[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]
> What's this? A fly-by-wire (FBW) throttle basically uses electronics to modulate the opening of the throttle based upon the position of the accelerator pedal. > and most important will it have any benefit on our cars, > especially the dark ones I presume. I don't think so, unless you were to couple it with other gadgetry (see below). It would save you having to replace throttle cables, though........ http://www.autospeed.com describing the new Selespeed gearbox available on the Alfa Romeo 156 (which has further features besides simply the FBW throttle): The new Alfa 156 is available with an optional Selespeed 5 speed automatic gearbox. The gearbox - which is controlled by buttons mounted on the steering wheel - is a five speed manual gearbox with a dry plate clutch. Effectively, it is a robotised manual gearbox. In normal driving mode, the Selespeed gearbox takes approximately the same amount of time as a typical driver using a manual gearbox, but when the gearbox is used in Sport mode (engaged by pressing the accelerator through more than 60 per cent of its travel over 5000 rpm), gearshifts are accomplished in less than 0.7 of a second. Gear changes are made by the computer system which also communicates with the electronic engine throttle. When the driver changes gear, the electronic unit controls the gearbox and requests the clutch opening, reducing torque regardless of the accelerator position, and selecting and engaging the gears. Three actuators are used - one controlling the clutch, the other the gear engagement and the third the gear selection. The torque management and fly-by-wire system is the same Magneti Marelli system used in the Ferrari 355 F1. It communicates continuously with the Bosch Motronic engine management system that controls the engine. To achieve this, the fly-by-wire system calls on information from the position of the accelerator pedal, the road speed, engine speed, and the power requirements being indicated by the driver. ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/