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

2. 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

3. 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

4. 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.

5. Thank you