Grade-compensated torque production to propel vehicle during one-pedal drive

Patent metadata

Field	Value
Publication number	US-11745737-B2
Application number	US-202017028067-A
Country	US
Kind code	B2
Filing date	Sep 22, 2020
Priority date	Sep 22, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A vehicle includes a powertrain and a controller. The controller, responsive to a parameter indicative of a grade on which the vehicle is travelling having a value greater than a threshold, and a given accelerator pedal input, commands the powertrain to produce an amount of drive torque for the vehicle that is based on the value.

First claim

What is claimed is:

1. A vehicle comprising:
a powertrain; and
a controller programmed to,
responsive to a speed of the vehicle being less than a speed threshold, a difference between an acceleration of the vehicle derived from a rotational speed sensor of the powertrain and an acceleration of the vehicle derived from an accelerometer being less than a difference threshold, and a given accelerator pedal input, command the powertrain to produce a first amount of drive torque for the vehicle that is not based on the difference, and
responsive to the speed being less than the speed threshold, the difference being greater than the difference threshold, and the given accelerator pedal input, command the powertrain to produce a second amount of drive torque for the vehicle that is based on the difference such that the first amount is less than the second amount when the vehicle is travelling uphill and the first amount is greater than the second amount when the vehicle is travelling downhill.

2. The vehicle of claim 1 , wherein the controller is further programmed to, responsive to the speed of the vehicle being greater than a second speed threshold and the given accelerator pedal input, command the powertrain to produce a third amount of drive torque that is not based on the difference, wherein the second speed threshold is greater than the first speed threshold.

3. The vehicle of claim 2 , wherein the controller is further programmed to, responsive to the speed of the vehicle being between the first and second speed thresholds, the difference being greater than the difference threshold, and the given accelerator pedal input, command the powertrain to produce a fourth amount of drive torque that is based on a portion of the difference proportional to a difference between the speed of the vehicle and the first or second speed threshold, wherein the second speed threshold is greater than the first speed threshold.

4. The vehicle of claim 1 , wherein the second amount of drive torque is further based on a tire radius of the vehicle.

5. The vehicle of claim 1 , wherein the second amount of drive torque is further based on a mass of the vehicle.

6. A method for controlling a vehicle including a powertrain, comprising:
by a controller,
responsive to a speed of the vehicle being less than a first speed threshold and a given accelerator pedal input, commanding the powertrain to produce a first amount of drive torque for the vehicle based on a difference between an acceleration of the vehicle derived from a rotational speed sensor of the powertrain and an acceleration of the vehicle derived from an accelerometer,
responsive to the speed of the vehicle being greater than a second speed threshold and the given accelerator pedal input, commanding the powertrain to produce a second amount of drive torque that is not based on the difference, wherein the second speed threshold is greater than the first speed threshold, and
responsive to the speed of the vehicle being between the first and second speed thresholds and the given accelerator pedal input, commanding the powertrain to produce a third amount of drive torque that is based on a portion of the difference proportional to a difference between the speed of the vehicle and the first or second speed threshold.

7. The method of claim 6 , wherein the first amount of drive torque is further based on a tire radius of the vehicle.

8. The vehicle of claim 6 , wherein the first amount of drive torque is further based on a mass of the vehicle.

9. A vehicle comprising:
a powertrain; and
a controller programmed to,
responsive to a difference between an acceleration of the vehicle derived from a rotational speed sensor of the powertrain and an acceleration derived from an accelerometer being greater than a difference threshold, and a given accelerator pedal input, command the powertrain to produce a first amount of drive torque for the vehicle that is based on the difference, and
responsive to the difference being less than the difference threshold, and the given accelerator pedal input, command the powertrain to produce a second amount of drive torque for the vehicle that is not based on the difference such that the first amount is greater than the second amount when the vehicle is travelling uphill and the first amount is less than the second amount when the vehicle is travelling downhill.

10. The vehicle of claim 9 , wherein the controller is further programmed to, responsive to the speed of the vehicle being greater than a speed threshold and the given accelerator pedal input, command the powertrain to produce a third amount of drive torque that is not based on the difference.

11. The vehicle of claim 9 , wherein the first amount of drive torque is further based on a tire radius of the vehicle.

12. The vehicle of claim 9 , wherein the first amount of drive torque is further based on a mass of the vehicle.

Assignees

• Ford Global Tech Llc

Inventors

• Bolger Bryan Michael
• Semenov Sergey Gennadievich

Classifications

• B60W30/143 Primary

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

• B60W2540/10

  Accelerator pedal position · CPC title

• B60W20/15 Primary

  Control strategies specially adapted for achieving a particular effect · CPC title

• B60W40/107 Primary

  Longitudinal acceleration · CPC title

• B60W40/105

  Speed · CPC title