Clutch control method for hybrid vehicle with dual clutch transmission

Patent metadata

Field	Value
Publication number	US-11325585-B2
Application number	US-201916384030-A
Country	US
Kind code	B2
Filing date	Apr 15, 2019
Priority date	Nov 23, 2018
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A clutch control method for a hybrid vehicle with a DCT is provided. The method includes determining an energy-saving possible period based on a selection state of shifting ranges, operation states of an accelerator pedal and a brake pedal, and the gradient of a road on which the vehicle is driven. An operation current is set for maintaining a clutch, which is configured to engage the first gear, engaged as 0 A in response to determining that a current state of the vehicle is in the energy-saving possible period.

First claim

What is claimed is:

1. A clutch control method for a hybrid vehicle with a dual clutch transmission (DCT), comprising:
detecting, by a controller, whether a current shifting range is a drive (D)-range;
detecting, by the controller, a gradient of a road on which the vehicle is driven and a driver's stop requirement; and
stopping, by the controller, an operation current that is supplied to a clutch actuator of a clutch that transmits power to a first gear in response to determining that a current shifting range is the D-range, that the gradient of the road does not require uphill driving, and detecting a driver's stop requirement.

2. The method of claim 1 , further comprising:
determining, by the controller, that the gradient of the road on which the vehicle is driven is a gradient that requires uphill driving when a signal value of an inclination angle sensor is greater than a predetermined first reference inclination angle;
determining, by the controller, that the gradient is a gradient that requires flat-ground driving when the signal value is the first reference inclination angle or less and is a second reference inclination angle or greater; and
determining, by the controller, that the gradient is a gradient that requires downhill driving when the signal value is less than the second reference inclination angle.

3. The method of claim 1 , further comprising:
detecting, by the controller, the driver's stop requirement when an accelerator pedal depression extent by a driver is a predetermined reference acceleration extent or less and a brake pedal depression extent is a predetermined braking extent or greater.

4. The method of claim 1 , wherein the clutch actuator of the clutch that transmits power to the first gear is an odd-numbered clutch actuator.

5. A clutch control method for a hybrid vehicle with a dual clutch transmission (DCT), comprising:
detecting, by a controller, an energy-saving possible period based on a selection state of shifting ranges, operation states of an accelerator pedal and a brake pedal, and a gradient of a road; and
setting, by the controller, an operation current for maintaining a clutch, which is configured to engage a first gear, as zero amperes in response to determining that a current state of the vehicle is in the energy-saving possible period.

6. The method of claim 5 , further comprising:
determining, by the controller, an operation state of an accelerator pedal based on a signal from an accelerator pedal sensor (APS);
determining, by the controller, an operation state of a brake pedal based on a signal from a brake pedal sensor (BPS); and
determining, by the controller, the gradient of the road based on a signal from an inclination angle sensor.

7. The method of claim 6 , further comprising:
detecting, by the controller, a driver's stop requirement based on the APS signal and the BPS signal.

8. The method of claim 7 , further comprising:
detecting, by the controller, a driver's stop requirement when the APS signal is a reference acceleration extent or less and the BPS signal is a reference braking extent or greater.

9. The method of claim 8 , further comprising:
detecting, by the controller, the energy-saving possible period in response to determining that a shifting range is a drive (D)-range, that the vehicle is not on an uphill road, and detecting the driver's stop requirement.

10. The method of claim 9 , further comprising:
detecting, by the controller, the energy-saving possible period when a vehicle speed is zero miles per hour in in addition to the shifting range, the driver's stop requirement, and the gradient of the road.

11. A clutch control system for a hybrid vehicle with a dual clutch transmission (DCT), comprising:
a memory configured to store program instructions; and
a processor configured to execute the program instructions, the program instructions when executed configured to:
detect whether a current shifting range is a drive (D)-range;
detect a gradient of a road on which the vehicle is driven and a driver's stop requirement; and
stop an operation current that is supplied to a clutch actuator of a clutch that transmits power to a first gear in response to determining that a current shifting range is the D-range, that the gradient of the road does not require uphill driving, and detecting a driver's stop requirement.

12. The clutch control system of claim 11 , wherein the program instructions when executed are further configured to:
determine that the gradient of the road on which the vehicle is driven is a gradient that requires uphill driving when a signal value of an inclination angle sensor is greater than a predetermined first reference inclination angle;
determine that the gradient is a gradient that requires flat-ground driving when the signal value is the first reference inclination angle or less and is a second reference inclination angle or greater; and
determine that the gradient is a gradient that requires downhill driving when the signal value is less than the second reference inclination angle.

13. The clutch control system of claim 11 , wherein the program instructions when executed are further configured to:
detect the driver's stop requirement when an accelerator pedal depression extent by a driver is a predetermined reference acceleration extent or less and a brake pedal depression extent is a predetermined braking extent or greater.

14. The clutch control system of claim 11 , wherein the clutch actuator of the clutch that transmits power to the first gear is an odd-numbered clutch actuator.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kwon Gi Young
• Hwang Kyung Hun
• Lee Kyung Taek
• Han Hoon
• Lim Hyun Woo
• Shin Dong Jun

Classifications

• F16D48/064 Primary

  Control of electrically or electromagnetically actuated clutches (F16D48/062, F16D48/068 take precedence) · CPC title

• B60W2552/15

  Road slope, i.e. the inclination of a road segment in the longitudinal direction · CPC title

• B60Y2300/18091

  Preparing for stopping · CPC title

• F16D2500/31426

  Brake pedal position · CPC title

• B60W2540/16

  Ratio selector position · CPC title