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Commission Regulation (EC) No 631/2009Show full title

Commission Regulation (EC) No 631/2009 of 22 July 2009 laying down detailed rules for the implementation of Annex I to Regulation (EC) No 78/2009 of the European Parliament and of the Council on the type-approval of motor vehicles with regard to the protection of pedestrians and other vulnerable road users, amending Directive 2007/46/EC and repealing Directives 2003/102/EC and 2005/66/EC

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7.2.Test 2: For activation of BASU.K.

7.2.1.Once an emergency braking condition has been detected, systems sensitive to pedal force shall show a significant increase in the ratio of:U.K.
  • brake line pressure to brake pedal force, where permitted by point 7.2.5 or

  • vehicle deceleration to brake pedal force.

7.2.2.The performance requirements for a Category ‘A’ BAS are met if a specific brake application characteristic can be defined that exhibits a decrease of between 40 % and 80 % in required brake pedal force for (FABS — FT) compared to (FABS extrapolated — FT).U.K.
7.2.3.FT and aT are threshold force and threshold deceleration as shown in Figure 1. The values of FT and aT shall be supplied to the Technical Service at the time of submission of the type-approval application. The value of aT shall be between 3,5m/s2 and 5,0m/s2.U.K.
7.2.4.A straight line is drawn from the origin through the point FT, aT (as shown in Figure 1a). The value of brake pedal force ‘F’, at the point of intersection between this line and a horizontal line defined by a = aABS, is defined as FABS, extrapolated:U.K.
7.2.5.

As an alternative, which can be selected by the manufacturer, in the case of vehicles of GVM > 2 500 kg of category N1, or M1 derived from those N1 vehicles, the pedal force figures for FT, FABS,min, FABS,max and FABS,extrapolated may be derived from the brake line pressure response characteristic instead of the vehicle deceleration characteristic. This shall be measured as the brake pedal force is increasing.U.K.

7.2.5.1.The pressure, at which ABS cycling commences, shall be determined by making five tests from 100 ± 2 km/h in which the brake pedal is applied up to the level which produces ABS operation and the five pressures at which this occurs as determined from front wheel pressure records, shall be recorded and the mean value obtained as pabs.U.K.
7.2.5.2.The threshold pressure PT shall be stated by the manufacturer and correspond to a deceleration in the range of 2,5–4,5 m/s2.U.K.
7.2.5.3.Figure 1b shall be constructed in the manner set out in point 7.2.4 but using line pressure measurements to define the parameters set out in point 7.2.5 above where:U.K.

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