Informal Document ACSF12 04 Korea Automobile Testing Research

Informal Document - ACSF-12 -04 Korea Automobile Testing & Research Institute Detecting Range to the Rear by ACSF system of Category C Korea Automobile Testing & Research Institute www. ts 2020. kr

Korea Automobile Testing & Research Institute A detecting range to the rear by ACSF Cat. C based on TTC S rear(m) = (TTC ⅹ Vsd) + Smin where : TTC(sec) = time to collision Vsd = Speed Difference = Vsmax - Vsmin Vsmax = the maximum speed up to which an ACSF is designed to operate Vsmin = the minimum speed down to which an ACSF is designed to operate Smin(m)= The length of main view mirror(=device) ~ the trailing edge of ACSF vehicle www. ts 2020. kr

Korea Automobile Testing & Research Institute A detecting range to the rear by ACSF Cat. C based on TTC <Option A> S rear(m) = (3. 5 ⅹ Vsd) + Smin S rear(m) = (2. 5 ⅹ Vsd) + Smin <Option B> www. ts 2020. kr

Korea Automobile Testing & Research Institute Factor background for the formula to the rear detecting(1) S rear(m) = (TTC ⅹ Vsd) + Smin where : Ø TTC(sec) = 3. 5* or 2. 5** * TTC of the highest performance(Type C) of types by target vehicle closing speed classification ** a half completed time of L. C as we are agreed(ACSF-11 -03 -Rev. 2 para. 5. 6. 4. 1. 6), whatever is lower - M 1, N 1 : 5 sec, M 2, M 3, N 2 : 10 sec [ ISO 17387 Lane change decision aid systems(LCDAS)-Performance Requirement and test procedures ] www. ts 2020. kr

Korea Automobile Testing & Research Institute Factor background for the formula to the rear detecting(2) Ø Vsd(=Vsmax – Vsmin) : speed range specified by the vehicle manufacturer of Cat. C. That is, the monitoring range should also be increased if operating speed range increases Ø Smin(m)= The length of main view mirror(=device) ~ the trailing edge of ACSF vehicle * TTC*Vsd Smin VUT www. ts 2020. kr

Korea Automobile Testing & Research Institute Calculation example ■ TTC = 3. 5/2. 5 sec, Vsd = 70 km/h(operating speed range) Condition * In case of Germany, the recommended max. speed limit = 130 km/h, the min. speed limit = 60 km/h on highway ** if the length of Main view mirror ~ the trailing edge of ACSF vehicle : M 1 = 3. 2 m(Chrysler 300 c), N 3 = 10. 8 m(Volvo FM cargo), Smin(m) = 3. 2 m(M 1), 10. 8 m(N 3) ☞ 130 km/h(200 km/h) If TTC = 3. 5 sec, Srear = 71. 3 m(M 1), Srear = 78. 9 m(N 3) If TTC = 2. 5 sec, Srear = 51. 8 m(M 1), Srear = 59. 4 m(N 3) VUT 60 km/h(130 km/h) www. ts 2020. kr

Korea Automobile Testing & Research Institute Detecting Range(m) by Speed difference(operating range) Monitoring distance by operating range 90 78, 9 70 71, 3 60 50 40 30 20 10 0 Monitoring Distance(m) 80 10, 8 69, 1 59, 4 49, 7 20, 5 17, 7 12, 9 10, 1 40, 0 42, 1 38, 6 30, 2 32, 4 31, 6 31, 0 24, 7 22, 6 24, 0 51, 8 52, 5 45, 5 44, 9 10, 0 TTC 3. 5(M 1) 59, 4 51, 8 TTC 2. 5(N 3) TTC 2. 5(M 1) 37, 9 17, 1 3, 2 0, 0 61, 5 TTC 3. 5(N 3) 20, 0 30, 0 40, 0 50, 0 Speed Difference(km/h) 60, 0 70, 0 www. ts 2020. kr

Korea Automobile Testing & Research Institute A detecting range to the rear by ACSF Cat. C based on TTC ? Option A ? Option B ? www. ts 2020. kr