System and method for controlling charging of hybrid vehicle

• US 9,387,755 B2
• Filed: 12/08/2014
• Issued: 07/12/2016
• Est. Priority Date: 09/23/2014
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kim, Sang-Jun
• Primary Examiner(s): MARC-COLEMAN, MARTHE Y
• Application Number:
  US14/562,969
• Publication Number:
  US 20160082945A1
• Time in Patent Office: 582 Days
• Field of Search: 701/22, 180/65.23, 180/65.27, 180/65.28, 180/65.285, 180/65.8, 903/918
• US Class Current: 1/1
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/442 Series-parallel switching type
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: B60W 20/40 Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers power-up or power-down of the driveline B60W30/192
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 30/18072 Coasting
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y10S 903/93 Conjoint control of different elements

Abstract

A method and system for controlling charging of a hybrid vehicle are provided. The method includes generating a request to charge a battery by driving a hybrid starter generator (HSG) with power of an engine in an electric vehicle (EV) mode of the hybrid vehicle. In addition, the method includes decreasing torque of the engine to HSG charging engine torque, maintaining the torque of the engine at the HSG charging engine torque, and shifting torque of the HSG into charging-target HSG torque. A pressure of a clutch disposed between the engine and a driving motor of the vehicle is released to interrupt transference of power from the engine to the driving motor. The battery is then charged with power output from the HSG while the HSG is rotating by driving power output from the engine.

Claims

1. A method for controlling charging of a hybrid vehicle, comprising:

generating, by a controller, a request to charge a battery by driving a hybrid starter generator (HSG) with power of an engine in an electric vehicle (EV) mode of the hybrid vehicle;

decreasing, by the controller, torque of the engine to HSG charging engine torque, maintaining the torque of the engine at the HSG charging engine torque, and shifting torque of the HSG into charging-target HSG torque;

releasing, by the controller, a pressure of a clutch disposed between the engine and a driving motor of the vehicle to interrupt transference of power from the engine to the driving motor;

charging, by the controller, the battery with power output from the HSG while the HSG is rotating by driving power output from the engine; and

confirming, by the controller, whether the pressure of the clutch has been released, after releasing the pressure the clutch,

wherein the generation of a request to charge a battery by driving a hybrid starter generator (HSG) with power of an engine in an electric vehicle (EV) mode of the hybrid vehicle is performed when state-of-charge (SOC) of the battery is lower than a preset value while the hybrid vehicle is traveling the EV mode,

wherein the charging the battery with power output from the HSG while the HSG is rotating by driving power output from the engine is performed when the pressure of the clutch has been released, and

wherein when the pressure of the clutch has not been released a return is performed to the release the pressure of the clutch to interrupt transference of power from the engine to the driving motor.

2. A system for controlling charging of a hybrid vehicle, comprising:

a memory configured to store program instructions; and

a processor configured to execute the program instructions, the program instructions when executed configured to;

generate a request to charge a battery by driving a hybrid starter generator (HSG) with power of an engine in an electric vehicle (EV) mode of the hybrid vehicle;

decrease torque of the engine to HSG charging engine torque, maintain the torque of the engine at the HSG charging engine torque, and shift torque of the HSG into charging-target HSG torque;

release a pressure of a clutch disposed between the engine and a driving motor of the vehicle to interrupt transference of power from the engine to the driving motor;

charge the battery with power output from the HSG while the HSG is rotating by driving power output from the engine; and

confirm whether the pressure of the clutch has been released, after releasing the pressure the clutch,

wherein the generation of a request to charge a battery by driving a hybrid starter generator (HSG) with power of an engine in an electric vehicle (EV) mode of the hybrid vehicle is performed when state-of-charge (SOC) of the battery is lower than a preset value while the hybrid vehicle is traveling the EV mode,

wherein the charging the battery with power output from the HSG while the HSG is rotating by driving power output from the engine is performed when the pressure of the clutch has been released, and

wherein when the pressure of the clutch has not been released a return is performed to the release the pressure of the clutch to interrupt transference of power from the engine to the driving motor.

3. A non-transitory computer readable medium containing program instructions executed by a controller, the computer readable medium comprising:

program instructions that generate a request to charge a battery by driving a hybrid starter generator (HSG) with power of an engine in an electric vehicle (EV) mode of the hybrid vehicle;

program instructions that decrease torque of the engine to HSG charging engine torque, maintain the torque of the engine at the HSG charging engine torque, and shift torque of the HSG into charging-target HSG torque;

program instructions that release a pressure of a clutch disposed between the engine and a driving motor of the vehicle to interrupt transference of power from the engine to the driving motor;

program instructions that charge the battery with power output from the HSG while the HSG is rotating by driving power output from the engine; and

program instructions that confirm whether the pressure of the clutch has been released, after releasing the pressure the clutch,

wherein the generation of a request to charge a battery by driving a hybrid starter generator (HSG) with power of an engine in an electric vehicle (EV) mode of the hybrid vehicle is performed when state-of-charge (SOC) of the battery is lower than a preset value while the hybrid vehicle is traveling the EV mode,

wherein the charging the battery with power output from the HSG while the HSG is rotating by driving power output from the engine is performed when the pressure of the clutch has been released, and

wherein when the pressure of the clutch has not been released a return is performed to the release the pressure of the clutch to interrupt transference of power from the engine to the driving motor.