Apparatus and method for detecting running resistance of a vehicle
US5974353A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Jan 26, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/142
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A change amount .DELTA.TVO is computed as a deviation of a new value for the throttle opening representing engine load from a previous value. When the change amount .DELTA.TVO is greater than or equal to a positive judgment level TH and engine load is changing rapidly in an increasing direction, computation of running resistance using a detected value for the throttle opening is stopped. However, since when the throttle opening is stable or the throttle opening is changing reducingly, a necessary and sufficient computational accuracy can be maintained, computation of the running resistance is not stopped, and control is carried out based on the computational results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.