Multiplex control system for memory seat or the like load
US4706194A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1985 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Dec 13, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/34239
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved control system is provided for controlling the variable characteristic associated with automotive peripheral devices, such as seats, mirrors, seat bladders or the like, having a "memory" capability. The control system avoids overloading a central controller and/or a data link between the central controller and the device being controlled, by approximating the "run" interval required to vary the relevant characteristic, i.e. seat position, from its present value to a target value recalled from memory. Pulses are generated by variations in the seat position and accumulated in a counter which may be separate from the central controller. At the completion of a "run" for the approximated interval, the accumulated count is used to update a count representative of the "present" seat position. The updated position is again compared to the target position and, if it differs by more than some acceptable tolerance, a new interval is determined and is "run". Provision may be made to compensate the determination of the interval for changes in the rate at which the seat responds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.