Vehicles, systems, and methods for shifting manual transmissions into neutral during autonomous braking

Patent metadata

Field	Value
Publication number	US-10196063-B2
Application number	US-201715627311-A
Country	US
Kind code	B2
Filing date	Jun 19, 2017
Priority date	Jun 19, 2017
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

Vehicles, systems, and methods for shifting a manual transmission into neutral during autonomous braking are provided. An exemplary system for shifting a vehicle into neutral during autonomous braking includes a manual transmission for transferring power from an engine to a differential using gears manually selected by a gear selector. Also, the system includes an actuator mounted to the vehicle and to the gear selector. Further, the system includes a controller coupled to the actuator and configured to direct the actuator to force the gear selector into neutral during an autonomous braking event.

First claim

What is claimed is:

1. A system for shifting a vehicle into neutral during autonomous braking, the system comprising:
a manual transmission for transferring power from an engine to a differential using gears manually selected by a gear selector;
an actuator mounted to the vehicle and to the gear selector; and
a controller coupled to the actuator and configured to direct the actuator to force the gear selector into neutral during an autonomous braking event.

2. The system of claim 1 wherein the gear selector includes a gear lever and a gear selector fork connected to the gear lever, wherein the actuator is connected to the gear lever.

3. The system of claim 1 wherein the gear selector includes a gear lever and a gear selector fork connected to the gear lever, wherein the actuator is connected to the gear selector fork.

4. The system of claim 1 wherein the actuator extends to force the gear selector into neutral during an autonomous braking event.

5. The system of claim 1 wherein the actuator contracts to force the gear selector into neutral during an autonomous braking event.

6. The system of claim 1 wherein the controller is configured to direct the actuator to force the gear selector into neutral when the engine is nearing a stall.

7. The system of claim 1 wherein the controller is configured to direct the actuator to force the gear selector from neutral back into a selected gear to cause the vehicle to stop.

8. The system of claim 1 further comprising an electric park brake, wherein the controller is configured to activate the electric park brake to cause the vehicle to stop.

9. A method for shifting a manual transmission of a vehicle into neutral during autonomous braking, the method comprising:
recognizing that autonomous braking is commanded;
determining that the vehicle is nearing a stall; and
forcing a gear selector into neutral position.

10. The method of claim 9 wherein forcing the gear selector into neutral position comprises directing an actuator to physically move the gear selector into the neutral position.

11. The method of claim 9 wherein determining that the vehicle is nearing a stall comprises monitoring engine speed, vehicle speed, current selected gear, and/or clutch engagement status.

12. The method of claim 9 further comprising:
after forcing the gear selector into neutral position, ascertaining that a driver is not controlling operation of the vehicle; and
causing the vehicle to stop.

13. The method of claim 12 wherein causing the vehicle to stop comprises forcing the gear selector from the neutral position into a selected gear.

14. The method of claim 12 wherein:
forcing the gear selector into neutral position comprises directing an actuator to physically move the gear selector into the neutral position; and
causing the vehicle to stop comprises directing the actuator to physically move the gear selector from the neutral position into a selected gear.

15. The method of claim 12 wherein causing the vehicle to stop comprises activating an electric park brake.

16. A vehicle capable of automatically shifting a manual transmission into neutral during autonomous braking, the vehicle comprising:
an automatic braking system;
an engine;
a differential, wherein the manual transmission is configured to transfer power from the engine to the differential using gears manually selected by a gear selector; and
an actuator for automatically shifting from a selected gear to neutral.

17. The vehicle of claim 16 wherein the actuator is physically coupled to the gear selector for forcing the gear selector into neutral during autonomous braking.

18. The vehicle of claim 16 further comprising a controller coupled to the actuator and configured to direct the actuator to shift from the selected gear to neutral.

19. The vehicle of claim 16 further comprising a controller coupled to the actuator and configured to recognize that autonomous braking is commanded, determine that the vehicle is nearing a stall, and direct the actuator to shift from the selected gear to neutral.

20. The vehicle of claim 16 further comprising a controller coupled to the actuator and configured to recognize that autonomous braking is commanded, determine that the vehicle is nearing a stall, direct the actuator to shift from the selected gear to neutral, and, direct the actuator to force the gear selector from neutral back into a selected gear to cause the vehicle to stop.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Zagorski Chad T
• Carpenter Michael G

Classifications

• F16H61/26 Primary

  Generation or transmission of movements for final actuating mechanisms · CPC title

• F16H59/54

  dependent on signals from the brakes, e.g. parking brakes · CPC title

• F16H2061/0234

  Adapting the ratios to special vehicle conditions · CPC title

• B60W2710/186

  Status of parking brakes · CPC title

• B60W2720/10

  Longitudinal speed · CPC title