System and method for changing driving modes using navigation and control

• US 10,203,031 B2
• Filed: 07/19/2016
• Issued: 02/12/2019
• Est. Priority Date: 07/19/2016
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Motor Engineering & Manufacturing North America Incorporated (Toyota Motor Corporation)
• Inventors: Gauthier, Christopher T.
• Primary Examiner(s): Hlavka, David J
• Application Number:
  US15/214,292
• Publication Number:
  US 20180023692A1
• Time in Patent Office: 938 Days
• CPC Class Codes: F16H 2059/663 Road slope
• CPC Class Codes: F16H 2059/666 Determining road conditions by using vehicle location or position, e.g. from global navigation systems [GPS]
• CPC Class Codes: F16H 2061/0223 Generating of new shift maps, i.e. methods for determining shift points for a schedule by taking into account driveline and vehicle conditions
• CPC Class Codes: F16H 2061/0227 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 Class Codes: F16H 59/44 dependent on machine speed of the machine, e.g. the vehicle
• CPC Class Codes: F16H 59/54 dependent on signals from the brakes, e.g. parking brakes
• CPC Class Codes: F16H 59/58 dependent on signals from the steering
• CPC Class Codes: F16H 59/66 Road conditions, e.g. slope, slippery
• CPC Class Codes: F16H 61/0213 characterised by the method for generating shift signals

Abstract

Methods, systems, and apparatus for automatically changing vehicle driving modes. An automatic shift control system includes a transmission configured to provide engine output for movement of the vehicle and a navigation unit configured to obtain navigational information including a current location of the vehicle. The automatic shift control system includes an electronic control unit (ECU) connected to the navigation unit. The ECU is configured to determine a current route having multiple segments based on the current location and a destination location and determine a shift schedule based on a driver behavior pattern. The ECU is configured to control the transmission to cause shifts of the transmission based on the shift schedule and the current location.

Claims

1. An automatic shift control system for a vehicle, comprising:

a transmission configured to provide an engine output for movement of the vehicle;

a navigation unit configured to obtain navigational information including a current location of the vehicle and a destination location; and

an electronic control unit (ECU) connected to the navigation unit, the ECU configured to;

determine a current route having a plurality of segments based on the current location and the destination location,

determine a shift schedule for the current route that includes a transmission shift command for each segment of the plurality of segments based on a driver behavior pattern, and

control the transmission to cause shifts of the transmission based on the shift schedule and the current location of the vehicle.

2. The automatic shift control system of claim 1, wherein to determine the shift schedule for the current route the ECU is further configured to match each segment of the current route to a corresponding previously-driven segment.

3. The automatic shift control system of claim 2, wherein to determine the shift schedule for the current route the ECU is further configured to determine each transmission shift command for each segment by associating each driver behavior pattern of the corresponding previously-driven segment with a driving mode.

4. The automatic shift control system of claim 1, further comprising:

one or more sensors configured to obtain a driver behavior pattern for each previously-driven segment of a plurality of previously-driven segments for a plurality of previously-driven routes; and

a memory configured to store each driver behavior pattern for each previously-driven segment of the plurality of previously-driven segments.

5. The automatic shift control system of claim 4, wherein each driver behavior pattern is further associated with a time of day and day of week of when the corresponding previously-driven segment of the previously-driven route was driven and the shift schedule is further based on a current time of day and day of week.

6. The automatic shift control system of claim 4, wherein each driver behavior pattern includes at least one of steering angle information, vehicle speed information, or braking information for the previously-driven segment.

7. The automatic shift control system of claim 1, further comprising:

one or more sensors configured to detect at least one of a road condition or a traffic condition for each segment of the plurality of segments; and

wherein the shift schedule is further based on the at least one of the road condition or the traffic condition for each segment.

8. The automatic shift control system of claim 7, wherein the road condition includes at least one of a grade level for each segment, a degree of curvature for each segment or an estimated cruising speed for each segment, wherein the traffic condition includes an estimated density of traffic for each segment.

9. The automatic shift control system of claim 1, wherein the each transmission shift command for each segment is a signal to the transmission to enter into a sport mode, a sport-plus mode, an economy mode, an economy-plus mode or a normal driving mode.

10. The method of claim 1, the ECU is further configured to:

collect a current driver behavior pattern associated with the current route; and

adjust the shift schedule based on the current driver behavior pattern.

11. A method for controlling an automatic transmission of a vehicle, the method comprising:

collecting and storing one or more driving modes for a plurality of previously-driven segments for a previously-driven route;

determining a route having a plurality of segments based on a current location of the vehicle and a destination location;

determining a driving mode for each segment of the plurality of segments based on the current location and the one or more driving modes for each corresponding previously-driven segment of the plurality of previously-driven segments; and

controlling operation of the vehicle while traveling each segment of the route based on the driving mode of for each segment.

12. The method of claim 11, wherein storing the one or more driving modes for the plurality of previously-driven segments further comprises:

associating the one or more driving modes to each previously-driven segment of the plurality of previously-driven segments; and

storing the association with each previously-driven segment.

13. The method of claim 12, further comprising:

determining that the vehicle is traveling each segment of the route based on the current location of the vehicle, a starting location of each segment, and the route.

14. The method of claim 13, wherein determining the driving mode for each segment further comprises:

identifying the corresponding previously-driven segment by matching the starting location and an ending location of each segment with a starting location and an ending location of one of the plurality of previously-driven segments, wherein the matched one of the plurality of previously-driven segments is the corresponding previously-driven segment.

15. The method of claim 12, wherein determining the driving mode of for each segment is further based on the association.

16. The method of claim 11, wherein controlling operation of the vehicle while traveling each segment of the route based on the driving mode for each segment includes adjusting the operation to maximize fuel efficiency or increase drivability of the vehicle.

17. A method for controlling a transmission of a vehicle, the method comprising:

obtaining navigational information including a current location of the vehicle and a destination location;

determining a route based on the current location and the destination location;

determining a plurality of segments for the route based on at least one of the navigational information or user input;

determining a shift schedule for the route, the shift schedule including a driving mode associated with a transmission shift command for each segment of the plurality of segments, the transmission shift command for each segment of the plurality of segments being based on additional user input.

18. The method of claim 17, wherein determining the plurality of segments for the route based on the navigational information further comprises:

analyzing road features of the route; and

segregating the route into the plurality of segments based on the analyzed road features.

19. The method of claim 17, wherein determining the plurality of segments for the route based on the user input further comprises:

receiving the user input that divides the route into the plurality of segments; and

segregating the route into the plurality of segments based on the received user input.

20. The method of claim of claim 19, wherein the additional user input includes a user selection of at least one of a sport mode, a sport plus mode, an economy mode, an economy-plus mode or a normal driving mode.