In-vehicle apparatus
US8244425B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2009 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Nov 5, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W40/107
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A navigation apparatus carries out a diagnosing process for vehicle behavior, for example, whether sudden accelerating operation or sudden braking operation has been done, wherein the diagnosing process is carried out based on vehicle acceleration. It is necessary to accurately calculate the vehicle acceleration in order to perform a reliable diagnosing process. The navigation apparatus calculates a difference between a first vehicle acceleration defined by an output from an acceleration sensor and a second vehicle acceleration calculated based on a vehicle speed and vehicle angular speed. The navigation apparatus carries out the diagnosing process, for example, when the above difference between the first and second vehicle accelerations is less than a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.