Open Issue: Warm up Cycle and Temperatures Proposal By India Based on Temperature Data collected on WMTC for Motorcycles

Spark Plug Seat / Lubrication Oil Temperature Data Collection On WMTC For Motorcycles Model 1– (Air cooled) - Class 1 - Speed and Lub. Oil/ spark plug seat temperature trace Model 2– (Air cooled) – Class 1 - Speed and Lub. oil / spark plug seat temperature trace

Observations Model No. WMTC class Cooling Engine start Temp 0C Lub. Oil / Spark plug seat Cycle Time for Lub. Oil / Spark plug seat temperature  Time to reach 50 0C Lub. Oil temp Relevant Spark plug seat temp Time to reach 60 0C Lub. Oil temp 70 0C Lub. Oil temp 1 Air 22 / 31 548 sec 119 0C 788 sec 118 0C 1196 sec 134 0C 2 27 / 39 415 sec 124 0C 611 sec 130 0C 906 sec 148 0C

INDIA Proposal The vehicle warm up shall be based on respective Type I test cycle applicable for the class of vehicle. It is proposed that temperature measurement to monitor vehicle warm up condition shall be at spark plug seat instead of monitoring at various temperatures like coolant, oil, cylinder head / cylinder surface for various configurations like air cooled, water cooled, oil cooled or dry/wet sump, etc. Monitoring spark plug seat temperature is an unique and standardized location for all above combinations without any hurdle for both manufacturer as well as test authorities. Based on the above, we can finalize the minimum temperature acceptance criteria for the vehicle warm up to be measured at spark plug seat. Other CPs are requested to collect data on different class of vehicles to conclude on this point.

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