Modular Vehicle Combinations | Session 5 | 26-27 Oct 2015
Brussels
Agenda Item 6.1.2.
Power supply dimensioning

Does any potential / practical issue exist with ISO 7638 dimensioning (UN R13 paragraph 5.2.2.17.2. also to be reviewed)?

Mr. Adam presented the Part 2 of his contribution per document MVC-05-02.

The experts had a debate on the trends of power consumptions: EBS decreased the levels of current, while the forthcoming electric steering function may increase the necessary power. Need to note that the draft amendments to take into account ACS connectors (7638).

There was a debate on whether to limit the current generated to the other vehicles. It was suggested to inspire from what was adopted by the task-force on trailer electric steering system.
Other approach: any trailer intended for MVC should benefit of a certain amount of current, hence in-use requirements that depending the level of current available at tractor, a certain number of trailers is permitted.

What consumes the most current: self-check, braking on slippery surface, number of valves?

Proposal to put labels on the vehicles about compatibility of different vehicles. Yet it was recalled that this solution should be avoided due to the poor durability of the labels.

Conclusion:
CLEPA to collect real-world data on the levels of electricity consumers (how many amps necessary for one average trailer).
Volvo to investigate internally (seems to be 25 Amps available to the trailer)

Documentation
MVC-05-02 CLEPA input concerning draft amendments to UN R55 related to modular vehicle combinations (CLEPA and WABCO)