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Improved Autothrottle

 Speed-limit function, in addition to conventional hold-speed
  (+7)
(+7) 		  [vote for,
against]

I often find myself spending an inordinate amount of time watching my speedometer rather than the road - usually due to unreasonably low speed limits and a car quite capable of comfortably cruising at 160 km/h.

What I propose is a new function added to the autothrottle that most cars already posses:

When the desired maximum speed is reached, the user taps the cruise-control 'set' button to program the system, the only difference between a conventional cruise control being the mode the autothrottle is in. In this case it would be in 'never exceed this speed' mode, rather than 'hold this speed'.

Under this mode, the user could drive around without concern for exceeding the artificial self-imposed speed limit, therefore spending more time watching the road and less stress worrying about speeding. Of course downhill sections will still require braking of some sort, but braking will not disengage the autothrottle - in fact, below the set-limit, the improved autothrottle functions transparently.

Note: This system is primarily intended for vehicles of the 'drive by wire' type, due to the simplicity of implementation. Also, the system can be disengaged manually by switching off the cruise control, or by making an unusually deep/rapid throttle request.

(p.s. this is my first posting from a mobile phone - yeeehaw!)

—TIB, Mar 17 2008

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       Sounds like a good idea.
—MaxwellBuchanan, Mar 17 2008
   

       Word up.
—Texticle, Mar 17 2008
   

       Much better than the annoying beeps when you exceed a predefined limit.
—sprogga, Mar 18 2008
   

       (+)   

       You really shouldn't halfbake from a mobile phone while you are driving though.   

       [2 fries]: Although I was in the 'ol Iron Horse when posting this idea, I wasn't actually driving, but that does sound like a good challenge...   

       Will update in a future anno (if I live through the experience).
—TIB, Mar 18 2008
   

       This is baked - a low-end Mercedes Benz I drove recently had a speed limiter function as part of the cruise control. It would refuse to go over the set speed, and even braked on steep downhills to avoid speeding.   

       However, I didn't find it as useful as the "maintain this speed" function.
—FishFinger, Mar 18 2008
   


 

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