Electronic control unit for a vehicle
US7003382B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 2004 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Jul 22, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W50/0098
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In an electronic control unit for a vehicle, control data is stored in a volatile memory until a predetermined time passes after an ignition switch is turned off. This makes it possible to greatly reduce the frequency at which data is written into a nonvolatile memory. When the predetermined time has passed after the ignition switch is turned off, the control data stored in the volatile memory is written into the nonvolatile memory. Thereafter, the power supply from a power supply circuit to the volatile memory is stopped. Consequently, it is possible to store the control data reliably in either the volatile memory or the nonvolatile memory. It is also possible to reduce the dark current in the volatile memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.