GTB GROUPE DE TRAVAIL “BRUXELLES 1952” WORKING PARTY “BRUSSELS 1952” Proposals by GTB and OICA on Regulations Nos. 6 and 48 Activation of a telltale, in.

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Presentation transcript:

GTB GROUPE DE TRAVAIL “BRUXELLES 1952” WORKING PARTY “BRUSSELS 1952” Proposals by GTB and OICA on Regulations Nos. 6 and 48 Activation of a telltale, in the event of malfunction of direction indicators equipped with multiple light sources Transmitted by the expert from GTB Informal document No. GRE (56 th GRE, 4-7 April 2006 agenda items 4.4. and 7.)

GTB GROUPE DE TRAVAIL “BRUXELLES 1952” WORKING PARTY “BRUSSELS 1952” Advantages of LED – direction indicators: improvement of visibility lifetime as vehicle (filament lamps are wear parts) reduce of wattage (fuel economy) Failure indication: not possible with detection of current variation because resistance varies in respect to temperature depends on wiring is contradictory to high reliability of the system

GTB GROUPE DE TRAVAIL “BRUXELLES 1952” WORKING PARTY “BRUSSELS 1952” DC/DC Converter 13,5V Each failure can be detected and indicated. Each failure of LED or electronic leads to a total breakdown of the system. Reliability of the DI-function is on a level with a one-filament-lamp-system. Series Connection

GTB GROUPE DE TRAVAIL “BRUXELLES 1952” WORKING PARTY “BRUSSELS 1952” Each failure can be detected and indicated, the whole series of LED fails after a failure of one LED. Problems: The lamp must comply when one light source has failed. Electronics for failure detection and wiring doubles price of LEDs for DI. FFF 13,5V Failure indication F: Failure detection electronic Parallel Connection in Groups

GTB GROUPE DE TRAVAIL “BRUXELLES 1952” WORKING PARTY “BRUSSELS 1952” 13,5V Failure indication When a second LED in a row fails it leads to an immediate break down of the third LED. This failure can be detected and indicated by the same means as used for a one filament lamp system. Matrix Connection

GTB GROUPE DE TRAVAIL “BRUXELLES 1952” WORKING PARTY “BRUSSELS 1952” ECE-R 6 Photometric ECE-R 6 photometric was created for a single filament lamp and one reflector system. GTB/OICA proposal ECE-TRANS-WP29-GRE to amend ECE-R 6 is based on this existing light distribution. This means that in 10° horizontal 35 % of light intensity is required. For failure indication the proposal requires 50% light intensity of HV as minimum.