ASEP IMMA inputs to R51 ASEP IWG

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Presentation transcript:

ASEP IMMA inputs to R51 ASEP IWG 12 Sept 2018

R51 ASEP IWG Motorcycle related agenda items:

IMMA committed to improve ‘real world’ motorcycle noise: IMMA is aligned with the position of Germany, as in GRB-66-12: ‘Reduce sound level limits in a moderate way and take a bigger focus on Manipulation, Loop-holes, Grey-Areas and enforcement in near future!’ IMMA Approach: Short term : R41 Mandatory ASEP  GRB/2018/11 Medium term: Expand the ASEP provisions to reflect better real world noise: Test in any throttle position allowed Widen the vehicle speed boundaries to 20 – 100 km/h Test in all gears Keep current mistery points concept (=additional operating conditions) to keep testing burden realistic Technical details are being evaluated and worked out IMMA requests a dedicated R41 Task Force to take into account Motorcycle particularities

Current R41.04 ASEP test method can reflect better real world driving circumstances by expanding the test conditions Sample of ASEP test results with a motorcycle with exhaust flaps: limit - Any throttle: -WOT -Cruising -Partial -Progressive Any gear Expanded speed range (incl. 20-100kmh)

Motorcycle noise has good correlation with engine speed due to low influence of tyre noise and open architecture of the motorcycle’s engine (no covering). Reference from document “IMMA/JAMA proposal for ASEP 2006/11/22”

Extended R41 ASEP and v*a concept Motorcycle with PMR 200W/kg Good correlation between rpm and sound level Lack of correlation between v*a and sound level ‘CRS’ = Cruise = constant speed ‘Slow’ = Throttle smoothly and fully opened ‘WOT’ = (instant) Wide Open Throttle (as currently in Annex 7 of R41-04)

Timeline: Revised R41 ASEP proposal ready by end 2019. Motorcycle ASEP discussions should be finished on time before the initiatives on lower Type Approval limit values* start, because IMMA believes only lowering Type Approval limits will not solve the real world sound emission issue. *EC proposal on lower Type Approval limit values expected end 2019. Starting a completely new ASEP approach (currently not engineered for motorcycles) will need new limits as well and is not expected to meet the above timeline.

Conclusion: A dedicated Motorcycle sub-group can take into account Motorcycle needs in terms of technical differences and timeline. Thank you for your attention