Deceleration control for automatic automotive speed control apparatus
US6535808B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2001 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Dec 19, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2720/106
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A deceleration control for automotive vehicle speed control apparatus includes first and second memories storing values of closed and open loop deceleration commands, respectively, as functions of the desired vehicle deceleration rate signal. During commanded vehicle deceleration, closed loop brake command signals, derived from values of the closed loop deceleration command in the first memory, are provided to the vehicle braking system while the determined vehicle speed exceeds a transition threshold value; and, alternatively, open loop brake command signals derived from values of the open loop deceleration command in the second memory are provided to the vehicle braking system while the determined vehicle speed does not exceed the transition threshold value. The values in the first memory means are updated on the basis of deceleration error while the determined vehicle speed exceeds the transition threshold value. The values in the second memory means are updated on the basis of an error between the open loop brake command signal and the closed loop brake command signal while the determined vehicle speed exceeds the transition threshold value and are updated with a gain factor gr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.