System and method for controlling hybrid electric vehicle using driving tendency of driver

Patent metadata

Field	Value
Publication number	US-2016009271-A1
Application number	US-201414560182-A
Country	US
Kind code	A1
Filing date	Dec 4, 2014
Priority date	Jul 8, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

A system and method for controlling a hybrid electric vehicle using a driving tendency are provided. The method includes determining a driving tendency level based on data to determine a driving tendency of a driver and determining a target engine torque using an engine torque map based on a vehicle speed and a required torque. Whether the driving tendency level corresponds to a predetermined level is determined as well as whether the required torque is equal to or greater than a torque that corresponds to an optimal operating point of an engine when the driving tendency level corresponds to the predetermined level. The target engine torque is then adjusted when the required torque is equal to or greater than the torque that corresponds to the optimal operating point of the engine.

First claim

What is claimed is:

1 . A method for controlling a hybrid electric vehicle using a driving tendency, comprising:
determining, by a controller, a driving tendency level based on data to determine a driving tendency of a driver; determining, by the controller, a target engine torque using an engine torque map based on a vehicle speed and a required torque; determining, by the controller, whether the driving tendency level corresponds to a predetermined level; determining, by the controller, whether the required torque is equal to or greater than a torque that corresponds to an optimal operating point of an engine when the driving tendency level corresponds to the predetermined level; and adjusting, by the controller, the target engine torque when the required torque is equal to or greater than the torque that corresponds to the optimal operating point of the engine.

2 . The method for controlling a hybrid electric vehicle using a driving tendency of claim 1 , wherein in the adjustment of the target engine torque, the target engine torque is increased up to a part-load max torque of the engine to decrease a motor assist torque.

3 . The method for controlling a hybrid electric vehicle using a driving tendency of claim 1 , further comprising:
setting, by the controller, a final target engine torque to the torque that corresponds to the optimal operating point of the engine when the required torque is less than the torque that corresponds to the optimal operating point of the engine.

4 . A method for controlling a hybrid electric vehicle using a driving tendency, comprising:
determining, by the controller, a driving tendency level based on data to determine a driving tendency of a driver; determining, by the controller, whether an idle lock-up charge entering condition is satisfied; and performing, by the controller, an idle lock-up charge control when the idle lock-up charge entering condition is satisfied, wherein the idle lock-up charge entering condition is satisfied when an engine is in a driven state, the hybrid electric vehicle is in a coasting state, and an state of charge (SOC) of a battery is less than or equal to an idle lock-up charge entering SOC, and the idle lock-up charge entering SOC is set based on the driving tendency level.

5 . The method for controlling a hybrid electric vehicle using a driving tendency of claim 4 , wherein in the performing of the idle lock-up charge control, an engine clutch is maintained in an engaged state, and the battery is charged through electric power generation of a motor and an integrated starter and generator.

6 . The method for controlling a hybrid electric vehicle using a driving tendency of claim 4 , further comprising:
determining, by the controller, whether an idle lock-up charge release condition is satisfied; and releasing, by the controller, the idle lock-up charge control when the idle lock-up charge release condition is satisfied, wherein the idle lock-up charge release condition is satisfied when the coasting state is released or the SOC of the battery is equal to or greater than an idle lock-up charge release SOC, and the idle lock-up charge release SOC is set based on the driving tendency level.

7 . A method for controlling a hybrid electric vehicle using a driving tendency, comprising:
determining, by the controller, a driving tendency level based on data to determine a driving tendency of a driver; setting, by the controller, a shift pattern based on the driving tendency level; and performing, by the controller, a shift control based on the shift pattern.

8 . The method for controlling a hybrid electric vehicle using a driving tendency of claim 7 , wherein the driving tendency level is any one of a mild level, a normal level, an aggressive level, and a racer level, and the shift pattern is any one of a mild shift pattern that corresponds to the mild level, a normal shift pattern that corresponds to the normal level, an aggressive shift pattern that corresponds to the aggressive level, and a racer shift pattern that corresponds to the racer level.

9 . The method for controlling a hybrid electric vehicle using a driving tendency of claim 7 , further comprising:
setting, by the controller, a creep torque map based on the driving tendency level; and performing, by the controller, a creep torque control using the creep torque map based on a vehicle speed and a shift stage, wherein the shift stage is determined based on the shift pattern.

10 . A method for controlling a hybrid electric vehicle using a driving tendency, comprising:
determining, by the controller, a driving tendency level based on data to determine a driving tendency of a driver; determining, by the controller, whether an engine start condition is satisfied in a state in which an engine is stopped; and performing, by the controller, an engine start control when the engine start condition is satisfied, wherein the engine start condition is satisfied when power required by the driver is equal to or greater than a first threshold value, and the first threshold value is set based on the driving tendency level.

11 . The method for controlling a hybrid electric vehicle using a driving tendency of claim 10 , wherein the engine start condition is satisfied when accumulated driving energy is equal to or greater than a second threshold value, the accumulated driving energy is calculated based on required power during a predetermined time in a section in which a change rate of a position value of an accelerator pedal is a positive value, and the second threshold value is set based on the driving tendency level.

12 . The method for controlling a hybrid electric vehicle using a driving tendency of claim 10 , further comprising:
determining, by the controller, whether an engine stop condition is satisfied in a state in which the engine starts; and performing, by the controller, an engine stop control when the engine stop condition is satisfied, wherein the engine stop condition is satisfied when power required by the driver is less than or equal to a third threshold value, and the third threshold value is set based on the driving tendency level.

13 . A method for controlling a hybrid electric vehicle using a driving tendency, comprising:
a memory configured to store program instructions; and a processor configured to execute the program instructions, the program instructions when executed configured to:
determine a driving tendency level based on data to determine a driving tendency of a driver;
determine a target engine torque using an engine torque map based on a vehicle speed and a required torque;
determine whether the driving tendency level corresponds to a predetermined level;
determine whether the required torque is equal to or greater than a torque that corresponds to an optimal operating point of an engine when the driving tendency level corresponds to the predetermined level; and
adjust the target engine torque when the required torque is equal to or greater than the torque that corresponds to the optimal operating point of the engine.

14 . The system of claim 13 , wherein in the adjustment of the target engine torque, the target engine torque is increased up to a part-load max torque of the engine to decrease a motor assist torque.

15 . The system of claim 13 , wherein the program instructions when executed are further configured to:
set a final target engine torque to the torque that corresponds to the optimal operating point of the engine when the required torque is less than the torque that corresponds to the optimal operating p

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Choi Yongkak
• Han Hoon
• Park Ilkwon

Classifications

• B60K6/48 Primary

  Parallel type · CPC title

• F16H2061/0227

  Shift map selection, i.e. methods for controlling selection between different shift maps, e.g. to initiate switch to a map for up-hill driving · CPC title

• B60W30/18063

  Creeping · CPC title

• B60W2510/244

  Charge state · CPC title

• B60W10/08

  including control of electric propulsion units, e.g. motors or generators · CPC title