the trailer and the mean fully ?ss developed deceleration of the tractor/trailer combination (trailer laden ?ss and unladen) ?aa8G ?aa1N T ?aaT R ?aaN ?Ð P ?aaT R ?aaN ?Ð 0,8 0,7 0,6 0,5 0,4 0,3 0,2 0,1 0 1,0 2,0 3,0 4,0 5,0 5,5 5,9 6,0 7,0 ?aa8G ?aeNL single-axle and multi-axle trailers single-axle trailers multi-axle trailers ?aa8K ?aa2L (BLK0)ABREV N (BLK0)INDIC TYPE="SUF o /(BLK0)INDIC
/(BLK0)ABREV
tes:
?aa6W ?aa0G 1. ?aa3L Limits indicated in the diagram refer to laden and unladen trailers. ?ss When the trailer unladen mass exceeds 75 % of its maximum mass, limits ?ss shall be applied only to (BLK0)QT ?aa3S laden /(BLK0)QT
?aa4S conditions.
?aa2W ?aa3R 2. ?aa3L Limits indicated in the diagram do not affect the provisions of this ?ss Annex regarding the minimum braking performances required. However, ?ss if braking performances obtained during test - in accordance with ?ss provisions indicated in item 3.4 above - are greater than those requested, ?ss do not exceed the limits indicated in the above diagram.
?aa2W ?aa3R T ?aaT R ?aaN ?aa4L = ?aa3L sum of braking forces at periphery of all wheels of trailer.
?aa2W ?aa7R P ?aaT R ?aaN ?aa4L = ?aa3L total normal static reaction of road surface on wheels of trailer.
?aa2W ?aa7R J ?aa4L = ?aa3L mean fullydeveloped deceleration of tractor/trailer combination.
END OF GRAPHIC
() ANNEX XII: INERTIA DYNAMOMETER TEST METHOD FOR BRAKE LININGS 1.GENERAL 1.1.The procedure described in this Annex may be applied in the event of a modification of vehicle-type resulting from the fitting of brake linings of another type to vehicles which have been approved in accordance with this Directive.
1.2.The alternative types of brake linings shall be checked by comparing their performance with that obtained from the brake linings with which the vehicle was equipped at the time of approval and conforming to the components identified in the relevant information document, a model of which is given in Annex IX.
1.3.The technical authority responsible for conducting approval tests may at its discretion require comparison of the performance of the brake linings to be carried out in accordance with the relevant provisions contained in Annex II.
1.4.Application for approval by comparison shall be made by the vehicle manufacturer or by his duly accredited representative.
1.5.In the context of this Annex vehicle shall mean the vehicle-type approved according to this Directive and for which it is requested that the comparison shall be considered satisfactory.
2.TEST EQUIPMENT 2.1.A dynamometer having the following characteristics shall be used:
2.1.1.it shall be capable of generating the inertia required by item 3.1 of this Annex, and have the capacity to meet the requirements prescribed by items 1.3 and 1.4 of Annex II with respect to Type I and II fade tests;
2.1.2.the brakes fitted shall be identical with those of the original vehicle-type concerned;
2.1.3.air cooling, if provided, shall be in accordance with item 3.4 of this Annex;
2.1.4.the instrumentation for the test shall be capable of providing at least the following data: