1. VW 370 Optical Feasibility
Optic Department

2. General View LB Reflector Bulbshield Eyebrow Bezel Wing Bezel
HB-DRL Reflector
Lens
Black Bezel
Side Marker
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3. High Beam H15, in Lower Part Reflector
Feasibility study
Low Beam H7
TL909 is fulfilled
Golf A6 fulfilled
ECE : R112B is fulfilled
USA : FMVSS108 could be fulfilled.
High Beam H15, in Lower Part Reflector
Golf A6 is fulfilled
USA : FMVSS108 could be fulfilled (by decreasing the maximum value Emax≤100lx and by increasing the width of the beam), at the limit because of the low interior vehicle angle (18.3º)
DRL H15, optical surfaces in Upper Part Reflector
ECE : R87 is not fulfilled
USA + Canada : CMVSS108 is fulfilled without margin
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4. Feasibility study Dimensions Comparison with current Golf
Low Beam H7 – Left Hand
High Beam / DRL – Left Hand
Current Golf
Golf A7
½ left width (mm) 73 72 58 60
½ right width (mm) 62
½ high size (mm) 65 49 40 46
½ low size (mm) 68 76
Interior vehicle Output Angle (º)
19.5
24.5 18
18.3
Exterior vehicle Output Angle (º) 43 42
43.9
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5. Lighting feasibility study Low Beam – Analysis of Dimensions*
* Size of the hole must be checked
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6. Lighting feasibility study HB-DRL – Analysis of Dimensions

7. Lighting feasibility study Low Beam – With all geometry – Lens Loss estimated
LB H7 (12V) - Left Side
Flux : 541 lm Maxi : 45.4 lx
ECE – R112B LB
The distribution is not cut by the geometry
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8. Lighting feasibility study High Beam – With all geometry – Lens Loss estimated
HB H15 (13.2V) - Left Side
Flux : 543 lm Maxi : 119 lx
ECE – R112B HB
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9. Lighting feasibility study High Beam – With all geometry – Lens Loss estimated
HB H15 (12.0V) - Left Side
Flux : 402 lm Maxi : 88 lx
ECE – R112B HB
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10. Lighting feasibility study Comparison basis version with current Golf
Low Beam H7 – Left Hand
Current Golf
Golf A7
Flux
552 lm
541 lm
Max Value
54 lx
45.4 lx
Width of the beam (0.4 lx)
-33º to 18º
-32º to 20º
High Beam – Left Hand
Current Golf
Golf A7
Flux
560 lm
543 lm
Max Value
110 lx
119 lx
Width of the beam (0.4 lx)
-16º to +16º
-18º to +18º
Recommendations to get the better performances :
LOW BEAM
Maximum: it is not a problem, it will be adjusted in serial definition to achieved the reference.
HIGH BEAM
To adjust the definition, reducing the maximum according USA regulation requirements
To improve the width of the beam : increasing the interior output angle to reach a value of 20º
Reference flux is almost achieved: increase output.
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11. Signalling feasibility study
DRL H15 ( V) - Left Side – Simulation with all geometry
ECE regulation : KO, Maxi over 1200cd (due to the wall). No margin
USA + CANADA : OK without margin
Flux : 102 lm
ECE – R87
USA/Canada – CMVSS108
Not enough output at inside vehicle for the DRL (lens)
Maxi > 1200 Cd due to the wall : the wall must include stripes and/or change inclination
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12. Signalling feasibility study
DRL H15 (198 12V – No homologation voltage) - Left Side – Simulation with all geometry
ECE regulation :KO
USA + CANADA : KO
Flux : 68 lm
ECE – R87
USA/Canada – CMVSS108
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13. Conclusions Lighting: Signaling: OK
Output inside angle must be increased in order to fulfill DRL regulations for USA-CANADA.
Wall must include stripes or change its inclination to avoid spots over the regulation.
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