This is Zero-shift from UK which did not have any commercial success. The patent was finally put on sale years ago, and was probably bought by a motorcycle manufacturer
the seamless basically let run two gears in at the same time for a moment:this happens couse the seamless system provides a hub on each shaft. one between the gears of the first and second, one between second and third, etcetera. On this hub there are three pairs of "opposite direction-grooved" cursors on the two sides, in such a way the three sliders can engage the first gear, but will disengage (a bit like a slipper clutch) when the gear speed is superior to the one of the hub.
same thing for the other three cursors on the second gear side. as soon as the three on the first gear side disengage, the second gerar side cursors automatically disengage the hub and engage the gear.
It also appears to allow you to shift straight from first to second instead of having to skip past neutral so to speak. I think that will prove to be a big advantage and will be cool on road bikes too.
Looks like a conventional car Gbox with the hub splined to the output shaft and free spinning gears driven by the counter-shaft, but with special selector rings - car uses one fork - and hub. It looks like the rings have big blocks that key into the centre hub, and small tabs that engage with the 3 plateau blocks on the face of the gear. The right ring moves left, to the centre, and grabs the output shaft somehow - ? - and starts the OP shaft spinning. The left ring moves left and engages with 1st gear plateau blocks, and then moves right to disconnect 1st while keeping the shaft spinning - ? - . The right ring moves right and engages with 2nd gear plateau blocks, and the shaft spins faster. I can't see how centring a ring grabs the shaft, unless the ring's large hub blocks go through to the other side of the hub and engage with the opposite gear face, so I would like to see a clearer video or commentary to tell you how that works.
The issue is that you don't have engine breaking with this solution, because the tooth is made for pushing the gear but not to be pushed by the gear. If the gear pushes on the tooth it will disengage.
To me this reduces the time between shifts, but it does not reduce the torque pulse as claimed. (what does rossi know anyway) All this does is avoid the situation where a conventional dog has to wait 120 degrees to grab the gear.
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This is Zero-shift from UK which did not have any commercial success. The patent was finally put on sale years ago, and was probably bought by a motorcycle manufacturer
the seamless basically let run two gears in at the same time for a moment:this happens couse the seamless system provides a hub on each shaft. one between the gears of the first and second, one between second and third, etcetera. On this hub there are three pairs of "opposite direction-grooved" cursors on the two sides, in such a way the three sliders can engage the first gear, but will disengage (a bit like a slipper clutch) when the gear speed is superior to the one of the hub.
same thing for the other three cursors on the second gear side. as soon as the three on the first gear side disengage, the second gerar side cursors automatically disengage the hub and engage the gear.
It also appears to allow you to shift straight from first to second instead of having to skip past neutral so to speak. I think that will prove to be a big advantage and will be cool on road bikes too.
Looks like a conventional car Gbox with the hub splined to the output shaft and free spinning gears driven by the counter-shaft, but with special selector rings - car uses one fork - and hub.
It looks like the rings have big blocks that key into the centre hub, and small tabs that engage with the 3 plateau blocks on the face of the gear.
The right ring moves left, to the centre, and grabs the output shaft somehow - ? - and starts the OP shaft spinning.
The left ring moves left and engages with 1st gear plateau blocks, and then moves right to disconnect 1st while keeping the shaft spinning - ? - .
The right ring moves right and engages with 2nd gear plateau blocks, and the shaft spins faster.
I can't see how centring a ring grabs the shaft, unless the ring's large hub blocks go through to the other side of the hub and engage with the opposite gear face, so I would like to see a clearer video or commentary to tell you how that works.
video doesn't explain anything
The issue is that you don't have engine breaking with this solution, because the tooth is made for pushing the gear but not to be pushed by the gear. If the gear pushes on the tooth it will disengage.
But MOTO GP bikes can do engine braking.
@@JohnKickboxing But if you are downshifting you loose the enginebrake because in theory you have to blip the gearbox to make it downshift.
@@Wolfox360 They hold clutch prior blipping and downshifting.
To me this reduces the time between shifts, but it does not reduce the torque pulse as claimed. (what does rossi know anyway) All this does is avoid the situation where a conventional dog has to wait 120 degrees to grab the gear.
yamaha will be using this tech today
Pink Floyd - Time
yes
mi