Honda secret MotoGP transmission revealed Sport Rider

22 Мар 2015 | Author: | Комментарии к записи Honda secret MotoGP transmission revealed Sport Rider отключены
Honda RC212V

Honda secret MotoGP transmission revealed


since the beginning of pre-season testing, trackside observers that the factory Honda sounded different—notably, that gearshifting was almost imperceptible. of the usual hesitation and “pop” shifts caused by unburnt being ignited when the system came back (“powershifters” momentarily cut spark to power which allows a transmission to accomplish an upshift backing out of the throttle or using the the Hondas simply changed note in an instantaneous and nearly fashion. Immediately claims of using a version of its electronic DCT used on its latest VFR1200F the rounds, but the problem there is MotoGP regulation prohibit use of any electronic means of gearchange”.

FIM Director Mike Webb was shown both the drawings and the transmission in a closed-door meeting by reps to ensure that the was indeed legal. More is kept by having only one technician change gearsets at no one other than this HRC is allowed to remove the gear cassette to change a gear on any of the factory Hondas ridden by the Honda squad, or San Carlo Gresini’s Marco Simoncelli, who is provided with a factory

Numerous theories and conjecture since abounded on the Internet, but no solid lead on the transmission’s has been found. Until

Thanks to the U.S. Patent and Office’s website () as well as Patents (), any and all patents applied for can be in complete detail in order to inventors to search and see if someone has discovered their idea. A creative searching nets you interesting information, but it takes effort.

By “creative searching”, we that corporations know scour the USPTO site day looking for corporate secrets they’re officially unveiled, so intentionally file the patents names and descriptions that are as as possible. Thus, you won’t this patent under or “HRC” or “MotoGP”.

A particular applied for by a Mr. Matsumoto (who has other patents, some Honda Japan and others by shows a transmission that an innovative cam/pawl setup the countershaft itself to engage gears (similar to the Xtrac a company that works Honda’s IndyCar engine rather than sliding the across a mainshaft as with a constant mesh sequential transmission.

However, the Japan Patent website () shows a patent for by Mr. Matsumoto and another engineer for an transmission design—only it also that Honda owns patent. There are several on the JPO patent application that the device on a V-engine case, one looks very close to the engine.

Which is substantial that this is indeed the on the factory Hondas.

A conventional constant mesh motorcycle changes gears by sliding one across a mainshaft until it into a driven gearwheel via “dogs”—lugs cast into one that fit into holes in gearwheel. Moving the gears the shaft is accomplished by “yokes” or forks”, which are controlled by a “drum”.

Because the dogs are so that the gears lock under power, power be interrupted so that the gear can be disengaged. Sliding the gearwheels the shaft requires time as

With the Honda multi-stage there are no shift forks, and is no lateral movement of the gearwheels. of using dogs cast the gears to lock them to the the Honda setup uses a of cam-type rods that back and forth inside the itself. The cam-type control actuate swingable pawls each gear that them to the countershaft when a change is enabled.

Honda RC212V

The pawls and the machined into the inner of the gears are designed in such a way when the next gear engaged, the pawls on the previous detach naturally. This that there is no power cut power is continuously transmitted, and no actuation is necessary.

Because is no large shift drum to the shift forks, and since the do not slide laterally on the countershaft/mainshaft, the cluster can be made more The gears can be made stronger as since there is more for gear teeth width.

The patent—like most of its kind—is a and tedious 30,000-word document goes into excruciating of the transmission’s design and how it functions. it is drawn up in extensive legalese it can be quite a job to decipher even the basic premise, as 40-50 are used to describe something can be stated in 10, and many paragraphs repeated introductory sentences for purposes.

Interestingly, we found one that states the multi-stage cannot be downshifted under (as well as not be upshifted under Whether naturally by design or unless there is an electronic that we haven’t found in the yet (which is quite possible), if you a mistake on your upshift, you just bang it back a gear to get the rpm up unless you back out of the

When veteran journalist Ray Abrams asked Dani and Casey Stoner at Qatar the transmission in their RC212Vs, he got interesting answers. “It’s said Pedrosa. “Basically you are in the corner, the shifting it’s a smoother so the bike doesn’t do so like this (pumping hands). So if you are changing with or maybe this corner up, the bike is not shaking so much on the So this is something positive, the shock is not doing any reaction and the traction is more stable.” heard that the factory riders were complaining downshifting with the new transmission, and asked, Pedrosa concurred, yes.”

Stoner agreed that the new helped, but noted that not the magic pill that is for Honda’s current domination of the class. “Changes gear a bit faster, it’s just basically,” said the Australian. of a big clunk, it sort of just from one to the next a little bit But yeah, for me the bike’s no faster, just smoother.

So when on the edge of the tire, when you gear it doesn’t make the quite as unsettled. In the past there’s a gap in the thing, it makes the sort of unsettled. But with one there’s a smaller gap and it’s a lot so you don’t have the bike so much. And this is its advantage. It you better feeling, better

Yeah, for me the way it works is nice, but not the race-winning solution.” Stoner agreed that downshifting was an issue. “It’s also a bit aggressive coming back (downshifting). Sometimes you struggle to get gears. Coming back a sometimes I find it a little bit but going up the gears it’s and smooth.”

Honda RC212V
Honda RC212V
Honda RC212V
Honda RC212V
Honda RC212V
Honda RC212V

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