Method for checking a capacity of a supply line

Patent metadata

Field	Value
Publication number	US-2021033657-A1
Application number	US-202016909547-A
Country	US
Kind code	A1
Filing date	Jun 23, 2020
Priority date	Jul 30, 2019
Publication date	Feb 4, 2021
Grant date	—

Abstract

A method for checking a capacity of at least one supply line for an electrically operated assembly that is coupled electrically via the at least one supply line to an electrical system of an at least partially automated mobile platform. The method includes: ensuring a non-critical operating state of the mobile platform; determining an off-load terminal voltage at an input connection of the assembly, with zero-current supply line; applying a defined current to the supply line of the electrically operated assembly; determining an on-load terminal voltage at the input connection of the assembly, in doing so, the defined voltage being applied to the supply line of the electrically operated assembly; determining a differential voltage between the off-load terminal voltage and the on-load terminal voltage; comparing the differential voltage to a differential-voltage limit value to determine whether the capacity of the electric supply line is sufficient to operate the assembly.

First claim

What is claimed is:

1 . A method for checking a capacity of at least one supply line for an electrically operated assembly that is coupled electrically via the at least one supply line to an electrical system of an at least partially automated mobile platform, comprising the following steps:
ensuring a non-critical operating state of the mobile platform; determining an off-load terminal voltage at an input connection of the electrically operated assembly, with the supply line currentless; applying a defined current to the supply line of the electrically operated assembly; determining an on-load terminal voltage at the input connection of the electrically operated assembly while the defined current is being applied to the supply line of the electrically operated assembly; determining a differential voltage between the off-load terminal voltage and the on-load terminal voltage; and comparing the differential voltage to a differential-voltage limit value to determine whether the capacity of the supply line is sufficient to operate the electrically operated assembly.

2 . The method as recited in claim 1 , wherein the defined current is applied using the electrically operated assembly, and the assembly is driven in a test mode with pulsed currents without causing an outward mechanical effect.

3 . The method as recited in claim 1 , wherein the electrically operated assembly is a service brake of the mobile platform, and the defined current is applied to the supply line of the electrically operated service brake by operating the service brake with activation of a braking functionality of the mobile platform.

4 . The method as recited in claim 1 , wherein the electrically operated assembly is a service brake of the mobile platform, and the defined current is applied to the supply line of the electrically operated service brake by operating the service brake in order to build up pressure in the brake hydraulics of the mobile platform.

5 . The method as recited in claim 1 , wherein the capacity is checked prior to a planned maneuver of the at least partially automated platform, and the non-critical state of the mobile platform is ensured using an electrically activated parking brake of the mobile platform.

6 . The method as recited in claim 1 , wherein the check is carried out prior to a planned maneuver of the at least partially automated mobile platform, and the non-critical state of the mobile platform is ensured using an electrically activated locking pawl of an automatic transmission of the mobile platform.

7 . The method as recited in claim 5 , wherein the planned maneuver is aborted by not deactivating the electrically activated parking brake when the capacity of the supply line has been determined to be insufficient for operation of the electrically operated assembly.

8 . The method as recited in claim 6 , wherein the planned maneuver is aborted by not deactivating the electrically activated locking pawl, when the capacity of the electric supply line has been determined to be insufficient for operation of the assembly.

9 . The method as recited in claim 5 , wherein the electrically activated parking brake is released when the check has determined that the capacity of the electric supply line is sufficient to operate the service brake, and the service brake has built up a defined pressure in the brake hydraulics or the activation of a braking functionality was successful.

10 . The method as recited in claim 6 , wherein the electrically activated locking pawl of the automatic transmission is released when the check has determined that the capacity of the electric supply line is sufficient to operate the service brake, and the service brake has built up a defined pressure in the brake hydraulics or the activation of a braking functionality was successful.

11 . The method as recited in claim 1 , wherein: (i) based on the comparison of the differential voltage to the differential-voltage limit value, a control signal is provided for controlling the at least partially automated vehicle, and/or (ii) based on the comparison of the differential voltage to the differential-voltage limit value, a warning signal is made available to warn a vehicle occupant.

12 . A device configured to check a capacity of at least one supply line for an electrically operated assembly that is coupled electrically via the at least one supply line to an electrical system of an at least partially automated mobile platform, the device configured to:
ensure a non-critical operating state of the mobile platform; determine an off-load terminal voltage at an input connection of the electrically operated assembly, with the supply line currentless; apply a defined current to the supply line of the electrically operated assembly; determine an on-load terminal voltage at the input connection of the electrically operated assembly while the defined current is being applied to the supply line of the electrically operated assembly; determine a differential voltage between the off-load terminal voltage and the on-load terminal voltage; and compare the differential voltage to a differential-voltage limit value to determine whether the capacity of the supply line is sufficient to operate the electrically operated assembly.

13 . A non-transitory machine-readable storage medium on which is stored a computer program for checking a capacity of at least one supply line for an electrically operated assembly that is coupled electrically via the at least one supply line to an electrical system of an at least partially automated mobile platform, the computer program, when executed by a computer, causing the computer to perform the following steps:
ensuring a non-critical operating state of the mobile platform; determining an off-load terminal voltage at an input connection of the electrically operated assembly, with the supply line currentless; applying a defined current to the supply line of the electrically operated assembly; determining an on-load terminal voltage at the input connection of the electrically operated assembly while the defined current is being applied to the supply line of the electrically operated assembly; determining a differential voltage between the off-load terminal voltage and the on-load terminal voltage; and comparing the differential voltage to a differential-voltage limit value to determine whether the capacity of the supply line is sufficient to operate the electrically operated assembly.

Assignees

• Bosch Gmbh Robert

Inventors

• Schwab Christian
• Suelzle Helmut

Classifications

• G01M17/00

  Testing of vehicles (testing fluid tightness G01M3/00; testing elastic properties of bodies or chassis, e.g. torsion-testing, G01M5/00; testing alignment of vehicle headlight devices G01M11/06; testing of engines G01M15/00) · CPC title

• G01R17/00

  Measuring arrangements involving comparison with a reference value, e.g. bridge · CPC title

• G01R31/66 Primary

  Testing of connections, e.g. of plugs or non-disconnectable joints (testing for incorrect line connections G01R31/55) · CPC title

• B60T17/22 Primary

  Devices for monitoring or checking brake systems; Signal devices · CPC title

• B60T2201/10

  Automatic or semi-automatic parking aid systems · CPC title