System and method for vehicle coast control

Patent metadata

Field	Value
Publication number	US-11912263-B2
Application number	US-202016742204-A
Country	US
Kind code	B2
Filing date	Jan 14, 2020
Priority date	Jan 14, 2020
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

A method for controlling vehicle propulsion includes identifying at least one route characteristic of a portion of a route being traversed by a vehicle. The method further includes determining a profile for a target vehicle speed based on the at least one route characteristic and a vehicle energy consumption profile. The method further includes selectively adjusting a vehicle speed control input based on the target vehicle speed profile. The method further includes communicating the vehicle speed control input to a vehicle propulsion controller to achieve the target vehicle speed profile.

First claim

What is claimed is:

1. A method for controlling propulsion of a vehicle, the method comprising:
identifying at least one route characteristic of a portion of a route being traversed by the vehicle;
identifying a projected vehicle stop point or projected vehicle slowdown point associated with the portion of the route being traversed by the vehicle;
identifying at least one vehicle parameter using a velocity dependent resistance force of a road load function;
determining a vehicle energy consumption profile for the vehicle based on at least:
historical data indicating energy consumption of the vehicle for at least a portion of a route previously traversed by the vehicle having at least one route characteristic corresponding to the at least one route characteristic of the portion of the route being traversed by the vehicle;
the at least one vehicle parameter; and
a plurality of other vehicle parameters of the vehicle, wherein the plurality of other vehicle parameters includes at least a weight of the vehicle and manufacturer provided vehicle energy efficiency;

determining a target coast end speed based on the at least one route characteristic, the vehicle energy consumption profile, a rolling friction of the vehicle, a drag coefficient of the vehicle, and the projected vehicle stop point or projected vehicle slowdown point;
determining a target coast start point based on the at least one route characteristic and the target coast end speed; and
selectively controlling vehicle propulsion of the vehicle based on the target coast start point.

2. The method of claim 1 , wherein selectively controlling vehicle propulsion of the vehicle based on the target coast start point includes communicating a recommendation to an operator of the vehicle to begin coasting at the target coast start point.

3. The method of claim 2 , further comprising selectively adjusting the target coast end speed based on a user profile.

4. The method of claim 3 , further comprising:
adjusting the user profile based on a determination of whether the operator followed the recommendation.

5. The method of claim 4 , further comprising:
determining a learned operator behavior based on the user profile; and
adjusting the target coast end speed based on the learned operator behavior.

6. The method of claim 5 , further comprising updating the user profile based on determined current behavior of the operator.

7. The method of claim 1 , further comprising:
determining current behavior of an operator of the vehicle; and
adjusting the target coast end speed based on the current operator behavior.

8. The method of claim 1 , wherein the vehicle is selected from a group consisting of a semi-autonomous vehicle and an autonomous vehicle.

9. The method of claim 1 , further comprising:
generating a virtual input as a vehicle control input to a vehicle propulsion controller based on the target coast start point.

10. The method of claim 9 , wherein the vehicle propulsion controller includes an adaptive cruise control mechanism.

11. The method of claim 10 , wherein the virtual input includes a virtual lead vehicle.

12. The method of claim 9 , wherein the virtual input includes a virtual human machine interface signal.

13. An apparatus for controlling propulsion of a vehicle comprising:
a processor; and
a memory including instructions that, when executed by the processor, cause the processor to:
identify at least one route characteristic of a portion of a route being traversed by the vehicle;
identify a projected vehicle stop point or projected vehicle slowdown point associated with the portion of the route being traversed by the vehicle;
identity at least one vehicle parameter using a velocity dependent resistance force of a road load function;
determine a vehicle energy consumption profile for the vehicle based on at least:
historical data indicating energy consumption of the vehicle for at least a portion of a route previously traversed by the vehicle having at least one route characteristic corresponding to the at least one route characteristic of the portion of the route being traversed by the vehicle;
the at least one vehicle parameter; and
a plurality of other vehicle parameters of the vehicle, wherein the plurality of other vehicle parameters includes at least a weight of the vehicle and a manufacturer provided vehicle energy efficiency;

determine a target coast end speed based on the at least one route characteristic, the vehicle energy consumption profile, a rolling friction of the vehicle, a draft coefficient of the vehicle, and the projected vehicle stop point or projected vehicle slowdown point;
determine a target coast start point based on the at least one route characteristic and the target coast end speed; and
selectively control vehicle propulsion of the vehicle based on the target coast start point.

14. The apparatus of claim 13 , wherein the instructions to selectively control vehicle propulsion of the vehicle based on the target coast start point include communicating a recommendation to an operator of the vehicle to begin coasting at the target coast start point.

15. The apparatus of claim 14 , wherein the instructions further cause the processor to selectively adjust the target coast end speed based on a user profile.

16. The apparatus of claim 15 , wherein the instructions further cause the processor to adjust the user profile based on a determination of whether the operator followed the recommendation.

17. The apparatus of claim 16 , wherein the instructions further cause the processor to:
determine a learned operator behavior based on the user profile; and
adjust the target coast end speed based on the learned operator behavior.

18. The apparatus of claim 17 , wherein the instructions further cause the processor to:
update the user profile based on determined current behavior of the operator;
determine current operator behavior; and
adjust the target coast end speed based on the current operator behavior.

19. A non-transitory computer-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:
identifying at least one route characteristic of a portion of a route being traversed by a vehicle;
identifying a projected vehicle stop point or projected vehicle slowdown point associated with the portion of the route being traversed by the vehicle;
identifying at least one vehicle parameter using a velocity dependent resistance force of a road load function;
determining a vehicle energy consumption profile for the vehicle based on at least:
historical data indicating energy consumption of the vehicle for at least a portion of a route previously traversed by the vehicle having at least one route characteristic corresponding to the at least one route characteristic of the portion of the route being traversed by the vehicle;
the at least one vehicle parameter;
a plurality of other vehicle parameters of the vehicle, wherein the plurality of other vehicle parameters includes at least a weight of the vehicle and a manufacturer provided vehicle energy-, of the vehicle; and
historical data associated with at least one other vehicle for at least a portion of a route previously traversed by at the least one other vehicle having at least one route characteristic corresponding to the at least one route characteristic of the route being traversed by the vehicle;

determining a target coast end speed based on the at least one route characteristi

Assignees

• Delphi Tech Ip Ltd

Inventors

• Aggoune Karim
• Olin Peter M
• Zhu Zhaoxuan

Classifications

• B60W20/12 Primary

  using control strategies taking into account route information {(estimation or calculation of non-directly measurable driving parameters B60W40/00)} · CPC title

• B60W30/143

  Speed control (B60W30/16 takes precedence) · CPC title

• B60W30/18072 Primary

  Coasting · CPC title

• B60W40/09

  Driving style or behaviour · CPC title

• B60W30/16 Primary

  Control of distance between vehicles, e.g. keeping a distance to preceding vehicle · CPC title