JPS6447143A - On-vehicle multiplex transmission equipment - Google Patents
On-vehicle multiplex transmission equipmentInfo
- Publication number
- JPS6447143A JPS6447143A JP20347587A JP20347587A JPS6447143A JP S6447143 A JPS6447143 A JP S6447143A JP 20347587 A JP20347587 A JP 20347587A JP 20347587 A JP20347587 A JP 20347587A JP S6447143 A JPS6447143 A JP S6447143A
- Authority
- JP
- Japan
- Prior art keywords
- car body
- multiplex transmission
- frequency
- capacitor
- short
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Small-Scale Networks (AREA)
- Selective Calling Equipment (AREA)
Abstract
PURPOSE:To prevent adverse effect at short-circuit between a signal line and a car body by connecting the earth side (negative wiring) of a power supply to the car body via a high frequency coupling means blocking the passing of current at a prescribed frequency or below. CONSTITUTION:The car body 28 is not utilized but +, - exclusive lines 17, 18 are provided and the negative terminal of the battery 21 is connected to ground with respect to the car body through a capacitor 26 and a resistor 27 connected in series. The capacitor 26 forms a high frequency coupling means to cut off the passing of current having a frequency smaller than a prescribed frequency fc. The frequency fs decided at a prescribed period for signal sequential transmission in the multiplex transmission system is sufficiently larger than the fc. Even when the + wiring 22 is short-circuited to the car body 28, the car body is floated in terms of DC and normal power supply is given to a multiplex terminal 15 or the like and normal multiplex transmission is implemented. Moreover, in case of short-circuit, the charging current of the capacitor is limited by the resistor 27 to prevent power fuse from being blown. The noise over the fc is shielded by the shield effect of time car body 28 and no effect is exerted on the multiplex transmission.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20347587A JPH0824293B2 (en) | 1987-08-18 | 1987-08-18 | Multiplex device for vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20347587A JPH0824293B2 (en) | 1987-08-18 | 1987-08-18 | Multiplex device for vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6447143A true JPS6447143A (en) | 1989-02-21 |
JPH0824293B2 JPH0824293B2 (en) | 1996-03-06 |
Family
ID=16474757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20347587A Expired - Lifetime JPH0824293B2 (en) | 1987-08-18 | 1987-08-18 | Multiplex device for vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0824293B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5479902A (en) * | 1993-08-02 | 1996-01-02 | Daimler-Benz Ag | Fuel injection system for a diesel engine |
US5605134A (en) * | 1995-04-13 | 1997-02-25 | Martin; Tiby M. | High pressure electronic common rail fuel injector and method of controlling a fuel injection event |
JP2008091981A (en) * | 2006-09-29 | 2008-04-17 | Hitachi Plant Technologies Ltd | Data transmission/reception system |
-
1987
- 1987-08-18 JP JP20347587A patent/JPH0824293B2/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5479902A (en) * | 1993-08-02 | 1996-01-02 | Daimler-Benz Ag | Fuel injection system for a diesel engine |
US5605134A (en) * | 1995-04-13 | 1997-02-25 | Martin; Tiby M. | High pressure electronic common rail fuel injector and method of controlling a fuel injection event |
JP2008091981A (en) * | 2006-09-29 | 2008-04-17 | Hitachi Plant Technologies Ltd | Data transmission/reception system |
Also Published As
Publication number | Publication date |
---|---|
JPH0824293B2 (en) | 1996-03-06 |
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