Computer-implemented method of controlling future braking capacity of a vehicle travelling along a road

Patent metadata

Field	Value
Publication number	US-2024123833-A1
Application number	US-202318478356-A
Country	US
Kind code	A1
Filing date	Sep 29, 2023
Priority date	Oct 17, 2022
Publication date	Apr 18, 2024
Grant date	—

Abstract

A computer-implemented method of controlling future braking capacity of a vehicle travelling along a road, the vehicle having onboard batteries that are configured to absorb energy from regenerative braking. The method comprises acquiring prediction data indicative of how much braking capacity will be needed for the vehicle in an upcoming downhill slope in which a regenerative braking event is anticipated; controlling, based on the acquired prediction data, the application of resistor brakes of the vehicle before said upcoming downhill slope, thereby increasing the propulsion power needed to propel the vehicle at maintained speed, and controlling a traction motor of the vehicle so that the vehicle is propelled at maintained speed while the resistor brakes are applied, thereby reducing the state of charge (SOC) of the onboard batteries and enabling the onboard batteries to subsequently absorb energy from said anticipated regenerative braking event.

First claim

What is claimed is:

1 . A computer-implemented method of controlling future braking capacity of a vehicle travelling along a road, the vehicle having onboard batteries that are configured to absorb energy from regenerative braking, the method comprising:
acquiring, by a processor device of a computer system, prediction data indicative of how much braking capacity will be needed for the vehicle in an upcoming downhill slope in which a regenerative braking event is anticipated; controlling, by the processor device, based on the acquired prediction data, the application of resistor brakes of the vehicle before said upcoming downhill slope, thereby increasing the propulsion power needed to propel the vehicle at maintained speed; and controlling, by the processor device, a traction motor of the vehicle so that the vehicle is propelled at maintained speed while the resistor brakes are applied, thereby reducing the state of charge (SOC) of the onboard batteries and enabling the onboard batteries to subsequently absorb energy from said anticipated regenerative braking event.

2 . The computer system comprising the processor device configured to perform the method of claim 1 .

3 . The method of claim 1 , further comprising:
determining, by the processor device, a target SOC of the onboard batteries based on the acquired prediction data; and stopping, by the processor device, said application of resistor brakes when said target SOC has been reached for the onboard batteries.

4 . The method of claim 3 , wherein the acquired prediction data comprises a value of an expected amount of energy that the onboard batteries would absorb during the anticipated regenerative braking event in the upcoming downhill slope assuming unlimited battery capacity.

5 . The method of claim 3 , wherein the acquired prediction data comprises an expected future reduction in SOC due to an uphill climb before said upcoming downhill slope, assuming the applying of the regenerative brakes has been stopped.

6 . The method of claim 3 , further comprising determining, by the processor device, based on said determined target SOC, at least one of the following parameters:
a point in time for starting said application of resistor brakes; a location along the road for starting said application of resistor brakes; and a value of braking power, energy or torque to be applied by said resistor brakes.

7 . The method of claim 6 , wherein said determining of the at least one parameter comprises:
determining, by the processor device, the current speed of the vehicle; and based on the determined current speed of the vehicle, determining, by the processor device, the at least one parameter.

8 . The method of claim 6 , wherein said determining of the at least one parameter comprises:
determining, by the processor device, the current state of charge of the vehicle; and based on the determined current state of charge, determining, by the processor device, the at least one parameter.

9 . The method of claim 6 , wherein said determining of the at least one parameter comprises:
accessing, by the processor device, stored historical control data representing previous control actions by the processor device; and based on said stored historical control data, determining, by the processor device, the at least one parameter.

10 . The method of claim 1 , wherein said prediction data comprises information about the topography of an upcoming road segment which comprises said upcoming downhill slope, wherein said information about the topography comprises information such as a length and/or an inclination of said upcoming downhill slope.

11 . The method of claim 1 , wherein, in said prediction data, said brake capacity that will be needed for the vehicle in the downhill slope includes, assuming SOC is expected to reach 100% due to the anticipated regenerative braking event in the downhill slope:
an expected value of a brake torque, power or energy to be applied by mechanical brakes of the vehicle in the downhill slope following said anticipated regenerative braking; and/or an expected value of energy to be dumped into the resistive brakes following said anticipated regenerative braking.

12 . The method of claim 1 , wherein said vehicle is a fuel cell electric vehicle (FCEV), a battery electric vehicle (BEV) or a hybrid vehicle.

13 . A vehicle comprising the processor device to perform the method of claim 1 .

14 . A computer program product comprising program code for performing, when executed by the processor device, the method of claim 1 .

15 . A control system comprising one or more control units configured to perform the method according to claim 1 .

16 . A non-transitory computer-readable storage medium comprising instructions, which when executed by the processor device, cause the processor device to perform the method of claim 1 .

Assignees

• Volvo Truck Corp

Inventors

• Stjernberg Oscar
• Wilhelmsson Martin

Classifications

• B60L7/18 Primary

  Controlling the braking effect (B60L7/12, B60L7/14, B60L7/16 take precedence) · CPC title

• B60L50/60

  using power supplied by batteries (in combination with fuel cells B60L50/75) · CPC title

• B60L58/10

  for monitoring or controlling batteries · CPC title

• B60L15/2018 Primary

  for braking on a slope · CPC title

• B60L58/15

  Preventing overcharging · CPC title