Automatic transmission for Harley Davidson
#21
09-08-2015, 12:43 PM
Cruiser
#23
09-08-2015, 01:45 PM
My wife has a problem with the clutching/shifting coordination stuff. She would ride if it weren't for that. She would like an automatic so she could ride, funny though, she is extremely smart and a professional woman (CPA) but the controls the motorcycle kick her butt.
I remember as a kid, having a Honda CT90 I think it was, looked more like a scooter than a motorcycle and it had an automatic clutch, just let off the gas and shift. That was nice and I think that would help my wife a lot.
I remember as a kid, having a Honda CT90 I think it was, looked more like a scooter than a motorcycle and it had an automatic clutch, just let off the gas and shift. That was nice and I think that would help my wife a lot.
#26
09-09-2015, 07:20 AM
Road Master
We know these full automatic gearboxes including clutches already for decades. They were used in the past in small 2 cyl car of the brand DAF (indeed, the personal car division of the truck manufacturer before they sold it to Volvo). The name was Variomatic and was widely applied in delivery cars and small personal cars. Later on up to 2.0 liters Volvo cars. The Variomatic was a Dutch invention of DAF in 1959 already and perfected later on.
The clutch is a automatic centrifugal friction clutch and the drive system consists of two pullies and a V-belt like the drive belt of a HD. The pully halves can move to each other and increase the diameter of the belt, move from each other and the diameter of the belt around the pullu become less. These variations are great and comparable with gear 1-6 but stepless. In the sprint these Variomatics were unbeatable, even for handshifted cars with much more cylinders and piston volumes. But indeed, they consumed a lot of fuel (+15-20% above manual shifting cars) but they were extremely reliable, strong. I think HONDA and FIAT/Lancia bought the system for their small CVTT cars and sportscars(continious variable transmission)
The clutch is a automatic centrifugal friction clutch and the drive system consists of two pullies and a V-belt like the drive belt of a HD. The pully halves can move to each other and increase the diameter of the belt, move from each other and the diameter of the belt around the pullu become less. These variations are great and comparable with gear 1-6 but stepless. In the sprint these Variomatics were unbeatable, even for handshifted cars with much more cylinders and piston volumes. But indeed, they consumed a lot of fuel (+15-20% above manual shifting cars) but they were extremely reliable, strong. I think HONDA and FIAT/Lancia bought the system for their small CVTT cars and sportscars(continious variable transmission)
Last edited by Bart van der Meulen; 09-09-2015 at 07:23 AM.
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