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Technical director responds to Moto3 rev limit claims

"There is nothing unusual or unexpected about how the rev limiter works and that the cut point is consistent on all engines. Nevertheless, moderate and temporary overshoots of the defined rev limit were identified"
MotoGP Technical Director Danny Aldridge has issued the following statement in response to KTM's allegations that main rival Honda has been exceeding the Moto3 rev limit.

“You will probably be aware that there was recent speculation in the specialist media that data existed which showed some Moto3 machines exceeding the maximum 13,500 rpm limit imposed in the regulations.

“Frankly, this came as no surprise to us because with a single cylinder 4-stroke engine it is very difficult for the ECU to cut power at precisely the moment when the rev limit is reached. Depending on the signal used by the ECU to measure the revs there can be a period of a few milliseconds where target revs are exceeded by a small amount.

“After further checks on the 2015 limiter we have established that there is nothing unusual or unexpected about how the rev limiter works and that the cut point is consistent on all engines. Nevertheless, moderate and temporary overshoots of the defined rev limit were identified.

“All regulations for the Moto3 class are agreed within the Moto3 Class Working Group which includes delegates from all participating manufacturers. A meeting of this Group had already been convened to take place during the Qatar GP. The original purpose was to discuss future developments in this class. We will now add the rev limit issue to the agenda for this meeting.

“There is no desire to reduce the point at which the limiter cuts power just to avoid data showing minimal overshoots. It may therefore be necessary to modify regulations to take account of inevitable overshoots but, of course, other solutions may also be considered by the working group.

“Further information will be provided after the Qatar meeting.”


Tagged as: Honda , KTM , Moto3

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shakennstirred

March 12, 2016 6:55 AM
Last Edited 119 days ago

RogRishton: So let's get this right. We have a regulatory body that sets a limit but then says 'hey-ho these things happen' when someone exceeds that limit?? So the next time someone has half a litre of fuel too much or a piston 0,03mm oversize we can all just say - it's OK shiz happens. Surely if there's a limit the onus should be on the competitors to keep within itwhatever or chaos ensures....
Its not like there going 1000rpm over, its a 100rpm

mrfill

March 12, 2016 12:34 AM

It is the ECU that controls the maximum revs, not the competitors, and the ECU is a stock component, identical on all bikes. The rev limiting would be hard coded and not amendable by mapping. With all the slipstreaming going on in moto3, the bike with the best draft could be going faster than max revs would allow. Just watch and see how one bike can suddenly fly past the others, who are at maximum. No big surprise really...



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