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Commission Delegated Regulation (EU) 2015/68Show full title
Commission Delegated Regulation (EU) 2015/68 of 15 October 2014 supplementing Regulation (EU) No 167/2013 of the European Parliament and of the Council with regard to vehicle braking requirements for the approval of agricultural and forestry vehicles (Text with EEA relevance)
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- Revised 09/06/20182.16 MB
- Revised 14/10/20162.17 MB
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7. Tests and measurements to be carried out on the brakes
7.1.Brakes and components submitted to the Technical Service conducting the tests shall be tested for conformity with the requirements of point 6.
7.2.The following should be determined:
7.2.1.
The minimum brake-shoe lift (minimum brake-shoe application travel), 2sB*;
7.2.2.
The brake-shoe centre lift (brake-shoe application travel) 2sB (which shall be greater than 2sB*);
7.3.In the case of mechanical brakes, the following shall be determined:
7.3.1.
Reduction ratio ig (see Figure 4 of Appendix 1);
7.3.2.
Force P* for braking torque M*;
7.3.3.
Torque M* as a function of the force P* applied to the control lever in mechanical-transmission systems.
The rotational speed of the braking surfaces shall correspond to an initial vehicle speed of 30 km/h in the case of Class C1 vehicle, 40 km/h in the case of Class C2 vehicle, 60 km/h in the case of Class C3 vehicle, when the towed vehicle moves forward and 6 km/h when the towed vehicle moves rearward. The following shall be derived from the curve obtained from these measurements (see Figure 6 of Appendix 1):
7.3.3.1.
The brake-retraction force Po and the characteristic value ρ when the trailer moves forward;
7.3.3.2.
The brake-retraction force Por and the characteristic value ρr when the towed vehicle moves rearward;
7.3.3.3.
Maximum braking torque Mr up to the maximum permissible travel sr when the towed vehicle moves rearward (see Figure 6 of Appendix 1);
7.3.3.4.
Maximum permissible travel at the brake control lever when the towed vehicle moves rearward (see Figure 6 of Appendix 1).
7.4.In the case of hydraulic brakes, the following shall be determined:
7.4.1.
Reduction ratio ig′ (see Figure 8 of Appendix 1)
7.4.2.
Pressure p* for braking torque M*
7.4.3.
Torque M* as a function of the pressure p* applied to the brake cylinder in hydraulic transmission systems.
The rotational speed of the braking surfaces shall correspond to an initial vehicle speed of 30 km/h in the case of Class C1 vehicle, 40 km/h in the case of Class C2 vehicle, 60 km/h in the case of Class C3 vehicle, when the towed vehicle moves forward and 6 km/h when the towed vehicle moves rearward. The following shall be derived from the curve obtained from these measurements (see Figure 7 of Appendix 1):
7.4.3.1.
The retraction pressure po and the characteristic ρ′ when the towed vehicle moves forward;
7.4.3.2.
The retraction pressure por and the characteristic ρ′r when the towed vehicle moves rearward;
7.4.3.3.
Maximum braking torque Mr up to the maximum permissible fluid volume Vr when the towed vehicle moves rearward (see Figure 7 of Appendix 1);
7.4.3.4.
Maximum permissible fluid volume Vr absorbed by one braking wheel when the towed vehicle moves rearward (see Figure 7 of Appendix 1).
7.4.4.
Surface area FRZ of the piston in the brake cylinder.
7.5.Alternative procedure for the Type-I test
7.5.1.The Type-I test according to Annex II, point 2.3 does not have to be carried out on a vehicle submitted for type approval, if the braking system components are tested on an inertia test bench to meet the prescriptions of Annex II, points 2.3.2 and 2.3.3.
7.5.2.The alternative procedure for the Type-I test shall be carried out in accordance with the provisions laid down in Annex VII, Appendix 1, point 3.5.2 (in analogy also applicable for disc brakes).
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