Electrified vehicle flat towing system and control
US12370901B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2023 |
| Grant date | Jul 29, 2025 |
| Priority date | — |
| Expiry date | Jan 30, 2044 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60L2220/42
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A flat towing technique for an electrified vehicle includes in response to a request for and during a flat towing operation, monitoring at least a back electromotive force (EMF) generated by an electric motor of the electrified powertrain, performing field weakening control of the electric motor such that the back EMF generated by the electric motor during the flat towing operation maintains a high voltage bus that powers the electric motor at a target voltage level, selectively isolating a high voltage battery system of the electrified powertrain from the high voltage bus based on a desired capacity of the high voltage battery system, and adjusting the target voltage level for the high voltage bus based on respective lower limits for electric motor speed and high voltage bus voltage and when the high voltage battery system is isolated from the high voltage bus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.