http://www.imiplc.com/~/media/Files/I/IMI/site-visit-brno -2015/precision-all-together-new.pdf
Scroll down to page 35. IMI is a subsidiary of Norgren, the company that also supplies controllers for the Proxima Power transmission from 2008 onwards, and also the HSX, HD and Crystal.
It appears to be a 2nd prototype, as the first functional prototype had four DSG range shifts behind the standard 3speed powershift module, which was a design with inline top shafts. This one has three gear shift forks, which appear to be offset, which may indicate that this is a design with two parallel topshafts, similar to John Deeres Direct Drive.
The prototype in the photo may be the 2nd version (on Espacenet, click on to the next page of the patent description) of what Zetor patented in 2012:
http://worldwide.espacenet.com/publicationDetails/originalDocument?FT=D&date=20150409&DB=worldwide.espacenet.com&locale=en_EP&CC=US&NR=2015096409A1&KC=A1&ND=4
They patented a way to shift the reverse gears by the dual clutch gears. One topshaft is shifted into reverse, then engaged by the corresponding DSG clutch pack.
I keep mending my brains over it. If it works, its the best solution in the world. But as far as i can fathom, if the lower friction clutch is used to drive the upper secondary shaft with a gearwheel engaged, it is impossible to preselect another gear on the lower shaft because this shaft is already driven and preselecting the gear will be impossible: In reverse this transmission cannot be powershifted as the description says, it will have to disengage drive power to shift gears. It will only work when both secondary shafts are equipped with each its own mechanical synchro shuttle gear...
I am hesitant to say that the emperor is naked because transmissons arent my field of expertise, but someone is making a thought error in relation to this patent and i hope its just me
Anyways, the document says all gears are reversible under load, so they have added a synchro shuttle gear for each secondary shaft.
Scroll down to page 35. IMI is a subsidiary of Norgren, the company that also supplies controllers for the Proxima Power transmission from 2008 onwards, and also the HSX, HD and Crystal.
It appears to be a 2nd prototype, as the first functional prototype had four DSG range shifts behind the standard 3speed powershift module, which was a design with inline top shafts. This one has three gear shift forks, which appear to be offset, which may indicate that this is a design with two parallel topshafts, similar to John Deeres Direct Drive.
The prototype in the photo may be the 2nd version (on Espacenet, click on to the next page of the patent description) of what Zetor patented in 2012:
http://worldwide.espacenet.com/publicationDetails/originalDocument?FT=D&date=20150409&DB=worldwide.espacenet.com&locale=en_EP&CC=US&NR=2015096409A1&KC=A1&ND=4
They patented a way to shift the reverse gears by the dual clutch gears. One topshaft is shifted into reverse, then engaged by the corresponding DSG clutch pack.
I keep mending my brains over it. If it works, its the best solution in the world. But as far as i can fathom, if the lower friction clutch is used to drive the upper secondary shaft with a gearwheel engaged, it is impossible to preselect another gear on the lower shaft because this shaft is already driven and preselecting the gear will be impossible: In reverse this transmission cannot be powershifted as the description says, it will have to disengage drive power to shift gears. It will only work when both secondary shafts are equipped with each its own mechanical synchro shuttle gear...
I am hesitant to say that the emperor is naked because transmissons arent my field of expertise, but someone is making a thought error in relation to this patent and i hope its just me
Anyways, the document says all gears are reversible under load, so they have added a synchro shuttle gear for each secondary shaft.
