[Dim77]

Αρχική Δημοσίευση από Nikos120i

Δε ξέρω που το διαβάσατε αυτό αλλά είναι πλήρως ανακριβής.

Εσωτερικές πηγές έλεγαν από την αρχή για διπλοσύμπλεκτο Μ κιβώτιο. Ίσως μερικοί μπερδεύτηκαν και το ονόμασαν "αυτόματο" αντί για "διπλοσύμπλεκτο".

Νίκο, αν διαβάσεις πώς ξεκίνησε η ''φήμη'' στο post #9 παρέθεσα και τα link με τα άρθρα που ανέφεραν καθαρά ότι το DCT δεν αντέχει τη ροπή και χωρίς άλλο σχεδιασμό από την αρχή δε θα τα καταφέρουν. Μίλαγαν για τοποθέτηση steptronic.

http://wot.motortrend.com/2012-bmw-m...tter%2BTraffic

http://www.worldcarfans.com/11102163...ic-only-bmw-m5

Since spy shots first appeared last summer of the F10 BMW M5, it has been clear it will be the first M car available only with a fully automatic transmission, with manumatic controls of course. The spy shots were of the “planned leak” variety, allowing spy photographers to peek inside the next M5’s cabin. The transmission mated to the twin-turbo, gas direct-injection 4.4-liter V-8 will be a ZF eight-speed automatic, with no manual or twin-clutch transmission offered.

The X5 M and X6 M come with automatics, of course, but we’re counting them as crossover/utility vehicles.

Word is that BMW tried to adapt the Getrag M Dual Clutch Transmission (M DCT) for the F10 M5. M is tipped to have tuned the car’s twin-turbo V-8 to more than 550 horsepower. Although the torque number remains unknown, it’s obviously too high for the M DCT. BMW M discovered that the transmission would have to be beefed up with bigger actuators, which would slow down the transmission’s response time. The only way it could have worked was with an extensive redo of the M DCT. So BMW’s M division chose to go with the eight-speed manumatic only.

Read more: http://wot.motortrend.com/2012-bmw-m...#ixzz1GkNAljRK

BMW may be left no choice but to offer the upcoming 2012 M5 solely with an automatic transmission.

According to a report by Motor Trend, BMW engineers ran into trouble fitting the M Dual Clutch Transmission (M DCT) to the F10 M5. Apparently, the torque is too much for the M DCT to handle with the 4.4 liter twin-turbo V8 dialed up to around the 550 horsepower (410 kW / 558 PS) mark. The configuration's torque rating remains unknown.

M division engineers considered adding larger actuators to the M DCT but that would slow the gearbox's response time. Only a complete revision of the M DCT would do and that appears to be too big a challenge, in terms of work required and costs, for BMW.

So, the only alternative left is to fit the F10 M5 with the ZF 8-speed automatic (sequential with paddle-shifters) gearbox and leave the M5 as an automatic-only just like the X5 M and X6 M models. Of course, the M5 is in a class of its own being one of the core M division models.

It will definitely pain M enthusiasts to know that there will be no proper manual gearbox available.

Read more: http://www.worldcarfans.com/11102163...#ixzz1GkNSSFBl

Στο τέλος, περιμένουμε, θα κυκλοφορήσει και θα δούμε τι έχει. Άλλωστε αυτά είναι κυρίως ...εγκυκλοπαιδικά