value; and controlling a startup operation of the engine according to the second startup reference value acquired through compensation.

Hybrid vehicle and method for controlling the same

An engine idle operation control method and system are provided to improve the fuel efficiency of a vehicle through maintenance of efficient battery SOC and charge control during the engine-on for heating of a vehicle. The method includes receiving an engine-on request for heating of the vehicle and determining a road condition. A target charge power is determined and set as a value corresponding to the road condition and battery state information. A basic idle RPM set as a value corresponding to the road condition, the target charge power, and the outdoor temperature is determined. A compensation RPM and a target idle RPM are determined by compensating for the basic idle RPM by the compensation RPM to adjust the engine idle driving into the determined target idle RPM during the heating of the vehicle.

Engine idle operation control method and system for heating of hybrid electric vehicle

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.

Method and apparatus for controlling engine start for hybrid electric vehicle

An engine control method of a hybrid vehicle for controlling the engine depending on an engine load of the hybrid vehicle includes: learning a change amount of an engine load; determining at least one engine torque depending on a magnitude of the engine load; calculating an optimum torque value by using the learned change amount of the engine load and at least one determined engine torque; and controlling the engine by using the calculated optimum torque value.

Engine control device and method of hybrid vehicle

An apparatus and a method are provided for controlling a mode change of a hybrid electric vehicle that change a mode of the hybrid electric vehicle at an optimal reference point of mode change when a demand power of a driver is stably maintained to be greater than a predetermined level. The method includes calculating a demand power or a demand torque of a driver and determining whether the demand power or the demand torque is maintained to be equal to or greater than a first predetermined value for a first predetermined time. A mode change hysteresis line is raised when the demand power or the demand torque is maintained to be equal to or greater than the first predetermined value for the first predetermined time and then a mode change is executed based on the raised mode change hysteresis line.

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Incheon, South Korea

In Eok Cho