Electrical connectors – With conduit or duct – Means to join conduit – duct or conductor sections
Reexamination Certificate
1999-10-14
2001-03-20
Bradley, Paula (Department: 2833)
Electrical connectors
With conduit or duct
Means to join conduit, duct or conductor sections
C439S213000, C174S0720TR
Reexamination Certificate
active
06203343
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a cabling arrangement intended for motorised vehicles or similar as described in the introduction to claim
1
. Such cabling arrangements, whose functioning is based on a system for transmitting data via a busbar, are known, as for example in the article “Neue Werkstoffe und Techniken für die Verkabelung im Automobil” [New materials and techniques for automotive cabling] by Reinhard Feigenhauer, published in the journal ATZ Automobiltechnische Zeitschrift 99 (1997), issue 3, pages 148 et seq.
The development of the cabling arrangement shown here derives from the need to make a substantial reduction in the number of individual cables in motorised vehicles, thereby reducing the weight of the cable bundle. It is estimated that when completely fitted out, a high-end car contains up to 80 servomotors and that the management of the monitoring and control functions of the motor and the various programs for vehicle stability and steering need an increasing number of sensors. The weight as such of a conventional cable bundle is therefore becoming a central problem and is holding back further technical development. For this reason, the idea was conceived of installing systems for the transmission of data via loop circuits, with each component possessing a multiplexed connection plug in order to collect from that component specific information or to send information along the loop. Such data transmission generally involves the use of currents of several tens of milliamps and a voltage in the region of 5 volts. Sensitivity to external interference and interference caused to the control signals carried in neighbouring cables are however a source of difficulty. In addition, the busbar systems described do not possess current supply lines for specific components as conventionally connected with lines carrying currents of 160 A at a voltage of 12V. The use of such a busbar already enables a considerable reduction to be made on the number of cables installed. The complete network is nevertheless complex and sensitive to electromagnetic interference.
BRIEF SUMMARY OF THE INVENTION
The present invention relates to a cabling arrangement for motorised vehicles or similar, enabling the cabling to be substantially simplified and its weight considerably reduced, with an accompanying significant reduction in sensitivity to electromagnetic interference.
This goal is attained using cabling in accordance with the claims. The preferred embodiments of the invention are described in the sub-claims.
The concept underlying the present invention involves the manufacture of power conductors and control conductors in the form of thin strips or sheets, arranged in a “sandwich” configuration and separated one from another by sheet material offering high insulation. This arrangement is advantageous compared with metal wires with an essentially round cross-section in that the busbar thus formed act as capacitors in a manner such that data transmission is protected from external interference.
Moreover, such busbar can be shaped with ease and lend themselves to easy fitting, which may also be automated. They offer, compared with the bundled cable systems described above, a weight saving which may attain one-third according to the model. Its rigid construction reduces the risk of confusing different connections and simplifies assembly.
The large conductor cross-section and the materials used combine to obviate any notable voltage fall along the busbar.
In addition, prior to assembly, the busbar may be ready-shaped to take account of the location at which they are to be fitted, following the contours of the chassis or the metalwork of the vehicle, with the result that an arrangement occupying very little space is possible.
REFERENCES:
patent: 3264403 (1966-08-01), Erdle
patent: 3400303 (1968-09-01), Rowlands
patent: 3476871 (1969-11-01), Erdle
patent: 4831278 (1989-05-01), Ueda et al.
patent: 5460530 (1995-10-01), Toba et al.
patent: 5745027 (1998-04-01), Malville
patent: 19649972 A1 (1998-05-01), None
patent: 2758432 (1998-07-01), None
patent: 19814350 A1 (1998-10-01), None
patent: WO 98/35856 (1998-08-01), None
“New Materials and Techniques for Automotive Cabling”, Feigenhauer, ATZ Automobiltechnische Zeitschrift 99, 1997, issue 3.
Chevassus-More Alain
Pernot Christian
Bradley Paula
Framatome Connectors International
Perman & Green LLP
Ta Tho D.
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