Multiplex wiring system using varying duration pulse width modulation
US5436897A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1992 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Apr 15, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R16/0315
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method and apparatus is used in a motor vehicle to serially communicate data between two or more communication nodes coupled to a data bus. Each communication node receives and transmits information on the data bus. Signals representative of operation of the vehicle are received directly by nodes and encoded for transmission to one or more other nodes via the data bus. The signals, which may for example originally be in parallel format, are encoded into serial digital data for data bus transmission. Each bit of the serial digital data is formatted into subbits of unequal duration. A designated module then receives and decodes the serial digital data for information or control purposes. Preferably the subbits progressively increase in duration with one working embodiment having three subbits of seven (7), eight (8) and nine (9) microseconds, respectively, to define a bit time of twenty four (24) microseconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.