Patent US4270153A successfully refreshed from Google Patents.
Patent US4825362A successfully refreshed from Google Patents.
US4825362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Network system for data communication in a vehicle
Assignee: Denso Corp
•
Filing: 1986-12-29
•
Granted: 1989-04-25
•
Expires: 2006-12-29
Abstract
Abstract A data network system for a vehicle having a plurality of separate and distinct control computers carrying out a predetermined control function of the vehicle and a data communication line for communicating data among the control computers. One of the control computers determines the number of the other computers which are linked with the data communication line, and in response to that number a data transfer rate output from each of the control computers to the data communication line is determined.
Inventors
- 👤 Kazuaki Minami
- 👤 Yuji Hirabayashi
- 👤 Katsuhiro Ina
- 👤 Katsunori Ito
- 👤 Susumu Akiyama
- 👤 Hidemichi Tanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:30
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/403; B; B60; B60R; B60R16/00; B60R16/02; B60R16/03; B60R16/0315; H04L2012/40267; H04L2012/40273
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
185 words
A data network system for a vehicle having a plurality of separate and distinct control computers carrying out a predetermined control function of said vehicle, comprising: data communication means for communicating data among said control computers; a master computer, which is one of said control computers, for setting a polling time interval and polling each of said other control computers at said polling time interval to discriminate whether each of said polled computers responds or not; determination means, provided in said master computer, for determining the number of polled computers which are linked with said data communication means in response to the result of said discrimination by said master computer; and setting means, provided in all said control computers, in response to a command signal from said master computer indicative of the volume of data that must be transferred as a result of said determined number of said polled computers for setting a data transfer speed between each control computer and said data communication means wherein said master computer further sets said polling time interval in response to said determined number of said polled computers.
Claim 2
Dependent Claim
185 words
A data network system for a vehicle having a plurality of separate and distinct control computers carrying out a predetermined control function of said vehicle, comprising: data communication means for communicating data among said control computers; a master computer, which is one of said control computers, for setting a polling time interval and polling each of said other control computers at said polling time interval to discriminate whether each of said polled computers responds or not; determination means, provided in said master computer, for determining the number of polled computers which are linked with said data communication means in response to the result of said discrimination by said master computer; and setting means, provided in all said control computers, in response to a command signal from said master computer indicative of the volume of data that must be transferred as a result of said determined number of said polled computers for setting a data transfer speed between each control computer and said data communication means wherein said master computer further sets said polling time interval in response to said determined number of said polled computers.
Claim 3
Dependent Claim
30 words
A data network system as claimed in claim 1, wherein said determination means comprises means for counting a number of the computers which are linked with said data communication means.
Claim 4
Dependent Claim
31 words
A data network system as claimed in claim 2, wherein said counting means increments by a predetermined number corresponding to each type of control computer connected with said data communication means.
Claim 5
Dependent Claim
19 words
A data network system as claimed in claim 1, wherein said data communication means incudes a serial communication line.
References Cited (Backward Citations)
US3676858A
Cited
US4003032A
Cited
US4344132A
Cited
US4344132B1
Cited
US4558429A
Cited
US4638476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |